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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.2199 15.8356 0.0111 38.2124 166.0697 2.7812294 17.184 TRIG_00419404
Foreground time interval of the image:
-3.408 64.021 (delta_t = 67.429 [sec])
Background time interval of the image:
-239.080 -3.408 (delta_t = 235.672 [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 16.384000
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 16.384000
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 16.384000
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 -3.408 sec. to 223.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09722 ( -0.0697919 0.0690107 )
Norm@50keV : 2.60687E-03 ( -9.59708e-05 9.56086e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.97 using 59 PHA bins.
# Reduced chi-squared = 0.9644 for 57 degrees of freedom
# Null hypothesis probability = 5.516766e-01
Photon flux (15-150 keV) in 226.5 sec: 0.302297 ( -0.0118406 0.0118831 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.17883e-06 ( -2.27023e-07 2.27614e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.408 sec. to 223.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09399 ( -0.0724982 0.0674622 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.62162E-03 ( -4.89278e-05 0.000420925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.03 using 59 PHA bins.
# Reduced chi-squared = 0.9827 for 56 degrees of freedom
# Null hypothesis probability = 5.115448e-01
Photon flux (15-150 keV) in 226.5 sec: 0.302451 ( -0.012142 0.011606 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.17706e-06 ( -2.23918e-07 2.26591e-07 ) ergs/cm2
Band function
Time interval is from -3.408 sec. to 223.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.880262 ( 0.880259 0.880259 )
beta : -1.09720 ( -0.0689726 0.0698689 )
Epeak [keV] : 52.5211 ( -52.5236 -52.5236 )
Norm@50keV : 4.57434E-03 ( -0.00168372 119063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.97 using 59 PHA bins.
# Reduced chi-squared = 0.9994 for 55 degrees of freedom
# Null hypothesis probability = 4.758318e-01
Photon flux (15-150 keV) in 226.5 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] : 23.6093 ( )
R^2/D10^2 : 8.14956E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 210.89 using 59 PHA bins.
# Reduced chi-squared = 3.6998 for 57 degrees of freedom
# Null hypothesis probability = 1.621762e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.841e-07 1.451e-08
25- 50 1.013e-06 5.844e-08
50-150 4.213e-06 2.299e-07
15-150 5.411e-06 2.220e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.30986 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 198.07 using 59 PHA bins.
# Reduced chi-squared = 3.4750 for 57 degrees of freedom
# Null hypothesis probability = 1.793719e-17
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.388e-07 2.899e-08
25- 50 1.421e-06 5.311e-08
50-150 3.117e-06 1.166e-07
15-150 5.277e-06 2.061e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.96953 (-0.988495 1.14718)
R1^2/D10^2 : 0.254623 (-0.106671 0.200956)
kT2 [keV] : 33.8924 (-3.31599 4.50433)
R2^2/D10^2 : 2.38614E-03 (-0.000758047 0.000917422)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.36 using 59 PHA bins.
# Reduced chi-squared = 0.9519 for 55 degrees of freedom
# Null hypothesis probability = 5.763138e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.378e-07 9.298e-08
25- 50 1.189e-06 1.249e-07
50-150 4.547e-06 3.296e-07
15-150 6.274e-06 4.677e-07
Peak spectrum fit
Power-law model
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.672348 ( -0.400736 0.353862 )
Norm@50keV : 5.53998E-03 ( -0.00120543 0.00113633 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9620 for 57 degrees of freedom
# Null hypothesis probability = 5.568173e-01
Photon flux (15-150 keV) in 1 sec: 0.641868 ( -0.124073 0.125303 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.8479e-08 ( -1.29507e-08 1.30161e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.664205 ( -1.04918 0.442813 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 5.58288E-03 ( -0.00120732 -0.00558337 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.85 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 56 degrees of freedom
# Null hypothesis probability = 5.185142e-01
Photon flux (15-150 keV) in 1 sec: 0.644150 ( -0.126235 0.12292 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.81521e-08 ( -1.26559e-08 1.32494e-08 ) ergs/cm2
Band function
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -0.679760 ( -0.355964 0.402049 )
Epeak [keV] : 21.4073 ( -19.0344 -19.0344 )
Norm@50keV : 660.130 ( -126.463 843979 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9960 for 55 degrees of freedom
# Null hypothesis probability = 4.829236e-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] : 29.3155 (-7.81563 15.049)
R^2/D10^2 : 1.02633E-02 (-0.00685205 0.015361)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.59 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 57 degrees of freedom
# Null hypothesis probability = 3.475382e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.399e-09 5.761e-10
25- 50 8.550e-09 3.589e-09
50-150 5.236e-08 1.898e-08
15-150 6.231e-08 2.228e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.60047 (-0.523849 0.523783)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.03 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 57 degrees of freedom
# Null hypothesis probability = 8.664641e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.480e-09 3.759e-09
25- 50 1.247e-08 7.240e-09
50-150 2.734e-08 1.581e-08
15-150 4.629e-08 2.679e-08
Double BB
R1^2/D10^2 : 6.28142E-02 ( )
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 1.59452E-04 (-7.51819e-05 5.21785e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9781 for 55 degrees of freedom
# Reduced chi-squared = 0.9690 for 55 degrees of freedom
# Reduced chi-squared = 0.9678 for 55 degrees of freedom
# Null hypothesis probability = 5.208160e-01
# Null hypothesis probability = 5.400328e-01
# Null hypothesis probability = 5.424893e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.860e-09 1.640e-09
25- 50 1.110e-08 6.565e-09
50-150 5.506e-08 4.037e-08
15-150 6.902e-08 4.123e-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: 0.910928 ( -0.149789 0.14417 )
Norm@50keV : 2.70738E-03 ( -0.000231253 0.000227245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.72 using 59 PHA bins.
# Reduced chi-squared = 0.8022 for 57 degrees of freedom
# Null hypothesis probability = 8.580298e-01
Photon flux (15-150 keV) in 67.43 sec: 0.310773 ( -0.0264413 0.0267398 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04016e-06 ( -1.53555e-07 1.53752e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.822594 ( -0.607243 0.218075 )
Epeak [keV] : 875.949 ( -875.907 -875.907 )
Norm@50keV : 2.92438E-03 ( -0.000365584 0.00191633 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.65 using 59 PHA bins.
# Reduced chi-squared = 0.8152 for 56 degrees of freedom
# Null hypothesis probability = 8.368670e-01
Photon flux (15-150 keV) in 67.43 sec: 0.309507 ( -0.029352 0.027802 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03653e-06 ( -1.57186e-07 1.5639e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.98906 ( 0.822496 1.98906 )
beta : -0.910625 ( -0.14427 0.149799 )
Epeak [keV] : 9998.95 ( -9996.1 -9996.1 )
Norm@50keV : 2.70706E-03 ( 0.822496 -0.00270716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.72 using 59 PHA bins.
# Reduced chi-squared = 0.8313 for 55 degrees of freedom
# Null hypothesis probability = 8.092576e-01
Photon flux (15-150 keV) in 67.43 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) = 1.22e-06
S(50-100 keV) = 2.28e-06
T90 vs. Hardness ratio plot
T90 = 192.63999992609 sec.
Hardness ratio (energy fluence ratio) = 1.86885
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.45161
Count Ratio (50-100 keV) / (15-25 keV) = 1.59507
Mask shadow pattern
IMX = -7.641177845530357E-01, IMY = -1.895293253531387E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000
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:
-239.080000 -3.408000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9843 -15.6378 0.3 22.8 92.0 12.8548 43.4 0.3 Sco X-1
256.0664 -37.7453 3.0 18.5 20.1 0.8745 3.9 7.0 4U 1700-377
256.3747 -36.4705 3.8 17.4 22.0 0.6832 3.1 4.1 GX 349+2
263.1683 -24.7845 11.8 5.1 49.3 0.1982 1.0 9.0 GX 1+4
264.6151 -44.3079 8.5 22.2 -4.5 -0.3151 -1.4 10.1 4U 1735-44
268.3279 -1.4303 10.9 20.9 169.7 0.2423 1.1 2.8 SW J1753.5-0127
270.2620 -25.0644 1.9 3.4 -47.0 1.4424 6.1 1.5 GX 5-1
270.3016 -25.6859 5.5 3.9 -42.0 0.5316 2.3 3.4 GRS 1758-258
273.9199 -14.0709 2.9 10.0 -156.1 0.9580 3.9 5.4 GX 17+2
275.7293 -30.4955 0.0 10.7 -49.5 0.4229 1.8 12.7 H1820-303
284.9803 -24.8146 18.7 15.7 -88.6 0.1424 0.6 7.0 HT1900.1-2455
288.8278 10.9117 2.0 39.0 -157.5 2.2155 5.7 2.7 GRS 1915+105
262.9330 -33.7513 29.3 12.3 9.4 -0.0936 -0.4 5.7 GX 354-0
231.5467 -63.2112 2.3 47.6 10.2 2.3781 5.0 ------ UNKNOWN
255.6974 -48.7611 1.0 28.2 6.3 2.9702 11.2 ------ UNKNOWN
312.0093 -32.4634 3.0 40.0 -76.7 3.6974 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.408000 64.020610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0681 -15.5815 14.6 22.7 92.2 -0.1129 -0.8 6.2 Sco X-1
255.8344 -37.7454 3.5 18.7 20.5 0.3328 3.3 9.3 4U 1700-377
256.4863 -36.5436 11.6 17.4 21.6 -0.1016 -1.0 7.6 GX 349+2
262.8632 -24.7528 4.1 5.3 51.0 0.2716 2.8 8.0 GX 1+4
264.7779 -44.4243 9.0 22.3 -4.9 0.1312 1.3 2.1 4U 1735-44
268.2665 -1.5863 38.2 20.7 169.5 -0.0297 -0.3 10.1 SW J1753.5-0127
270.3805 -25.2428 5.9 3.6 -46.7 0.2813 2.9 11.1 GX 5-1
270.2058 -25.5802 5.5 3.8 -41.7 0.3398 3.5 11.1 GRS 1758-258
274.0102 -13.8854 5.3 10.2 -156.3 0.2040 2.2 9.1 GX 17+2
275.9259 -30.3391 45.7 10.7 -50.7 0.0254 0.3 1.7 H1820-303
284.8831 -24.7655 0.0 15.6 -88.8 -0.1843 -1.7 12.5 HT1900.1-2455
288.8372 11.0492 13.6 39.1 -157.6 -0.1159 -0.9 6.6 GRS 1915+105
263.1055 -34.0124 8.6 12.5 8.3 -0.1262 -1.3 12.1 GX 354-0
234.0814 -46.5065 2.4 36.5 29.2 0.7977 4.8 ------ UNKNOWN
266.2199 15.8356 0.7 38.2 166.1 2.7808 17.2 ------ UNKNOWN
278.9668 23.5301 2.5 47.1 -177.4 0.9642 4.6 ------ UNKNOWN
295.3630 -9.5797 2.1 29.1 -122.7 0.6990 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
128.820600 963.007800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9916 -15.6474 0.4 37.8 51.8 30.6731 28.7 0.8 Sco X-1
254.6561 35.3116 5.6 22.1 171.3 1.1151 2.1 9.9 Her X-1
263.0144 -24.7138 4.9 40.7 21.6 2.0007 2.4 1.9 GX 1+4
268.2858 -1.5061 3.8 17.4 10.3 1.5486 3.0 5.9 SW J1753.5-0127
270.2843 -25.0790 2.6 41.1 11.5 3.7834 4.5 0.0 GX 5-1
270.3032 -25.7406 76.0 41.8 11.6 0.1324 0.2 0.2 GRS 1758-258
274.0243 -14.0540 1.6 30.9 2.3 4.1933 7.3 1.5 GX 17+2
275.9245 -30.4335 14.5 47.2 5.7 -0.8092 -0.8 4.0 H1820-303
285.1920 -25.0263 0.0 44.8 -7.5 -1.2510 -1.4 10.6 HT1900.1-2455
288.8019 10.9463 0.5 22.5 -63.1 12.7760 22.4 0.2 GRS 1915+105
299.5856 35.2104 0.4 35.5 -112.2 31.0656 31.5 0.6 Cyg X-1
308.1567 40.8736 2.4 44.0 -116.2 10.5864 4.8 5.2 Cyg X-3
262.9071 -33.8328 10.3 49.8 20.8 1.7397 1.1 4.1 GX 354-0
220.4891 48.2250 3.0 49.4 158.2 7.1779 3.8 ------ UNKNOWN
240.5718 21.1704 2.5 24.9 123.5 2.8901 4.6 ------ UNKNOWN
245.9394 13.7884 2.7 19.7 103.9 2.4877 4.3 ------ UNKNOWN
266.2195 15.8682 1.8 0.0 -172.8 3.8639 6.3 ------ UNKNOWN
237.7679 70.2878 3.8 57.2 -173.9 10.0554 3.1 ------ UNKNOWN
287.2001 -13.9407 3.5 36.3 -18.8 1.9586 3.3 ------ UNKNOWN
310.0166 -10.4425 3.8 50.7 -44.5 8.9572 3.0 ------ UNKNOWN
307.9718 44.7094 2.3 45.4 -121.2 9.8880 4.9 ------ UNKNOWN
Plot creation:
Sun May 31 01:53:50 EDT 2015