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IAUC 7086: 1999B; 1999A; V1333 Aql

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IAUC number

                                                  Circular No. 7086
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 617-495-7244/7440/7444 (for emergency use only)

     M. Schwartz, Cottage Grove, OR, reports his discovery of an
apparent supernova (mag 16.9) on an unfiltered CCD frame taken on
Jan. 14.29 UT utilizing the 0.35-m Tenagra I automated supernova
patrol telescope in Sonoita, AZ (internet-controlled from Cottage
Grove).  SN 1999B is located at R.A. = 12h11m16s.11, Decl. =
+74o48'06".9 (equinox 2000.0), which is about 2".4 west and 20".1
south of the nucleus of UGC 7189.  The new object was confirmed on
a frame taken on Jan. 15.17.  No star is present at this position
on frames taken on 1998 July 6.34 and Aug. 2.29 using the same
equipment (limiting mag about 19).  Schwartz adds that the object
does not appear on either the first or the second Palomar Sky
Survey scans, and that it is absent from the USNO A1.0 catalogue.

     A. V. Filippenko, University of California at Berkeley,
reports that inspection of a relatively noisy CCD spectrum of SN
1999A (cf. IAUC 7083), obtained on Jan. 12 by F. Hamann (University
of California, San Diego) with the 3-m Shane reflector at Lick
Observatory, reveals that the object is probably a type-II
supernova, with some indication of strong absorption lines of s-
process elements (Ba, Sc), as was the case for SN 1987A.  Moreover,
the object appears to be subluminous.

     P. J. Callanan, University College, Cork; A. V. Filippenko,
University of California at Berkeley; and M. R. Garcia, Harvard-
Smithsonian Center for Astrophysics, write:  "We imaged the
transient low-mass x-ray binary Aql X-1 = V1333 Aql with the Near
Infrared Camera on Keck I on 1998 Sept. 29.30 UT, while Aql X-1 was
in quiescence according to XTE ASM observations.  Our K-band images
clearly resolve V1333 Aql into two stars, with a separation of 0".46.
The stars lie approximately along the east-west direction, with the
easterly star contributing 60 percent of the combined flux at K.
Z-band (about 1.05-micron) observations indicate that this star is
also somewhat bluer than its neighbor, and we speculate that this
may be the true infrared/optical counterpart of Aql X-1.  Further
analysis is in progress to constrain the contamination of the V1333
Aql optical flux due to the line-of-sight interloper."

                      (C) Copyright 1999 CBAT
1999 January 15                (7086)            Daniel W. E. Green

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