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IAUC 6782: SNe; C/1997 O1

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                                                 Circular No. 6782
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVAE
     N. Regnault and O. Perdereau, Orsay, on behalf of the EROS
collaboration (cf. IAUC 6605, 6628, 6760), report the discovery of
four apparent supernovae in their systematic search with a 1-deg-
square CCD camera on the Marly 1-m telescope at the European
Southern Observatory (ESO):

SN       Date UT     R.A. (2000.0) Decl.      V          Offset
1997eb   Nov. 19   2h53m00.15  - 3 36 38.1   21      2".4 W, 1".8 N
1997ec   Nov. 20   3h49m07.82  - 1 44 26.7   21      1".8 W, 2".7 N
1997ed   Nov. 22   3h46m56.52  + 0 41 45.4   21      1".2 E, 2".4 N
1997ee   Nov. 23   3h07m24.82  - 3 10 26.7   20.5    3".6 W, 7".8 S

All four supernovae were confirmed on EROS images obtained on Nov.
21, 23, or 24, and also on images taken with the ESO 1.5-m Danish
telescope on Nov. 25 or 27.  SNe 1997eb, 1997ec, and 1997ee were
discovered in frames constructed from the differences between CCD
frames taken on 1997 Oct. 7 and the discovery date; SN 1997ed
appeared in a frame constructed from the difference between CCD
frames taken on 1997 Oct. 24 and Nov. 22.  The limiting magnitude
of the search is about 22, and the supernovae's magnitudes above
are approximate.  Finding charts may be found on the EROS web
server at http://www.lal.in2p3.fr/EROS/SNe/Charts/.


COMET C/1997 O1 (TILBROOK)
     Ephemeris from orbital elements on MPC 30632:

1997/98     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Nov. 28    15 05.25   +21 19.2   2.907   2.332   45.9   17.7   14.0
Dec.  8    15 16.32   +24 16.5   2.892   2.433   53.2   18.9   14.2
     18    15 27.08   +27 36.9   2.868   2.535   60.6   19.8   14.3
     28    15 37.39   +31 22.4   2.840   2.638   68.2   20.2   14.5
Jan.  7    15 47.03   +35 33.8   2.815   2.740   75.5   20.3   14.6
     17    15 55.72   +40 09.4   2.798   2.843   82.5   20.1   14.8
     27    16 03.06   +45 05.7   2.795   2.945   88.9   19.5   14.9
Feb.  6    16 08.50   +50 16.2   2.811   3.047   94.2   18.8   15.1
     16    16 11.24   +55 31.9   2.851   3.149   98.3   18.1   15.3
     26    16 10.11   +60 42.1   2.915   3.250  100.8   17.4   15.4
Mar.  8    16 03.32   +65 35.1   3.005   3.351  101.7   16.9   15.6

                      (C) Copyright 1997 CBAT
1997 December 5                (6782)            Daniel W. E. Green

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