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Spitzer IRAC Photometry for Time Series in Crowded Fields

Calchi Novati, S. and Gould, A. and Yee, J. C. and Beichman, C. and Bryden, G. and Carey, S. and Fausnaugh, M. and Gaudi, B. S. and Henderson, C. B. and Pogge, R. W. and Shvartzvald, Y. and Wibking, B. and Zhu, W. and Udalski, A. and Poleski, R. and Pawlak, M. and Szymański, M. K. and Skowron, J. and Mróz, P. and Kozłowski, S. and Wyrzykowski, Ł. and Pietrukowicz, P. and Pietrzyński, G. and Soszyński, I. and Ulaczyk, K. (2015) Spitzer IRAC Photometry for Time Series in Crowded Fields. Astrophysical Journal, 814 (2). Art. No. 92. ISSN 0004-637X.

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We develop a new photometry algorithm that is optimized for the Infrared Array Camera (IRAC) Spitzer time series in crowded fields and that is particularly adapted to faint or heavily blended targets. We apply this to the 170 targets from the 2015 Spitzer microlensing campaign and present the results of three variants of this algorithm in an online catalog. We present detailed accounts of the application of this algorithm to two difficult cases, one very faint and the other very crowded. Several of Spitzer's instrumental characteristics that drive the specific features of this algorithm are shared by Kepler and WFIRST, implying that these features may prove to be a useful starting point for algorithms designed for microlensing campaigns by these other missions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Calchi Novati, S.0000-0002-7669-1069
Yee, J. C.0000-0001-9481-7123
Beichman, C.0000-0002-5627-5471
Carey, S.0000-0002-0221-6871
Gaudi, B. S.0000-0003-0395-9869
Henderson, C. B.0000-0001-8877-9060
Pogge, R. W.0000-0003-1435-3053
Shvartzvald, Y.0000-0003-1525-5041
Udalski, A.0000-0001-5207-5619
Poleski, R.0000-0002-9245-6368
Skowron, J.0000-0002-2335-1730
Mróz, P.0000-0001-7016-1692
Pietrukowicz, P.0000-0002-2339-5899
Ulaczyk, K.0000-0001-6364-408X
Additional Information:© 2015 The American Astronomical Society. Received 2015 August 31; accepted 2015 October 13; published 2015 November 19. We thank J. Ingalls for a useful discussion about PRF fitting with IRAC data. Work by S.C.N., A.G., S.C., J.C.Y., and W.Z. was supported by JPL grant 1500811. Work by Y.S. was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Oak Ridge Associated Universities through a contract with NASA. Work by J.C.Y. was performed under contract with the California Institute of Technology (Caltech)/Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. This work is based (in part) on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to AU.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Postdoctoral ProgramUNSPECIFIED
National Science Centre (Poland)MAESTRO 2014/14/A/ST9/00121
Subject Keywords:gravitational lensing: micro – techniques: photometric
Issue or Number:2
Record Number:CaltechAUTHORS:20151109-142649174
Persistent URL:
Official Citation:S. Calchi Novati et al 2015 ApJ 814 92
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62002
Deposited By: Ruth Sustaita
Deposited On:09 Nov 2015 22:54
Last Modified:09 Mar 2020 13:19

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