The Type Ia Supernova 2001V in NGC 3987
Abstract
CCD photometry is presented of the type Ia SN 2001V occurred in the edge-on spiral galaxy NGC 3987. The observations made through Johnson-Cousins BVRI filters were collected from Feb. 24 (t = - 8 days, with respect to B-maximum), up to May 5 (t = +62 days). The light curves are analyzed with the revised Multi-Colour Light Curve Shape (MLCS) method (\cite{riess2}) by fitting template vectors to the observed light curves simultaneously. The reddening of SN 2001V is estimated to be E(B-V)=0.05 mag, while the galactic component is E(B-V) = 0.02 mag (Schlegel et al. \cite{sfd}), suggesting that part of the reddening may be due to the ISM in the host galaxy. The Delta parameter in MLCS converged to -0.47 mag, indicating that this SN was overluminous relative to the majority of Type Ia SNe. The inferred distance to its host galaxy, NGC 3987, is 74.5 +/- 5 Mpc, which is in good agreement with recently determined kinematic distances, based on radial velocity corrected for Virgo-infall and Hubble constant H0 = 65 km s-1Mpc-1. Based on observations obtained at German-Spanish Astronomical Centre, Calar Alto, operated by the Max-Planck-Institute for Astronomy, Heidelberg, jointly with the Spanish National Commission for Astronomy.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2003
- DOI:
- 10.1051/0004-6361:20021469
- arXiv:
- arXiv:astro-ph/0210186
- Bibcode:
- 2003A&A...397..115V
- Keywords:
-
- stars: supernovae: individual: SN 2001V;
- Astrophysics
- E-Print:
- 6 pages, 4 figures, accepted in Astronomy and Astrophysics