Spitzer Point Source Catalogs of $\sim 300,000$ Stars in Seven Nearby Galaxies

Abstract

We present Spitzer IRAC $3.6-8$um and MIPS $24$um point-source catalogs for seven galaxies: NGC$6822$, M$33$, NGC$300$, NGC$2403$, M$81$, NGC$0247$, and NGC$7793$. The catalogs contain a total of $\sim 300,000$ sources and were created by dual-band selection of sources with $>3\sigma$ detections at both $3.6$um and $4.5$um. The source lists become significantly incomplete near $m_{3.6}=m_{4.5}\simeq 18$. We complement the $3.6$um and $4.5$um fluxes with $5.8$um, $8.0$um and $24$um fluxes or $3\sigma$ upper limits using a combination of PSF and aperture photometry. This catalog is a resource as an archive for studying mid-infrared transients and for planning observations with the James Webb Space Telescope.

22 pages, 8 figures, 8 tables. Accepted for publication in ApJ. Full length Tables 2-8 available at http://asd.gsfc.nasa.gov/Rubab.Khan/Cat7.zip

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• Red Supergiants, Yellow Hypergiants, and Post-RSG Evolution
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• Investigating episodic mass loss in evolved massive stars: I. Spectroscopy of dusty massive stars in ten southern galaxies
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• Spitzer mid-infrared point sources in the fields of nearby galaxies
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• Investigating the metallicity dependence of the mass-loss rate relation of red supergiants
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• Searches for Pulsar-like Candidates from Unidentified Objects in the Third Catalog of Hard Fermi-LAT (3FHL) sources with Machine Learning Techniques
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• Discovery of Five Candidate Analogs for $\eta$Carinae in Nearby Galaxies
• Investigating episodic mass loss in evolved massive stars: III. Spectroscopy of dusty massive stars in three northern galaxies
• A machine-learning photometric classifier for massive stars in nearby galaxies II. The catalog
• The dwarf irregular galaxy NGC 6822. II. Young, intermediate and old stellar populations: comparison between theory and observations
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