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IAUC 8698: V2362 Cyg = N Cyg 2006; 2006bk, 2006bl

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IAUC number

                                                  Circular No. 8698
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 617-495-7440/7244/7444 (for emergency use only)

      H. Yamaoka, Kyushu University, writes that several Japanese
observers took low-resolution spectra around Apr. 5.8 UT of the
possible nova reported on IAUC 8697, including K. Kinugasa (Gunma
Astronomical Observatory, 1.5-m telescope; range 400-800 nm,
resolution about 500); H. Naito and S. Ozaki (Nishi-Harima
Astronomical Observatory, 2.0-m NAYUTA telescope; range 420-790 nm,
resolution about 1200); and M. Fujii (Ibara, Okayama, Japan; range
390-860 nm).  The spectrum shows a rather flat continuum, on which
an H_alpha line shows a clear P-Cyg profile (FWHM of the emission
is 500 km/s; the absorption minimum is 700 km/s bluer than the
emission peak).  Other lines, including H_beta and H_gamma, are
seen in absorption.  This suggests that the object is a classical
nova caught at or slightly before its maximum light.  Na I D
absorption line (EW = 0.3 nm) indicates that some interstellar
reddening exists.
     N. N. Samus, Russian Academy of Sciences, informs us that this
nova has been assigned the designation V2362 Cyg.
     Further to IAUC 8697, H. Nishimura provides an additional
photographic magnitude of V2362 Cyg:  Apr. 5.79 UT, 7.9.  Visual
magnitude estimates:  Apr. 5.427, 8.5: (J. D. West, Mulvane, KS);
5.97, 8.5 (M. Reszelski, Szamotuly-Galowo, Poland).

SUPERNOVAE 2006bk AND 2006bl
     Two additional apparent supernovae have been reported from
unfiltered CCD images by T. Boles (cf. IAUC 8684):

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006bk  Apr. 3.985  15 04 33.61  +35 57 51.1  16.9  10".6 E, 3".3 S
2006bl  Apr. 4.063  15 39 50.62  +14 11 21.3  17.3  1".5 W, 6".2 N

Additional magnitudes for 2006bk in MCG +06-33-20:  1994 May 3 UT,
[20.5 (Digitized Sky Survey, red); 1998 Mar. 17, [21.0 (DSS, blue);
2006 Jan. 28, [19.5 (Boles); Feb. 7, [19.4 (T. Puckett, Ellijay,
GA); Apr. 4.345, 17.4 (Puckett and L. Cox; independent discovery);
4.933, 16.9 (Boles); 5.232, 17.1 (Puckett).  Puckett provides the
following position end figures for 2006bk:  33s.68, 50".6 (offset
11".8 east, 3".6 south).  Additional magnitudes for 2006bl in MCG
+02-40-9:  1990 June 14, [21.0 (DSS, blue); 1992 June 20, [20.5
(DSS, red); 2005 June 10, [19.5 (Boles); 2006 Jan. 28, [19.5
(Boles); Apr. 4.943, 17.3 (Boles).

                      (C) Copyright 2006 CBAT
2006 April 5                   (8698)            Daniel W. E. Green

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