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IAUC 7585: 2001V; 2001T; C/2001 C5

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IAUC number 

                                                  Circular No. 7585
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2001V IN NGC 3987
     S. Jha, T. Matheson, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report the discovery of a
supernova (mag 16) by P. Berlind on Feb. 19.38 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph).
Concurrent images taken with the Observatory's 1.2-m telescope (+
4Shooter) yield the following precise position for SN 2001V:  R.A.
= 11h57m24s.93, Decl. = +25o12'09".0 (equinox 2000.0, uncertainty
+/- 0".3), which is 52" east and 28" north of the host galaxy's
nucleus.  The supernova spectrum exhibits a blue continuum with
broad features, identifying this as a type-Ia supernova well before
maximum light.  Adopting the NASA/IPAC Extragalactic Database (NED)
recession velocity of 4502 km/s for the host galaxy yields an
expansion velocity for the supernova of 14 000 km/s, measured with
the Si II (rest 635.5 nm) feature.


SUPERNOVA 2001T IN MCG -02-37-6
     Matheson, Jha, Challis, and Kirshner also report that a
spectrum of SN 2001T (cf. IAUC 7581), obtained by Berlind (as
above) on Feb. 19.49 UT, shows it to be a type-II supernova near
maximum light.  The spectrum consists of a blue continuum with
superposed P-Cyg lines of hydrogen and Ca II.  Adopting the NED
recession velocity of 4167 km/s for the host galaxy, the expansion
velocity derived from the minimum of the H-beta line is 7600 km/s.


COMET C/2001 C5 (SOHO)
     Further to IAUC 7582, D. Hammer reports his measurements for a
comet found by M. Oates on SOHO website images.  C/2001 C5 was
visible in both the C3 and C2 coronagraphs, and D. Biesecker
provides the following post-perihelion V magnitudes from the C2
data (the C3 data being poor due to vignetting):  Feb. 13.854, 5.4;
13.896, 5.0; 13.938, 5.0; 13.979, 4.9; 14.021, 4.9; 14.064, 4.9;
14.104, 5.3; 14.146, 5.6; 14.163, 6.3; 14.188, 7.4.  The reduced
observations and retrograde parabolic orbital elements (T = 2001
Feb. 13.3 TT, q = 0.026 AU, i = 166.3 deg; a direct orbit solution
is also possible) by B. G. Marsden appear on MPEC 2001-D07.

    Comet         2001 UT           R.A. (2000) Decl.
    C/2001 C5     Feb. 13.721      21 41.2   -13 25

                      (C) Copyright 2001 CBAT
2001 February 20               (7585)            Daniel W. E. Green

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