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IAUC 6137: 1995E; 1995D; SU Tau

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                                                  Circular No. 6137
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM

     P. Molaro, Trieste Observatory, reports the discovery by
Alessandro Gabrielcic, Agordo, Italy, of an supernova in NGC 2441
(R.A. = 7h52m.2, Decl. = +73o02', equinox 2000.0), the new object
being at mag V about 15 on the CCD discovery frame taken on Feb.
20.85 UT.  SN 1995E is located 7" east and 22" south of the
galaxy's center.  Molaro, C. Boehm, and G. Tessicini further report
that their spectrogram (range 500-900 nm, resolution FWHM about 1.8
nm) taken with the 1.5-m Loiano Observatory telescope (+ BFOSC
spectrograph) on Feb. 21.3 UT shows a strong absorption centered at
619 nm (FWHM 15.4 nm):  "The presence of the absorption feature,
which may be identified with Si II (635.5 nm), and the absence of
pronounced H-alpha emission suggest that this is a type-Ia
supernova.  The expansion velocity amounts to -11000 km/s in the
rest frame of NGC 2441, which is consistent with a type-Ia
supernova close to maximum."

     CCD magnitude from M. Blake, D. Lane, and P. Gray (Burke-
Gaffney Observatory, Saint Mary's University, Halifax, NS):  Feb.
14.149 UT, R = 13.7 +/- 0.1 (comparison stars GSC 0242.0194 and
0242.0810).  H. Mikuz, Ljubljana, Slovenia, reports the following
photometry using glass filters (for coated CCDs; cf. Bessell 1990,
PASP 102, 1181) that match the standard BVRI passbands: Feb. 19.89,
V = 13.49 +/- 0.02, B-V = +0.13 +/- 0.03 (comparison star HR 3834).
CCD magnitude estimate by S. Meister, Bulach, Switzerland:  Feb.
20.99, 13.08 (comparison stars from Guide Star Catalogue).
     Visual magnitude estimates:  Feb. 17.833 UT, 12.8 (T.
Vanmunster, Landen, Belgium); 18.903, 12.8 (P. Schmeer,
Bischmisheim, Germany); 19.90, 13.4 (M. Villi and G. Cortini, Mt.
Colombo, Italy); 21.9, 13.0 (L. Kiss, Szeged, Hungary); 22.083,
12.7 (Schmeer).

     This R CrB-type variable has faded again, as indicated by the
following visual magnitude estimates:  1994 Aug. 14.123 UT, 11.7
(Schmeer); Dec. 15.104, 11.2 (Schmeer); 30.876, 11.5 (Schmeer);
1995 Jan. 5.806, 11.8 (Schmeer); 16.841, 12.3 (Schmeer); 30.918,
12.9 (Schmeer); Feb. 1.914, 13.7 (Schmeer); 19.8, 14.1 (L.
Szentasko, Veresegyhaz, Hungary).

1995 February 22               (6137)            Daniel W. E. Green

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