The type Ia supernova 2001V in NGC 3987

被引:27
作者
Vinkó, J
Bíró, IB
Csák, B
Csizmadia, S
Derekas, A
Furész, G
Heiner, Z
Sárneczky, K
Sipocz, B
Szabó, G
Szabó, R
Sziládi, K
Szatmáry, K
机构
[1] Univ Szeged, Dept Opt & Quantum Elect, H-6701 Szeged, Hungary
[2] Baja Observ, H-6500 Baja, Hungary
[3] Hungarian Acad Sci, Konkoly Observ Budapest, H-1525 Budapest, Hungary
[4] Univ Szeged, Dept Expt Phys, H-6720 Szeged, Hungary
关键词
stars; supernovae; individual; SN2001V;
D O I
10.1051/0004-6361:20021469
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 +/- 5 Mpc, which is in good agreement with recently determined kinematic distances, based on radial velocity corrected for Virgo-infall and Hubble constant H-0 = 65 km s(-1) Mpc(-1).
引用
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页码:115 / 120
页数:6
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