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1. The DECam Local Volume Exploration Survey Data Release 2

Author

Drlica-Wagner, A, Ferguson, PS, Adamów, M, Aguena, M, Allam, S, Andrade-Oliveira, F, Bacon, D, Bechtol, K, Bell, EF, Bertin, E, Bilaji, P, Bocquet, S, Bom, CR, Brooks, D, Burke, DL, Carballo-Bello, JA, Carlin, JL, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, FJ, Cerny, W, Chang, C, Choi, Y, Conselice, C, Costanzi, M, Crnojević, D, Da Costa, LN, De Vicente, J, Desai, S, Esteves, J, Everett, S, Ferrero, I, Fitzpatrick, M, Flaugher, B, Friedel, D, Frieman, J, García-Bellido, J, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Hartley, WG, Hernandez-Lang, D, Hinton, Hollowood, DL, Honscheid, K, Hughes, AK, Jacques, A, James, DJ, Johnson, MD, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lidman, C, Lin, H, March, M, Marshall, JL, Martínez-Delgado, D, Martínez-Vázquez, CE, Massana, P, Mau, S, McNanna, M, Melchior, P, Menanteau, F, Miller, AE, Miquel, R, Mohr, JJ, Morgan, R, Mutlu-Pakdil, B, Muñoz, RR, Neilsen, EH, Nidever, DL, Nikutta, R, Nilo Castellon, JL, Noël, NED, Ogando, RLC, Olsen, KAG, Pace, AB, Palmese, A, Paz-Chinchón, F, Pereira, MES, Pieres, A, Plazas Malagón, AA, Prat, J, Riley, AH, Rodriguez-Monroy, M, Romer, AK, Roodman, A, Sako, M, Sakowska, JD, Sanchez, E, Sánchez, FJ, Sand, DJ, Santana-Silva, L, Santiago, B, Schubnell, M, Drlica-Wagner, A [0000-0001-8251-933X], Ferguson, PS [0000-0001-6957-1627], Adamów, M [0000-0002-6904-359X], Aguena, M [0000-0001-5679-6747], Bacon, D [0000-0002-2562-8537], Bechtol, K [0000-0001-8156-0429], Bell, EF [0000-0002-5564-9873], Bertin, E [0000-0002-3602-3664], Bocquet, S [0000-0002-4900-805X], Bom, CR [0000-0003-4383-2969], Brooks, D [0000-0002-8458-5047], Carballo-Bello, JA [0000-0002-3690-105X], Carlin, JL [0000-0002-3936-9628], Carnero Rosell, A [0000-0003-3044-5150], Carrasco Kind, M [0000-0002-4802-3194], Carretero, J [0000-0002-3130-0204], Castander, FJ [0000-0001-7316-4573], Cerny, W [0000-0003-1697-7062], Chang, C [0000-0002-7887-0896], Conselice, C [0000-0003-1949-7638], Costanzi, M [0000-0001-8158-1449], Crnojević, D [0000-0002-1763-4128], De Vicente, J [0000-0001-8318-6813], Desai, S [0000-0002-0466-3288], Fitzpatrick, M [0000-0002-9080-0751], Flaugher, B [0000-0002-2367-5049], Frieman, J [0000-0003-4079-3263], García-Bellido, J [0000-0002-9370-8360], Gaztanaga, E [0000-0001-9632-0815], Gerdes, DW [0000-0001-6942-2736], Gruen, D [0000-0003-3270-7644], Gruendl, RA [0000-0002-4588-6517], Gschwend, J [0000-0003-3023-8362], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Honscheid, K [0000-0002-6550-2023], Hughes, AK [0000-0002-1718-0402], Jacques, A [0000-0001-9631-831X], James, DJ [0000-0001-5160-4486], Kuehn, K [0000-0003-0120-0808], Kuropatkin, N [0000-0003-2511-0946], Lahav, O [0000-0002-1134-9035], Li, TS [0000-0002-9110-6163], Lidman, C [0000-0003-1731-0497], Lin, H [0000-0002-7825-3206], Marshall, JL [0000-0003-0710-9474], Martínez-Delgado, D [0000-0003-3835-2231], Martínez-Vázquez, CE [0000-0002-9144-7726], Massana, P [0000-0002-8093-7471], Mau, S [0000-0003-3519-4004], McNanna, M [0000-0001-5435-7820], Melchior, P [0000-0002-8873-5065], Menanteau, F [0000-0002-1372-2534], Miller, AE [0000-0002-7483-7327], Miquel, R [0000-0002-6610-4836], Mohr, JJ [0000-0002-0810-5558], Morgan, R [0000-0002-7016-5471], Mutlu-Pakdil, B [0000-0001-9649-4815], Neilsen, EH [0000-0002-7357-0317], Nidever, DL [0000-0002-1793-3689], Nikutta, R [0000-0002-7052-6900], Nilo Castellon, JL [0000-0002-8282-469X], Ogando, RLC [0000-0003-2120-1154], Olsen, KAG [0000-0002-7134-8296], Pace, AB [0000-0002-6021-8760], Palmese, A [0000-0002-6011-0530], Paz-Chinchón, F [0000-0003-1339-2683], Pieres, A [0000-0001-9186-6042], Plazas Malagón, AA [0000-0002-2598-0514], Riley, AH [0000-0001-5805-5766], Romer, AK [0000-0002-9328-879X], Roodman, A [0000-0001-5326-3486], Sako, M [0000-0003-2764-7093], Sakowska, JD [0000-0002-1594-1466], Sanchez, E [0000-0002-9646-8198], Sánchez, FJ [0000-0003-3136-9532], Sand, DJ [0000-0003-4102-380X], Santana-Silva, L [0000-0003-3402-6164], Schubnell, M [0000-0001-9504-2059], and Apollo - University of Cambridge Repository

Subjects
astro-ph.GA, astro-ph.CO, astro-ph.IM
Abstract

We present the second public data release (DR2) from the DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new DECam observations with archival DECam data from the Dark Energy Survey, the DECam Legacy Survey, and other DECam community programs. DELVE DR2 consists of ~160,000 exposures that cover >21,000 deg^2 of the high Galactic latitude (|b| > 10 deg) sky in four broadband optical/near-infrared filters (g, r, i, z). DELVE DR2 provides point-source and automatic aperture photometry for ~2.5 billion astronomical sources with a median 5{\sigma} point-source depth of g=24.3, r=23.9, i=23.5, and z=22.8 mag. A region of ~17,000 deg^2 has been imaged in all four filters, providing four-band photometric measurements for ~618 million astronomical sources. DELVE DR2 covers more than four times the area of the previous DELVE data release and contains roughly five times as many astronomical objects. DELVE DR2 is publicly available via the NOIRLab Astro Data Lab science platform.

Published
2022

2. Overview of the DESI Legacy Imaging Surveys

Author

Dey, A, Schlegel, DJ, Lang, D, Blum, R, Burleigh, K, Fan, X, Findlay, JR, Finkbeiner, D, Herrera, D, Juneau, S, Landriau, M, Levi, M, McGreer, I, Meisner, A, Myers, AD, Moustakas, J, Nugent, P, Patej, A, Schlafly, EF, Walker, AR, Valdes, F, Weaver, BA, Yeche, C, Zou, H, Zhou, X, Abareshi, B, Abbott, TMC, Abolfathi, B, Aguilera, C, Allen, L, Alvarez, A, Annis, J, Aubert, M, Bell, EF, BenZvi, SY, Bielby, RM, Bolton, AS, Briceno, C, Buckley-Geer, EJ, Butler, K, Calamida, A, Carlberg, RG, Carter, P, Casas, R, Castander, FJ, Choi, Y, Comparat, J, Cukanovaite, E, Delubac, T, DeVries, K, Dey, S, Dhungana, G, Dickinson, M, Ding, Z, Donaldson, JB, Duan, Y, Duckworth, CJ, Eftekharzadeh, S, Eisenstein, DJ, Etourneau, T, Fagrelius, PA, Farihi, J, Fitzpatrick, M, Font-Ribera, A, Fulmer, L, Gansicke, BT, Gaztanaga, E, George, K, Gerdes, DW, Gontcho, SGA, Green, G, Guy, J, Harmer, D, Hernandez, M, Honscheid, K, Lijuan, Huang, James, D, Jannuzi, BT, Jiang, L, Joyce, R, Karcher, A, Karkar, S, Kehoe, R, Kneib, J-P, Kueter-Young, A, Lan, T-W, Lauer, T, Guillou, LL, Suu, ALV, Lee, JH, Lesser, M, Li, TS, Mann, JL, Marshall, B, Martínez-Vázquez, CE, Martini, P, Bourboux, HDMD, McManus, S, Menard, B, Metcalfe, N, Muñoz-Gutiérrez, A, Najita, J, Napier, K, Narayan, G, Newman, JA, Nie, J, Nord, B, Norman, DJ, Olsen, KAG, Paat, A, Palanque-Delabrouille, N, Peng, X, Poppett, CL, Poremba, MR, Prakash, A, Rabinowitz, D, Raichoor, A, Rezaie, M, Robertson, AN, Roe, NA, Ross, AJ, Ross, NP, Rudnick, G, Safonova, S, Saha, A, Sanchez, FJ, Schweiker, H, Scott, A, Seo, H-J, Shan, H, Silva, DR, Soto, C, Sprayberry, D, Staten, R, Stillman, CM, Stupak, RJ, Summers, DL, Tie, SS, Tirado, H, Vargas-Magana, M, Vivas, AK, Wechsler, RH, Williams, D, Yang, J, Yang, Q, Yapici, T, Zaritsky, D, Zenteno, A, Zhang, K, Zhang, T, Zhou, R, and Zhou, Z

Subjects
astro-ph.IM
Abstract

The DESI Legacy Imaging Surveys are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing-Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will jointly image ~14,000 square degrees of the extragalactic sky visible from the northern hemisphere in three optical bands (g, r, and z) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contiguous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamic observing that results in a survey of nearly uniform depth. In addition to calibrated images, the project is delivering an inference-based catalog which includes photometry from the grz optical bands and from four mid-infrared bands (at 3.4um, 4.6um, 12um and 22um) observed by the Wide-field Infrared Survey Explorer (WISE) satellite during its full operational lifetime. The project plans two public data releases each year. All the software used to generate the catalogs is also released with the data. This paper provides an overview of the Legacy Surveys project.

Published
2018

3. DELVE-ing into the Jet: A Thin Stellar Stream on a Retrograde Orbit at 30 kpc

Author

P. S. Ferguson, N. Shipp, A. Drlica-Wagner, T. S. Li, W. Cerny, K. Tavangar, A. B. Pace, J. L. Marshall, A. H. Riley, M. Adamów, J. L. Carlin, Y. Choi, D. Erkal, D. J. James, Sergey E. Koposov, N. Kuropatkin, C. E. Martínez-Vázquez, S. Mau, B. Mutlu-Pakdil, K. A. G. Olsen, J. D. Sakowska, G. S. Stringfellow, B. Yanny, Ferguson, PS [0000-0001-6957-1627], Shipp, N [0000-0003-2497-091X], Drlica-Wagner, A [0000-0001-8251-933X], Li, TS [0000-0002-9110-6163], Cerny, W [0000-0003-1697-7062], Tavangar, K [0000-0001-6584-6144], Pace, AB [0000-0002-6021-8760], Marshall, JL [0000-0003-0710-9474], Riley, AH [0000-0001-5805-5766], Adamów, M [0000-0002-6904-359X], Carlin, JL [0000-0002-3936-9628], Choi, Y [0000-0003-1680-1884], James, DJ [0000-0001-5160-4486], Koposov, SE [0000-0003-2644-135X], Kuropatkin, N [0000-0003-2511-0946], Martínez-Vázquez, CE [0000-0002-9144-7726], Mau, S [0000-0003-3519-4004], Mutlu-Pakdil, B [0000-0001-9649-4815], Olsen, KAG [0000-0002-7134-8296], Sakowska, JD [0000-0002-1594-1466], Stringfellow, GS [0000-0003-1479-3059], Yanny, B [0000-0002-9541-2678], Apollo - University of Cambridge Repository, Ferguson, P. S. [0000-0001-6957-1627], Shipp, N. [0000-0003-2497-091X], Drlica-Wagner, A. [0000-0001-8251-933X], Li, T. S. [0000-0002-9110-6163], Cerny, W. [0000-0003-1697-7062], Tavangar, K. [0000-0001-6584-6144], Pace, A. B. [0000-0002-6021-8760], Marshall, J. L. [0000-0003-0710-9474], Riley, A. H. [0000-0001-5805-5766], Adamów, M. [0000-0002-6904-359X], Carlin, J. L. [0000-0002-3936-9628], Choi, Y. [0000-0003-1680-1884], James, D. J. [0000-0001-5160-4486], Koposov, Sergey E. [0000-0003-2644-135X], Kuropatkin, N. [0000-0003-2511-0946], Martínez-Vázquez, C. E. [0000-0002-9144-7726], Mau, S. [0000-0003-3519-4004], Mutlu-Pakdil, B. [0000-0001-9649-4815], Olsen, K. A. G. [0000-0002-7134-8296], Sakowska, J. D. [0000-0002-1594-1466], Stringfellow, G. S. [0000-0003-1479-3059], and Yanny, B. [0000-0002-9541-2678]

Subjects
astro-ph.GA, FOS: Physical sciences, Astronomy and Astrophysics, 5109 Space Sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxies and Cosmology, Space and Planetary Science, Clinical Research, Astrophysics of Galaxies (astro-ph.GA), Computer Science::Multimedia, 51 Physical Sciences, Astrophysics::Galaxy Astrophysics
Abstract

We perform a detailed photometric and astrometric analysis of stars in the Jet stream using data from the first data release of the DECam Local Volume Exploration Survey (DELVE) DR1 and \emph{Gaia} EDR3. We discover that the stream extends over $\sim 29 ^{\circ}$ on the sky (increasing the known length by $18^{\circ}$), which is comparable to the kinematically cold Phoenix, ATLAS, and GD-1 streams. Using blue horizontal branch stars, we resolve a distance gradient along the Jet stream of 0.2 kpc/deg, with distances ranging from $D_\odot \sim 27-34$ kpc. We use natural splines to simultaneously fit the stream track, width, and intensity to quantitatively characterize density variations in the Jet stream, including a large gap, and identify substructure off the main track of the stream. Furthermore, we report the first measurement of the proper motion of the Jet stream and find that it is well-aligned with the stream track suggesting the stream has likely not been significantly perturbed perpendicular to the line of sight. Finally, we fit the stream with a dynamical model and find that the stream is on a retrograde orbit, and is well fit by a gravitational potential including the Milky Way and Large Magellanic Cloud. These results indicate the Jet stream is an excellent candidate for future studies with deeper photometry, astrometry, and spectroscopy to study the potential of the Milky Way and probe perturbations from baryonic and dark matter substructure., 19 pages, 10 figures, Accepted in ApJ

Published
2022
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