IAUC 7668: Prob. SN IN Anon GALAXY; V2274 Cyg = N Cyg 2001

The followingInternational Astronomical Union Circularmay be linked-to from your own Webpages, but mustnot otherwise be redistributed (seethese notes on the conditions underwhich circulars are made available on our WWW site).

---

ReadIAUC 7667 ReadIAUC 7669

ViewIAUC 7668 in.dvi or.ps format.

IAUC number

---

                                                  Circular No. 7668Central Bureau for Astronomical TelegramsINTERNATIONAL ASTRONOMICAL UNIONMailstop 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 0081-0304Phone 617-495-7440/7244/7444 (for emergency use only)PROBABLE SUPERNOVA IN ANONYMOUS GALAXY     P. Challis, Harvard-Smithsonian Center for Astrophysics, onbehalf of the High-Z Supernova Search Team (cf.IAUC 6160,6646),using methods inspired by the SNAZ (SuperNovae at High Z) Team atthe Space Telescope Science Institute,  reports the discovery of aprobable supernova on WFPC2 images taken with the Hubble SpaceTelescope.  The apparent supernova was found by differencing imagestaken on June 20 UT with earlier WFPC2 data taken over six epochsduring Nov.-Dec. 2000.  The new object appears in five filtersduring the 3-orbit (about 5-hr) observation.  It does not exhibit the parallaxmotion of a solar-system object.  The supernova is offset 0".4southeast of the center of an elongated faint (F814W magnitudeabout 24.1) galaxy.  The position of the new object is R.A. =2h30m17s.62, Decl. = +1 03'56".4 (equinox 2000.0; uncertainty +/-0".04).  A finder chart is available athttp://cfa-www.harvard.edu/cfa/oir/Research/supernova/HighZ.html.Photometry from the WFPC2 data yields the following supernovamagnitudes:  [F450W] = 26.00 +/- 0.30, [F555W] = 25.07 +/- 0.16,[F675W] = 23.91 +/- 0.06, [F814W] = 23.59 +/- 0.06, [F850LP] =23.45 +/- 0.16.  Further observations with HST will be coordinatedby the SNAZ Team.  Groundbased observations should be possible inthe R, I, and Z bands.V2274 CYGNI = NOVA CYGNI 2001     N. N. Samus, Institute of Astronomy, Moscow, informs us thatthe designation V2274 Cyg has been given to this nova (cf.IAUC7666).     T. Kato, Kyoto University, reports the following prediscoverylimiting magnitudes (nova not visible):  May 12.775 UT, [14.0 (A.Takao, Kitakyushu, Japan; unfiltered CCD); 19.665, [11.9 (K.Kanatsu, Matsue, Shimane, Japan; T-Max 400 film); June 15.621,[11.9 (Kanatsu); July 12.613, [11.6 (Kanatsu).     E. O. Waagen, AAVSO, reports the following additional CCD Vmagnitudes in the AAVSO International Database:  July 19.072 UT,12.2 (A. Price, Waltham, MA); 19.090, 11.95 (Walker); 19.138, 11.87(Walker); 19.159, 11.93 (Walker); 19.292, 11.86 (S. O'Connor,Montreal, QC); 20.058, 11.88 (Walker); 20.086, 11.81 (Walker);20.096, 11.87 (Walker); 20.102, 12.2 (Price); 20.262, 12.0 (R.Royer, Lakewood, CA).                      (C) Copyright 2001 CBAT2001 July 20                   (7668)            Daniel W. E. Green

---

ReadIAUC 7667 ReadIAUC 7669

ViewIAUC 7668 in.dvi or.ps format.

---

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