A Preliminary Search for the Progenitor of the SN Candidate PTF13bvn in the Nearby Galaxy NGC 5806
ATel #5140; I. Arcavi, O. Yaron, A. Gal-Yam (WIS) and Y. Cao (Caltech)
on 17 Jun 2013; 22:50 UT
Credential Certification: Iair Arcavi (iair.arcavi@weizmann.ac.il)
Subjects: Optical, Supernovae
Referred to by ATel #: 5152
We report on possible pre-explosion sources coincident with the position of the SN candidate PTF13bvn (ATel #5137) from archival Hubble Space Telescope (HST) ACS/WFC F435W, F555W, and F814W images from 2005-03-10 UT (HST proposal 10187, PI: Smartt).
We use Palomar 60" R-band images (0.3" pixels) of PTF13bvn taken on July 17 UT to establish the position of this SN candidate.
We find RA = 15:00:00.158, Dec = +01:52:53.21 with an error of 0.16" (calibrated to SDSS).
A few HST pre-explosion sources are close to this error circle (see http://goo.gl/uIyHK ).
Preliminary photometry measurements of these sources, using the DOLPHOT package (Dolphin 2000, PASP, 112, 1383), are shown in the table below.
For specification of the absolute magnitudes we use a distance modulus value of 31.89 (corresponding to a distance of 23.9 Mpc) as provided in the NASA/IPAC Extragalactic Database (NED). We note that there is a 0.15 mag uncertainty stated for this value. No extinction corrections are performed.
Source mag_F555W err S/N mag_F814W err S/N mag_F435W err S/N AbsMag_555 AbsMag_814 AbsMag_435
1a 24.8 0.04 35.3 24.3 0.05 38.1 25.1 0.08 33.8 -7.1 -7.6 -6.8
1b 26.3 0.2 9.1 26.3 0.4 4.9 25.9 0.2 19.8 -5.7 -5.6 -6.1
2 26.2 0.1 12.6 26.7 0.5 5.5 26.1 0.1 16.8 -5.8 -5.2 -5.8
3 26.5 0.2 9.5 26.4 0.2 7.2 26.7 0.2 10.8 -5.4 -5.5 -5.3
4 26.4 0.3 10.3 26.9 0.8 5.3 26.5 0.1 12.5 -5.5 -5.0 -5.5
(an HTML version of this table can be found at
http://goo.gl/yyPSA )
Additional analysis is ongoing.
