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IAUC 7278: XTE J1859+226; C/1999 H1

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                                                  Circular No. 7278
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)


XTE J1859+226
     G. G. Pooley, Mullard Radio Astronomy Observatory; and R. M.
Hjellming, National Radio Astronomy Observatory, report:  "We have
made Ryle Telescope (RT) and Very Large Array (VLA) observations of
a radio counterpart to the x-ray transient XTE J1859+226 (IAUC
7274).  On Oct. 11.88 UT, the RT detected a roughly 10-mJy radio
source at 15 GHz with R.A. = 18h58m42s.0, Decl. = +22o39'10"
(equinox 2000; uncertainties 0s.5 in R.A. and 30" in Decl.).  A
further RT observation on Oct. 12.86 gave 12.5 mJy (uncertainty 1.5
mJy).  The VLA observations on Oct. 13.06 confirm the presence of a
radio source with preliminary flux densities of 8.7, 10.8, 11.1,
11.2, and 11.3 mJy at frequencies of 1.4, 4.9, 8.5, 14.9, and 22.5
GHz, with position end figures of 41s.49, 29".8 (uncertainty 0".3).
This is consistent with the position of the optical counterpart
reported on IAUC 7276.  No radio source was present at this
position in the NVSS survey in Feb. 1995 with an upper limit of
about 3 mJy."


COMET C/1999 H1 (LEE)
     Ephemeris extension to IAUC 7266:

1999 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Oct. 19    23 02.06   +28 50.9   1.036   1.908  139.8   19.7    9.4
     24    22 48.44   +23 22.9   1.147   1.978  134.8   20.9    9.8
     29    22 39.04   +18 51.4   1.272   2.047  128.9   22.2   10.1
Nov.  3    22 32.62   +15 09.8   1.408   2.115  122.7   23.3   10.5
      8    22 28.38   +12 09.5   1.552   2.183  116.6   24.0   10.8
     13    22 25.77   + 9 42.9   1.702   2.251  110.7   24.3   11.2
     18    22 24.39   + 7 43.5   1.856   2.317  105.0   24.3   11.5
     23    22 23.97   + 6 06.0   2.012   2.384   99.5   24.1   11.8
     28    22 24.30   + 4 46.4   2.170   2.449   94.2   23.7   12.1
Dec.  3    22 25.23   + 3 41.2   2.329   2.515   89.1   23.1   12.3
      8    22 26.66   + 2 48.1   2.486   2.579   84.1   22.3   12.6

     Visual m_1 estimates:  Sept. 12.17 UT, 7.7 (J. Bortle,
Stormville, NY, 20x80 binoculars); 20.78, 7.9 (Y. Nagai, Yamanashi,
Japan, 11x80 binoculars); Oct. 5.16, 7.8 (R. Keen, Mt. Thorodin,
CO, 7x50 binoculars); 7.17, 8.4 (A. Pereira, Cabo da Roca, Portugal,
9x34 binoculars); 8.94, 9.2 (K. Sarneczky, Raktanya, Hungary, 20x60
binoculars); 11.22, 8.5 (Keen, 0.15-m refl.); 11.80, 8.6 (B. H.
Granslo, Fjellhamar, Norway, 0.07-m refractor).

                      (C) Copyright 1999 CBAT
1999 October 13                (7278)            Daniel W. E. Green

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