TITLE:          GCN/IPN/HUNTSVILLE LOCALIZATION
NOTICE_TYPE:    Final (based on the Huntsville AD Report location)
NOTICE_DATE:    Mon Apr 26 19:18:14 GMT 1999
TRIGGER_NUM:    7527
GRB_DATE:       99/04/24
GRB_TIME:       03:12:31.92 UT
BACO_RA:        78.90d {+05h 15m 36s}   (J2000)
BACO_DEC:       -66.87d {-66d 52' 08"}
HUNT_RA:        88.94d {+05h 55m 45s}   (J2000)
HUNT_DEC:       -60.32d {-60d 19' 11"}
HUNT_ERR:       1.67 [degees radius, statistical only]
B_H_DELTA:      7.91 [deg]
HUNT_SC_AZ:     263.40 [deg]
HUNT_SC_EL:     -38.10 [deg]  {Zen_angle=128.10}
SUN_POSTN:      31.28d {+02h 05m 08s}   +12.69d {+12d 41' 17"}   (Current)
SUN_B_DIST:     86.77 [deg]
MOON_POSTN:     142.31d {+09h 29m 14s}   +14.83d {+14d 50' 02"}   (Current)
MOON_B_DIST:    93.75 [deg]
ANNULUS_RA:     145.8347d {+09h 43m 20s}   (J2000)
ANNULUS_DEC:    -7.7074d {-07d 42' 26"}
ANNULUS_RADIUS: 71.931 [deg]
ANNULUS_WIDTH:  0.073 [deg]  (Total width)
COMMENTS:       GRB. SINGLE PULSE WITH SUBSTRUCTURE, DUR. ~30S, STARTS AT
COMMENTS:       ~T-0.5S, MAX AT ~T+6.5S. VISIBLE ABOVE 300 KEV.
COMMENTS:       SUCCESSOR MAX AT ~T+250S, DUR. ~30S.                                                     

This IPN localization is preliminary.  The "total width" of the annulus
was selected to include all known uncertainties and systematics.  The final
analysis will reduce this width.  All follow-up queries should be addressed to
Kevin Hurley (UC Berkeley, khurley@sunspot.ssl.berkeley.edu).

The center of the IPN annulus is tabulated below along the segment
that intersects the Huntsville error circle.  The Distance column is
the sky-angle distance between the Huntville location and the sampled position
on the arc segment.  The position of maximum probability plus
the 1-, 2-, & 3-sigma containment probabilities (statistical+systematic)
are marked.

A detailed description of the format, content, and meaning of this
document is given in the URL:  http://gcn.gsfc.nasa.gov/gcn/ipn.html

     (J2000)
   RA       DEC       Distance

  78.940  -60.089     4.97   <=== +3-sigma probability
  79.013  -60.211     4.92
  79.087  -60.333     4.87
  79.161  -60.454     4.83
  79.235  -60.575     4.79
  79.310  -60.695     4.75
  79.386  -60.816     4.72
  79.462  -60.935     4.69
  79.539  -61.055     4.66
  79.616  -61.174     4.63
  79.694  -61.292     4.61
  79.772  -61.411     4.59
  79.851  -61.529     4.57
  79.931  -61.646     4.56
  80.011  -61.763     4.55
  80.092  -61.880     4.55
  80.173  -61.996     4.54
  80.255  -62.112     4.55
  80.255  -62.112     4.55   <=== Max probability
  80.255  -62.112     4.55
  80.337  -62.227     4.55
  80.420  -62.342     4.56
  80.503  -62.457     4.57
  80.587  -62.571     4.58
  80.672  -62.685     4.59
  80.757  -62.798     4.61
  80.843  -62.911     4.64
  80.929  -63.024     4.66
  81.016  -63.136     4.69
  81.103  -63.247     4.72
  81.191  -63.358     4.75
  81.279  -63.469     4.78
  81.368  -63.579     4.82
  81.458  -63.689     4.86
  81.548  -63.798     4.90
  81.638  -63.907     4.95
  81.729  -64.015     4.99
  81.821  -64.123     5.04   <=== -3-sigma probability
-------------------------------- THE END --------------------------------