Click here for the BAT GCN circular template 
Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  274.4646    -6.9086   0.0126     7.1648     6.5135         0.6672551     15.189 TRIG_00317662                 
 
Foreground time interval of the image:
 -0.232  18.341 (delta_t =  18.573 [sec])
Background time interval of the image:
-239.360  -0.232 (delta_t = 239.128 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 5) Time of each bin is in the middle of the bin.
 1 s binning
 From T0-310 s to T0+310 s 
 
 From T100_start - 20 s to T100_end + 30 s 
 
 Full time interval 
 
 64 ms binning
 Full time interval 
 
 From T100_start to T100_end 
 
 From T0-5 sec to T0+5 sec 
 
 16 ms binning
 From T100_start-5 s to T100_start+5 s 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 8 ms binning
 From T100_start-3 s to T100_start+3 s
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 2 ms binning
 From T100_start-1 s to T100_start+1 s
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 SN=5 or 10 sec. binning (whichever binning is satisfied first)
 
 SN=5 or 10 sec. binning (T < 200 sec) 
 
 Quad-rate summed light curves (from T0-300s to T0+1000s)
 
Spectral Evolution
 
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
 
Time interval is from   -0.232 sec. to   18.708 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71851     ( -0.20461   0.209822 )
Norm@50keV  : 1.95791E-03    ( -0.000251042   0.00024667 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.82 using 59 PHA bins.
# Reduced chi-squared =          1.383 for     57 degrees of freedom 
# Null hypothesis probability =   2.939261e-02
 
Photon flux (15-150 keV)    in 18.94 sec: 0.261737 ( -0.0297747  0.0297955 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.42867e-07 ( -4.55319e-08  4.64892e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -0.232 sec. to   18.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43189     ( -0.996239   0.479939 )
Epeak [keV] : 85.5391      ( -44.1116 -85.5781 )
Norm@50keV  : 2.84571E-03    ( -0.00284484   0.00787705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.44 using 59 PHA bins.
# Reduced chi-squared =          1.401 for     56 degrees of freedom 
# Null hypothesis probability =   2.557869e-02
 
Photon flux (15-150 keV)    in 18.94 sec: 0.258288 ( -0.031303  0.030826 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3074e-07 ( -5.77784e-08  5.52726e-08 ) ergs/cm2
 
Band function
 
Time interval is from   -0.232 sec. to   18.708 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.729301   ( -2.71197   -0.742591 )
beta        : -2.13617    ( -0.628408   0.408618 )
Epeak [keV] : 37.3260      ( -10.5484 25.7027 )
Norm@50keV   : 7.28262E-02    ( -0.0790112   32.2939 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.66 using 59 PHA bins.
# Reduced chi-squared =          1.358 for     55 degrees of freedom 
# Null hypothesis probability =   3.999528e-02
 
Photon flux (15-150 keV)    in 18.94 sec: 0.251467 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.2864  (-1.23755  1.53543)
R^2/D10^2   : 0.111052  (-0.0456605   0.0702361)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.22 using 59 PHA bins.
# Reduced chi-squared =          1.583 for     57 degrees of freedom 
# Null hypothesis probability =   3.318865e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.574e-08   9.792e-09
25- 50  1.183e-07   1.867e-08
50-150  6.695e-08   1.947e-08
15-150  2.310e-07   3.970e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 116.944       (-44.7027      -116.057)
Norm        : 1.11616       (-0.148229     0.209682)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.43 using 59 PHA bins.
# Reduced chi-squared =          1.376 for     57 degrees of freedom 
# Null hypothesis probability =   3.142033e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.512e-08   8.760e-09
25- 50  9.816e-08   1.808e-08
50-150  1.729e-07   8.316e-08
15-150  3.262e-07   1.053e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.09889        (-1.27143      1.35629)
R1^2/D10^2  : 0.228788        (-0.0981506      0.140181)
kT2 [keV]   : 45.0436        (-19.8086      -45.7649)
R2^2/D10^2  : 4.66345E-04    (-0.000442873   0.00199641)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.36 using 59 PHA bins.
# Reduced chi-squared =          1.279 for     55 degrees of freedom 
# Null hypothesis probability =   7.938948e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.398e-08   1.462e-08
25- 50  1.076e-07   3.742e-08
50-150  1.892e-07   9.981e-08
15-150  3.508e-07   1.331e-07
Peak spectrum fit
Power-law model
 
Time interval is from   -0.132 sec. to    0.868 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50473     ( -0.238937   0.24156 )
Norm@50keV  : 7.51205E-03    ( -0.00113999   0.00112944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.67 using 59 PHA bins.
# Reduced chi-squared =         0.9591 for     57 degrees of freedom 
# Null hypothesis probability =   5.629653e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.938996 ( -0.136051  0.136172 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.1209e-08 ( -1.17314e-08  1.19818e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -0.132 sec. to    0.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.124387     ( -1.79842   1.21049 )
Epeak [keV] : 59.8470      ( -14.499 105.678 )
Norm@50keV  : 4.36270E-02    ( -0.0436553   0.418477 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.76 using 59 PHA bins.
# Reduced chi-squared =         0.9064 for     56 degrees of freedom 
# Null hypothesis probability =   6.729387e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.888572 ( -0.143468  0.143608 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.14252e-08 ( -1.34196e-08  1.46674e-08 ) ergs/cm2
 
Band function
 
Time interval is from   -0.132 sec. to    0.868 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.54948   ( -4.98712   -4.31952 )
beta        : -2.17268    ( -0.890787   0.565076 )
Epeak [keV] : 39.8931      ( -11.0848 24.5233 )
Norm@50keV   : 2.35821    ( -2.35539   50.2379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.83 using 59 PHA bins.
# Reduced chi-squared =         0.8697 for     55 degrees of freedom 
# Null hypothesis probability =   7.425167e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.44305e-08 ( -6.44235e-08  -1.26181e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.6557  (-1.87637  2.35812)
R^2/D10^2   : 0.199587  (-0.0919618   0.157098)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.43 using 59 PHA bins.
# Reduced chi-squared =         0.9373 for     57 degrees of freedom 
# Null hypothesis probability =   6.098508e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.779e-09   1.792e-09
25- 50  2.267e-08   4.805e-09
50-150  2.259e-08   7.370e-09
15-150  5.204e-08   1.034e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 198.030       (-101.12      -197.655)
Norm        : 3.86399       (-0.556527     0.641706)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.03 using 59 PHA bins.
# Reduced chi-squared =         0.9303 for     57 degrees of freedom 
# Null hypothesis probability =   6.247640e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.630e-09   5.495e-09
25- 50  1.851e-08   1.032e-08
50-150  4.051e-08   2.227e-08
15-150  6.865e-08   3.784e-08
Double BB
 
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.8592        (-3.02978      3.08796)
R1^2/D10^2  : 0.312895        (-0.179475      0.559576)
kT2 [keV]   : 197.499        (      )
R2^2/D10^2  : 8.57887E-05    (-5.96511e-05   0.0511966)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.03 using 59 PHA bins.
#Fit statistic : Chi-Squared =          47.93 using 59 PHA bins.
# Reduced chi-squared =         0.8733 for     55 degrees of freedom 
# Reduced chi-squared =         0.8714 for     55 degrees of freedom 
# Null hypothesis probability =   7.358555e-01
# Null hypothesis probability =   7.393778e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.150e-09   3.689e-09
25- 50  2.182e-08   1.174e-08
50-150  3.720e-08   2.002e-08
15-150  6.717e-08   3.267e-08
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72492     ( -0.206099   0.211666 )
Norm@50keV  : 1.94742E-03    ( -0.000253347   0.000248964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.00 using 59 PHA bins.
# Reduced chi-squared =          1.404 for     57 degrees of freedom 
# Null hypothesis probability =   2.391763e-02
 
Photon flux (15-150 keV)    in 18.57 sec: 0.260932 ( -0.030062  0.0300833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.34219e-07 ( -4.49184e-08  4.58781e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32349     ( -1.07856   0.582493 )
Epeak [keV] : 72.3778      ( -31.5584 -72.4079 )
Norm@50keV  : 3.29070E-03    ( -0.00328919   0.010727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.31 using 59 PHA bins.
# Reduced chi-squared =          1.416 for     56 degrees of freedom 
# Null hypothesis probability =   2.190688e-02
 
Photon flux (15-150 keV)    in 18.57 sec: 0.256179 ( -0.031705  0.031534 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.17913e-07 ( -5.71195e-08  5.597e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33165   ( -0.486304   0.538047 )
beta        : -9.37140    ( 9.37166   19.3717 )
Epeak [keV] : 73.2137      ( -28.589 -73.1448 )
Norm@50keV   : 3.25217E-03    ( -0.00133394   0.00204557 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.31 using 59 PHA bins.
# Reduced chi-squared =          1.442 for     55 degrees of freedom 
# Null hypothesis probability =   1.761935e-02
 
Photon flux (15-150 keV)    in 18.57 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
 S(25-50 keV) vs. S(50-100 keV) plot 
 
S(25-50 keV)  = 9.35e-08
S(50-100 keV) = 1.14e-07
 T90 vs. Hardness ratio plot 
 
T90                                   = 17.33599999547 sec.
Hardness ratio (energy fluence ratio) = 1.21925
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.60852
Count Ratio (50-100 keV) / (15-25 keV) = 0.660509
 Mask shadow pattern 
 
IMX = 1.248943120000310E-01, IMY = -1.425976206459038E-02
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
 Spacecraft aspect plot 
 
 Bright source in the pre-burst/pre-slew/post-slew images 
 Pre-burst image of 15-350 keV band 
Time interval of the image:
-239.360000 -0.232000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9833 -15.6368    0.4  28.0  -94.4   7.5372  25.9    0.3	Sco X-1                       
254.4358  35.3035   22.0  52.7  -17.5   0.3079   0.5    2.6	Her X-1                       
256.1115 -37.8956    4.8  28.6 -147.1  -0.5271  -2.4    6.7	4U 1700-377                   
256.5404 -36.2887   12.8  27.2 -145.5   0.1924   0.9    9.5	GX 349+2                      
262.9174 -24.8018    6.8  15.0 -135.0   0.3513   1.7    6.0	GX 1+4                        
264.9243 -44.4105    7.2  31.3 -164.9   0.3462   1.6    8.1	4U 1735-44                    
268.3166  -1.5318    2.1  13.7  -22.0   1.0266   5.4    5.7	SW J1753.5-0127               
270.2550 -25.0967    1.3  11.6 -160.4   1.8105   9.4    1.9	GX 5-1                        
270.3666 -25.6486    3.1  12.1 -161.7   0.8143   4.2    6.6	GRS 1758-258                  
273.9749 -14.0140    2.6   0.0    8.6   0.9214   4.5    2.2	GX 17+2                       
275.8868 -30.3339    3.1  16.4  176.7   0.7760   3.8    2.8	H1820-303                     
285.0167 -24.8946   19.3  15.0  140.4   0.1199   0.6    1.9	HT1900.1-2455                 
288.7656  10.9332    1.2  29.0   33.7   2.4971   9.5    2.1	GRS 1915+105                  
262.8194 -33.7094    7.0  22.1 -152.1   0.3305   1.6   11.3	GX 354-0                      
229.3393 -44.5694    3.3  48.5 -135.5   2.4413   3.4 ------	UNKNOWN                       
236.5719  20.7690    3.3  50.6  -44.7   3.5893   3.6 ------	UNKNOWN                       
233.1975  -4.4829    2.2  41.3  -78.0   4.4714   5.3 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-0.232000 18.340600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9865 -15.7136    4.5  28.0  -94.5   0.1724   2.5    4.4	Sco X-1                       
254.3885  35.3995    8.5  52.8  -17.5   0.1901   1.4    4.8	Her X-1                       
255.8706 -37.9764    5.4  28.8 -146.9  -0.1136  -2.1    9.6	4U 1700-377                   
256.3442 -36.4771    4.6  27.4 -145.5   0.1285   2.5    5.5	GX 349+2                      
262.8663 -24.5932    6.1  14.8 -134.3   0.0862   1.9   12.0	GX 1+4                        
264.9192 -44.5832   12.5  31.5 -165.0   0.0503   0.9   11.0	4U 1735-44                    
268.3948  -1.4216    6.5  13.8  -21.5   0.0793   1.8    2.5	SW J1753.5-0127               
270.4344 -25.1546   11.3  11.6 -161.3   0.0500   1.1    9.3	GX 5-1                        
270.4606 -25.5910    0.0  12.0 -162.0  -0.0767  -1.7   12.5	GRS 1758-258                  
274.0194 -14.0133   16.4   0.1   50.3  -0.0321  -0.7    1.6	GX 17+2                       
275.8818 -30.5195    9.1  16.6  176.8   0.0574   1.3    9.4	H1820-303                     
285.1093 -24.9027    5.9  15.1  140.2  -0.0927  -2.0    4.1	HT1900.1-2455                 
288.9563  10.7999    0.0  29.0   34.2  -0.0453  -0.8   12.8	GRS 1915+105                  
263.1590 -33.9919    0.0  22.2 -153.1  -0.0948  -2.0   12.7	GX 354-0                      
274.4646  -6.9086    0.8   7.2    6.5   0.6673  15.2 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
66.740590 962.673900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9821 -15.6398    0.3  30.2 -137.4  27.6838  34.0    0.2	Sco X-1                       
254.3755  35.4838   29.1  46.5  -50.8   1.2860   0.4    9.4	Her X-1                       
255.7821 -37.8580  191.0  35.3  178.0   0.0475   0.1    9.7	4U 1700-377                   
256.4907 -36.4600    4.0  33.8  178.5   2.1962   2.9    3.5	GX 349+2                      
263.2260 -24.6900    0.0  20.8 -177.9   1.1617   2.0   12.3	GX 1+4                        
264.7100 -44.3007    6.4  38.4  163.3   1.9233   1.8    9.1	4U 1735-44                    
268.3560  -1.4337    1.8   8.2  -76.6   4.0883   6.4    1.3	SW J1753.5-0127               
270.2759 -25.1106    1.0  18.6  164.1   7.0096  11.3    1.9	GX 5-1                        
270.1596 -25.7617    6.9  19.3  164.0   1.0526   1.7    7.8	GRS 1758-258                  
274.0481 -13.9668    2.0   7.1  155.8   3.5108   5.9    4.8	GX 17+2                       
275.9349 -30.3983    2.0  23.5  148.9   3.9615   5.7    1.9	H1820-303                     
285.0735 -25.0430    4.9  20.7  124.1   1.6315   2.4    7.6	HT1900.1-2455                 
288.8005  10.9150    0.7  22.8   10.6  10.6563  16.8    1.8	GRS 1915+105                  
299.6038  35.2093    0.5  48.3   -0.4  30.9714  21.3    0.8	Cyg X-1                       
308.1861  40.8927    5.7  56.9    2.0   6.9500   2.0    5.0	Cyg X-3                       
263.0567 -33.8652    3.0  29.0  171.9   2.7452   3.8    3.8	GX 354-0                      
256.7876 -59.5807    3.6  54.4  162.9  12.7591   3.3 ------	UNKNOWN                       
283.9119  10.2563    2.3  19.5    0.6   2.6705   5.0 ------	UNKNOWN                       
272.9157  -3.5246    2.9   3.8  -53.6   2.4449   3.9 ------	UNKNOWN                       
249.7170   1.6954    5.5  26.2  -99.8   1.8932   2.1 ------	UNKNOWN                       
221.9855 -38.0670    2.6  56.7 -159.6  13.6448   4.5 ------	UNKNOWN                       
	UNKNOWN                       
Plot creation:
Sun May 31 06:58:23 EDT 2015