Central Bureau for Astronomical Telegrams

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IAUC 7673: 2001 O2; 2001di; V1548 Aql

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                                                  Circular No. 7673
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)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET 2001 O2
     K. J. Lawrence, S. Pravdo, and E. F. Helin, Jet Propulsion
Laboratory, report the discovery by NEAT of a diffuse comet with
some central condensation; on July 29, it showed nebulosity 12"
toward the east.

     2001 UT             R.A. (2000) Decl.        m1
     July 25.42122   22 44 33.55   -24 01 37.9   19.3
          25.43195   22 44 33.15   -24 01 36.8   19.4
          25.44270   22 44 32.74   -24 01 37.3   19.4
          29.37154   22 41 48.73   -24 02 58.3   18.6
          29.38217   22 41 48.33   -24 02 58.6   18.1
          29.39278   22 41 47.88   -24 02 58.8   19.2


SUPERNOVA 2001di IN UGC 3259
     G. M. Hurst, Basingstoke, England, reports the discovery of an
apparent supernova (mag 17.7) by M. Armstrong (Rolvenden, England)
on an unfiltered CCD image (limiting mag about 19) secured for the
U.K. Nova/Supernova Patrol on July 28.090 UT with a 0.36-m Schmidt-
Cassegrain telescope.  A follow-up series of images was obtained on
July 30.07 with thin cloud present (with the new object still at
mag about 17.7).  SN 2001di is located at R.A. = 5h14m17s.57, Decl.
= +72o20'41".0 (equinox 2000.0), which is 6" east and 39" north of
the nucleus of UGC 3259.  A CCD image (limiting mag 19.5) taken by
Armstrong on 2000 Nov. 3 shows nothing at this position, and
nothing is present on the following Palomar Sky Survey images:
1953 Oct. 14, 1991 Dec. 7 (limiting blue mag 22.5), 1996 Oct. 2
(infrared).


V1548 AQUILAE
     D. Lynch, R. J. Rudy, S. Mazuk, and C. Venturini, Aerospace
Corporation; and R. C. Puetter, Center for Astrophysics and Space
Science, University of California, San Diego, report 0.8-2.5-micron
spectrophotometry of V1548 Aql with the Lick Observatory 3-m
telescope (+ Aerospace Near Infrared Imaging Spectrograph) on July
8.42 UT, about 55 days after discovery:  "The spectrum indicated
fairly low excitation, showing the fluorescently excited O I lines
and the Fe II '1-micron' lines (Rudy et al. 2000 Ap.J. 539, 166),
as well as permitted lines of H I and He I.  Both the He I 1.0830-
micron triplet and He I 2.0581-micron singlet displayed P-Cyg
profiles.  All the line widths were about 1000 km/s.  The continuum
decreased monotonically with increasing wavelength and showed no
evidence of thermal emission from dust."

                      (C) Copyright 2001 CBAT
2001 July 30                   (7673)            Daniel W. E. Green

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