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IAUC 7093: N IN M31; 1998fc; V1333 Aql

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                                                  Circular No. 7093
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)

     R. Stagni, Astronomy Department, University of Padua, reports
the discovery of an apparent nova in M31 by U. Buonomo and F. Di
Mille with the 1.20-m reflector of the Asiago Astrophysical
Observatory.  The nova was found on V and R CCD images taken on
Jan. 14.8, 15.8, 16.8 (V about 17.8, R about 17.6), and 18.9 UT.
The object is located at R.A. = 0h42m43s.8, Decl. = +41o11'32"
(equinox 2000.0).  V and R CCD images of M31 taken on 1998 Dec.
14.8 and 17.9 show nothing at the position of the nova (limiting
mag V and R about 19.3).

     A. Gal-Yam and D. Maoz, Tel Aviv University, report for the
Wise Observatory Optical Transients Search (see IAUC 6917, 7055)
that a spectrum (range 333-755 nm) of SN 1998fc (IAUC 7082, 7091),
obtained by P. Leisy, O. Hainaut, and T. Sekiguchi with the
European Southern Observatory (ESO) 3.6-m Telescope (+ EFOSC
spectrograph) on Jan. 14, confirms this to be a type-Ia supernova,
a few weeks past maximum brightness.  The estimated supernova
redshift is 0.10, consistent with its being in the galaxy cluster
Abell 403 (z = 0.103).

     C. Chevalier and S. A. Ilovaisky, Observatoire de Haute-
Provence, write:  "We searched CCD frames, taken in the quiescent
state of V1333 Aql = Aql X-1 on 1989 May 8 with the ESO 3.6-m
telescope (+ EFOSC; projected pixel size 0".33), for the line-of-
sight interloper (cf. IAUC 7086).  Three consecutive dithered 5-min
V-band exposures (seeing 1".2) have been analyzed using DAOPHOT
psf-fitting routines.  A clean psf profile was derived from five
nearby isolated stars after three neighbor-removing iterations.
Subtraction of this profile as fitted to the image at the location
of V1333 Aql reveals a residual faint object located 2 +/- 0.5
pixels (0".66 +/- 0".17) to the west of the main object and having
the average stellar FWHM for the frame; it appears on each
individual frame, and its location is consistent with the 0".46
separation between the two images reported on IAUC 7086.  None of
the other stars of comparable brightness shows a similar residue.
We derive V = 22.9 +/- 0.3 for the faint object and V = 19.25 +/-
0.01 for V1333 Aql.  If this residual object is indeed the reported
interloper, then the contamination appears to be slight in the V
band (3-percent level) and suggests a very late-type spectrum for
the interloper."

                      (C) Copyright 1999 CBAT
1999 January 22                (7093)            Daniel W. E. Green

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