------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1180 1997 Mar 31 12.09UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.demon.co.uk/astronomer ------------------------------------------------------------------- SUPERNOVAE The High-Z Supernova Search Team reports the discovery of nineteen supernovae on CCD images taken at the Victor Blanco 4-m telescope at Cerro Tololo by B. Schmidt, L. Germany, N.Suntzeff, R. Schommer, A. Clocchiatti, M. Phillips, and A. Diercks. The supernovae were identified by comparing the images taken in Mar. with those obtained on Feb. 12-13, and confirmed by observing at multiple epochs. SN 1997 UT R.A. (2000) Decl. R z type 1997as Mar. 8 8h24m09.46 - 0 48'08.2 22.1 0.47? Ia? 1997at Mar. 8 10 43 37.63 - 0 49 06.5 21.6 1997au Mar. 8 11 50 04.24 +10 45 22.4 23 1997av Mar. 8 10 23 11.24 + 4 13 44.5 21.4 1997aw Mar. 8 10 23 28.21 + 4 07 11.1 22.7 0.6? ? 1997ax Mar. 8 11 18 02.05 + 0 02 10.5 21.8 ? ? 1997ay Mar. 8 11 26 10.34 - 0 36 26.9 23 0.62 ? 1997az Mar. 8 11 23 05.57 - 0 15 55.6 19 0.04 II 1997ba Mar. 8 12 27 38.34 + 0 13 31.0 22.5 1997bb Mar. 8 12 29 00.72 + 0 09 11.3 22.1 1997bc Mar. 8 11 59 08.27 - 0 33 20.6 22.1 0.26? II 1997bd Mar. 8 12 40 28.75 - 0 05 41.8 23.1 1997be Mar. 8 12 40 40.78 - 0 23 21.8 23.1 1997bf Mar. 8 13 41 48.35 + 0 06 12.0 20.4 0.15 ? 1997bg Mar. 8 12 40 39.52 - 0 24 02.7 23.5 0.19 II 1997bh Mar. 8 13 44 35.97 - 0 19 49.3 22.3 0.40 Ia 1997bi Mar. 9 10 11 28.88 -13 12 55.4 23.3 1997bj Mar. 9 10 42 26.65 + 0 01 35.4 21.8 0.35 Ia 1997bk Mar. 9 10 42 02.11 + 0 01 48.21 22.4 0.28? II IAUC 6602 (extract) SUPERNOVA 1997bl IN ANONYMOUS GALAXY Delphine Hardin reports the discovery on Mar. 7 of a supernova (mag V about 21.5), found in the course of a systematic CCD search by the EROS team with the Marly 1-m telescope at the European Southern Observatory. SN 1997bl is located at R.A. = 12h40m21s.0, Decl. = -11o44'39" (equinox 2000.0), which is 2" from the centre of the host galaxy. A spectrogram obtained by M. T. Ruiz on Mar. 16 with the ESO 3.6-m telescope indicates this to be a type-I supernova. IAUC 6605 1991 VH P. Pravec, M. Wolf, and L. Sarounova, Ondrejov Observatory, report: "Our photometric observations of this Apollo object on ten nights during Feb. 27-Mar. 13 revealed the presence of two periods in the lightcurve, 2.6236 +/- 0.0003 and 32.74 +/- 0.05 hr. Analysis of the lightcurve suggests that, like 1994 AW1 (which has a rather similar orbit), 1991 VH may be an eclipsing/occulting binary (Pravec and Hahn 1997, Icarus, in press). Further observations of the eclipse/occultation events from more than one station are desirable. A current ephemeris for the object is on MPC 27570. Approximate ephemerides for the primary and secondary minima are JD 2450518.38 + 1.364E and 2450520.37 + 1.364E, respectively. See http://sunkl.asu.cas.cz/~ppravec/91vh.html for details." IAUC 6607 Guy M Hurst