Supernova 2014J in M82
Abstract
D. Li, C. Telesco, and C. Packham, University of Florida, on behalf of the CanariCam Science Team, report the first detection at 10 micrometers of the type-Ia supernova 2014J in M82 (cf. CBET 3792). Four 200-s (on-source, excluding overhead) exposures -- two at 10.3 micrometers and two at 11.75 micrometers, were acquired with CanariCam on the 10.4-m Gran Telescopio Canarias (GTC) starting at Feb. 10.12 UT. The supernova is visible at both wavelengths and is the only source detected in the imager field-of-view. The source location in the field-of-view was 3" from the imager center (i.e., the nominal location of the supernova), which is within the absolute pointing accuracy of the telescope that night. The flux densities of the supernova are 7.2 (+/- 2.9) mJy at 10.3 micrometers and 12.4 (+/- 3.0) mJy at 11.75 micrometers. The combined value is 9.8 (+/- 2.1) mJy at a nominal wavelength of 11.0 micrometers. These data were obtained using the CanariCam Guaranteed Time; the GTC is a joint initiative of Spain, the University of Florida, and Mexico. Arto Oksanen, Muurame, Finland, reports the following pre-discovery magnitudes measured by himself for 2014J from CCD images taken by A. Murtovaara (Kiiminki, Finland; 0.25-m f/4 reflector): Jan. 11.670 UT, [16.0 (unfiltered); 17.699, R = 13.0; 17.749, G = 13.6; 17.798, B = 15.03; 18.779, R = 13.3; 18.741, G = 13.1; 18.681, B = 14.44. The supernova is saturated in the R- and G-band images.
- Publication:
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Central Bureau Electronic Telegrams
- Pub Date:
- February 2014
- Bibcode:
- 2014CBET.3807....1L