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Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  289.3677   -15.0878   0.0071    41.7138   163.9018         4.0752894     27.177 TRIG_00598819                 
 
Foreground time interval of the image:
-22.840  15.885 (delta_t =  38.725 [sec])
Background time interval of the image:
-239.216 -22.840 (delta_t = 216.376 [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  -22.840 sec. to  178.148 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33528     ( -0.0401106   0.0399804 )
Norm@50keV  : 6.62100E-03    ( -0.000136079   0.000135857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.43 using 59 PHA bins.
# Reduced chi-squared =         0.8322 for     57 degrees of freedom 
# Null hypothesis probability =   8.127998e-01
 
Photon flux (15-150 keV)    in 201 sec: 0.795263 ( -0.0187064  0.0187801 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30414e-05 ( -2.68763e-07  2.69043e-07 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from  -22.840 sec. to  178.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33220     (     )
Epeak [keV] : 9999.30      ( -9999.33 -9999.33 )
Norm@50keV  : 6.64740E-03    ( -0.000134768   0.000434808 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.57 using 59 PHA bins.
# Reduced chi-squared =         0.8495 for     56 degrees of freedom 
# Null hypothesis probability =   7.812283e-01
 
Photon flux (15-150 keV)    in 201 sec: 0.794736 ( -0.018516  0.0188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30379e-05 ( -2.64717e-07  2.61702e-07 ) ergs/cm2
 
Band function
 
Time interval is from  -22.840 sec. to  178.148 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05211   ( 1.05211   1.05211 )
beta        : -1.33527    ( -0.0399846   0.04011 )
Epeak [keV] : 41.3173      ( -41.3173 -41.3173 )
Norm@50keV   : 1.30599E-02    ( -0.00603425   538184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.43 using 59 PHA bins.
# Reduced chi-squared =         0.8624 for     55 degrees of freedom 
# Null hypothesis probability =   7.558695e-01
 
Photon flux (15-150 keV)    in 201 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]    : 20.1267  (  )
R^2/D10^2   : 3.27299E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         613.05 using 59 PHA bins.
# Reduced chi-squared =         10.755 for     57 degrees of freedom 
# Null hypothesis probability =   3.451875e-94
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.124e-07   2.502e-08
25- 50  2.563e-06   7.839e-08
50-150  7.704e-06   2.281e-07
15-150  1.078e-05   2.181e-07
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 3.39960       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         187.23 using 59 PHA bins.
# Reduced chi-squared =         3.2847 for     57 degrees of freedom 
# Null hypothesis probability =   8.824541e-16
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.702e-06   4.110e-08
25- 50  3.273e-06   8.040e-08
50-150  7.179e-06   1.608e-07
15-150  1.215e-05   2.774e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.18452        (-0.594826      0.626549)
R1^2/D10^2  : 0.454228        (-0.100763      0.137673)
kT2 [keV]   : 35.3022        (-2.75712      3.45977)
R2^2/D10^2  : 4.36749E-03    (-0.00111031   0.00132279)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.49 using 59 PHA bins.
# Reduced chi-squared =         0.9362 for     55 degrees of freedom 
# Null hypothesis probability =   6.094970e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.278e-06   9.638e-08
25- 50  3.056e-06   1.166e-07
50-150  8.774e-06   4.342e-07
15-150  1.311e-05   5.367e-07
Peak spectrum fit
Power-law model
 
Time interval is from  121.956 sec. to  122.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24366     ( -0.0703834   0.070413 )
Norm@50keV  : 5.12170E-02    ( -0.00200799   0.0020073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.07 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     57 degrees of freedom 
# Null hypothesis probability =   4.723094e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.05141 ( -0.242089  0.242267 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.13435e-07 ( -2.28394e-08  2.293e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from  121.956 sec. to  122.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00740     ( -0.294231   0.256629 )
Epeak [keV] : 224.843      ( -95.7815 -224.844 )
Norm@50keV  : 6.63390E-02    ( -0.0158646   0.0244595 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.95 using 59 PHA bins.
# Reduced chi-squared =         0.9812 for     56 degrees of freedom 
# Null hypothesis probability =   5.146848e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.97938 ( -0.25581  0.25557 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0508e-07 ( -2.5253e-08  2.5076e-08 ) ergs/cm2
 
Band function
 
Time interval is from  121.956 sec. to  122.956 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.776882   ( -0.344177   5.37077 )
beta        : -1.39679    ( 1.3969   0.17033 )
Epeak [keV] : 120.763      ( -84.1955 1644.06 )
Norm@50keV   : 8.96459E-02    ( -0.0352665   0.154498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.73 using 59 PHA bins.
# Reduced chi-squared =         0.9768 for     55 degrees of freedom 
# Null hypothesis probability =   5.234290e-01
 
Photon flux (15-150 keV)    in 1 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]    : 17.7594  (  )
R^2/D10^2   : 0.404370  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         168.54 using 59 PHA bins.
# Reduced chi-squared =         2.9569 for     57 degrees of freedom 
# Null hypothesis probability =   5.848140e-13
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.564e-08   1.890e-09
25- 50  1.174e-07   6.400e-09
50-150  2.678e-07   2.000e-08
15-150  4.109e-07   1.935e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 24.8922       (-0.987707     0.987573)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         107.13 using 59 PHA bins.
# Reduced chi-squared =         1.8794 for     57 degrees of freedom 
# Null hypothesis probability =   6.616242e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.200e-08   2.525e-09
25- 50  1.193e-07   5.100e-09
50-150  2.616e-07   1.070e-08
15-150  4.428e-07   1.985e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.86966        (-1.65075      1.7844)
R1^2/D10^2  : 2.44343        (-0.942427      2.01959)
kT2 [keV]   : 34.0425        (-6.72719      13.7663)
R2^2/D10^2  : 3.78772E-02    (-0.0239446   0.0419395)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.78 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     55 degrees of freedom 
# Null hypothesis probability =   2.756275e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.347e-08   6.355e-09
25- 50  1.181e-07   1.214e-08
50-150  3.442e-07   7.720e-08
15-150  5.058e-07   7.395e-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: 1.17546     ( -0.0966549   0.0951753 )
Norm@50keV  : 7.48801E-03    ( -0.000393676   0.000392017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.03 using 59 PHA bins.
# Reduced chi-squared =         0.8251 for     57 degrees of freedom 
# Null hypothesis probability =   8.240623e-01
 
Photon flux (15-150 keV)    in 38.72 sec: 0.876025 ( -0.0498639  0.0500975 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9623e-06 ( -1.55079e-07  1.55395e-07 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17407     ( -0.100262   0.0931345 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 7.52255E-03    ( -0.000391642   0.00198645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.07 using 59 PHA bins.
# Reduced chi-squared =         0.8405 for     56 degrees of freedom 
# Null hypothesis probability =   7.966625e-01
 
Photon flux (15-150 keV)    in 38.72 sec: 0.877022 ( -0.051299  0.037331 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.96162e-06 ( -1.53804e-07  1.54539e-07 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.925206   ( 0.925206   0.925206 )
beta        : -1.17546    ( -0.0951081   0.0966662 )
Epeak [keV] : 50.6913      ( -50.6913 -50.6913 )
Norm@50keV   : 1.38024E-02    ( -0.0067034   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.03 using 59 PHA bins.
# Reduced chi-squared =         0.8551 for     55 degrees of freedom 
# Null hypothesis probability =   7.689841e-01
 
Photon flux (15-150 keV)    in 38.72 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)  = 2.96e-06
S(50-100 keV) = 4.69e-06
 T90 vs. Hardness ratio plot 
 
T90                                   = 154.111999928951 sec.
Hardness ratio (energy fluence ratio) = 1.58446
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.41585
Count Ratio (50-100 keV) / (15-25 keV) = 1.21136
 Mask shadow pattern 
 
IMX = -8.564446874304327E-01, IMY = -2.471704571567579E-01
 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:
-239.216000 -22.840000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3244 -60.6096   11.8  50.1    3.2   0.4465   1.0    0.8	Cen X-3                       
186.7299 -62.7983    2.5  42.7    7.7   1.4707   4.6    2.6	GX 301-2                      
256.0208 -37.8326    1.8  22.6   98.8   1.7734   6.5    1.8	4U 1700-377                   
256.4436 -36.4107    4.5  23.7  101.3   0.7502   2.5    0.8	GX 349+2                      
262.8256 -24.7152    5.6  32.6  121.5  -0.7749  -2.1   10.2	GX 1+4                        
264.6517 -44.5791  111.3  13.5  105.6   0.0190   0.1    8.7	4U 1735-44                    
270.3416 -25.1413    3.6  30.9  134.1   0.9915   3.2    4.9	GX 5-1                        
270.3496 -25.6025    6.0  30.4  134.0   0.6063   2.0    8.8	GRS 1758-258                  
273.9621 -14.1687    3.8  41.5  141.3   1.6290   3.0    8.3	GX 17+2                       
275.9595 -30.5580    0.0  25.1  143.8   0.2650   1.2   11.6	H1820-303                     
285.1332 -25.0264   20.5  31.2  160.2   0.1565   0.6    8.3	HT1900.1-2455                 
262.7581 -33.8133    4.2  23.9  115.7  -0.7328  -2.8   11.6	GX 354-0                      
265.6340 -27.7539    1.5  29.0  124.8   2.2836   7.8 ------	UNKNOWN                       
311.0286 -11.7755    3.1  51.3 -169.7   2.1383   3.7 ------	UNKNOWN                       
 60.0640 -72.9153    2.3  49.0  -48.1   5.6383   5.1 ------	UNKNOWN                       
 29.3350 -70.9451    3.2  44.8  -59.9   4.1628   3.6 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-22.840000 15.884600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.4619 -60.6758    8.3  50.0    3.2   0.2385   1.4    5.3	Cen X-3                       
186.6552 -62.7708   61.3  42.8    7.7   0.0235   0.2    0.0	GX 301-2                      
255.9938 -37.8527  201.6  22.6   98.7  -0.0059  -0.1    0.6	4U 1700-377                   
256.4351 -36.4239   38.9  23.6  101.3   0.0307   0.3    0.1	GX 349+2                      
262.8435 -24.7948    5.2  32.5  121.5  -0.3225  -2.2    9.5	GX 1+4                        
264.9811 -44.4096    3.6  13.5  106.9  -0.2658  -3.2   10.5	4U 1735-44                    
270.1545 -25.1675    3.8  30.9  133.7   0.3719   3.0    8.8	GX 5-1                        
270.2801 -25.5591    0.0  30.5  133.9  -0.2480  -2.0   11.1	GRS 1758-258                  
274.1547 -14.0722    8.6  41.6  141.6   0.2781   1.3    8.9	GX 17+2                       
275.8653 -30.2044    5.1  25.5  143.7   0.2194   2.3   10.2	H1820-303                     
284.9841 -24.8000   37.6  31.4  159.9  -0.0319  -0.3    7.8	HT1900.1-2455                 
262.7779 -33.8635    8.1  23.8  115.7   0.1398   1.4   10.7	GX 354-0                      
233.0933 -30.2884    1.9  39.7   76.6   1.9005   6.0 ------	UNKNOWN                       
289.3678 -15.0878    0.4  41.7  163.9   4.0754  27.2 ------	UNKNOWN                       
314.9997 -50.8321    2.8  23.1 -120.5   0.3678   4.1 ------	UNKNOWN                       
319.1089 -13.4402    2.5  53.3 -159.8   1.0543   4.6 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
87.084590 962.831000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
256.0008 -37.8519    2.2  37.2   58.4   7.6824   5.3    0.8	4U 1700-377                   
256.4330 -36.3229    5.3  36.2   60.4   3.2812   2.2    6.0	GX 349+2                      
263.0202 -24.8564    6.7  26.6   76.8   1.4153   1.7    6.7	GX 1+4                        
264.7205 -44.5187    5.9  36.1   42.8  -2.1901  -2.0    4.2	4U 1735-44                    
268.2106  -1.3403    0.0  25.0  133.9   0.7411   1.0   11.6	SW J1753.5-0127               
270.3131 -25.0561    2.1  20.4   70.4   4.2024   5.6    2.1	GX 5-1                        
270.3642 -25.7431    3.4  20.7   68.6   2.4716   3.4    3.3	GRS 1758-258                  
274.0122 -13.9778    2.4  14.9  104.9   2.8332   4.8    3.5	GX 17+2                       
276.0382 -30.4226    4.2  19.6   48.8   1.6549   2.8    6.7	H1820-303                     
284.9790 -24.7784    4.9  10.5   34.9   1.6146   2.4    9.1	HT1900.1-2455                 
288.7988  10.9434    1.1  26.1 -168.8   7.0163  10.9    0.1	GRS 1915+105                  
299.5945  35.1887    0.9  51.2 -156.8  25.8510  13.2    0.8	Cyg X-1                       
262.8579 -33.9122   10.6  30.4   59.5   1.1301   1.1    8.0	GX 354-0                      
265.6515 -27.7351    1.0  25.4   68.7   9.4221  11.7 ------	UNKNOWN                       
277.3451 -23.8020    1.8  14.3   63.1   3.9439   6.5 ------	UNKNOWN                       
282.1905 -32.3210    2.2  18.4   32.0   3.1714   5.2 ------	UNKNOWN                       
279.9270   1.2949    2.9  18.9  162.0   2.3874   4.0 ------	UNKNOWN                       
289.3712 -15.0994    0.4   0.0  170.6  15.7951  25.8 ------	UNKNOWN                       
302.7586 -19.3199    2.4  13.4  -57.4   2.7460   4.7 ------	UNKNOWN                       
326.0010 -24.2911    3.9  35.6  -56.8   3.1924   3.0 ------	UNKNOWN                       
301.6130  41.6594    3.9  57.9 -156.8  14.5217   2.9 ------	UNKNOWN                       
	UNKNOWN                       
	UNKNOWN                       
Plot creation:
Sat May 30 13:34:12 EDT 2015