Updated Coordinates for SN2014J
ATel #5821; Space Telescope Science Institute
on 27 Jan 2014; 21:32 UT
Credential Certification: Linda Smith (lsmith@stsci.edu)
Subjects: Optical, Supernovae
Updated Coordinates for SN2014J
L.J. Smith, L. Strolger, M. Mutchler, L. Ubeda, K. Levay (STScI)
In ATel #5789 (Tendulkar et al.), coordinates for SN2014J are given with respect to the HST Heritage image (hlsp_heritage_hst_acs-wfc_m82_f814w_v1_sci_sci.fits). This dataset was obtained in 2006 and the absolute astrometry is based on Guide Star Catalog 1, which can have errors up to 1 arcsec.
To check the coordinates reported in ATel #5789, the four F814W exposures for the single pointing covering the supernova were reprocessed through CALACS and Astrodrizzle. The WCS of this image was then corrected using 2MASS to give absolute astrometry.
The resulting F814W image is available at http://archive.stsci.edu/pub/hlsp/m82/version2
We find a 0.842 arcsec offset from the coordinates given in ATel #5789.
The updated SN2014J coordinates (J2000) are 09:55:42.121 +69:40:25.88.
