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IAUC 8487: V2361 Cyg = N Cyg 2005; 2005ai; C/1997 E2; 2005af

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IAUC number 

                                                  Circular No. 8487
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)
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V2361 CYGNI = NOVA CYGNI 2005
     N. N. Samus, Institute of Astronomy, Moscow, inform us that
the designation V2361 Cyg has been given to this nova (cf. IAUC
8483, 8484).
     S. Ciroi, F. Di Mille, and P. Rafanelli, Department of
Astronomy, University of Padova, report that a spectrum (range
446-680 nm; typical resolution 1.5 nm) of this nova, taken on Feb.
12.195 UT at the 1.2-m telescope of the Asiago Astrophysical
Observatory (+ Boller & Chivens spectrograph) is dominated by the
Balmer emission lines H_alpha and H_beta with at least three
absorption systems on their blue wings, characterized by velocities
of -3200, -6500, and -7500 km/s.  Emission lines of Fe II
multiplets 37, 38, 42, 49, 57, and 74; of O I 9 and 10; and of N
II 3, 36, 63, and 66 are present in the spectrum.
     CCD V magnitudes forwarded by E. O. Waagen, AAVSO:  Feb.
12.4637 UT, 10.13 (S. Dvorak, Clermont, FL); 13.7750, 10.28 (R.
Miles, Stourton Caundle, Dorset, England); 14.7985, 10.40 (Miles).
Visual magnitude estimates:  Feb. 14.183, 10.2 (R. J. Bouma,
Groningen, The Netherlands); 15.138, 10.3 (K. Hornoch, Lelekovice,
Czech Republic).


SUPERNOVA 2005ai IN NGC 2314
     S. Taubenberger, Max-Planck-Institut fuer Astrophysik,
Garching; F. Patat, European Southern Observatory; and S. Benetti,
Istituto Nazionale di Astrofisica, Padua, on behalf of the ERTN
(cf. IAUC 7987), report that a fully reduced spectrum (range 360-
880 nm; resolution 1.3 nm) of SN 2005ai (cf. IAUC 8486), obtained
on Feb. 14.83 UT by M. Alises at the Calar Alto Observatory 2.2-m
telescope (+ CAFOS), shows it to be a type-Ia supernova.  The
spectrum is very similar to that of SN 1994D (Patat et al. 1996,
MNRAS 278, 111) at about 1 month past maximum light.


COMET C/1997 E2 (SOHO)
     An additional Kreutz sungrazing comet (cf. IAUC 8483):

 Comet       1997 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/1997 E2   Mar.  5.281  23 22.2  - 6 57   C3     XL   2005-C38


SUPERNOVA 2005af IN NGC 4945
     Visual magnitude estimates:  Feb. 14.826 UT, 13.3 (A. Pearce,
Nedlands, W. Australia); 15.135, 12.6 (W. Souza, Sao Paulo, Brazil).

                      (C) Copyright 2005 CBAT
2005 February 15               (8487)            Daniel W. E. Green

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