SMC-Last Extracted Photometry

T. a. Kuchar, G. c. Sloan, D. r. Mizuno, Kathleen e. Kraemer, Martha L. Boyer, Martin a. t. Groenewegen, Olivia C. Jones, F. Kemper, Iain Mcdonald, Joana m. Oliveira, Marta Sewiło, Sundar Srinivasan, Jacco th. Van loon, Albert Zijlstra

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We present point-source photometry from the Spitzer Space Telescope's final survey of the Small Magellanic Cloud (SMC). We mapped nearly 30 deg2 in two epochs in 2017, with the second extending to early 2018 at 3.6 and 4.5 μm using the Infrared Array Camera. This survey duplicates the footprint from the SAGE-SMC program in 2008. Together, these surveys cover a nearly 10 yr temporal baseline in the SMC. We performed aperture photometry on the mosaicked maps produced from the new data. We did not use any prior catalogs as inputs for the extractor in order to be sensitive to any moving objects (e.g., foreground brown dwarfs) and other transient phenomena (e.g., cataclysmic variables or FU Ori–type eruptions). We produced a point-source catalog with high-confidence sources for each epoch as well as a combined-epoch catalog. For each epoch and the combined-epoch data, we also produced a more complete archive with lower-confidence sources. All of these data products will be made available to the community at the Infrared Science Archive.
Original languageEnglish
Article number149
JournalThe Astronomical Journal
Issue number4
Early online date11 Mar 2024
Publication statusPublished - 1 Apr 2024


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