TY - JOUR
T1 - IMPROVED SPECTROPHOTOMETRIC CALIBRATION of the SDSS-III BOSS QUASAR SAMPLE
AU - Margala, Daniel
AU - Kirkby, David
AU - Dawson, Kyle
AU - Bailey, Stephen
AU - Blanton, Michael
AU - Schneider, Donald P.
N1 - Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved.
PY - 2016/11/10
Y1 - 2016/11/10
N2 - We present a model for spectrophotometric calibration errors in observations of quasars from the third generation of the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey (BOSS) and describe the correction procedure we have developed and applied to this sample. Calibration errors are primarily due to atmospheric differential refraction and guiding offsets during each exposure. The corrections potentially reduce the systematics for any studies of BOSS quasars, including the measurement of baryon acoustic oscillations using the Lyα forest. Our model suggests that, on average, the observed quasar flux in BOSS is overestimated by ∼19% at 3600 Å and underestimated by ∼24% at 10,000 Å. Our corrections for the entire BOSS quasar sample are publicly available.
AB - We present a model for spectrophotometric calibration errors in observations of quasars from the third generation of the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey (BOSS) and describe the correction procedure we have developed and applied to this sample. Calibration errors are primarily due to atmospheric differential refraction and guiding offsets during each exposure. The corrections potentially reduce the systematics for any studies of BOSS quasars, including the measurement of baryon acoustic oscillations using the Lyα forest. Our model suggests that, on average, the observed quasar flux in BOSS is overestimated by ∼19% at 3600 Å and underestimated by ∼24% at 10,000 Å. Our corrections for the entire BOSS quasar sample are publicly available.
KW - cosmology: observations
KW - intergalactic medium
KW - quasars: absorption lines
KW - quasars: general
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U2 - 10.3847/0004-637X/831/2/157
DO - 10.3847/0004-637X/831/2/157
M3 - Article
AN - SCOPUS:84994496254
SN - 0004-637X
VL - 831
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 157
ER -