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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.2339 -36.7082 0.0074 30.6032 -15.2296 9.2675058 25.868 TRIG_00202442
Foreground time interval of the image:
-51.624 268.212 (delta_t = 319.836 [sec])
Background time interval of the image:
-239.208 -51.624 (delta_t = 187.584 [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 -51.624 sec. to 268.212 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55692 ( -0.0733574 0.0733503 )
Norm@50keV : 1.80277E-03 ( -7.3577e-05 7.3526e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.398372e-01
Photon flux (15-150 keV) in 319.8 sec: 0.228680 ( -0.00992136 0.00994939 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.42221e-06 ( -2.34894e-07 2.35549e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -51.624 sec. to 268.212 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06609 ( -0.321473 0.298623 )
Epeak [keV] : 96.8088 ( -20.0782 68.6054 )
Norm@50keV : 3.14330E-03 ( -0.000882192 0.0013426 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9390 for 56 degrees of freedom
# Null hypothesis probability = 6.049091e-01
Photon flux (15-150 keV) in 319.8 sec: 0.221929 ( -0.01066 0.010681 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.21725e-06 ( -2.67385e-07 2.66617e-07 ) ergs/cm2
Band function
Time interval is from -51.624 sec. to 268.212 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.39415 ( -2.30246 -1.39269 )
beta : -1.70587 ( -0.232801 0.115989 )
Epeak [keV] : 35.4148 ( -7.27822 39.3328 )
Norm@50keV : 0.160450 ( -0.159665 37.2287 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.78 using 59 PHA bins.
# Reduced chi-squared = 0.8688 for 55 degrees of freedom
# Null hypothesis probability = 7.442280e-01
Photon flux (15-150 keV) in 319.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23318e-06 ( -5.23094e-06 -2.52482e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9394 ( )
R^2/D10^2 : 2.53890E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.19 using 59 PHA bins.
# Reduced chi-squared = 2.7576 for 57 degrees of freedom
# Null hypothesis probability = 2.598489e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.796e-07 3.150e-08
25- 50 1.503e-06 8.203e-08
50-150 2.279e-06 1.903e-07
15-150 4.161e-06 1.935e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.772 (-39.4907 -198.801)
Norm : 0.928785 (-0.0374784 0.0425404)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.46 using 59 PHA bins.
# Reduced chi-squared = 0.9379 for 57 degrees of freedom
# Null hypothesis probability = 6.085721e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.399e-07 3.950e-08
25- 50 1.423e-06 7.739e-08
50-150 3.117e-06 5.883e-07
15-150 5.280e-06 6.204e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.19313 (-1.06101 1.13274)
R1^2/D10^2 : 0.143136 (-0.0470081 0.0792304)
kT2 [keV] : 28.6289 (-4.54043 7.44562)
R2^2/D10^2 : 1.86993E-03 (-0.00103163 0.00170076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.20 using 59 PHA bins.
# Reduced chi-squared = 0.8582 for 55 degrees of freedom
# Null hypothesis probability = 7.635675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.441e-07 8.890e-08
25- 50 1.508e-06 1.693e-07
50-150 3.101e-06 7.176e-07
15-150 5.253e-06 8.331e-07
Peak spectrum fit
Power-law model
Time interval is from 182.188 sec. to 183.188 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54686 ( -0.153124 0.154795 )
Norm@50keV : 1.61497E-02 ( -0.00150805 0.00150154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.13 using 59 PHA bins.
# Reduced chi-squared = 0.7216 for 57 degrees of freedom
# Null hypothesis probability = 9.438451e-01
Photon flux (15-150 keV) in 1 sec: 2.04261 ( -0.190151 0.190518 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52104e-07 ( -1.52475e-08 1.53705e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 182.188 sec. to 183.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.741880 ( -0.76407 0.644942 )
Epeak [keV] : 77.0856 ( -17.8403 103.084 )
Norm@50keV : 4.15212E-02 ( -0.0216684 0.0585651 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.43 using 59 PHA bins.
# Reduced chi-squared = 0.6505 for 56 degrees of freedom
# Null hypothesis probability = 9.802027e-01
Photon flux (15-150 keV) in 1 sec: 1.97247 ( -0.19856 0.19853 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43562e-07 ( -1.686e-08 1.6946e-08 ) ergs/cm2
Band function
Time interval is from 182.188 sec. to 183.188 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.195108 ( -1.74176 -0.381769 )
beta : -1.88378 ( 1.87905 0.323391 )
Epeak [keV] : 48.8343 ( -21.4022 71.3637 )
Norm@50keV : 0.168032 ( -0.1646 418.565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.18 using 59 PHA bins.
# Reduced chi-squared = 0.6579 for 55 degrees of freedom
# Null hypothesis probability = 9.765487e-01
Photon flux (15-150 keV) in 1 sec: 1.96962 ( 5.03038 -0.19821 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43586e-07 ( -1.43579e-07 -1.6781e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.3689 (-1.52228 1.7364)
R^2/D10^2 : 0.270699 (-0.0907433 0.133507)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.27 using 59 PHA bins.
# Reduced chi-squared = 0.9345 for 57 degrees of freedom
# Null hypothesis probability = 6.158148e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.177e-08 2.176e-09
25- 50 4.492e-08 5.415e-09
50-150 6.186e-08 1.097e-08
15-150 1.186e-07 1.430e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 197.003 (-73.5807 -196.151)
Norm : 8.37765 (-0.770166 0.871026)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.10 using 59 PHA bins.
# Reduced chi-squared = 0.6685 for 57 degrees of freedom
# Null hypothesis probability = 9.744482e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.089e-08 5.200e-09
25- 50 4.014e-08 2.137e-08
50-150 8.768e-08 4.630e-08
15-150 1.487e-07 7.600e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.72034 (-2.55891 3.05936)
R1^2/D10^2 : 1.41843 (-0.854099 2.86057)
kT2 [keV] : 23.8144 (-6.08036 20.4305)
R2^2/D10^2 : 3.27405E-02 (-0.0291735 0.0756755)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.04 using 59 PHA bins.
# Reduced chi-squared = 0.6553 for 55 degrees of freedom
# Null hypothesis probability = 9.775170e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.818e-08 9.099e-09
25- 50 4.274e-08 2.066e-08
50-150 8.304e-08 4.489e-08
15-150 1.440e-07 6.240e-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: 1.55692 ( -0.0733574 0.0733503 )
Norm@50keV : 1.80277E-03 ( -7.3577e-05 7.3526e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.398372e-01
Photon flux (15-150 keV) in 319.8 sec: 0.228680 ( -0.00992136 0.00994939 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.42221e-06 ( -2.34894e-07 2.35549e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06609 ( -0.321473 0.298623 )
Epeak [keV] : 96.8088 ( -20.0782 68.6054 )
Norm@50keV : 3.14330E-03 ( -0.000882192 0.0013426 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9390 for 56 degrees of freedom
# Null hypothesis probability = 6.049091e-01
Photon flux (15-150 keV) in 319.8 sec: 0.221929 ( -0.01066 0.010681 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.21725e-06 ( -2.67385e-07 2.66617e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.39415 ( -2.30246 -1.39269 )
beta : -1.70587 ( -0.232801 0.115989 )
Epeak [keV] : 35.4148 ( -7.27822 39.4497 )
Norm@50keV : 0.160450 ( -0.159665 37.2295 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.78 using 59 PHA bins.
# Reduced chi-squared = 0.8688 for 55 degrees of freedom
# Null hypothesis probability = 7.442280e-01
Photon flux (15-150 keV) in 319.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23318e-06 ( -5.23094e-06 -2.52482e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.38e-06
S(50-100 keV) = 1.87e-06
T90 vs. Hardness ratio plot
T90 = 229.472000002861 sec.
Hardness ratio (energy fluence ratio) = 1.35507
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.4409
Count Ratio (50-100 keV) / (15-25 keV) = 1.00901
Mask shadow pattern
IMX = 5.707016042742225E-01, IMY = 1.553729841290223E-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:
-239.208000 -51.624000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9803 -15.6361 0.3 23.8 61.5 11.0118 45.1 0.3 Sco X-1
254.2956 35.2194 48.1 43.8 159.7 0.1035 0.2 10.8 Her X-1
255.9836 -37.7872 2.6 32.8 12.4 1.0454 4.4 3.4 4U 1700-377
256.4148 -36.4095 3.2 31.4 12.7 0.8298 3.6 1.3 GX 349+2
263.0093 -24.7646 2.3 18.5 8.4 0.9380 5.1 1.1 GX 1+4
264.6005 -44.2906 8.7 37.7 -1.2 0.3945 1.3 11.3 4U 1735-44
268.5288 -1.3151 0.0 5.5 -174.1 0.4540 2.3 12.7 SW J1753.5-0127
270.2228 -25.1078 6.2 18.6 -12.3 0.3639 1.9 3.8 GX 5-1
270.1870 -25.8617 3.9 19.3 -11.9 0.6001 3.0 9.5 GRS 1758-258
273.8564 -14.0085 3.3 9.6 -44.6 0.7218 3.5 8.9 GX 17+2
275.7860 -30.3210 4.2 24.8 -21.8 0.5171 2.7 7.7 H1820-303
285.0061 -25.0195 5.3 24.8 -45.1 0.5066 2.2 6.2 HT1900.1-2455
288.8084 10.9528 1.0 27.6 -134.3 3.1217 11.0 0.7 GRS 1915+105
299.5984 35.1943 1.1 51.7 -151.0 6.1863 10.5 0.6 Cyg X-1
262.8770 -33.7913 3.7 27.4 3.8 0.7180 3.1 6.2 GX 354-0
281.7340 -41.5850 3.2 37.1 -22.4 0.9258 3.6 ------ UNKNOWN
291.6437 48.2974 3.0 59.0 -166.1 4.3674 3.8 ------ UNKNOWN
296.9274 46.8339 3.9 59.6 -161.7 4.8846 3.0 ------ UNKNOWN
306.0269 27.2347 3.9 50.4 -138.7 2.9751 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-51.624000 268.212000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0052 -15.6827 1085.1 23.8 61.4 0.0040 0.0 3.0 Sco X-1
254.4540 35.3403 139.1 43.8 159.9 -0.0553 -0.1 0.2 Her X-1
256.0291 -37.9872 5.3 33.0 12.2 0.8335 2.2 8.8 4U 1700-377
256.5825 -36.5220 3.9 31.4 12.4 -1.1360 -3.0 9.2 GX 349+2
262.9943 -24.7927 2.5 18.6 8.4 -1.4343 -4.6 2.9 GX 1+4
264.7387 -44.4546 257.9 37.8 -1.4 0.0193 0.0 0.3 4U 1735-44
268.2150 -1.4920 4.8 5.3 -177.1 0.6947 2.4 9.5 SW J1753.5-0127
270.1873 -24.9243 4.0 18.4 -12.3 0.9130 2.9 10.7 GX 5-1
270.4731 -25.6017 0.0 19.1 -12.8 0.3738 1.1 12.5 GRS 1758-258
274.1600 -14.0325 5.7 9.8 -45.9 0.6442 2.0 9.0 GX 17+2
275.8576 -30.2989 11.9 24.8 -22.0 -0.3243 -1.0 5.4 H1820-303
285.1970 -24.8639 6.3 24.8 -45.7 0.6922 1.8 9.4 HT1900.1-2455
288.9433 10.9535 58.7 27.7 -134.1 -0.0752 -0.2 8.6 GRS 1915+105
299.6803 35.1586 4.0 51.7 -150.9 -3.1723 -2.9 5.1 Cyg X-1
262.8991 -33.6750 6.0 27.3 3.8 -0.6809 -1.9 10.6 GX 354-0
235.7282 -2.7882 2.6 31.9 90.9 2.6157 4.4 ------ UNKNOWN
264.6337 46.3248 1.8 53.1 172.9 7.8786 6.2 ------ UNKNOWN
274.2339 -36.7082 0.4 30.6 -15.2 9.2666 25.9 ------ UNKNOWN
293.8113 13.7373 2.4 33.2 -132.8 2.2063 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
863.992600 962.898200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6424 22.0134 0.4 35.5 33.6 4.1243 26.6 0.5 Crab
34.9461 31.4462 2.7 39.5 -42.4 0.7556 4.2 ------ UNKNOWN
23.5736 20.3153 2.7 39.7 -66.2 1.3573 4.2 ------ UNKNOWN
Plot creation:
Sun May 31 13:55:00 EDT 2015