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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.4646 -6.9086 0.0126 7.1648 6.5135 0.6672551 15.189 TRIG_00317662
Foreground time interval of the image:
-0.232 18.341 (delta_t = 18.573 [sec])
Background time interval of the image:
-239.360 -0.232 (delta_t = 239.128 [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 -0.232 sec. to 18.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71851 ( -0.20461 0.209822 )
Norm@50keV : 1.95791E-03 ( -0.000251042 0.00024667 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.82 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 57 degrees of freedom
# Null hypothesis probability = 2.939261e-02
Photon flux (15-150 keV) in 18.94 sec: 0.261737 ( -0.0297747 0.0297955 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42867e-07 ( -4.55319e-08 4.64892e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 18.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43189 ( -0.996239 0.479939 )
Epeak [keV] : 85.5391 ( -44.1116 -85.5781 )
Norm@50keV : 2.84571E-03 ( -0.00284484 0.00787705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.44 using 59 PHA bins.
# Reduced chi-squared = 1.401 for 56 degrees of freedom
# Null hypothesis probability = 2.557869e-02
Photon flux (15-150 keV) in 18.94 sec: 0.258288 ( -0.031303 0.030826 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3074e-07 ( -5.77784e-08 5.52726e-08 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 18.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.729301 ( -2.71197 -0.742591 )
beta : -2.13617 ( -0.628408 0.408618 )
Epeak [keV] : 37.3260 ( -10.5484 25.7027 )
Norm@50keV : 7.28262E-02 ( -0.0790112 32.2939 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.66 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.999528e-02
Photon flux (15-150 keV) in 18.94 sec: 0.251467 ( ) 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] : 10.2864 (-1.23755 1.53543)
R^2/D10^2 : 0.111052 (-0.0456605 0.0702361)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.22 using 59 PHA bins.
# Reduced chi-squared = 1.583 for 57 degrees of freedom
# Null hypothesis probability = 3.318865e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.574e-08 9.792e-09
25- 50 1.183e-07 1.867e-08
50-150 6.695e-08 1.947e-08
15-150 2.310e-07 3.970e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 116.944 (-44.7027 -116.057)
Norm : 1.11616 (-0.148229 0.209682)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.43 using 59 PHA bins.
# Reduced chi-squared = 1.376 for 57 degrees of freedom
# Null hypothesis probability = 3.142033e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.512e-08 8.760e-09
25- 50 9.816e-08 1.808e-08
50-150 1.729e-07 8.316e-08
15-150 3.262e-07 1.053e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.09889 (-1.27143 1.35629)
R1^2/D10^2 : 0.228788 (-0.0981506 0.140181)
kT2 [keV] : 45.0436 (-19.8086 -45.7649)
R2^2/D10^2 : 4.66345E-04 (-0.000442873 0.00199641)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.36 using 59 PHA bins.
# Reduced chi-squared = 1.279 for 55 degrees of freedom
# Null hypothesis probability = 7.938948e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.398e-08 1.462e-08
25- 50 1.076e-07 3.742e-08
50-150 1.892e-07 9.981e-08
15-150 3.508e-07 1.331e-07
Peak spectrum fit
Power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50473 ( -0.238937 0.24156 )
Norm@50keV : 7.51205E-03 ( -0.00113999 0.00112944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9591 for 57 degrees of freedom
# Null hypothesis probability = 5.629653e-01
Photon flux (15-150 keV) in 1 sec: 0.938996 ( -0.136051 0.136172 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.1209e-08 ( -1.17314e-08 1.19818e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.124387 ( -1.79842 1.21049 )
Epeak [keV] : 59.8470 ( -14.499 105.678 )
Norm@50keV : 4.36270E-02 ( -0.0436553 0.418477 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.76 using 59 PHA bins.
# Reduced chi-squared = 0.9064 for 56 degrees of freedom
# Null hypothesis probability = 6.729387e-01
Photon flux (15-150 keV) in 1 sec: 0.888572 ( -0.143468 0.143608 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.14252e-08 ( -1.34196e-08 1.46674e-08 ) ergs/cm2
Band function
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.54948 ( -4.98712 -4.31952 )
beta : -2.17268 ( -0.890787 0.565076 )
Epeak [keV] : 39.8931 ( -11.0848 24.5233 )
Norm@50keV : 2.35821 ( -2.35539 50.2379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.83 using 59 PHA bins.
# Reduced chi-squared = 0.8697 for 55 degrees of freedom
# Null hypothesis probability = 7.425167e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.44305e-08 ( -6.44235e-08 -1.26181e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.6557 (-1.87637 2.35812)
R^2/D10^2 : 0.199587 (-0.0919618 0.157098)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.43 using 59 PHA bins.
# Reduced chi-squared = 0.9373 for 57 degrees of freedom
# Null hypothesis probability = 6.098508e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.779e-09 1.792e-09
25- 50 2.267e-08 4.805e-09
50-150 2.259e-08 7.370e-09
15-150 5.204e-08 1.034e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.030 (-101.12 -197.655)
Norm : 3.86399 (-0.556527 0.641706)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.03 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 57 degrees of freedom
# Null hypothesis probability = 6.247640e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.630e-09 5.495e-09
25- 50 1.851e-08 1.032e-08
50-150 4.051e-08 2.227e-08
15-150 6.865e-08 3.784e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.8592 (-3.02978 3.08796)
R1^2/D10^2 : 0.312895 (-0.179475 0.559576)
kT2 [keV] : 197.499 ( )
R2^2/D10^2 : 8.57887E-05 (-5.96511e-05 0.0511966)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.03 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.93 using 59 PHA bins.
# Reduced chi-squared = 0.8733 for 55 degrees of freedom
# Reduced chi-squared = 0.8714 for 55 degrees of freedom
# Null hypothesis probability = 7.358555e-01
# Null hypothesis probability = 7.393778e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.150e-09 3.689e-09
25- 50 2.182e-08 1.174e-08
50-150 3.720e-08 2.002e-08
15-150 6.717e-08 3.267e-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: 1.72492 ( -0.206099 0.211666 )
Norm@50keV : 1.94742E-03 ( -0.000253347 0.000248964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.00 using 59 PHA bins.
# Reduced chi-squared = 1.404 for 57 degrees of freedom
# Null hypothesis probability = 2.391763e-02
Photon flux (15-150 keV) in 18.57 sec: 0.260932 ( -0.030062 0.0300833 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34219e-07 ( -4.49184e-08 4.58781e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32349 ( -1.07856 0.582493 )
Epeak [keV] : 72.3778 ( -31.5584 -72.4079 )
Norm@50keV : 3.29070E-03 ( -0.00328919 0.010727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.31 using 59 PHA bins.
# Reduced chi-squared = 1.416 for 56 degrees of freedom
# Null hypothesis probability = 2.190688e-02
Photon flux (15-150 keV) in 18.57 sec: 0.256179 ( -0.031705 0.031534 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17913e-07 ( -5.71195e-08 5.597e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33165 ( -0.486304 0.538047 )
beta : -9.37140 ( 9.37166 19.3717 )
Epeak [keV] : 73.2137 ( -28.589 -73.1448 )
Norm@50keV : 3.25217E-03 ( -0.00133394 0.00204557 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.31 using 59 PHA bins.
# Reduced chi-squared = 1.442 for 55 degrees of freedom
# Null hypothesis probability = 1.761935e-02
Photon flux (15-150 keV) in 18.57 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) = 9.35e-08
S(50-100 keV) = 1.14e-07
T90 vs. Hardness ratio plot
T90 = 17.33599999547 sec.
Hardness ratio (energy fluence ratio) = 1.21925
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.60852
Count Ratio (50-100 keV) / (15-25 keV) = 0.660509
Mask shadow pattern
IMX = 1.248943120000310E-01, IMY = -1.425976206459038E-02
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:
-239.360000 -0.232000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9833 -15.6368 0.4 28.0 -94.4 7.5372 25.9 0.3 Sco X-1
254.4358 35.3035 22.0 52.7 -17.5 0.3079 0.5 2.6 Her X-1
256.1115 -37.8956 4.8 28.6 -147.1 -0.5271 -2.4 6.7 4U 1700-377
256.5404 -36.2887 12.8 27.2 -145.5 0.1924 0.9 9.5 GX 349+2
262.9174 -24.8018 6.8 15.0 -135.0 0.3513 1.7 6.0 GX 1+4
264.9243 -44.4105 7.2 31.3 -164.9 0.3462 1.6 8.1 4U 1735-44
268.3166 -1.5318 2.1 13.7 -22.0 1.0266 5.4 5.7 SW J1753.5-0127
270.2550 -25.0967 1.3 11.6 -160.4 1.8105 9.4 1.9 GX 5-1
270.3666 -25.6486 3.1 12.1 -161.7 0.8143 4.2 6.6 GRS 1758-258
273.9749 -14.0140 2.6 0.0 8.6 0.9214 4.5 2.2 GX 17+2
275.8868 -30.3339 3.1 16.4 176.7 0.7760 3.8 2.8 H1820-303
285.0167 -24.8946 19.3 15.0 140.4 0.1199 0.6 1.9 HT1900.1-2455
288.7656 10.9332 1.2 29.0 33.7 2.4971 9.5 2.1 GRS 1915+105
262.8194 -33.7094 7.0 22.1 -152.1 0.3305 1.6 11.3 GX 354-0
229.3393 -44.5694 3.3 48.5 -135.5 2.4413 3.4 ------ UNKNOWN
236.5719 20.7690 3.3 50.6 -44.7 3.5893 3.6 ------ UNKNOWN
233.1975 -4.4829 2.2 41.3 -78.0 4.4714 5.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.232000 18.340600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9865 -15.7136 4.5 28.0 -94.5 0.1724 2.5 4.4 Sco X-1
254.3885 35.3995 8.5 52.8 -17.5 0.1901 1.4 4.8 Her X-1
255.8706 -37.9764 5.4 28.8 -146.9 -0.1136 -2.1 9.6 4U 1700-377
256.3442 -36.4771 4.6 27.4 -145.5 0.1285 2.5 5.5 GX 349+2
262.8663 -24.5932 6.1 14.8 -134.3 0.0862 1.9 12.0 GX 1+4
264.9192 -44.5832 12.5 31.5 -165.0 0.0503 0.9 11.0 4U 1735-44
268.3948 -1.4216 6.5 13.8 -21.5 0.0793 1.8 2.5 SW J1753.5-0127
270.4344 -25.1546 11.3 11.6 -161.3 0.0500 1.1 9.3 GX 5-1
270.4606 -25.5910 0.0 12.0 -162.0 -0.0767 -1.7 12.5 GRS 1758-258
274.0194 -14.0133 16.4 0.1 50.3 -0.0321 -0.7 1.6 GX 17+2
275.8818 -30.5195 9.1 16.6 176.8 0.0574 1.3 9.4 H1820-303
285.1093 -24.9027 5.9 15.1 140.2 -0.0927 -2.0 4.1 HT1900.1-2455
288.9563 10.7999 0.0 29.0 34.2 -0.0453 -0.8 12.8 GRS 1915+105
263.1590 -33.9919 0.0 22.2 -153.1 -0.0948 -2.0 12.7 GX 354-0
274.4646 -6.9086 0.8 7.2 6.5 0.6673 15.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
66.740590 962.673900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9821 -15.6398 0.3 30.2 -137.4 27.6838 34.0 0.2 Sco X-1
254.3755 35.4838 29.1 46.5 -50.8 1.2860 0.4 9.4 Her X-1
255.7821 -37.8580 191.0 35.3 178.0 0.0475 0.1 9.7 4U 1700-377
256.4907 -36.4600 4.0 33.8 178.5 2.1962 2.9 3.5 GX 349+2
263.2260 -24.6900 0.0 20.8 -177.9 1.1617 2.0 12.3 GX 1+4
264.7100 -44.3007 6.4 38.4 163.3 1.9233 1.8 9.1 4U 1735-44
268.3560 -1.4337 1.8 8.2 -76.6 4.0883 6.4 1.3 SW J1753.5-0127
270.2759 -25.1106 1.0 18.6 164.1 7.0096 11.3 1.9 GX 5-1
270.1596 -25.7617 6.9 19.3 164.0 1.0526 1.7 7.8 GRS 1758-258
274.0481 -13.9668 2.0 7.1 155.8 3.5108 5.9 4.8 GX 17+2
275.9349 -30.3983 2.0 23.5 148.9 3.9615 5.7 1.9 H1820-303
285.0735 -25.0430 4.9 20.7 124.1 1.6315 2.4 7.6 HT1900.1-2455
288.8005 10.9150 0.7 22.8 10.6 10.6563 16.8 1.8 GRS 1915+105
299.6038 35.2093 0.5 48.3 -0.4 30.9714 21.3 0.8 Cyg X-1
308.1861 40.8927 5.7 56.9 2.0 6.9500 2.0 5.0 Cyg X-3
263.0567 -33.8652 3.0 29.0 171.9 2.7452 3.8 3.8 GX 354-0
256.7876 -59.5807 3.6 54.4 162.9 12.7591 3.3 ------ UNKNOWN
283.9119 10.2563 2.3 19.5 0.6 2.6705 5.0 ------ UNKNOWN
272.9157 -3.5246 2.9 3.8 -53.6 2.4449 3.9 ------ UNKNOWN
249.7170 1.6954 5.5 26.2 -99.8 1.8932 2.1 ------ UNKNOWN
221.9855 -38.0670 2.6 56.7 -159.6 13.6448 4.5 ------ UNKNOWN
UNKNOWN
Plot creation:
Sun May 31 06:58:23 EDT 2015