TITLE:          GCN/IPN/HUNTSVILLE LOCALIZATION
NOTICE_TYPE:    Final (based on the Huntsville AD Report location)
NOTICE_DATE:    Mon Apr 26 19:16:46 GMT 1999
TRIGGER_NUM:    7529
GRB_DATE:       99/04/24
GRB_TIME:       22:09:22.68 UT
BACO_RA:        74.45d {+04h 57m 49s}   (J2000)
BACO_DEC:       +45.18d {+45d 10' 52"}
HUNT_RA:        84.01d {+05h 36m 02s}   (J2000)
HUNT_DEC:       36.71d {+36d 42' 27"}
HUNT_ERR:       1.74 [degees radius, statistical only]
B_H_DELTA:      11.13 [deg]
HUNT_SC_AZ:     53.20 [deg]
HUNT_SC_EL:     -40.10 [deg]  {Zen_angle=130.10}
SUN_POSTN:      32.03d {+02h 08m 06s}   +12.95d {+12d 56' 54"}   (Current)
SUN_B_DIST:     48.23 [deg]
MOON_POSTN:     152.44d {+10h 09m 45s}   +12.32d {+12d 19' 07"}   (Current)
MOON_B_DIST:    72.87 [deg]
ANNULUS_RA:     145.7614d {+09h 43m 03s}   (J2000)
ANNULUS_DEC:    -7.6789d {-07d 40' 43"}
ANNULUS_RADIUS: 72.590 [deg]
ANNULUS_WIDTH:  0.127 [deg]  (Total width)
COMMENTS:       GRB. SINGLE PULSE, DUR. ~6S, STARTS AT ~T+1 S. VISIBLE ABOVE 
COMMENTS:       300 KEV. WEAK PRECURSOR AT ~T-2 S.                                       

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

  87.131   41.323     5.21   <=== +3-sigma probability
  87.059   41.218     5.09
  86.986   41.113     4.97
  86.914   41.007     4.86
  86.842   40.902     4.74
  86.771   40.796     4.62
  86.699   40.690     4.50
  86.628   40.584     4.38
  86.557   40.478     4.26
  86.487   40.371     4.14
  86.416   40.265     4.02
  86.346   40.158     3.90
  86.276   40.051     3.78
  86.207   39.944     3.66
  86.137   39.837     3.54
  86.068   39.730     3.43   <=== +2-sigma probability
  85.999   39.623     3.31
  85.931   39.515     3.19
  85.863   39.407     3.07
  85.795   39.299     2.95
  85.727   39.191     2.83
  85.659   39.083     2.71
  85.592   38.975     2.59
  85.525   38.866     2.47
  85.458   38.758     2.35
  85.392   38.649     2.23
  85.326   38.540     2.11
  85.260   38.431     1.99
  85.194   38.322     1.87
  85.128   38.213     1.75
  85.063   38.103     1.63   <=== +1-sigma probability
  84.998   37.994     1.50
  84.933   37.884     1.38
  84.869   37.774     1.26
  84.805   37.664     1.15
  84.741   37.554     1.03
  84.677   37.444     0.91
  84.614   37.334     0.79
  84.550   37.223     0.67
  84.487   37.113     0.55
  84.425   37.002     0.44
  84.362   36.891     0.34
  84.300   36.780     0.24
  84.238   36.669     0.19
  84.176   36.558     0.20
  84.176   36.558     0.20   <=== Max probability
  84.176   36.558     0.20
  84.114   36.447     0.28
  84.053   36.336     0.38
  83.992   36.224     0.49
  83.931   36.112     0.60
  83.871   36.001     0.72
  83.810   35.889     0.84
  83.750   35.777     0.96
  83.690   35.665     1.08
  83.631   35.553     1.20
  83.571   35.441     1.32
  83.512   35.328     1.44
  83.453   35.216     1.56
  83.395   35.103     1.68
  83.336   34.991     1.80   <=== -1-sigma probability
  83.278   34.878     1.93
  83.220   34.765     2.05
  83.162   34.652     2.17
  83.105   34.539     2.29
  83.048   34.426     2.41
  82.990   34.313     2.54
  82.934   34.200     2.66
  82.877   34.086     2.78
  82.821   33.973     2.90
  82.765   33.859     3.03
  82.709   33.746     3.15
  82.653   33.632     3.27
  82.597   33.518     3.39
  82.542   33.404     3.52   <=== -2-sigma probability
  82.487   33.291     3.64
  82.432   33.176     3.76
  82.378   33.062     3.89
  82.324   32.948     4.01
  82.269   32.834     4.13
  82.215   32.719     4.25
  82.162   32.605     4.38
  82.108   32.491     4.50
  82.055   32.376     4.62
  82.002   32.261     4.75
  81.949   32.147     4.87
  81.897   32.032     4.99
  81.844   31.917     5.12
  81.792   31.802     5.24   <=== -3-sigma probability
-------------------------------- THE END --------------------------------