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VLA and Swift XRT Observations of PTF12os in NGC 5806

ATel #3882; C. J. Stockdale (Marquette University and University of Oklahoma); S. Immler (NASA Goddard Space Flight Center); A. Horesh (California Institute of Technology); M. Kasliwal (OCIW/Princeton); S. D. Ryder (Australian Astronomical Observatory); K. W. Weiler (Computational Physics, Inc.); S. D. Van Dyk (Spitzer Science Center, California Institute of Technology); N. Panagia (Space Telescope Science Institute and Observatory of Catania); F. E. Bauer (Pontificia Universidad Catolica); J. M. Marcaide (University of Valencia); D. Pooley (Eureka Scientific); R. A. Sramek (National Radio Astronomy Observatory); and C. L. Williams (Massachusetts Institute of Technology)
on 25 Jan 2012; 00:01 UT
Credential Certification: Christopher J. Stockdale (chris.stockdale@mu.edu)

Subjects: Radio, X-ray, Supernovae

Referred to by ATel #: 5146

We report the detection of radio emission near the position of the type-IIb supernova PTF2012os (ATEL #3881) with the Karl G. Jansky Very Large Array radio telescope in the DnC configuration: A flux density of 0.44 +/- 0.05 mJy was measured at 5.02 GHz (wavelength 6.0 cm) on 2012 Jan. 22.42 UT. The measured position of the radio emission of R.A. = 14h59m59.s12, Decl. = +01d53m23s.3, equinox 2000.0 is in good agreement with the measured optical position of (ending digits) R.A. = 59.s08, Decl. = 24s.2, equinox 2000.0 (ATEL #3881). Radio observations are continuing. Using 9.4 ks of co-added Swift X-Ray Telescope (XRT) data, obtained on 2012-01-14 (2.0 ks exposure time; PI Kasliwal), 2012-01-16 (2.4 ks; PI Kasliwal), and 2012-01-24 (5.0 ks; PI Immler), no X-ray source is detected at the position of the SN. The PSF, dead-time, and vignetting corrected upper limit to the XRT net count rate is 1.1E-03 cts/s (3-sigma), corresponding to an unabsorbed (0.2-10 keV band) X-ray flux limit of 5.4E-14 erg/cm/cm/s and a luminosity limit of 4.2E39 erg/s for an adopted thermal plasma spectrum with a temperature of kT = 10 keV, a Galactic foreground column density of 4.14E+20 (Dickey & Lockman, 1990, ARAA 28) and a distance of 25.4 Mpc (NED). Swift observations are continuing. The object warrants further study in all wavelength bands.