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IAUC 8640: 2005lb-2005lq; V1663 Aql; C/2005 S12, C/2005 S13

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IAUC number

                                                  Circular No. 8640
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)

SUPERNOVAE 2005lb-2005lq
     CBET 315 contains information for sixteen newly discovered
supernovae found on multiple g, r, and i images taken with the SDSS
2.5-m telescope and reported by J. Frieman on behalf of the Sloan
Digital Sky Survey II collaboration; all of the new objects are
type-Ia supernovae except for 2005lb and 2005lc (type-II events)
and 2005lm (probable type-II event).  Fourteen of the supernovae
were discovered at mag g > 20; the other two are tabulated below:

  SN       Date  UT     R.A. (2000.0) Decl.     Mag.    z
  2005lb   Sept. 10   22 54 50.05  - 0 15 09.0  18.0   0.03
  2005lc   Sept. 10    3 02 11.18  - 1 09 59.4  18.8   0.01

     R. C. Puetter, University of California at San Diego; R. J.
Rudy, D. K. Lynch, S. Mazuk, and C. C. Venturini, The Aerospace
Corporation; R. B. Perry, Langley Research Center, NASA; and B.
Walp, Lick Observatory, report 0.47- to 2.5-micron spectroscopy of
V1663 Aql (cf. IAUC 8540, 8544) with the Lick 3.0-m telescope (+
VNIRIS) at Nov. 14.160 UT.  The optical spectrum was largely
nebular, showing [O III], [N II], H_alpha, and weak He I 587.6-nm,
He I 706.5-nm, and [O I].  Weak neutral lines of O I and C I were
present.  The spectrum showed coronal-line emission of [S VIII],
[S IX], strong [Si VI] and [Si VII], weak [Ca VIII], and the
unidentified novae lines.  The emission lines were flat-topped with
minor structure, and their FWHM and FWZI were 2000 km/s and 2600
km/s, respectively.  Based on the O I lines, which are about
equally produced by Lyman_beta and continuum fluorescence, the
reddening is possibly as large as 2 magnitudes in E(B-V).

COMETS C/2005 S12 AND C/2005 S13 (SOHO)
     Two additional Kreutz sungrazing comets have been found on
SOHO website images (cf. IAUC 8638), their first available
positions given below.  C/2005 S12 was stellar in C3 images,
reaching mag 7.0 at 11.1 solar radii on Sept. 26.431.  S/2005 S13
was tiny, stellar, and too faint for photometry in C3 images, and
both objects were faint and diffuse in C2 images.

 Comet        2005 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2005 S12   Sep. 26.154  11 53.8   - 2 05   C3/2   HS   2005-X11
 C/2005 S13        29.821  12 05.8   - 3 41   C3/2   BZ   2005-X11

                      (C) Copyright 2005 CBAT
2005 December 5                (8640)            Daniel W. E. Green

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