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Your search keyword '"Gabriel Brammer"' showing total 2 results
Start Over Author "Gabriel Brammer" Journal publications of the astronomical society of the pacific
2 results on '"Gabriel Brammer"'

1. Light and Color Curves of Six Field RR Lyrae Variable Stars

Author

Rodolfo Montez, Andrew C. Layden, Gabriel Brammer, Donald Hoard, Shadrian Holmes, Jorge Cuadra, Kathy L. Cooksey, Alicia S. Day, and Erika Labbe

Subjects
Physics, Field (physics), Extinction (astronomy), Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, RR Lyrae variable, Light curve, Stars, Amplitude, Space and Planetary Science, Range (statistics), Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present light curves in the B, V, and I passbands for six field RR Lyrae stars. We derive the stars' intensity‐mean magnitudes, light amplitudes, and colors at minimum light. We compare the latter with measurements from other variables and discuss the use of (V−I) color at minimum light as a tool for measuring interstellar reddening. From 15 stars, we find the mean dereddened RR Lyrae color at minimum light to be (V−I)0 = 0.57 mag. The rms scatter of 0.025 mag indicates the precision of this value over a wide range of metallicities and pulsation periods.

Published
2002
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2. Complete IRAC Mapping of the CFHTLS-DEEP, MUSYC, and NMBS-II Fields.

Author

Marianna Annunziatella, Danilo Marchesini, Mauro Stefanon, Adam Muzzin, Daniel Lange-Vagle, Ryan Cybulski, Ivo Labbe, Erin Kado-Fong, Rachel Bezanson, Gabriel Brammer, David Herrera, Britt Lundgren, Z. Cemile Marsan, Mario Nonino, Gregory Rudnick, Paolo Saracco, Tal Tomer, Frank Valdes, Remco F. J. van der Burg, and Pieter van Dokkum

Subjects
DATA reduction, INFRARED array detectors
Abstract

The IRAC mapping of the NMBS-II fields program is an imaging survey at 3.6 and 4.5 μm with the Spitzer Infrared Array Camera (IRAC). The observations cover three Canada–France–Hawaii Telescope Legacy Survey Deep (CFHTLS-D) fields, including one also imaged by AEGIS, and two MUSYC fields. These are then combined with archival data from all previous programs into deep mosaics. The resulting imaging covers a combined area of about 3 deg2, with at least ∼2 hr integration time for each field. In this work, we present our data reduction techniques and document the resulting coverage maps at 3.6 and 4.5 μm. All of the images are W-registered to the reference image, which is either the z-band stack image of the 25% best-seeing images from the CFHTLS-D for CFHTLS-D1, CFHTLS-D3, and CFHTLS-D4, or the K-band images obtained at the Blanco 4-m telescope at CTIO for MUSYC1030 and MUSYC1255. We make all images and coverage maps described here publicly available via the Spitzer Science Center. [ABSTRACT FROM AUTHOR]

Published
2018
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