The Type Ia Supernova 2001V in NGC 3987

Free access article

Issue		A&A Volume 397, Number 1, January I 2003


Page(s)		115 - 120
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20021469

A&A 397, 115-120 (2003)
DOI: 10.1051/0004-6361:20021469

The Type Ia Supernova 2001V in NGC 3987

J. Vinkó^{1, 2}, I. B. Bíró³, B. Csák^{4, 2}, Sz. Csizmadia⁵, A. Derekas^{4, 2}, G. Furész^{4, 2}, Z. Heiner^{1, 2}, K. Sárneczky^{1, 2, 6}, B. Sipocz², Gy. Szabó^{4, 2, 6}, R. Szabó⁵, K. Sziládi^{1, 2, 6} and K. Szatmáry⁴

¹ Department of Optics & Quantum Electronics, University of Szeged, PO Box 406, Szeged, 6701 Hungary
² Guest Observer, Piszkésteto Station, Konkoly Observatory, Hungary
³ Baja Observatory, PO Box 766, Baja, 6500 Hungary
⁴ Department of Experimental Physics, University of Szeged, Dóm tér 9., Szeged, 6720 Hungary
⁵ Konkoly Observatory of the Hungarian Academy of Sciences, PO Box 67, Budapest, 1525 Hungary
⁶ Visiting Astronomer, German-Spanish Astronomical Centre, Calar Alto, Spain

(Received 2 July 2002 / Accepted 7 October 2002)

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 (Riess et al. 1998) 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. 1998), 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 $74.5 \pm 5$ 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.

Key words: stars: supernovae: individual: SN 2001V

Offprint request: J. Vinkó, vinko@physx.u-szeged.hu

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