Photometry using the Infrared Array Camera on the Spitzer Space Telescope
Joseph L. Hora, Sean Carey, Jason Surace, Massimo Marengo, Patrick, Lowrance, William J. Glaccum, Mark Lacy, William T. Reach, William F., Hoffmann, Pauline Barmby, S. P. Willner, Giovanni G. Fazio, S. Thomas, Megeath, Lori E. Allen, Bidushi Bhattacharya, Manuel Quijada
TL;DR
This paper provides correction methods for point source photometry using Spitzer's IRAC, enabling approximately 2% accuracy by accounting for instrument and calibration characteristics.
Contribution
It introduces specific corrections for IRAC data that improve photometric accuracy, addressing instrument and calibration effects not previously detailed.
Findings
Achieved ~2% relative photometric accuracy with corrections.
Identified key characteristics affecting IRAC photometry.
Provided practical correction procedures for IRAC data.
Abstract
We present several corrections for point source photometry to be applied to data from the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. These corrections are necessary because of characteristics of the IRAC arrays and optics and the way the instrument is calibrated in-flight. When these corrections are applied, it is possible to achieve a ~2% relative photometric accuracy for sources of adequate signal to noise in an IRAC image.
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