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IAUC 8643: 2005ls; V574 Pup; P/2005 T4; C/2005 E2

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IAUC number

                                                  Circular No. 8643
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)

SUPERNOVA 2005ls IN MCG +07-7-1
     M. Armstrong, Rolvenden, Kent, England, reports his discovery
of an apparent supernova (mag 15.8) on unfiltered CCD images taken
on Dec. 9.052 and 9.712 UT with a 0.35-m reflector.  SN 2005ls is
located at R.A. = 2h54m15s.97, Decl. = +42o43'29".8 (equinox 2000.0),
which is approximately 6".6 west and 2".9 south of the center of
MCG +07-7-1.  Nothing was visible at this position on his image
taken on 2003 Aug. 30 (limiting mag 19.5) or on Palomar Sky Survey
imageS from 1989 Aug. 31 (limiting red mag 20.8) and 1989 Sept. 2
(limiting blue mag 22.5).

     R. J. Rudy, D. K. Lynch, 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 0.40- to 2.5-micron spectroscopy of V574
Pup (cf. IAUC 8443, 8445) using the Lick 3.0-m telescope (+ VNIRIS)
on Nov. 16 UT.  One year after outburst, the object was well into
its coronal phase with lines of [Si VI], [Si VII], [Ca VIII], [S
VIII], and [S IX].  The unidentified nova features at 0.8926,
1.1110, 1.5545, and 2.0996 microns were present, as well.  Two
distinct profile shapes existed for the emission lines:  flat-
topped for the H I and He I lines, and centrally peaked for the
coronal and higher excitation features.  There was no evidence of
self-emission from dust.  Broadband magnitudes measured for V574
Pup:  V = 13.6, J = 12.7, H = 12.7, K = 11.7.

COMET P/2005 T4 (SWAN)
     Elliptical orbital elements from MPEC 2005-W25:

     T = 2005 Oct. 10.538 TT          Peri. =  41.444
     e = 0.93058                      Node  =  25.422   2000.0
     q = 0.64940 AU                   Incl. = 160.036
       a =  9.35420 AU     n = 0.034450     P =  28.6 years

     Visual total-magnitude estimates by J. J. Gonzalez, Leon,
Spain, with a 0.20-m reflector (all made with the comet at
altitudes of about 11-17 deg):  Sept. 21.83 UT, 11.2; Oct. 26.84,
11.3; Nov. 22.79, 11.2; Dec. 4.81, 10.9.

                      (C) Copyright 2005 CBAT
2005 December 9                (8643)            Daniel W. E. Green

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