Special notes of this burst
Image
Pre-slew 15.0-350.0 keV image (Event data)
 
#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   76.7210    12.8281   0.0047    13.2344   174.8520         1.2622871     40.954 TRIG_00614390                 
 
Foreground time interval of the image:
 -0.844   5.344 (delta_t =   6.188 [sec])
Background time interval of the image:
-102.307  -0.844 (delta_t = 101.463 [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 0.256000
 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 0.256000
 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 0.256000
 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   -0.844 sec. to    5.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85450     ( -0.0820631   0.083047 )
Norm@50keV  : 1.17441E-02    ( -0.000561676   0.000558178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.50 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.845653e-01
 
Photon flux (15-150 keV)    in 6.188 sec: 1.65377 ( -0.0751262  0.0752748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.68168e-07 ( -3.20345e-08  3.22001e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -0.844 sec. to    5.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47991     ( -0.357567   0.328651 )
Epeak [keV] : 64.3611      ( -13.1139 105.787 )
Norm@50keV  : 1.85520E-02    ( -0.00600013   0.00994134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.68 using 59 PHA bins.
# Reduced chi-squared =         0.9943 for     56 degrees of freedom 
# Null hypothesis probability =   4.869173e-01
 
Photon flux (15-150 keV)    in 6.188 sec: 1.61667 ( -0.08148  0.08153 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.44808e-07 ( -3.78767e-08  3.79943e-08 ) ergs/cm2
 
Band function
 
Time interval is from   -0.844 sec. to    5.344 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.87284   ( -6.09394   -4.87284 )
beta        : -1.91572    ( -0.0939278   0.0912294 )
Epeak [keV] : 22.1494      ( -3.1819 2.61485 )
Norm@50keV   : 2864.13    ( -123.892   9248.59 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9871 for     55 degrees of freedom 
# Null hypothesis probability =   5.016474e-01
 
Photon flux (15-150 keV)    in 6.188 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.47389e-07 ( -6.47345e-07  -3.77332e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.9212  (  )
R^2/D10^2   : 0.387917  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         161.36 using 59 PHA bins.
# Reduced chi-squared =         2.8309 for     57 degrees of freedom 
# Null hypothesis probability =   6.538857e-12
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.211e-08   5.755e-09
25- 50  2.252e-07   1.163e-08
50-150  1.916e-07   1.915e-08
15-150  4.889e-07   2.472e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 93.3781       (-14.0841      18.4849)
Norm        : 7.32978       (-0.492791     0.54219)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.30 using 59 PHA bins.
# Reduced chi-squared =         0.9877 for     57 degrees of freedom 
# Null hypothesis probability =   5.013344e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.185e-07   9.251e-09
25- 50  2.020e-07   9.839e-09
50-150  3.145e-07   8.905e-08
15-150  6.349e-07   8.505e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.22341        (-0.948037      1.06935)
R1^2/D10^2  : 2.98216        (-1.2419      2.48903)
kT2 [keV]   : 21.0201        (-3.05214      4.76803)
R2^2/D10^2  : 3.45019E-02    (-0.0189468   0.0307603)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.17 using 59 PHA bins.
# Reduced chi-squared =          1.076 for     55 degrees of freedom 
# Null hypothesis probability =   3.260842e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.177e-07   1.881e-08
25- 50  1.994e-07   2.299e-08
50-150  3.132e-07   5.975e-08
15-150  6.303e-07   8.428e-08
Peak spectrum fit
Power-law model
 
Time interval is from   -0.056 sec. to    0.944 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68888     ( -0.0686357   0.0691102 )
Norm@50keV  : 4.63432E-02    ( -0.00188675   0.00188183 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.41 using 59 PHA bins.
# Reduced chi-squared =          1.358 for     57 degrees of freedom 
# Null hypothesis probability =   3.731664e-02
 
Photon flux (15-150 keV)    in 1 sec: 6.13118 ( -0.25122  0.251602 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.29473e-07 ( -1.82741e-08  1.83248e-08 ) ergs/cm2
 
Cutoff power-law model
 
Time interval is from   -0.056 sec. to    0.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10958     ( -0.312943   0.290382 )
Epeak [keV] : 75.3293      ( -11.5038 27.6376 )
Norm@50keV  : 9.16060E-02    ( -0.0259727   0.0398387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.97 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     56 degrees of freedom 
# Null hypothesis probability =   1.925730e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.95166 ( -0.26553  0.26572 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.11523e-07 ( -2.0448e-08  2.0414e-08 ) ergs/cm2
 
Band function
 
Time interval is from   -0.056 sec. to    0.944 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.681851   ( -0.552041   1.05405 )
beta        : -2.01105    ( 2.00967   0.197365 )
Epeak [keV] : 55.4879      ( -17.1015 25.9041 )
Norm@50keV   : 0.167562    ( -0.0890446   0.747775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.27 using 59 PHA bins.
# Reduced chi-squared =          1.132 for     55 degrees of freedom 
# Null hypothesis probability =   2.333400e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12858e-07 ( -4.12851e-07  -1.9485e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.4750  (  )
R^2/D10^2   : 0.976730  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         176.06 using 59 PHA bins.
# Reduced chi-squared =         3.0888 for     57 degrees of freedom 
# Null hypothesis probability =   4.436658e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.757e-08   2.800e-09
25- 50  1.344e-07   6.200e-09
50-150  1.575e-07   1.260e-08
15-150  3.294e-07   1.410e-08
Thermal bremsstrahlung (OTTB)
 
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 138.673       (-23.6532      27.0991)
Norm        : 25.4207       (-1.21451     1.46518)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.73 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.002591e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.569e-08   4.695e-09
25- 50  1.203e-07   7.750e-09
50-150  2.297e-07   6.120e-08
15-150  4.157e-07   6.620e-08
Double BB
 
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.57753        (-1.20267      1.25731)
R1^2/D10^2  : 5.12036        (-1.88156      3.76881)
kT2 [keV]   : 24.6836        (-4.01442      6.65147)
R2^2/D10^2  : 7.59458E-02    (-0.0447935   0.079561)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.28 using 59 PHA bins.
# Reduced chi-squared =          1.241 for     55 degrees of freedom 
# Null hypothesis probability =   1.076772e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.900e-08   7.930e-09
25- 50  1.265e-07   1.410e-08
50-150  2.241e-07   4.405e-08
15-150  4.097e-07   6.000e-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: 1.85450     ( -0.0820631   0.083047 )
Norm@50keV  : 1.17441E-02    ( -0.000561676   0.000558178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.50 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.845653e-01
 
Photon flux (15-150 keV)    in 6.188 sec: 1.65377 ( -0.0751262  0.0752748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.68168e-07 ( -3.20345e-08  3.22001e-08 ) ergs/cm2
 
Cutoff power-law model
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47991     ( -0.357567   0.328651 )
Epeak [keV] : 64.3611      ( -13.1139 105.787 )
Norm@50keV  : 1.85520E-02    ( -0.00600013   0.00994134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.68 using 59 PHA bins.
# Reduced chi-squared =         0.9943 for     56 degrees of freedom 
# Null hypothesis probability =   4.869173e-01
 
Photon flux (15-150 keV)    in 6.188 sec: 1.61667 ( -0.08148  0.08153 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.44808e-07 ( -3.78767e-08  3.79943e-08 ) ergs/cm2
 
Band function
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.87284   ( -6.09394   -4.87284 )
beta        : -1.91572    ( -0.0939278   0.0912294 )
Epeak [keV] : 22.1494      ( -3.1819 2.61485 )
Norm@50keV   : 2864.13    ( -123.892   9248.59 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9871 for     55 degrees of freedom 
# Null hypothesis probability =   5.016474e-01
 
Photon flux (15-150 keV)    in 6.188 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.47389e-07 ( -6.47345e-07  -3.77332e-08 ) ergs/cm2
 
 S(25-50 keV) vs. S(50-100 keV) plot 
 
S(25-50 keV)  = 1.92e-07
S(50-100 keV) = 2.12e-07
 T90 vs. Hardness ratio plot 
 
T90                                   = 3.92399996519089 sec.
Hardness ratio (energy fluence ratio) = 1.10417
 Color vs. Color plot 
 
Count Ratio  (25-50 keV) / (15-25 keV) = 1.08769
Count Ratio (50-100 keV) / (15-25 keV) = 0.619508
 Mask shadow pattern 
 
IMX = -2.342332408229152E-01, IMY = -2.110245017262507E-02
 TIME vs. PHA plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
 TIME vs. DetID plot around the trigger time 
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
 100 us light curve (15-350 keV)
 
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
 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:
-102.307400 -0.844000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6220  22.0127    0.3  22.7 -164.1   4.4190  36.9    0.6	Crab                          
 81.8001 -57.1749    2.8  57.0    3.0   2.9219   4.1 ------	UNKNOWN                       
 86.7492 -28.4196    2.4  29.2   -9.2   0.6427   4.8 ------	UNKNOWN                       
 96.1446 -53.5830    2.8  55.2   -7.5   1.6548   4.2 ------	UNKNOWN                       
 97.9350  -9.0938    2.3  20.8  -59.4   0.6692   5.1 ------	UNKNOWN                       
 99.2575   3.2066    2.7  20.5  -95.0   0.5522   4.3 ------	UNKNOWN                       
 Pre-slew background subtracted image of 15-350 keV band 
Time interval of the image:
-0.844000 5.344000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6439  21.9987   11.8  22.7 -164.1  -0.0306  -1.0    1.1	Crab                          
 46.3326 -36.1499    2.5  47.0   41.4   0.6721   4.7 ------	UNKNOWN                       
 67.9811 -51.5055    2.3  52.1   13.5   0.6527   5.1 ------	UNKNOWN                       
 76.7210  12.8281    0.3  13.2  174.9   1.2622  41.0 ------	UNKNOWN                       
113.5932  -6.2034    2.3  35.0  -74.6   0.3041   5.1 ------	UNKNOWN                       
 Post-slew image of 15-350 keV band 
Time interval of the image:
44.092590 963.001500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6252  22.0121    0.2  11.3 -144.5  38.8168  61.8    0.5	Crab                          
 81.8024  30.7491    3.1  18.5 -165.2   2.1517   3.8 ------	UNKNOWN                       
101.1793  69.5536    3.6  58.8 -169.3  13.1223   3.2 ------	UNKNOWN                       
Plot creation:
Thu May 28 14:16:38 EDT 2015