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IAUC 7487: 4U 0115+63; 97P

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                                                  Circular No. 7487
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)


4U 0115+63
     W. Coburn, R. Rothschild, and W. A. Heindl, University of
California at San Diego, report:  "An outburst of the Be-transient
x-ray pulsar 4U 0115+63 has been detected by the RXTE/ASM.  The
daily averaged ASM countrate began to increase on Aug. 27, which
coincided with periastron of the source.  In the first four days,
the ASM countrate rose to > 7 counts/s.  This is a faster rise than
the 1999 Mar. outburst (IAUC 7116), which began several days after
periastron, and a similar countrate was achieved 9 days after that.
On 2000 Sept. 1.06 UT, the RXTE made a 1000-s pointed observation.
Strong pulsations were detected at the 3.61-s pulse period,
confirming that it is the pulsar currently in outburst.  The 2-100-
keV flux was (6.5 +/- 0.3) x 10**-9 erg cm**-2 s**-1, and at a
distance of 3500 pc had an x-ray luminosity of 9.6 x 10**36 erg/s.
Preliminary fitting of the joint PCA/HEXTE spectrum reveals two
cyclotron absorption features at about 15 and 23 keV, similar to
what was observed the previous outburst (IAUC 7126).  Because
phase-averaged spectra are complex due to pulse-phase variability,
these line energies are not well determined.  Additional
observations are encouraged.  The RXTE/ASM real-time light curve is
available at http://heasarc.gsfc.nasa.gov/xte_weather/."


COMET 97P/METCALF-BREWINGTON
     G. V. Williams, Minor Planet Center, identified this comet
with an asteroidal LINEAR object, 1.1 deg from the prediction (MPC
31663).  The nominal correction of Delta(T) = +3.5 days yields the
ephemeris below but lacks literal meaning because of the 1993
passage < 0.11 AU from Jupiter.

     2000 UT             R.A. (2000) Decl.        m2
     Sept. 1.26369    0 27 15.72   + 6 30 30.5   19.0
           1.31736    0 27 14.72   + 6 30 08.1   19.4
           3.29703    0 26 39.81   + 6 16 01.6   19.0
           3.31054    0 26 39.61   + 6 15 54.6   18.9

2000 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m2
Sept. 3     0 26.75   + 6 18.3   2.106   3.034  152.0    9.0   19.6
     13     0 23.04   + 4 57.7   2.024   3.001  163.1    5.6   19.4
     23     0 18.26   + 3 24.0   1.968   2.969  174.6    1.8   19.1
Oct.  3     0 13.03   + 1 43.3   1.941   2.937  173.6    2.2   19.0
     13     0 08.10   + 0 03.2   1.942   2.907  161.9    6.1   19.2

                      (C) Copyright 2000 CBAT
2000 September 5               (7487)            Daniel W. E. Green

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