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Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  237.0369   -15.9708   0.0134    31.2844   -40.4363         1.0985708     14.324 TRIG_00355942                 
 
Foreground time interval of the image:
-25.092   3.992 (delta_t =  29.084 [sec])
Background time interval of the image:
-239.896 -25.092 (delta_t = 214.804 [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  -25.092 sec. to    3.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37950     ( -0.198477   0.19625 )
Norm@50keV  : 2.48626E-03    ( -0.0002598   0.000259618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.95 using 59 PHA bins.
# Reduced chi-squared =         0.7886 for     57 degrees of freedom 
# Null hypothesis probability =   8.761089e-01
 
Photon flux (15-150 keV)    in 29.08 sec: 0.301401 ( -0.0333446  0.0334797 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.01604e-07 ( -7.9947e-08  8.05077e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from  -25.092 sec. to    3.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37587     ( -0.199845   0.197827 )
Epeak [keV] : 9999.29      ( -9999.36 -9999.36 )
Norm@50keV  : 2.49537E-03    ( -0.00249535   0.00151991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.97 using 59 PHA bins.
# Reduced chi-squared =         0.8029 for     56 degrees of freedom 
# Null hypothesis probability =   8.545572e-01
 
Photon flux (15-150 keV)    in 29.08 sec: 0.302093 ( -0.034061  0.032738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.98129e-07 ( -7.68003e-08  8.26715e-08 ) ergs/cm2
 
Band function
 
Time interval is from  -25.092 sec. to    3.992 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.91021   ( -4.91021   -4.91021 )
beta        : -1.41265    ( -0.216063   0.209745 )
Epeak [keV] : 22.4941      ( -22.4941 6.77159 )
Norm@50keV   : 382.149    ( -39.8283   1.06832e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.56 using 59 PHA bins.
# Reduced chi-squared =         0.8102 for     55 degrees of freedom 
# Null hypothesis probability =   8.417945e-01
 
Photon flux (15-150 keV)    in 29.08 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]    : 18.6660  (-2.81585  3.42426)
R^2/D10^2   : 1.58579E-02  (-0.00680306   0.011812)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.16 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     57 degrees of freedom 
# Null hypothesis probability =   4.588787e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.178e-08   7.299e-09
25- 50  1.509e-07   2.822e-08
50-150  3.851e-07   7.808e-08
15-150  5.678e-07   8.506e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.25084       (-0.13162     0.131594)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.05 using 59 PHA bins.
# Reduced chi-squared =         0.8605 for     57 degrees of freedom 
# Null hypothesis probability =   7.639283e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.058e-08   2.162e-08
25- 50  1.743e-07   8.763e-08
50-150  3.822e-07   2.089e-07
15-150  6.470e-07   3.263e-07
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.07050        (-1.36562      1.84397)
R1^2/D10^2  : 0.559131        (-0.353669      1.01155)
kT2 [keV]   : 30.7953        (-6.85771      13.4985)
R2^2/D10^2  : 2.67099E-03    (-0.0017601   0.00340852)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.04 using 59 PHA bins.
# Reduced chi-squared =         0.7644 for     55 degrees of freedom 
# Null hypothesis probability =   9.004069e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.229e-08   4.724e-08
25- 50  1.535e-07   5.563e-08
50-150  4.764e-07   2.288e-07
15-150  7.222e-07   2.759e-07
Peak spectrum fit
Power-law model
 
Time interval is from    0.052 sec. to    1.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44642     ( -0.221175   0.221478 )
Norm@50keV  : 1.19734E-02    ( -0.00158239   0.00157672 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.16 using 59 PHA bins.
# Reduced chi-squared =         0.8625 for     57 degrees of freedom 
# Null hypothesis probability =   7.604187e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.47425 ( -0.196336  0.196836 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14653e-07 ( -1.64849e-08  1.6688e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from    0.052 sec. to    1.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.716491     ( -1.10591   0.818785 )
Epeak [keV] : 86.8606      ( -27.0991 -86.8607 )
Norm@50keV  : 2.81887E-02    ( -0.0169891   0.0728312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.17 using 59 PHA bins.
# Reduced chi-squared =         0.8423 for     56 degrees of freedom 
# Null hypothesis probability =   7.935652e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.42882 ( -0.20431  0.20436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08251e-07 ( -1.83653e-08  1.8519e-08 ) ergs/cm2
 
Band function
 
Time interval is from    0.052 sec. to    1.052 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.51245   ( -6.11636   -4.51245 )
beta        : -1.64649    ( -0.317919   0.283889 )
Epeak [keV] : 30.1794      ( -8.95351 7.6381 )
Norm@50keV   : 188.043    ( -24.2059   4.37067e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.51 using 59 PHA bins.
# Reduced chi-squared =         0.8456 for     55 degrees of freedom 
# Null hypothesis probability =   7.855061e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.42768 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10565e-07 ( -1.10558e-07  -1.71984e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.9560  (-2.25138  2.77659)
R^2/D10^2   : 0.172315  (-0.0777626   0.134624)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.70 using 59 PHA bins.
# Reduced chi-squared =         0.9772 for     57 degrees of freedom 
# Null hypothesis probability =   5.238541e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.073e-09   1.926e-09
25- 50  3.199e-08   6.460e-09
50-150  4.864e-08   1.300e-08
15-150  8.870e-08   1.756e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-74.3223      -199.363)
Norm        : 6.09264       (-0.788327     0.789817)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.45 using 59 PHA bins.
# Reduced chi-squared =         0.8499 for     57 degrees of freedom 
# Null hypothesis probability =   7.828469e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.517e-08   8.500e-09
25- 50  2.918e-08   1.617e-08
50-150  6.401e-08   3.581e-08
15-150  1.084e-07   6.015e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.38487        (-3.33789      3.96029)
R1^2/D10^2  : 0.809654        (-0.517001      3.1181)
kT2 [keV]   : 27.7469        (-22.7004      95.6577)
R2^2/D10^2  : 1.44191E-02    (-0.0138636   0.062876)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.25 using 59 PHA bins.
# Reduced chi-squared =         0.8409 for     55 degrees of freedom 
# Null hypothesis probability =   7.935222e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.245e-08   7.100e-09
25- 50  3.102e-08   1.631e-08
50-150  6.677e-08   3.748e-08
15-150  1.102e-07   5.700e-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: 1.37950     ( -0.198477   0.19625 )
Norm@50keV  : 2.48626E-03    ( -0.0002598   0.000259618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.95 using 59 PHA bins.
# Reduced chi-squared =         0.7886 for     57 degrees of freedom 
# Null hypothesis probability =   8.761089e-01
 
Photon flux (15-150 keV)    in 29.08 sec: 0.301401 ( -0.0333446  0.0334797 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.01604e-07 ( -7.9947e-08  8.05077e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37587     ( -0.199845   0.197827 )
Epeak [keV] : 9999.29      ( -9999.36 -9999.36 )
Norm@50keV  : 2.49537E-03    ( -0.00249535   0.00151991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.97 using 59 PHA bins.
# Reduced chi-squared =         0.8029 for     56 degrees of freedom 
# Null hypothesis probability =   8.545572e-01
 
Photon flux (15-150 keV)    in 29.08 sec: 0.302093 ( -0.03406  0.032738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.98129e-07 ( -7.68003e-08  8.26715e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.91021   ( -4.91021   -4.91021 )
beta        : -1.41265    ( -0.216063   0.209745 )
Epeak [keV] : 22.4941      ( -22.4941 6.77159 )
Norm@50keV   : 382.149    ( -39.8283   1.06832e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.56 using 59 PHA bins.
# Reduced chi-squared =         0.8102 for     55 degrees of freedom 
# Null hypothesis probability =   8.417945e-01
 
Photon flux (15-150 keV)    in 29.08 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)  = 1.63e-07
S(50-100 keV) = 2.51e-07
 T90 vs. Hardness ratio plot 
 
T90                                   = 24.944000005722 sec.
Hardness ratio (energy fluence ratio) = 1.53988
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.24989
Count Ratio (50-100 keV) / (15-25 keV) = 1.24069
 Mask shadow pattern 
 
IMX = 4.624901037000976E-01, IMY = 3.941150020758289E-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:
-239.896000 -25.092000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9828 -15.6480    0.3  25.6  -29.5   6.2874  34.2    0.5	Sco X-1                       
255.9961 -37.8480    3.7  10.3 -100.8   0.5867   3.1    0.5	4U 1700-377                   
256.4227 -36.4094    4.2   9.4  -94.2   0.5291   2.7    1.0	GX 349+2                      
263.1038 -24.7919    3.6   8.0    2.3   0.5755   3.3    5.9	GX 1+4                        
264.7357 -44.2895    4.7  12.2 -148.5   0.4140   2.4    9.6	4U 1735-44                    
268.3092  -1.4786    3.1  30.8   28.8   0.9363   3.7    3.9	SW J1753.5-0127               
270.2738 -25.0657    2.0   7.8   50.9   1.0220   5.8    1.0	GX 5-1                        
270.2148 -25.7557    2.6   7.2   52.7   0.8128   4.5    4.8	GRS 1758-258                  
274.1050 -13.9109    6.0  19.5   47.8   0.3563   1.9    9.5	GX 17+2                       
275.9228 -30.3050    2.5   8.2  104.5   0.7858   4.6    3.7	H1820-303                     
285.0466 -24.7857  125.3  17.8   95.5  -0.0195  -0.1    8.1	HT1900.1-2455                 
263.0095 -33.7945    2.7   3.4  -93.9   0.7831   4.3    2.6	GX 354-0                      
314.7781 -26.7394    2.4  42.0  120.8   3.4014   4.8 ------	UNKNOWN                       
277.5703 -23.8230    2.4  12.8   77.4   0.8729   4.7 ------	UNKNOWN                       
249.6566  19.6266    2.7  54.3    5.7   2.9084   4.3 ------	UNKNOWN                       
255.1453 -41.7102    2.0  13.2 -114.2   1.1641   5.8 ------	UNKNOWN                       
354.5567 -75.6645    2.6  58.4 -171.5   4.7639   4.4 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-25.092000 3.992000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9683 -15.4890    5.2  25.8  -29.3   0.1425   2.2    9.1	Sco X-1                       
255.8690 -38.0323    0.0  10.5 -101.4   0.0575   1.0   12.6	4U 1700-377                   
256.3510 -36.6041    5.0   9.5  -95.1   0.1332   2.3   11.6	GX 349+2                      
262.8451 -24.7758    8.8   8.1    0.7   0.0732   1.3    9.1	GX 1+4                        
264.8061 -44.2675    5.5  12.1 -148.7  -0.1207  -2.1   11.3	4U 1735-44                    
268.2219  -1.4669    5.8  30.8   28.6  -0.1511  -2.0    8.8	SW J1753.5-0127               
270.3302 -25.0987    5.9   7.8   51.3  -0.1077  -1.9    2.8	GX 5-1                        
270.2703 -25.8046    3.5   7.2   53.3  -0.1871  -3.3    4.1	GRS 1758-258                  
273.9427 -14.2229    4.8  19.2   47.6   0.1592   2.4   11.8	GX 17+2                       
275.9957 -30.5034   10.0   8.2  106.0  -0.0628  -1.1    9.0	H1820-303                     
285.0619 -25.0221    6.6  17.7   96.2   0.1131   1.7    6.3	HT1900.1-2455                 
262.7917 -33.7425    3.8   3.5  -91.8  -0.1777  -3.1   11.3	GX 354-0                      
237.0369 -15.9708    0.8  31.3  -40.4   1.0988  14.3 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
194.604600 882.804600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3121 -60.6244    4.1  42.8  -25.1   1.8090   2.8    0.1	Cen X-3                       
186.6338 -62.8007    2.2  38.9  -14.4   2.8956   5.4    1.9	GX 301-2                      
264.7477 -44.5013   11.4  39.2   62.9   1.2507   1.0    3.1	4U 1735-44                    
296.1963 -36.8415    3.0  40.4  102.2   6.0122   3.9 ------	UNKNOWN                       
353.6936 -53.3783    3.3  25.2 -178.0   1.4112   3.5 ------	UNKNOWN                       
 27.8627 -38.5963    3.0  46.8 -147.3   3.6466   3.8 ------	UNKNOWN                       
Plot creation:
Sun May 31 03:41:56 EDT 2015