Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7629: 2001br; P/2001 K1; AL Com

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 7628 SEARCH Read IAUC 7630

View IAUC 7629 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7629
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 2001br IN UGC 11260
     G. M. Hurst, "The Astronomer", Basingstoke, England, reports the
probable discovery by M. Armstrong, Rolvenden, Kent, of a supernova at
R.A. = 18h30m25s.55, Decl. = +34o06'13".0 (equinox 2000), 2" east and 2"
north of the nucleus of UGC 11260.  Unfiltered CCD magnitudes were 16.6
on May 13.989, 16.3 on May 19.036 and 16.0 on May 21.117 UT.  The object was
confirmed by T. Boles, Coddenham, Suffolk, on May 20.059 UT.  The object,
although quite close to the nucleus of the galaxy, does not appear to be on
master patrol images by Armstrong on 2000 Nov. 12, 2001 Apr. 19, May 3
and May 8 (limiting mag 19), or on one by Boles on 2001 Apr. 29.

     T. Matheson, S. Jha, P. Challis and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum of SN 2001br, obtained
by K. Rines on May 21.44 UT with the F. L. Whipple Observatory 1.5-m
telescope (+ FAST spectrograph), shows it to be a type Ia supernova
near maximum light.  Adopting the NASA/IPAC Extragalactic Database
recession velocity of 6184 km/s for the host galaxy, the supernova
expansion velocity is about 13 500 km/s for Si II (rest 635.5 nm).  The
spectral feature age of the supernova (Riess et al. 1997, A.J. 114,
722) is 1 +/- 2 days before maximum light.


COMET P/2001 K1 (NEAT)
     S. Pravdo, E. Helin and K. Lawrence, Jet Propulsion Laboratory, report
the discovery of a comet by NEAT on CCD images taken with the 1.2-m
reflector at Haleakala on May 20.5 and 21.4 UT.  M. Tichy and M. Kocer, Klet
Observatory, note that the object had a 14" coma on May 21.9.  P. Pravec
and P. Kusnirak, Ondrejov Observatory, report a 0'.3 coma and a 0'.8 tail
in p.a. 290 deg on May 21.9.  T. B. Spahr, Minor Planet Center, has identified
asteroidal observations of the object in LONEOS and LINEAR data back to
Feb. 2.  Full details are on MPEC 2001-K17.

     2001 UT             R.A. (2000) Decl.        m1
     May  20.50060   15 27 11.52   - 4 27 55.6   18.7


AL COMAE BERENICES
     J. Mattei, American Association of Variable Star Observers, reports
that this cataclysmic variable is currently having a rare outburst (cf. IAUC
2760, 6155).  Visual magnitude estimates: May 18.28 UT, [13.9 (P. Abbott,
Leduc, AB, Canada); 18.87, 12.1 (J. Gunther, St. Trinit, France); 19.90,
12.7 (P. Schmeer, Bischmisheim, Germany); 20.92, 12.6 (Schmeer).

                      (C) Copyright 2001 CBAT
2001 May 21                    (7629)              Brian G. Marsden

Read IAUC 7628 SEARCH Read IAUC 7630

View IAUC 7629 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!