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1. The Optical Two- and Three-dimensional Fundamental Plane Correlations for Nearly 180 Gamma-Ray Burst Afterglows with Swift/UVOT, RATIR, and the Subaru Telescope

Author

M. G. Dainotti, S. Young, L. Li, D. Levine, K. K. Kalinowski, D. A. Kann, B. Tran, L. Zambrano-Tapia, A. Zambrano-Tapia, S. B. Cenko, M. Fuentes, E. G. Sánchez-Vázquez, S. R. Oates, N. Fraija, R. L. Becerra, A. M. Watson, N. R. Butler, J. J. González, A. S. Kutyrev, W. H. Lee, J. X. Prochaska, E. Ramirez-Ruiz, M. G. Richer, S. Zola, Ministerio de Ciencia e Innovación (España), and European Commission

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, gamma-ray bursts, Physics::Optics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited., Gamma-ray bursts (GRBs) are fascinating events due to their panchromatic nature. We study optical plateaus in GRB afterglows via an extended search into archival data. We comprehensively analyze all published GRBs with known redshifts and optical plateaus observed by many ground-based telescopes (e.g., Subaru Telescope, RATIR) around the world and several space-based observatories such as the Neil Gehrels Swift Observatory. We fit 500 optical light curves, showing the existence of the plateau in 179 cases. This sample is 75% larger than the previous one, and it is the largest compilation so far of optical plateaus. We discover the 3D fundamental plane relation at optical wavelengths using this sample. This correlation is between the rest-frame time at the end of the plateau emission, ${T}_{\mathrm{opt}}^{* }$, its optical luminosity, Lopt, and the peak in the optical prompt emission, Lpeak,opt, thus resembling the three-dimensional (3D) X-ray fundamental plane (the so-called 3D Dainotti relation). We correct our sample for redshift evolution and selection effects, discovering that this correlation is indeed intrinsic to GRB physics. We investigate the rest-frame end-time distributions in X-rays and optical (${T}_{\mathrm{opt}}^{* }$, ${T}_{{\rm{X}}}^{* }$), and conclude that the plateau is achromatic only when selection biases are not considered. We also investigate if the 3D optical correlation may be a new discriminant between optical GRB classes and find that there is no significant separation between the classes compared to the Gold sample plane after correcting for evolution. © 2022. The Author(s). Published by the American Astronomical Society., D.A.K. acknowledges support from Spanish National Research Project RTI2018-098104-J-I00 (GRBPhot). S.Y. and D.L. acknowledge the support by the United States Department of Energy in funding the Science Undergraduate Laboratory Internship (SULI) program. S.Y. gratefully acknowledges the support of the Vagelos Challenge Award at the University of Pennsylvania. R.L.B. acknowledges support from the DGAPA/UNAM IG100820 and the DGAPA/UNAM postdoctoral fellowship. N.F. acknowledges support from the DGAPA/UNAM IN106521. Some of the data used in this paper were acquired with the RATIR instrument, funded by the University of California and NASA Goddard Space Flight Center, and the 1.5-meter Harold L. Johnson telescope at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir, operated and maintained by the Observatorio Astronómico Nacional and the Instituto de Astronomía of the Universidad Nacional Autónoma de México. Operations are partially funded by the Universidad Nacional Autónoma de México (DGAPA/PAPIIT IG100414, IT102715, AG100317, IN109418, IG100820, IN106521, and IN105921). We acknowledge the contribution of Leonid Georgiev and Neil Gehrels to the development of RATIR. M.F., L.Z., and A.Z. are grateful for the support from the Scientific Caribbean Foundation. E.S. thanks the Latino Education Advancement Foundation for their support., With funding from the Spanish government through the Severo Ochoa Centre of Excellence accreditation SEV-2017-0709.

Published
2022

2. GRB 180620A: Evidence for Late-time Energy Injection.

Author

R. L. Becerra, F. De Colle, A. M. Watson, N. Fraija, N. R. Butler, W. H. Lee, C. G. Román-Zúñiga, J. S. Bloom, J. J. González, A. S. Kutyrev, J. X. Prochaska, E. Ramirez-Ruiz, M. G. Richer, and E. Troja

Subjects
GAMMA ray bursts, LIGHT curves, SPECIAL effects in lighting, PLATEAUS, ACCELERATION (Mechanics), PARTICLE emissions
Abstract

The early optical emission of gamma-ray bursts (GRBs) gives an opportunity to understand the central engine and first stages of these events. About 30% of GRBs present flares whose origin is still a subject of discussion. We present optical photometry of GRB 180620A with the COATLI telescope and RATIR instrument. COATLI started to observe from the end of prompt emission at T + 39.3 s and RATIR from T + 121.4 s. We supplement the optical data with the X-ray light curve from Swift/XRT. We observe an optical flare from T + 110 s to T + 550 s, with a temporal index decay αO,decay = 1.32 ± 0.01, and Δt/t = 1.63, which we interpret as the signature of a reverse shock component. After the initial normal decay the light curves show a long plateau from T + 500 s to T + 7800 s in both X-rays and the optical before decaying again after an achromatic jet break at T + 7800 s. Fluctuations are seen during the plateau phase in the optical. Adding to the complexity of GRB afterglows, the plateau phase (typically associated with the coasting phase of the jet) is seen in this object after the "normal" decay phase (associated with the deceleration phase of the jet), and the jet break phase occurs directly after the plateau. We suggest that this sequence of events can be explained by a rapid deceleration of the jet with td ≲ 40 s due to the high density of the environment (≈100 cm−3) followed by reactivation of the central engine, which causes the flare and powers the plateau phase. [ABSTRACT FROM AUTHOR]

Published
2019
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3. A Note on the Checking of Variable Gears as Used for Integrators

Author

R Butler

Subjects
Variable (computer science), Scale (ratio), Control theory, Integrator, Zero (complex analysis), General Medicine, Type (model theory), Mathematics
Abstract

A new technique is described for the accurate determination, with reference to some given scale, of the zero of a variable gear of the Bush type. Advantages over the now existing methods are claimed.

Published
1949

4. Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A.

Author

R. L. Becerra, S. Dichiara, A. M. Watson, E. Troja, N. Fraija, A. Klotz, N. R. Butler, W. H. Lee, P. Veres, D. Turpin, J. S. Bloom, M. Boer, J. J. González, A. S. Kutyrev, J. X. Prochaska, E. Ramirez-Ruiz, and M. G. Richer

Subjects
PHOTOMETRY, REDSHIFT, GAMMA ray bursts, X-rays, HARDNESS, PROBABILITY theory, FILTERS & filtration
Abstract

We present observations of the possible short GRB 180418A in γ-rays, X-rays, and in the optical. Early optical photometry with the TAROT and RATIR instruments shows a bright peak (≈14.2 AB mag) between T + 28 and T + 90 s that we interpret as the signature of a reverse shock. Later observations can be modeled by a standard forward shock model and show no evidence of a jet break, allowing us to constrain the jet collimation to θj > 7°. Using deep late-time optical observations, we place an upper limit of r > 24 AB mag on any underlying host galaxy. The detection of the afterglow in the Swift UV filters constrains the GRB redshift to z < 1.3 and places an upper bound on the γ-ray isotropic equivalent energy Eγ,iso < 3 × 1051 erg. The properties of this GRB (e.g., duration, hardness ratio, energy, and environment) lie at the intersection between short and long bursts, and we cannot conclusively identify its type. We estimate that the probability that it is drawn from the population of short GRBs is 10%–30%. [ABSTRACT FROM AUTHOR]

Published
2019
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5. Late Central-engine Activity in GRB 180205A.

Author

R. L. Becerra, A. M. Watson, N. Fraija, N. R. Butler, W. H. Lee, E. Troja, C. G. Román-Zúñiga, A. S. Kutyrev, L. C. Álvarez Nuñez, F. Ángeles, O. Chapa, S. Cuevas, A. S. Farah, J. Fuentes-Fernández, L. Figueroa, R. Langarica, F. Quirós, J. Ruíz-Díaz-Soto, C. G. Tejada, and S. J. Tinoco

Subjects
GAMMA ray bursts, AFTERGLOW (Physics), ASTRONOMICAL photometry, LARGE astronomical telescopes, LIGHT curves
Abstract

We present optical photometry of the afterglow of the long GRB 180205A with the COATLI telescope from 217 s to about 5 days after the Swift/BAT trigger. We analyze this photometry in conjunction with the X-ray light curve from Swift/XRT. The late-time light curves and spectra are consistent with the standard forward-shock scenario. However, the early-time optical and X-ray light curves show atypical behavior; the optical light curve exhibits a flat plateau while the X-ray light curve shows a flare. We explore several scenarios and conclude that the most likely explanation for the early behavior is late activity of the central engine. [ABSTRACT FROM AUTHOR]

Published
2019
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6. Li nard phase plane integraph

Author

R Butler

Subjects
Mechanism (engineering), Physics, Classical mechanics, Plane (geometry), Differential equation, Order (ring theory), General Medicine, Damped oscillations
Abstract

A mechanical linkage is suggested for obtaining trajectories, corresponding to damped oscillations, in the Lienard plane. Its construction is based on the Henrici-Coradi instruments, although, as a second order differential equation is being analysed here, the mechanism is more intricate.

Published
1959

7. RATIR Follow-up of LIGO/Virgo Gravitational Wave Events.

Author

V. Zach Golkhou, Nathaniel R. Butler, Robert Strausbaugh, Eleonora Troja, Alexander Kutyrev, William H. Lee, Carlos G. Román-Zúñiga, and Alan M. Watson

Subjects
*ELECTROMAGNETIC waves, *GRAVITATIONAL waves, *NEUTRON stars, *GAMMA rays
Abstract

We have recently witnessed the first multi-messenger detection of colliding neutron stars through gravitational waves (GWs) and electromagnetic (EM) waves (GW 170817) thanks to the joint efforts of LIGO/Virgo and Space/Ground-based telescopes. In this paper, we report on the RATIR follow-up observation strategies and show the results for the trigger G194575. This trigger is not of astrophysical interest; however, it is of great interest to the robust design of a follow-up engine to explore large sky-error regions. We discuss the development of an image-subtraction pipeline for the six-color, optical/NIR imaging camera RATIR. Considering a two-band (i and r) campaign in the fall of 2015, we find that the requirement of simultaneous detection in both bands leads to a factor ∼10 reduction in false alarm rate, which can be further reduced using additional bands. We also show that the performance of our proposed algorithm is robust to fluctuating observing conditions, maintaining a low false alarm rate with a modest decrease in system efficiency that can be overcome utilizing repeat visits. Expanding our pipeline to search for either optical or NIR detections (three or more bands), considering separately the optical riZ and NIR YJH bands, should result in a false alarm rate ≈1% and an efficiency ≈90%. RATIR’s simultaneous optical/NIR observations are expected to yield about one candidate transient in the vast 100 deg2 LIGO error region for prioritized follow-up with larger aperture telescopes. [ABSTRACT FROM AUTHOR]

Published
2018
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8. Paying the price?

Author

D R Butler

Subjects
Protocol (science), business.industry, Political science, Subject (documents), Accounting, General Medicine, Annual report, European patent office, business
Abstract

The review of the Annual Report of the European Patent Office for 1987 (Physics Bulletin September 1987 p325) was factually incorrect in stating that the salaries of examiners in the office are tax-free. The salaries are subject to tax under Article 1 6 of the Protocol on Privileges and Immunities.

Published
1987

10. Erratum: "Photometric Observations of Supernova 2013cq Associated with GRB 130427A (2017, APJ, 837, 116)".

Author

R. L. Becerra, A. M. Watson, W. H. Lee, N. Fraija, N. R. Butler, J. S. Bloom, J. I. Capone, A. Cucchiara, J. A. de Diego, O. D. Fox, N. Gehrels, L. N. Georgiev, J. J. González, A. S. Kutyrev, O. M. Littlejohns, J. X. Prochaska, E. Ramirez-Ruiz, M. G. Richer, C. G. Román-Zúñiga, and V. L. Toy

Subjects
ASTRONOMICAL photometry, SUPERNOVAE, ASTRONOMICAL observations
Published
2017
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11. Photometric Observations of Supernova 2013cq Associated with GRB 130427A.

Author

R. L. Becerra, A. M. Watson, W. H. Lee, N. Fraija, N. R. Butler, J. S. Bloom, J. I. Capone, A. Cucchiara, J. A. de Diego, O. D. Fox, N. Gehrels, L. N. Georgiev, J. J. González, A. S. Kutyrev, O. M. Littlejohns, J. X. Prochaska, E. Ramirez-Ruiz, M. G. Richer, C. G. Román-Zúñiga, and V. L. Toy

Subjects
SUPERNOVAE spectra, STELLAR magnitudes, STAR observations, GAMMA ray bursts, ASTRONOMICAL photometry
Abstract

We observed the afterglow of GRB 130427A with the Reionization and Transients Infrared Camera (RATIR) instrument on the 1.5 m Harold L. Johnson telescope of the Observatorio Astronómico Nacional in Sierra San Pedro Mártir. Our homogenous griZY JH photometry extends from the night of the burst to three years later. We fit a model for the afterglow. There is a significant positive residual that matches the behavior of SN 1998bw in the griZ filters; we suggest that this is a photometric signature of the supernova SN 2013cq associated with the Gamma-ray burst. The peak absolute magnitude of the supernova is . [ABSTRACT FROM AUTHOR]

Published
2017
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12. SDSS J0159+0105: A RADIO-QUIET QUASAR WITH A CENTI-PARSEC SUPERMASSIVE BLACK HOLE BINARY CANDIDATE.

Author

Zhen-Ya Zheng, Nathaniel R. Butler, Yue Shen, Linhua Jiang, Jun-Xian Wang, Xian Chen, and Jorge Cuadra

Subjects
*BINARY black holes, *BLACK holes, *COMPACT objects (Astronomy), *STARS, *GRAVITATIONAL collapse
Abstract

We report a candidate centi-parsec supermassive black hole binary (SMBHB) in the radio-quiet quasar SDSS J0159+0105 at z = 0.217. With a modified Lomb–Scargle code (GLSdeDRW) and auto-correlation analysis, we detect two significant (at P > 99%) periodic signals at ∼741 day and ∼1500 day from the 8.1 yr Catalina V-band light curve of this quasar. The period ratio, which is close to 1:2, is typical of a black hole binary system with a mass ratio of 0.05 < q < 0.8 according to recent numerical simulations. SDSS J0159+0105 has two SDSS spectroscopic observations separated by ∼10 yr. There is a significant change in the broad Hβ profile between the two epochs, which can be explained by a single broad-line region (BLR) around the binary system illuminated by the aforementioned mini-disks, or a stream of gas flowing from the circumbinary disk to one of the SMBHs. From the single BLR assumption and the orbital period torb ∼ 1500 day, we estimate the total virial masses of MSMBHB ∼ 1.3 × 108M⊙, the average distances of BLR of ∼0.04 pc (∼50 lt-day, with ±0.3 dex uncertainty), and an SMBHB separation of d = (0.01 pc) (Trest/3.3 yr)2/3 ∼ 0.013 pc (15 lt-day). Based on analytical work, the postulated circumbinary disk has an inner radius of 2d = 0.026 pc (30 lt-day). SDSS J0159+0105 also displays unusual spectral energy distribution. The unique properties of SDSS J0159+0105 are consistent with it being a centi-parsec SMBHB. [ABSTRACT FROM AUTHOR]

Published
2016
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13. AN ULTRAVIOLET SPECTRUM OF THE TIDAL DISRUPTION FLARE ASASSN-14li.

Author

S. Bradley Cenko, Antonino Cucchiara, Nathaniel Roth, Sylvain Veilleux, J. Xavier Prochaska, Lin Yan, James Guillochon, W. Peter Maksym, Iair Arcavi, Nathaniel R. Butler, Alexei V. Filippenko, Andrew S. Fruchter, Suvi Gezari, Daniel Kasen, Andrew J. Levan, Jon M. Miller, Dheeraj R. Pasham, Enrico Ramirez-Ruiz, Linda E. Strubbe, and Nial R. Tanvir

Published
2016
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14. OPTICAL AND NEAR-INFRARED OBSERVATIONS OF SN 2013DX ASSOCIATED WITH GRB 130702A.

Author

V. L. Toy, S. B. Cenko, J. M. Silverman, N. R. Butler, A. Cucchiara, A. M. Watson, D. Bersier, D. A. Perley, R. Margutti, E. Bellm, J. S. Bloom, Y. Cao, J. I. Capone, K. Clubb, A. Corsi, A. De Cia, J. A. de Diego, A. V. Filippenko, O. D. Fox, and A. Gal-Yam

Subjects
LIGHT curves, OPTICAL spectra, GAMMA ray bursts, SUPERNOVAE, KINETIC energy
Abstract

We present optical and near-infrared (NIR) light curves and optical spectra of SN 2013dx, associated with the nearby (redshift 0.145) gamma-ray burst GRB 130702A. The prompt isotropic gamma-ray energy released from GRB 130702A is measured to be erg (1 keV to 10 MeV in the rest frame), placing it intermediate between low-luminosity GRBs like GRB 980425/SN 1998bw and the broader cosmological population. We compare the observed light curves of SN 2013dx to a SN 1998bw template, finding that SN 2013dx evolves ∼20% faster (steeper rise time), with a comparable peak luminosity. Spectroscopically, SN 2013dx resembles other broad-lined SNe Ic, both associated with (SN 2006aj and SN 1998bw) and lacking (SN 1997ef, SN 2007I, and SN 2010ah) gamma-ray emission, with photospheric velocities around peak of ∼ 21,000 km s−1. We construct a quasi-bolometric () light curve for SN 2013dx, only the fifth GRB-associated SN with extensive NIR coverage and the third with a bolometric light curve extending beyond . Together with the measured photospheric velocity, we derive basic explosion parameters using simple analytic models. We infer a 56Ni mass of , an ejecta mass of , and a kinetic energy of erg (statistical uncertainties only), consistent with previous GRB-associated supernovae. When considering the ensemble population of GRB-associated supernovae, we find no correlation between the mass of synthesized 56Ni and high-energy properties, despite clear predictions from numerical simulations that should correlate with the degree of asymmetry. On the other hand, clearly correlates with the kinetic energy of the supernova ejecta across a wide range of core-collapse events. [ABSTRACT FROM AUTHOR]

Published
2016
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15. HAPPY BIRTHDAY SWIFT: ULTRA-LONG GRB 141121A AND ITS BROADBAND AFTERGLOW.

Author

A. Cucchiara, P. Veres, A. Corsi, S. B. Cenko, D. A. Perley, A. Lien, F. E. Marshall, C. Pagani, V. L. Toy, J. I. Capone, D. A. Frail, A. Horesh, M. Modjaz, N. R. Butler, O. M. Littlejohns, A. M. Watson, A. S. Kutyrev, W. H. Lee, M. G. Richer, and C. R. Klein

Subjects
GAMMA ray bursts, AFTERGLOW (Physics), GALACTIC redshift, STAR observations, LIGHT curves
Abstract

We present our extensive observational campaign on the Swift-discovered GRB 141121A, almost 10 years after its launch. Our observations cover radio through X-rays and extend for more than 30 days after discovery. The prompt phase of GRB 141121A lasted 1410 s and, at the derived redshift of z = 1.469, the isotropic energy is Eγ,iso = 8.0 × 1052 erg. Due to the long prompt duration, GRB 141121A falls into the recently discovered class of ultra-long GRBs (UL-GRBs). Peculiar features of this burst are (1) a flat early-time optical light curve and (2) a radio-to-X-ray rebrightening around three days after the burst. The latter is followed by a steep optical-to-X-ray decay and a much shallower radio fading. We analyze GRB 141121A in the context of the standard forward–reverse shock (FS, RS) scenario and we disentangle the FS and RS contributions. Finally, we comment on the puzzling early-time (t ≲ 3 days) behavior of GRB 141121A, and suggest that its interpretation may require a two-component jet model. Overall, our analysis confirms that the class of UL-GRBs represents our best opportunity to firmly establish the prominent emission mechanisms in action during powerful gamma-ray burst explosions, and future missions (like SVOM, XTiDE, or ISS-Lobster) will provide many more of such objects. [ABSTRACT FROM AUTHOR]

Published
2015
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16. THE ENERGY DEPENDENCE OF GRB MINIMUM VARIABILITY TIMESCALES.

Author

V. Zach Golkhou, Nathaniel R. Butler, and Owen M. Littlejohns

Subjects
*GAMMA ray bursts, *GAMMA rays, *METAPHYSICAL cosmology, *FIREBALL model (Nuclear physics), *DIFFERENCES
Abstract

We constrain the minimum variability timescales for 938 gamma-ray bursts (GRBs) observed by the Fermi/Gamma-ray Burst Monitor instrument prior to 2012 July 11. The tightest constraints on progenitor radii derived from these timescales are obtained from light curves in the hardest energy channel. In the softer bands—or from measurements of the same GRBs in the hard X-rays from Swift—we show that variability timescales tend to be a factor of two to three longer. Applying a survival analysis to account for detections and upper limits, we find median minimum timescale in the rest frame for long-duration and short-duration GRBs of 45 and 10 ms, respectively. Less than 10% of GRBs show evidence for variability on timescales below 2 ms. These shortest timescales require Lorentz factors and imply typical emission radii cm for long-duration GRBs and cm for short-duration GRBs. We discuss implications for the GRB fireball model and investigate whether or not GRB minimum timescales evolve with cosmic time. [ABSTRACT FROM AUTHOR]

Published
2015
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18. Coronal Heating as Determined by the Solar Flare Frequency Distribution Obtained by Aggregating Case Studies

Author

James Paul Mason, Alexandra Werth, Colin G. West, Allison Youngblood, Donald L. Woodraska, Courtney L. Peck, Arvind J. Aradhya, Yijian Cai, David Chaparro, James W. Erikson, Koushik Ganesan, T. R. Geerdts, Thi D Hoang, Thomas M. Horning, Yan Jin, Haixin Liu, Noah Lordi, Zheng Luo, Thanmay S. Menon, Josephine C. Meyer, Emma E Nelson, Kristin A. Oliver, Jorge L Ramirez Ortiz, Andrew Osborne, Alyx Patterson, Nick Pellatz, John Pitten, Nanako Shitara, Daniel Steckhahn, Aseem Visal, Hongda Wang, Chaoran Wang, Evan Wickenden, John Wilson, Mengyu Wu, Nikolay Yegovtsev, Ingrid H Zimmermann, James Holland Aaron, Jumana T. Abdullah, Jonathan M. Abrams, Riley Abrashoff, Andres B. Acevedo, Iker Acha, Daniela M. Meza Acosta, Megan M. Adam, Dante Q. Adams, Kalvyn N Adams, Elena R Adams, Zainab A. Akbar, Ushmi H. Akruwala, Adel Al-Ghazwi, Batool H. Alabbas, Areej A. Alawadhi, Yazeed A. Alharbi, Mohammed S. Alahmed, Mohammed A. Albakr, Yusef J. Albalushi, Jonathan Albaum, Ahmed Aldhamen, Nolan Ales, Mohammad Alesmail, Abdulelah Alhabeeb, Dania Alhamli, Isehaq Alhuseini, Suhail Alkaabi, Tameem Alkhezzi, Mohamed Alkubaisi, Nasser Allanqawi, Martin Allsbrook, Yousef A. Almohsen, Justin Thomas Almquist, Teeb Alnaji, Yousef A Alnasrallah, Nicholas Alonzi, Meshal Alosaimi, Emeen Alqabani, Mohammad Alrubaie, Reema A. Alsinan, Ava L. Altenbern, Abdullah Altokhais, Saleh A. Alyami, Federico Ameijenda, Hamzi Amer, Meggan Amos, Hunter J. Anderson, Carter Andrew, Jesse C Andringa, Abigail Angwin, Gabreece Van Anne, Andrew Aramians, Camila Villamil Arango, Jack. W. Archibald, Brian A. Arias-Robles, Maryam Aryan, Kevin Ash, Justin Astalos, N. S. Atchley-Rivers, Dakota N. Augenstein, Bryce W. Austin, Abhinav Avula, Matthew C. Aycock, Abdulrahman A. Baflah, Sahana Balaji, Brian Balajonda, Leo M Balcer, James O. Baldwin, David J Banda, Titus Bard, Abby Barmore, Grant M. Barnes, Logan D. W. Barnhart, Kevin M. Barone, Jessica L. Bartman, Claire Bassel, Catalina S Bastias, Batchimeg Bat-Ulzii, Jasleen Batra, Lexi Battist, Joshua Bay, Simone Beach, Sara Beard, Quinn I Beato, Ryan Beattie, Thomas Beatty, Tristan De La Beaujardiere, Jacob N. Beauprez, M. G. Beck, Lily Beck, Simone E. Becker, Braden Behr, Timothy A. Behrer, Joshua Beijer, Brennan J. Belei, Annelene L. Belknap, Aislyn Bell, Caden Bence, Evan Benke, Naomi Berhanu, Zachary D. Berriman-Rozen, Chrisanna Bertuccio, Owen A. Berv, Blaine B. Biediger, Samuel J Biehle, Brennen Billig, Jacob Billingsley, Jayce A. Billman, Connor J. Biron, Gabrielle E. Bisacca, Cassidy A. Blake, Guillermo Blandon, Olivia Blevins, Ethan Blouin, Michal Bodzianowski, Taylor A. Boeyink, Matthew Bondar, Lauren Bone, Alberto Espinosa De Los Monteros Bonilla, William T Borelli, Luke R. Borgerding, Troy Bowen, Christine Boyer, Aidan Boyer, Aidan P. Boyle, Tom Boyne, Donovan Branch, Ariana E. Brecl, David J. Brennan, Alexander J Brimhall, Jennifer L. Brockman, Sarah Brookins, Gabriel T. Brown, Cameron L. Brown, Ryan Brown, Jordi Brownlow, Grant Brumage-Heller, Preston J. Brumley, Samuel Bryan, A. Brzostowicz, Maryam Buhamad, Gigi Bullard-Connor, J. R. Ramirez Bunsow, Annemarie C. Burns, John J. Burritt, Nicholas David Burton, Taylor Burton, Celeste Busch, Dylan R. Butler, B. W. Buxton, Malena C. Toups, Carter C. Cabbage, Breonna Cage, Jackson R. Cahn, Andrew J Campbell, Braden P. Canales, Alejandro R. Cancio, Luke Carey, Emma L. Carillion, Michael Andrew Carpender, Emily Carpenter, Shivank Chadda, Paige Chambers, Jasey Chanders, Olivia M. Chandler, Ethan C. Chang, Mitchell G. Chapman, Logan T. Chapman, S. Chavali, Luis Chavez, Kevin Chen, Lily Chen, Sam Chen, Judy Chen, Jenisha Chhetri, Bradyn Chiles, Kayla M. Chizmar, Katherine E Christiansen, Nicholas A. Cisne, Alexis Cisneros, David B. Clark, Evelyn Clarke, Peter C Clarkson, Alexis R. Clausi, Brooke Cochran, Ryan W. Coe, Aislinn Coleman-Plante, Jake R. Colleran, Zachary Colleran, Curran Collier, Nathaniel A. Collins, Sarah Collins, Jack C. Collins, Michael Colozzi, Aurora Colter, Rebecca A. Cone, Thomas C. Conroy, Reese Conti, Charles J. Contizano, Destiny J. Cool, Nicholas M. Cooper, Jessica S Corbitt, Jonas Courtney, Olivia Courtney, Corben L. Cox, Wilmsen B. Craig, Joshua B. Creany, Anastasia Crews, K. A. Crocker, A. J. Croteau, Christian J. Crow, Zoe Cruse, Avril Cruz, Tyler L. Curnow, Hayden Current, Riley T. Curry, Libby Cutler, Aidan St. Cyr, Frederick M. Dabberdt, Johnston Daboub, Olivia Damgaard, Swagatam Das, Emma A. B. Davis, Elyse Debarros, Sean Deel, Megan E. Delasantos, Tianyue Deng, Zachary Derwin, Om Desai, Kai Dewey, John S. Dias, Kenzie A. Dice, R. Dick, Cyrus A. Dicken, Henry Dietrick, Alexis M. Dinser, Alyssa M. Dixon, Thomas J. Dixon, Helen C. Do, Chris H Doan, Connor Doane, Joshua Dodrill, Timothy Doermer, Lizbeth Montoya Dominguez, J. Dominguez, Emerson N. Domke, Caroline R. Doran, Jackson A. Dorr, Philip Dorricott, Danielle C. Dresdner, Michael Driscoll, Kailer H. Driscoll, Sheridan J. Duncan, Christian Dunlap, Gabrielle M. Dunn, Tien Q. Duong, Tomi Oshima Dupeyron, Peter Dvorak, Andrew East, Andrew N. East, Bree Edwards, Lauren Ehrlich, Sara I. Elbashir, Rasce Engelhardt, Jacob Engelstad, Colin England, Andrew Enrich, Abbey Erickson, Benjamin Erickson, Nathan Evans, Calvin A Ewing, Elizabeth A. Eyeson, Ian Faber, Avery M. Fails, John T Fauntleroy, Kevin Fell, Zitian Feng, Logan D. Fenwick, Nikita Feoktistov, Ryann Fife, John Alfred D. Figueirinhas, Jean-Paul Fisch, Emmalee Fischer, Jules Fischer-White, Aidan F. Fitton, Alexander Fix, Lydia Flackett, Fernando Flores, Aidan Floyd, Leonardo Del Foco, Adeduni Folarin, Aidan E. Forbes, Elise Fortino, Benjamin L. Fougere, Alexandra A. Fowler, Margaret Fox, James M. French, Katherine V. French, Florian G. Frick, Calvin R. Fuchs, Bethany E. S. Fuhrman, Sebastian Furney, Moutamen Gabir, Gabriela Galarraga, Skylar Gale, Keala C. Gapin, A. J. Garscadden, Rachel Gasser, Lily Gayou, Emily E. Gearhart, Jane Geisman, Julianne R. Geneser, Sl Genne, Julia G Gentile, Eleanor Gentry, Jacob D. George, Nathaniel James Georgiades, Phillip Gerhardstein, Clint Gersabeck, Bandar Abu Ghaith, Dorsa Ghiassi, B. C. Giebner, Dalton Gilmartin, Connor B. Gilpatrick, Michael Gjini, Olivia Golden, Nathan T. Golding, C. A. Goldsberry, Angel R. Gomez, Angel A. Gomez, Sean Gopalakrishnan, Mariam Gopalani, Nicholas Gotlib, Alaina S. Graham, Michael J Gray, Alannah H. Gregory, Joshua A. Gregory, Kristyn Grell, Justus Griego, Nicholas F. Griffin, Kyle J. Griffin, Matt Guerrero, Nicole Gunderson, Mutian Guo, E. R. Gustavsson, Grace K. Hach, L. N. Haile, Jessica Haines, Jack J. Mc Hale, Ryder Buchanan Hales, Mark S. Haley, Jacqueline L. Hall, Sean R. Hamilton, Soonhee Han, Tyler Hand, Luke C. Hanley, Connor M Hansen, Joshua A. Hansen, Jonathan Hansson, Tony Yunfei Hao, Nicholas Haratsaris, Isabelle Hardie, Dillon F. Hardwick, Cameron T. Hares, Logan Swous Harris, Coyle M. Harris, Omer Hart, Kyle Hashiro, Elsie Hattendorf, Calder Haubrich, Elijah Hawat, Griffin A. Hayrynen, Danielle A. Heintz, Tim Hellweg, Angel Hernandez, Emanuel Herrera, Robert N. Herrington, Tim Herwig, Troy M. Hesse, Quinn Hiatt, Lea Pearl Hibbard, Imari R. Hicks, Andrew J. Hicks, Nigel Highhouse, Annalise K. Hildebrand, Paula Hill, Hallie Hill, Evan Hintsa, Anna E. Hirschmann, Travis Hitt, Ella Ho, Isabelle J. Hoff, Alex Hoffman, Blake A. Hogen, Linda Horne, Timothy J Houck, Noah H. Howell, E. M. Hrudka, J. Hu, Jianyang Huang, Chenqi Huang, Shancheng Huang, Zachary A. Hudson, Nathan C. Hudson, Tyler J. Huebsch, Owen Hull, Samuel C Hunter, Troy Husted, Abigail P. Hutabarat, Leslie Huynh, Antonio E. Samour Ii, Yolande Idoine, Julia A. Ingram, Taro Iovan, Samuel A. Isert, Antonio Salcido-Alcontar Jr, Thomas Jacobsen, Alan A Jaimes, Connor Jameson, J. R. Jarriel, Sam Jarvis, Josh Jenkins, Alexander V. Jensen, Jacob Jeong, Luke A. Jeseritz, Trevor Jesse, Soo Yeun Ji, Yufan Jiang, Owen Johnson, Matthew Johnson, Sawyer Johnson, Julia Johnston, Braedon Y. Johnston, Olivia M. Jones, M. R. Jones, Tara Jourabchi, Tony A. House Jr., Parker Juels, Sabrina J. H. T. Kainz, Emily Kaiser, Nicolas Ian Kallemeyn, Madison H. Kalmus, Etash Kalra, Margaret Kamenetskiy, Jeerakit Kanokthippayakun, Shaun D. Kapla, Brennan J. Karsh, Caden J. Keating, Morgan A. Kelley, Michael P. Kelley, Nicholas Kelly, James Kelly, Teagan Kelly, Christopher M Kelly, Kellen Kennedy, Cayla J. Kennedy, Forrest Kennedy, Abigail Kennedy, Liana Kerr-Layton, Marilyn Ketterer, Ibraheem A. Khan, Usman Khan, Sapriya Khanal, Jack L. Kiechlin, Dominic Killian, Kevin Kim, Brian T. Kim, Matthew M. Kim, Jake Kim, Aspen Kimlicko, Isabel M Kipp, Hunter B. Kirkpatrick, Natalie Kissner, Emily R. Kite, Olivia R. Kleinhaus, Philip Whiting Knott, Will Koch, Greta Koenig, Emily Koke, Thomas Kokes, Yash S. Kothamdi, Zack Krajnak, Zoe M. Kresek, Dylan Kriegman, Jake E. Kritzberg, Davis J. Krueger, Bartlomiej Kubiak, Kirsten Kuehl, Chrisanne Kuester, Nicolas A. Kuiper, Aman Priyadarshi Kumar, Connor Kuybus, Daniel Kwiatkowski, Quintin Y. Lafemina, Kevin Lacjak, Kyle Lahmers, Antonia Lam, Kalin Landrey, Maxwell B. Lantz, Zachary Larter, Benjamin P. Lau, Megan Lauzon, Rian Lawlor, Tyler Learned, E. C. Lee, Junwon Lee, Adrianna J. Lee, Justin Lee, Alexis Ying-Shan Lee, Christian J Lee, Nathaniel F. Lee, Linzhi Leiker, Dylan Lengerich, Cecilia Leoni, Adrienne R. Lezak, David Y. Li, Isaac Li, Ryan Z. Liao, Bridget Linders, Morgan I Linger, Katherine B. Linnane, Sam Lippincott, Barrett Lister, Shelby D Litton, Nianzi Liu, Steven Y. Liu, Timothy W. Logan, Nathan Londres, Mia C. Lonergan, Emily Lookhoff, N. E. Loomis, Christian Lopez, Justin Loring, Jeffrey Lucca, Dax Lukianow, Nathan M. Cheang, William Macdonald, Claire A. Madonna, Kasey O. Madsen, Tiffany E. Maksimuk, Macguire Mallory, Ryan A. Malone, Blake Maly, Xander R. Manzanares, Aimee S. Maravi, Serafima M. Marcus, Nasreen Marikar, Josie A. Marquez, Mathew J. Marquez, Lauren Marsh, Toni Marsh, Logan S. Martin, Alexa M. Martinez, Jose R. Martinez, Hazelia K. Martinez, Cara Martyr, Mirna Masri, Giorgio Matessi, Adam Izz Khan Mohd Reduan Mathavan, Randi M. Mathieson, Kabir P. Mathur, Graham Mauer, Victoria A. Mayer, Liam Mazzotta, Glen S. Mccammon, Rowan Mcconvey, Tyler Mccormick, Andrew Mccoy, Kelleen Mcentee, Meaghan V. Mcgarvey, Riley M. Mcgill, James K. Mcintyre, Finbar K. Mckemey, Zane Mcmorris, Jesse J. Mcmullan, Ella Mcquaid, Caden Mcvey, Kyle Mccurry, Mateo M. Medellin, Melissa Medialdea, Amar Mehidic, Stella Meillon, Jonah B. Meiselman-Ashen, Sarah Mellett, Dominic Menassa, Citlali Mendez, Patricia Mendoza-Anselmi, Riley Menke, Sarah Mesgina, William J. Mewhirter, Ethan Meyer, Aya M. Miften, Ethan J. Miles, Andrew Miller, Joshua B. Miller, Emily B. Millican, Sarah J. Millican, Dylan P. Mills, Josh Minimo, Jay H. Misener, Alexander J. Mitchell, Alexander Z. Mizzi, Luis Molina-Saenz, Tyler S Moll, Hayden Moll, Maximus Montano, Michael Montoya, Eli Monyek, Jacqueline Rodriguez Mora, Gavin Morales, Genaro Morales, Annalise M. Morelock, Cora Morency, Angel J. Moreno, Remy Morgan, Alexander P. Moss, Brandon A. Muckenthaler, Alexander Mueller, Owen T. Mulcahy, Aria T. Mundy, Alexis A. Muniz, Maxwell J. Murphy, Madalyn C. Murphy, Ryan C. Murphy, Tyler Murrel, Andrew J. Musgrave, Michael S. Myer, Kshmya Nandu, Elena R. Napoletano, Abdulaziz Naqi, Anoothi Narayan, Liebe Nasser, Brenna K Neeland, Molly Nehring, Maya Li Nelson, Lena P. Nguyen, Lena Nguyen, Leonardo Nguyen, Valerie A. Nguyen, Khoa D Nguyen, Kelso Norden, Cooper Norris, Dario Nuñez, Rosemary O. Nussbaum, Cian O’Sullivan, Ian O’Neill, S. H. Oakes, Anand Odbayar, Caleb Ogle, Sean Oishi-Holder, Nicholas Olguin, Nathaniel P. Olson, Jason Ong, Elena N. Opp, Dan Orbidan, Ryan Oros, Althea E. Ort, Matthew Osborn, Austin Osogwin, Grant Otto, Jessica Oudakker, Igor Overchuk, Hannah M. Padgette, Jacqueline Padilla, Mallory Palizzi, Madeleine L. Palmgren, Adler Palos, Luke J. Pan, Nathan L. Parker, Sasha R. Parker, Evan J. Parkinson, Anish Parulekar, Paige J. Pastor, Kajal Patel, Akhil Patel, Neil S. Patel, Samuel Patti, Catherine Patton, Genevieve K. Payne, Matthew P. Payne, Harrison M. Pearl, Charles B. Beck Von Peccoz, Alexander J. Pedersen, Lily M. Pelster, Munisettha E. Peou, J. S. Perez, Freddy Perez, Anneliese Pesce, Audrey J. Petersen, B. Peterson, Romeo S. L. Petric, Joshua Pettine, Ethan J. Phalen, Alexander V. Pham, Denise M. Phan, Callie C Pherigo, Lance Phillips, Justin Phillips, Krista Phommatha, Alex Pietras, Tawanchai P. Pine, Sedique Pitsuean-Meier, Andrew M. Pixley, Will Plantz, William C. Plummer, Kaitlyn E. Plutt, Audrey E. Plzak, Kyle Pohle, Hyden Polikoff, Matthew Pollard, Madelyn Polly, Trevor J. Porter, David Price, Nicholas K. Price, Gale H. Prinster, Henry Austin Propper, Josh Quarderer, Megan S. Quinn, Oliver Quinonez, Devon Quispe, Cameron Ragsdale, Anna L. Rahn, M. Rakhmonova, Anoush K Ralapanawe, Nidhi Ramachandra, Nathaniel Ramirez, Ariana C. Ramirez, Sacha Ramirez, Parker Randolph, Anurag Ranjan, Frederick C Rankin, Sarah Grace Rapaport, Nicholas O Ratajczyk, Mia G. V. Ray, Brian D. Reagan, John C. Recchia, Brooklyn J. Reddy, Joseph Reed, Charlie Reed, Justin Reeves, Eileen N. Reh, Ferin J. Von Reich, Andrea B. Reyna, Alexander Reynolds, Hope Reynolds, Matthew Rippel, Guillermo A. Rivas, Anna Linnea Rives, Amanda M. Robert, Samuel M. Robertson, Maeve Rodgers, Stewart Rojec, Andres C. Romero, Ryan Rosasco, Beth Rossman, Michael Rotter, Tyndall Rounsefell, Charlotte Rouse, Allie C. Routledge, Marc G. Roy, Zoe A. Roy, Ryan Ruger, Kendall Ruggles-Delgado, Ian C. Rule, Madigan Rumley, Brenton M. Runyon, Collin Ruprecht, Bowman Russell, Sloan Russell, Diana Ryder, David Saeb, J. Salazar, Violeta Salazar, Maxwell Saldi, Jose A. Salgado, Adam D. Salindeho, Ethan S. Sanchez, Gustavo Sanchez-Sanchez, Darian Sarfaraz, Sucheta Sarkar, Ginn A. Sato, Carl Savage, Marcus T. Schaller, Benjamin T. Scheck, Jared A. W. Schlenker, Matthew J Schofer, Stephanie H. Schubert, Courtney Schultze, Grace K Schumacher, Kasper Seglem, Lauren Serio, Octave Seux, Hannan Shahba, Callie D. Shannahan, Shajesh Sharma, Nathan Shaver, Timothy Shaw, Arlee K. Shelby, Emma Shelby, Grace Shelchuk, Tucker Sheldrake, Daniel P. Sherry, Kyle Z. Shi, Amanda M. Shields, Kyungeun Shin, Michael C. Shockley, Dominick Shoha, Jadon Shortman, Mitchell Shuttleworth, Lisa Sibrell, Molly G. Sickler, Nathan Siles, H. K. Silvester, Conor Simmons, Dylan M. Simone, Anna Simone, Savi Singh, Maya A. Singh, Madeline Sinkovic, Leo Sipowicz, Chris Sjoroos, Ryan Slocum, Colin Slyne, Korben Smart, Alexandra N. Smith, Kelly Smith, Corey Smith, Elena K. Smith, Samantha M. Smith, Percy Smith, Trevor J Smith, G. L. Snyder, Daniel A. Soby, Arman S. Sohail, William J. Solorio, Lincoln Solt, Caitlin Soon, Ava A Spangler, Benjamin C. Spicer, Ashish Srivastava, Emily Stamos, Peter Starbuck, Ethan K. Stark, Travis Starling, Caitlyn Staudenmier, Sheen L. Steinbarth, Christopher H. Steinsberger, Tyler Stepaniak, Ellie N. Steward, Trey Stewart, T. C. Stewart, Cooper N. Stratmeyer, Grant L. Stratton, Jordin L. Stribling, S. A Sulaiman, Brandon J Sullivan, M. E. Sundell, Sohan N. Sur, Rohan Suri, Jason R. Swartz, Joshua D. Sweeney, Konner Syed, Emi Szabo, Philip Szeremeta, Michael-Tan D. Ta, Nolan C. Tanguma, Kyle Taulman, Nicole Taylor, Eleanor Taylor, Liam C. Taylor, K. E. Tayman, Yesica Tellez, Richard Terrile, Corey D Tesdahl, Quinn N. Thielmann, Gerig Thoman, Daniel Thomas, Jeffrey J. Thomas, William N. Thompson, Noah R. Thornally, Darien P. Tobin, Kelly Ton, Nathaniel J. Toon, Kevin Tran, Bryn Tran, Maedee Trank-Greene, Emily D. Trautwein, Robert B. Traxler, Judah Tressler, Tyson R. Trofino, Thomas Troisi, Benjamin L. Trunko, Joshua K. Truong, Julia Tucker, Thomas D Umbricht, C. H. Uphoff, Zachary T. Upthegrove, Shreenija Vadayar, Whitney Valencia, Mia M. Vallery, Eleanor Vanetten, John D. Vann, Ilian Varela, Alexandr Vassilyev, Nicholas J. Vaver, Anjali A. Velamala, Evan Vendetti, Nancy Ortiz Venegas, Aditya V. Vepa, Marcus T. Vess, Jenna S. Veta, Andrew Victory, Jessica Vinson, Connor Maklain Vogel, Michaela Wagoner, Steven P. Wallace, Logan Wallace, Caroline Waller, Jiawei Wang, Keenan Warble, N. R. D. Ward-Chene, James Adam Watson, Robert J. Weber, Aidan B. Wegner, Anthony A Weigand, Amanda M. Weiner, Ayana West, Ethan Benjamin Wexler, Nicola H. Wheeler, Jamison R. White, Zachary White, Oliver S. White, Lloyd C. Whittall, Isaac Wilcove, Blake C. Wilkinson, John S. Willard, Abigail K. Williams, Sajan Williams, Orion K. Wilson, Evan M. Wilson, Timothy R. Wilson, Connor B. Wilson, Briahn Witkoff, Aubrey M. Wolfe, Jackson R. Wolle, Travis M. Wood, Aiden L. Woodard, Katelynn Wootten, Catherine Xiao, Jianing Yang, Zhanchao Yang, Trenton J. Young, Isabel Young, Thomas Zenner, Jiaqi Zhang, Tianwei Zhao, Tiannie Zhao, Noah Y. Zhao, Chongrui Zhou, Josh J Ziebold, Lucas J. Ziegler, James C. Zygmunt, Jinhua Zhang, and H. J. Lewandowski

Subjects
Solar physics, Solar flares, Astrostatistics distributions, Astrophysics, QB460-466
Abstract

Flare frequency distributions represent a key approach to addressing one of the largest problems in solar and stellar physics: determining the mechanism that counterintuitively heats coronae to temperatures that are orders of magnitude hotter than the corresponding photospheres. It is widely accepted that the magnetic field is responsible for the heating, but there are two competing mechanisms that could explain it: nanoflares or Alfvén waves. To date, neither can be directly observed. Nanoflares are, by definition, extremely small, but their aggregate energy release could represent a substantial heating mechanism, presuming they are sufficiently abundant. One way to test this presumption is via the flare frequency distribution, which describes how often flares of various energies occur. If the slope of the power law fitting the flare frequency distribution is above a critical threshold, α = 2 as established in prior literature, then there should be a sufficient abundance of nanoflares to explain coronal heating. We performed >600 case studies of solar flares, made possible by an unprecedented number of data analysts via three semesters of an undergraduate physics laboratory course. This allowed us to include two crucial, but nontrivial, analysis methods: preflare baseline subtraction and computation of the flare energy, which requires determining flare start and stop times. We aggregated the results of these analyses into a statistical study to determine that α = 1.63 ± 0.03. This is below the critical threshold, suggesting that Alfvén waves are an important driver of coronal heating.

Published
2023
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19. Predicting Short-duration GRB Rates in the Advanced LIGO Volume

Author

Tzvetelina A. Dimitrova, Nathaniel R. Butler, and Srihari Ravi

Subjects
Gamma-rays, Gamma-ray bursts, Gravitational waves, Gravitational wave sources, LIGO, Astrophysics, QB460-466
Abstract

Starting with models for the compact object merger event rate, the short-duration gamma-ray burst (sGRB) luminosity function, and the Swift-BAT detector, we calculate the observed Swift sGRB rate and its uncertainty. Our probabilistic sGRB world model reproduces the observed number distributions in redshift and flux for 123 Swift-BAT detected sGRBs and can be used to predict joint sGRB/LIGO detection rates. We discuss the dependence of the rate predictions on the model parameters and explore how they vary with increasing experimental sensitivity. In particular, the number of bursts in the LIGO volume depends strongly on the parameters that govern sGRB beaming. Our results suggest that nearby sGRBs should be observed to have broader jets on average ( θ _jet ≳ 30°), as compared to the narrowly beamed appearance of cosmological sGRBs due to the detection-selection effect driving the observed jet angle. Assuming all sGRBs are due to compact object mergers, within a D < 200 Mpc aLIGO volume, we predict ${0.18}_{-0.08}^{+0.19}$ sGRB–gravitational wave (GW) associations all sky per year for on-axis events at Swift sensitivities, increasing to ${1.2}_{-0.6}^{+1.9}$ with the inclusion of off-axis events. We explore the consistency of our model with GW170817/GRB 170817A in the context of structured jets. Predictions for future experiments are made.

Published
2023
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