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IAUC 8645: 2005lt, 2005lu; 2005lv; V838 Mon

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IAUC number

                                                  Circular No. 8645
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 2005lt AND 2005lu
     Further to IAUC 8641, H. Khandrika, M. Baek, and W. Li report
the LOSS discoveries of two apparent supernovae on unfiltered KAIT

SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2005lt  Dec. 10.55  11 42 26.21  +20 07 05.0  15.7  24".5 E, 5".4 S
2005lu  Dec. 11.27   2 36 03.71  -17 15 50.0  17.1  1".8 E, 2".2 S

Additional magnitudes for SN 2005lt in MCG +03-30-51:  May 29.20 UT,
[19.0; Dec. 12.54, 15.7 (in poor conditions, but the new object was
obviously detected).  The offsets above for SN 2005lu are with
respect to the nucleus of MCG -03-07-40, which is the western
component of the interacting galaxy pair ESO 545-G38 (the eastern
component is MCG -03-07-39).  Additional magnitudes for 2005lu:
Nov. 6.28 UT, [18.5; Dec. 14.13, 16.8.

SUPERNOVA 2005lv IN UGC 2964
     T. Puckett and R. Gagliano report the discovery of an apparent
supernova (mag 18.7) on an unfiltered CCD frame taken with the
Puckett Observatory 0.60-m automated supernova patrol telescope (cf.
IAUC 8635) on Dec. 6.19 UT (and confirmed at mag 18.6 by Puckett on
frames taken on Dec. 11.18 with a 0.60-m reflector).  The new
object is located at R.A. = 4h08m56s.47, Decl. = +27o11'50".8
(equinox 2000.0), which is 13".5 west and 2".4 south of the center
of UGC 2964.  SN 2005lv was not present on images taken by Puckett
on Nov. 23 (limiting mag about 20.0).

     D. K. Lynch, R. J. Rudy, S. Mazuk, and C. C. Venturini,
Aerospace Corporation; R. C. Puetter, University of California at
San Diego; R. B. Perry, Langley Research Center, NASA; and B. Walp,
Lick Observatory, report 0.47- to 2.5-micron spectroscopy of V838
Mon (cf. IAUC 7785, 7812, 8221) using the Lick 3.0-m telescope (+
VNIRIS) on Nov. 13.42 UT.  The object continues to develop
spectrally and to fade.  Since 2004 there has been a dramatic
weakening, and in some cases disappearance, of the TiO and VO
absorption bands, probably due to thinning of the line-of-sight
density as the shell expands.  The AlO bands also weakened, though
only slightly.  There were also a large number of molecular
absorption bands in the visible.  Approximate magnitudes for V838
Mon:  V = 15.7, J = 7.8, H = 6.6, K = 5.8.

                      (C) Copyright 2005 CBAT
2005 December 14               (8645)            Daniel W. E. Green

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