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
  264.1950   -25.2153   0.0086    52.5638   166.9460        17.5576724     22.467 TRIG_00361831                 
 
Foreground time interval of the image:
-15.168  50.733 (delta_t =  65.901 [sec])
Background time interval of the image:
-56.467 -15.168 (delta_t =  41.299 [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 4.096000
 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 4.096000
 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 4.096000
 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  -15.168 sec. to   64.832 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56357     ( -0.0763854   0.0763904 )
Norm@50keV  : 1.68694E-02    ( -0.000687509   0.000687436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.36 using 59 PHA bins.
# Reduced chi-squared =         0.8484 for     57 degrees of freedom 
# Null hypothesis probability =   7.855262e-01
 
Photon flux (15-150 keV)    in 80 sec: 2.14405 ( -0.0980571  0.0984693 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26808e-05 ( -5.37447e-07  5.38774e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from  -15.168 sec. to   64.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56082     ( -0.140825   0.0772558 )
Epeak [keV] : 9999.22      ( -9999.35 -9999.35 )
Norm@50keV  : 1.68930E-02    ( -0.000688682   0.00305425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.39 using 59 PHA bins.
# Reduced chi-squared =         0.8641 for     56 degrees of freedom 
# Null hypothesis probability =   7.550953e-01
 
Photon flux (15-150 keV)    in 80 sec: 2.14402 ( -0.09869  0.09741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26738e-05 ( -5.2936e-07  5.3304e-07 ) ergs/cm2
 
Band function
 
Time interval is from  -15.168 sec. to   64.832 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.20510   ( -3.27724   -3.27724 )
beta        : -1.58754    ( -0.0892117   0.088846 )
Epeak [keV] : 24.0063      ( -24.478 185.013 )
Norm@50keV   : 102.418    ( -102.376   2431.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.26 using 59 PHA bins.
# Reduced chi-squared =         0.8593 for     55 degrees of freedom 
# Null hypothesis probability =   7.614880e-01
 
Photon flux (15-150 keV)    in 80 sec:  (    ) 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]    : 16.2533  (  )
R^2/D10^2   : 0.172233  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         235.68 using 59 PHA bins.
# Reduced chi-squared =         4.1347 for     57 degrees of freedom 
# Null hypothesis probability =   1.378199e-23
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.499e-07   6.320e-08
25- 50  3.198e-06   1.944e-07
50-150  5.939e-06   4.428e-07
15-150  9.887e-06   4.880e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 8.67726       (-0.354187     0.354184)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.77 using 59 PHA bins.
# Reduced chi-squared =         0.9784 for     57 degrees of freedom 
# Null hypothesis probability =   5.214172e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.729e-06   8.000e-08
25- 50  3.326e-06   1.676e-07
50-150  7.294e-06   3.608e-07
15-150  1.235e-05   6.160e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.83236        (-0.846843      0.922446)
R1^2/D10^2  : 1.72077        (-0.551266      0.872467)
kT2 [keV]   : 35.0476        (-5.34699      8.42597)
R2^2/D10^2  : 9.76747E-03    (-0.00471062   0.00717632)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.42 using 59 PHA bins.
# Reduced chi-squared =         0.8258 for     55 degrees of freedom 
# Null hypothesis probability =   8.180406e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.638e-06   2.240e-07
25- 50  3.422e-06   3.300e-07
50-150  7.755e-06   1.216e-06
15-150  1.282e-05   1.712e-06
Peak spectrum fit
Power-law model
 
Time interval is from    8.332 sec. to    9.332 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87721     ( -0.483246   0.54962 )
Norm@50keV  : 1.92666E-02    ( -0.00638483   0.00608031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.25 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     57 degrees of freedom 
# Null hypothesis probability =   1.879807e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.73859 ( -0.794241  0.797169 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77117e-07 ( -5.59718e-08  5.74626e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    8.332 sec. to    9.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.887210     ( -5.56723   1.28685 )
Epeak [keV] : 50.1984      ( -42.1129 -50.0816 )
Norm@50keV  : 6.75723E-02    ( -0.068985   93.6832 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.86 using 59 PHA bins.
# Reduced chi-squared =          1.176 for     56 degrees of freedom 
# Null hypothesis probability =   1.725823e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.64214 ( -0.87734  0.83945 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.64274e-07 ( -6.2616e-08  6.6058e-08 ) ergs/cm2
 
Band function
 
Time interval is from    8.332 sec. to    9.332 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.480844   ( 0.468931   0.468931 )
beta        : -2.42527    ( 2.49239   1.02554 )
Epeak [keV] : 44.5099      ( -45.081 63.3196 )
Norm@50keV   : 0.121408    ( -0.130396   6916.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.51 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     55 degrees of freedom 
# Null hypothesis probability =   1.568985e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.66079e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.1831  (-2.89222  4.10567)
R^2/D10^2   : 0.875477  (-0.875441   1.82177)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.71 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     57 degrees of freedom 
# Null hypothesis probability =   1.776396e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.295e-08   1.437e-08
25- 50  6.627e-08   4.068e-08
50-150  4.740e-08   3.262e-08
15-150  1.366e-07   8.590e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 85.1643       (-48.4674      -85.1643)
Norm        : 12.7094       (-4.44597     7.38322)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.91 using 59 PHA bins.
# Reduced chi-squared =          1.156 for     57 degrees of freedom 
# Null hypothesis probability =   1.959865e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.309e-08   2.031e-08
25- 50  5.528e-08   3.315e-08
50-150  8.131e-08   6.715e-08
15-150  1.697e-07   1.081e-07
Double BB
 
R1^2/D10^2  : 1.20653        (      )
kT2 [keV]   : 199.245        (-199.281      -199.281)
R2^2/D10^2  : 1.66318E-04    (-0.000167414   1.61182)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.93 using 59 PHA bins.
#Fit statistic : Chi-Squared =          64.95 using 59 PHA bins.
#Fit statistic : Chi-Squared =          64.81 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     55 degrees of freedom 
# Reduced chi-squared =          1.181 for     55 degrees of freedom 
# Reduced chi-squared =          1.178 for     55 degrees of freedom 
# Null hypothesis probability =   1.486113e-01
# Null hypothesis probability =   1.687224e-01
# Null hypothesis probability =   1.716000e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.076e-08   1.413e-08
25- 50  5.997e-08   3.572e-08
50-150  5.612e-08   3.812e-08
15-150  1.468e-07   8.085e-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: 1.57691     ( -0.0742833   0.0741959 )
Norm@50keV  : 1.95040E-02    ( -0.000779594   0.00077945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.13 using 59 PHA bins.
# Reduced chi-squared =         0.9321 for     57 degrees of freedom 
# Null hypothesis probability =   6.211267e-01
 
Photon flux (15-150 keV)    in 65.9 sec: 2.48877 ( -0.111261  0.111709 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20556e-05 ( -5.01214e-07  5.02141e-07 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57643     ( -0.110928   0.0734544 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.95411E-02    ( -0.000780383   0.00467623 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.15 using 59 PHA bins.
# Reduced chi-squared =         0.9490 for     56 degrees of freedom 
# Null hypothesis probability =   5.836264e-01
 
Photon flux (15-150 keV)    in 65.9 sec: 2.49112 ( -0.11466  0.05345 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20559e-05 ( -4.99852e-07  4.95963e-07 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.70878E-02   ( -1.53312   -1.53312 )
beta        : -1.61748    ( -0.127785   0.0882287 )
Epeak [keV] : 35.1667      ( -27.6657 136.76 )
Norm@50keV   : 0.268021    ( -0.266917   1199.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.56 using 59 PHA bins.
# Reduced chi-squared =         0.9374 for     55 degrees of freedom 
# Null hypothesis probability =   6.069706e-01
 
Photon flux (15-150 keV)    in 65.9 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)  = 3.23e-06
S(50-100 keV) = 4.37e-06
 T90 vs. Hardness ratio plot 
 
T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 1.35294
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.55984
Count Ratio (50-100 keV) / (15-25 keV) = 1.27888
 Mask shadow pattern 
 
IMX = -1.272480387655472E+00, IMY = -2.950394380625843E-01
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
 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:
-56.467380 -15.168000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9853 -15.6412    0.9  47.2 -167.3   1.9264  13.2    0.3	Sco X-1                       
254.3246  35.5063    9.3  12.2  -59.4   0.0983   1.2   11.8	Her X-1                       
263.0046 -24.8396    3.9  52.2  168.3   0.8902   3.0    5.6	GX 1+4                        
268.4568  -1.4474    3.4  29.0  158.9   0.3137   3.4    5.3	SW J1753.5-0127               
270.4445 -25.0044    5.8  52.6  159.8   0.8219   2.0    9.8	GX 5-1                        
270.1792 -25.7475  521.6  53.3  160.2   0.0100   0.0    6.7	GRS 1758-258                  
274.1904 -13.9194    0.0  42.2  152.7   0.2116   1.1   12.8	GX 17+2                       
288.8264  10.9372   11.3  27.8  107.6   0.1166   1.0    1.7	GRS 1915+105                  
299.5904  35.1838    0.9  30.4   52.4   1.5160  13.1    1.1	Cyg X-1                       
308.1089  40.8088   14.8  37.7   43.8   0.1299   0.8    8.6	Cyg X-3                       
270.3991  -2.8317    2.0  30.6  155.4   0.5729   5.7 ------	UNKNOWN                       
258.5448 -12.5699    3.3  40.4  175.8   0.4289   3.5 ------	UNKNOWN                       
250.4482 -10.1100    2.2  40.0 -171.3   0.5804   5.2 ------	UNKNOWN                       
223.9656  71.5699    2.5  49.6  -29.8   0.9261   4.7 ------	UNKNOWN                       
222.7348   9.1516    2.7  43.8 -120.3   1.3823   4.4 ------	UNKNOWN                       
211.8631  54.7760    2.8  47.0  -53.1   1.4382   4.1 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-15.168000 50.732600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9547 -15.6365   23.2  47.2 -167.2   0.1594   0.5    1.4	Sco X-1                       
254.5030  35.3724   15.3  12.0  -59.5  -0.1169  -0.8    2.9	Her X-1                       
262.9658 -24.7787    6.0  52.2  168.4  -1.4338  -1.9    3.1	GX 1+4                        
268.5184  -1.3342    5.9  28.9  158.7  -0.3748  -2.0   11.5	SW J1753.5-0127               
270.3232 -25.1086   15.9  52.7  160.0   0.7278   0.7    2.8	GX 5-1                        
270.2967 -25.7521   20.9  53.3  160.1   0.6348   0.6    0.6	GRS 1758-258                  
274.1685 -13.9702    4.9  42.3  152.7  -0.8739  -2.4   10.3	GX 17+2                       
288.7566  10.9006    7.5  27.7  107.8   0.3744   1.5    3.6	GRS 1915+105                  
299.4993  35.3255    6.1  30.4   52.1   0.4430   1.9    8.7	Cyg X-1                       
308.0653  41.0414   20.2  37.7   43.4   0.1883   0.6    5.7	Cyg X-3                       
264.9710 -26.5733    3.4  53.9  166.1   3.2491   3.4 ------	UNKNOWN                       
264.1950 -25.2153    0.5  52.6  166.9  17.5565  22.4 ------	UNKNOWN                       
232.1049  42.1485    2.3  30.5  -66.4   1.1527   5.1 ------	UNKNOWN                       
201.6087  74.9628    2.2  56.9  -30.0   4.4756   5.3 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
118.332610 482.892000
660.832000 722.951800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9790 -15.6392    0.2  20.4  -67.3  27.2160  60.4    0.1	Sco X-1                       
256.1465 -37.7814    3.3  14.3 -155.1   1.2798   3.5    8.5	4U 1700-377                   
256.4141 -36.4451    3.4  13.1 -152.9   1.2685   3.4    1.7	GX 349+2                      
262.9704 -24.7552    5.3   1.2  -70.0   0.9124   2.2    2.2	GX 1+4                        
264.7343 -44.5253    5.6  19.3  177.2   0.7725   2.0    4.5	4U 1735-44                    
268.3620  -1.4666    2.7  24.1    8.6   1.9220   4.2    0.9	SW J1753.5-0127               
270.3074 -25.1098    2.1   5.5   88.7   1.9486   5.3    2.2	GX 5-1                        
270.1361 -25.7501    6.0   5.4   95.4   0.7184   2.0    9.0	GRS 1758-258                  
273.9771 -14.0149    3.1  14.5   39.6   1.5253   3.7    2.1	GX 17+2                       
275.7615 -30.3713    5.2  11.5  117.8   0.8192   2.2    8.5	H1820-303                     
285.0980 -25.0563    3.0  18.9   92.4   1.8749   3.9    8.8	HT1900.1-2455                 
288.8436  11.0240    6.0  43.5   34.9   1.6838   1.9    5.4	GRS 1915+105                  
263.0092 -33.6853    5.3   8.5 -175.0   0.7943   2.2    9.0	GX 354-0                      
309.0895 -28.2987    3.0  40.0  103.1   6.1223   3.8 ------	UNKNOWN                       
304.9278 -20.3652    3.3  37.7   89.5   4.8147   3.4 ------	UNKNOWN                       
268.2991 -50.1315    3.2  25.1  172.1   1.6045   3.5 ------	UNKNOWN                       
259.7282 -82.0794    3.1  56.9  179.1   9.8392   3.7 ------	UNKNOWN                       
260.1485  27.6201    2.4  53.0   -6.2   4.9831   4.9 ------	UNKNOWN                       
251.4992   0.5910    2.8  28.6  -29.0   1.7189   4.1 ------	UNKNOWN                       
247.4027   7.9388    2.9  37.0  -30.1   2.1027   3.9 ------	UNKNOWN                       
200.4530 -73.5635    2.1  58.6 -164.4  13.4783   5.5 ------	UNKNOWN                       
Plot creation:
Sun May 31 03:02:16 EDT 2015