Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7111: 1999 D1; GRB 990217; N Mus 1998

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 7110 SEARCH Read IAUC 7112

View IAUC 7111 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7111
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET 1999 D1
     The LONEOS program reports the discovery of an apparent comet.
The following observations are available:

     1999 UT             R.A. (2000) Decl.        m1    Observer
     Feb. 20.40541   12 15 00.34   + 3 20 24.3   18.4   Hermann
          20.42580   12 14 59.55   + 3 19 50.7            "
          20.44621   12 14 58.73   + 3 19 16.0            "
          20.94853   12 14 40.52   + 3 05 28.0          Pravec
          20.95084   12 14 40.40   + 3 05 24.8            "
          20.95317   12 14 40.29   + 3 05 19.8            "
          20.95551   12 14 40.17   + 3 05 16.4            "
          20.95784   12 14 40.03   + 3 05 13.2            "
          20.96249   12 14 39.90   + 3 05 04.8            "

S. M. Hermann (Lowell Observatory).  0.59-m LONEOS Schmidt
  telescope + CCD.  Measurer B. W. Koehn.
P. Pravec (Ondrejov).  0.65-m f/3.6 reflector + CCD.  Comet has a
  broad tail 15" long in p.a. 290 deg.


GRB 990217
     L. Piro, Istituto Astrofisica Spaziale (IAS), Rome; L. A.
Antonelli, Osservatorio Astronomico, Rome; G. D'Andreta and V.
Torroni, BeppoSAX Scientific Operation Center (SOC), Rome; M.
Dadina, IAS and SOC, Rome; G. Gennaro, BeppoSAX Operation Control
Center, Telespazio, Rome; and M. R. Daniele, BeppoSAX Science Data
Center, Rome, report:  "The BeppoSAX Wide Field Camera (WFC) error
box of GRB 990217 (IAUC 7110) was observed starting on Feb. 17.49
UT (6 hr after the gamma-ray trigger), using the Narrow Field
Instruments (NFI) of BeppoSAX.  After a preliminary analysis of the
first 15 hr of observation, no source is detected, with a 2-sigma
upper limit of about 1 x 10E-13 erg cmE-2 sE-1 in the range 2-10
keV.  The slope of the decay power law connecting the WFC and NFI
should then be steeper than about -1.6 (i.e., more steep than in
all the x-ray afterglows observed so far with BeppoSAX)."


NOVA MUSCAE 1998
     Visual magnitude estimates by A. Pearce, Dowerin, W. Australia:
Jan. 17.81 UT, 12.4; 18.81, 12.5; 20.80, 13.3; Feb. 17.74, 14.2.

                      (C) Copyright 1999 CBAT
1999 February 20               (7111)            Daniel W. E. Green

Read IAUC 7110 SEARCH Read IAUC 7112

View IAUC 7111 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!