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IAUC 8498: Poss. SN IN NGC 4656; V382 Nor; CATACLYSMIC Var IN Pyx; C/2005 C1, C/2005 C2, C/2005 C3,, C/2005 C4

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IAUC number 

                                                  Circular No. 8498
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


POSSIBLE SUPERNOVA IN NGC 4656
     N. Elias-Rosa, S. Benetti, E. Cappellaro, and M. Dolci,
Istituto Nazionale di Astrofisica; and A. Pastorello, Max-Planck-
Institut, report that a spectrum of the new object in NGC 4656 (cf.
IAUC 8497), obtained on Mar. 23.9 UT by W. Boschin and N. Pinilla
Alonso with the TNG telescope (+ Dolores; range 350-800 nm,
resolution 1.2 nm), shows a relatively blue continuum dominated by
a narrow (730 km/s) H_alpha emission, while the other Balmer lines
are not visible.  The broader component of the H_alpha line often
seen in type-IIn supernovae is not apparent.  The spectrum also
shows narrow (1.5-nm) absorptions due to H and K of Ca II.  This
object may be a superoutburst of a luminous blue variable rather
than a true supernova, similar to SN 1997bs (IAUC 6627; Van Dyk et
al. 2000, PASP 112, 1532) and 1999bw (IAUC 7152).


V382 NORMAE
     L. A. G. Monard revises his position for V382 Nor (cf. IAUC
8497) to R.A. = 16h19m44s.74, Decl. = -51o34'53".1 (equinox 2000.0).
Visual magnitude estimates:  Mar. 20.195 UT, 10.1 (R. Y. Shida, Sao
Paulo, Brazil); 20.880, 10.1 (A. Pearce, Nedlands, W. Australia);
22.615, 10.2 (Pearce).


CATACLYSMIC VARIABLE IN PYXIS
     Corrigendum.  On IAUC 8495, line 6, FOR  H. Haseda, READ
K. Haseda,
     Visual magnitude estimate from A. Pearce, Nedlands, W.
Australia:  Mar. 20.546 UT, 13.3.


COMETS C/2005 C1, C/2005 C2, C/2005 C3, AND C/2005 C4 (SOHO)
     The initial observations are given below for additional comets
found on SOHO website images (cf. IAUC 8494).  C/2005 C2 and C/2005
C3 are Kreutz sungrazers, while C/2005 C1 belongs to the Meyer
group; C/2005 C4 seems not to be a group member.

 Comet       2005 UT       R.A.(2000)Decl.  Inst.  F    MPEC
 C/2005 C1   Feb.  2.131   21 07.9  -15 30   C2    HS   2005-F32
 C/2005 C2         2.138   21 18.7  -18 13   C3    HS   2005-F32
 C/2005 C3         7.179   21 52.1  -17 39   C3/2  XL   2005-F32
 C/2005 C4        12.704   21 48.8  -14 44   C2    RK   2005-F32

                      (C) Copyright 2005 CBAT
2005 March 24                  (8498)            Daniel W. E. Green

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