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
247.0289 15.5427 0.0088 16.0596 -159.3538 1.1467217 21.934 TRIG_00382399
Foreground time interval of the image:
-9.464 8.536 (delta_t = 18.000 [sec])
Background time interval of the image:
-239.464 -9.464 (delta_t = 230.000 [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 0.512000
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 0.512000
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 0.512000
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 -9.464 sec. to 8.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74492 ( -0.129898 0.13239 )
Norm@50keV : 4.07430E-03 ( -0.000310386 0.000306276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9718 for 57 degrees of freedom
# Null hypothesis probability = 5.355467e-01
Photon flux (15-150 keV) in 18 sec: 0.549885 ( -0.0364177 0.0364576 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76913e-07 ( -5.35793e-08 5.44473e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.464 sec. to 8.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69868 ( -0.524713 0.560128 )
Epeak [keV] : 285.997 ( )
Norm@50keV : 4.32020E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9889 for 56 degrees of freedom
# Null hypothesis probability = 4.983580e-01
Photon flux (15-150 keV) in 18 sec: 0.548280 ( -0.039595 0.037705 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.73202e-07 ( -6.79032e-08 5.72742e-08 ) ergs/cm2
Band function
Time interval is from -9.464 sec. to 8.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.04233 ( 1.15051 1.15051 )
beta : -1.84077 ( 1.83909 0.201412 )
Epeak [keV] : 44.5147 ( -44.6391 -44.6391 )
Norm@50keV : 1.15945E-02 ( -0.0120973 625.169 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9910 for 55 degrees of freedom
# Null hypothesis probability = 4.933966e-01
Photon flux (15-150 keV) in 18 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] : 11.1935 (-0.951664 1.07424)
R^2/D10^2 : 0.163706 (-0.0471448 0.0646385)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.18 using 59 PHA bins.
# Reduced chi-squared = 1.8627 for 57 degrees of freedom
# Null hypothesis probability = 8.401324e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.739e-08 9.657e-09
25- 50 2.238e-07 1.620e-08
50-150 1.605e-07 3.037e-08
15-150 4.616e-07 3.816e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 121.480 (-35.1021 48.6346)
Norm : 2.28275 (-0.188423 0.267386)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.648719e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.070e-07 1.036e-08
25- 50 1.918e-07 1.958e-08
50-150 3.443e-07 1.301e-07
15-150 6.430e-07 1.493e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32074 (-1.24716 1.25062)
R1^2/D10^2 : 0.613636 (-0.251062 0.303257)
kT2 [keV] : 31.9068 (-9.58447 24.6064)
R2^2/D10^2 : 2.87452E-03 (-0.00227216 0.00691244)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.80 using 59 PHA bins.
# Reduced chi-squared = 0.9963 for 55 degrees of freedom
# Null hypothesis probability = 4.824117e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.073e-07 2.248e-08
25- 50 1.983e-07 3.786e-08
50-150 3.797e-07 1.792e-07
15-150 6.854e-07 2.102e-07
Peak spectrum fit
Power-law model
Time interval is from 0.536 sec. to 1.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58441 ( -0.166413 0.16951 )
Norm@50keV : 1.40874E-02 ( -0.00143593 0.00141652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.21 using 59 PHA bins.
# Reduced chi-squared = 0.8633 for 57 degrees of freedom
# Null hypothesis probability = 7.588303e-01
Photon flux (15-150 keV) in 1 sec: 1.80166 ( -0.165461 0.165497 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32003e-07 ( -1.46379e-08 1.49108e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.536 sec. to 1.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36552 ( -0.725861 0.321993 )
Epeak [keV] : 129.765 ( -129.795 -129.795 )
Norm@50keV : 1.86127E-02 ( -0.00725527 0.027866 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.87 using 59 PHA bins.
# Reduced chi-squared = 0.8726 for 56 degrees of freedom
# Null hypothesis probability = 7.393018e-01
Photon flux (15-150 keV) in 1 sec: 1.78278 ( -0.17461 0.17255 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.285e-07 ( -1.7927e-08 1.6959e-08 ) ergs/cm2
Band function
Time interval is from 0.536 sec. to 1.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92226 ( -5.91966 -4.92226 )
beta : -1.72424 ( -0.260654 0.201999 )
Epeak [keV] : 24.9078 ( -9.90084 9.90084 )
Norm@50keV : 1479.38 ( -134.722 8944.01 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.92 using 59 PHA bins.
# Reduced chi-squared = 0.8349 for 55 degrees of freedom
# Null hypothesis probability = 8.034614e-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] : 12.0850 (-1.41981 1.67028)
R^2/D10^2 : 0.424284 (-0.157935 0.242823)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.72 using 59 PHA bins.
# Reduced chi-squared = 1.293 for 57 degrees of freedom
# Null hypothesis probability = 6.740147e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.311e-08 2.398e-09
25- 50 4.161e-08 4.615e-09
50-150 3.671e-08 7.995e-09
15-150 9.144e-08 1.088e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 169.154 (-64.9223 -169.086)
Norm : 7.37910 (-0.713671 0.826258)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.85 using 59 PHA bins.
# Reduced chi-squared = 0.8569 for 57 degrees of freedom
# Null hypothesis probability = 7.704283e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.874e-08 9.413e-09
25- 50 3.531e-08 1.852e-08
50-150 7.309e-08 4.064e-08
15-150 1.271e-07 6.691e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71053 (-1.86167 1.98154)
R1^2/D10^2 : 1.61349 (-0.824584 2.22621)
kT2 [keV] : 33.4138 (-12.6623 82.4612)
R2^2/D10^2 : 8.98073E-03 (-0.00815425 0.0372773)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8503 for 55 degrees of freedom
# Null hypothesis probability = 7.773719e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.832e-08 5.668e-09
25- 50 3.706e-08 1.134e-08
50-150 7.708e-08 3.974e-08
15-150 1.325e-07 5.386e-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: 1.74492 ( -0.129898 0.13239 )
Norm@50keV : 4.07430E-03 ( -0.000310386 0.000306276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9718 for 57 degrees of freedom
# Null hypothesis probability = 5.355467e-01
Photon flux (15-150 keV) in 18 sec: 0.549885 ( -0.0364177 0.0364576 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76913e-07 ( -5.35793e-08 5.44473e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69868 ( -0.524713 0.560128 )
Epeak [keV] : 285.997 ( )
Norm@50keV : 4.32020E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9889 for 56 degrees of freedom
# Null hypothesis probability = 4.983580e-01
Photon flux (15-150 keV) in 18 sec: 0.548280 ( -0.039595 0.037705 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.73202e-07 ( -6.79032e-08 5.72742e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.04233 ( 1.15051 1.15051 )
beta : -1.84077 ( 1.83909 0.201412 )
Epeak [keV] : 44.5147 ( -44.6391 -44.6391 )
Norm@50keV : 1.15945E-02 ( -0.0120973 625.277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9910 for 55 degrees of freedom
# Null hypothesis probability = 4.933966e-01
Photon flux (15-150 keV) in 18 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) = 1.87e-07
S(50-100 keV) = 2.23e-07
T90 vs. Hardness ratio plot
T90 = 14 sec.
Hardness ratio (energy fluence ratio) = 1.19251
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.22492
Count Ratio (50-100 keV) / (15-25 keV) = 0.692959
Mask shadow pattern
IMX = -2.693824269417192E-01, IMY = 1.015023599969543E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-239.464000 -9.464000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9820 -15.6339 0.4 26.1 -65.4 8.9686 30.5 0.4 Sco X-1
254.4534 35.3263 8.3 34.2 174.4 0.4351 1.4 1.0 Her X-1
268.3707 -1.4173 6.4 36.5 -115.3 0.8524 1.8 2.1 SW J1753.5-0127
213.2346 39.3218 3.3 36.4 116.1 2.0327 3.5 ------ UNKNOWN
261.6320 54.9962 2.9 52.8 162.3 4.0836 4.1 ------ UNKNOWN
256.8271 -19.6603 3.0 36.0 -78.6 1.9418 3.9 ------ UNKNOWN
262.5379 -15.3096 2.4 37.2 -90.2 3.0587 4.9 ------ UNKNOWN
270.9866 -9.8699 2.3 41.8 -104.0 4.9854 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.464000 8.536000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1677 -15.5986 5.8 26.1 -65.8 0.1395 2.0 11.2 Sco X-1
254.2688 35.2849 6.8 34.0 174.2 0.1213 1.7 9.9 Her X-1
268.2504 -1.3675 11.6 36.4 -115.3 -0.1023 -1.0 8.7 SW J1753.5-0127
198.8071 12.4915 2.2 33.9 63.3 0.5260 5.2 ------ UNKNOWN
247.0289 15.5427 0.5 16.1 -159.4 1.1467 21.9 ------ UNKNOWN
274.9814 21.5880 2.1 43.0 -151.8 0.5028 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
47.236600 962.588500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9766 -15.6376 0.2 31.3 -34.8 32.0482 46.5 0.2 Sco X-1
254.7089 35.3538 35.2 21.0 159.1 -0.2192 -0.3 12.3 Her X-1
263.0536 -24.8940 202.3 43.4 -60.0 -0.1324 -0.1 9.2 GX 1+4
268.3929 -1.5251 3.4 27.2 -91.6 2.8021 3.4 4.6 SW J1753.5-0127
274.1525 -13.9979 3.8 39.9 -82.2 7.5205 3.0 8.8 GX 17+2
288.7892 10.9751 2.0 40.8 -127.5 7.7399 5.9 1.8 GRS 1915+105
299.5909 35.1968 0.6 50.7 -161.7 31.6408 20.1 0.3 Cyg X-1
307.9733 40.8522 8.1 58.0 -167.4 4.6786 1.6 8.7 Cyg X-3
213.9222 44.1664 7.2 40.0 103.8 4.5587 1.6 ------ UNKNOWN
205.4097 6.0197 4.9 41.9 42.9 4.7318 2.4 ------ UNKNOWN
297.9000 34.7916 3.0 49.3 -161.5 5.2671 3.9 ------ UNKNOWN
237.0392 -29.8797 3.7 46.4 -26.7 3.7905 3.1 ------ UNKNOWN
296.0178 13.1376 2.7 47.4 -132.3 9.7768 4.3 ------ UNKNOWN
268.0451 -22.3333 1.3 43.1 -67.7 28.2532 8.8 ------ UNKNOWN
282.0096 -6.8690 2.9 41.3 -98.3 9.4750 4.0 ------ UNKNOWN
Plot creation:
Sun May 31 02:23:50 EDT 2015