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Possible Spitzer Counterpart of PSN J01364816+1545310

ATel #5230; Rubab Khan (Ohio State University)
on 27 Jul 2013; 23:26 UT
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Infra-Red, Supernovae

Referred to by ATel #: 5237, 5243, 5264

We report the detection of a bright mid-IR source coincident with the position of PSN J01364816+1545310 (ATel #5228, #5229) in the nearby galaxy NGC 628 (M74) in archival images obtained with Spitzer/IRAC on July 28, 2004 (PI: R. Kennicutt). The candidate mid-IR progenitor is located at RA=01:36:48.21, DEC=+15:45:30.64, 0.8" from the reported location of the transient. It has an IRAC1 (3.6um) band magnitude of 18.18 and IRAC2 (4.5um) band magnitude of 18.06. This translates to 0.015 mJy and 0.0105 mJy respectively, and implies luminosities of ~30,000 and ~17,000 solar luminosities for a distance of ~9 Mpc.

The Spitzer 4.5um image is posted at http://www.astronomy.ohio-state.edu/~khan/NGC628_SN/ngc628_SN.jpg

The 2" red circle is centered on the transient location and the 1" blue circle is centered on the Spitzer source.