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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
306.0193 +33.8633 0.0021 0.0 125.1 571.3545 90.5 TRIG_00646721
------------------------------------------
Foreground time interval of the image:
-1.424 7.581 (delta_t = 9.005 [sec])
163.544 362.592 (delta_t = 199.048 [sec])
368.544 602.589 (delta_t = 234.045 [sec])
644.544 722.744 (delta_t = 78.200 [sec])
Background time interval of the image:
-2.456 -1.424 (delta_t = 1.032 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-1.424000 7.580900
163.544000 362.591800
368.544000 602.588800
644.544000 722.744000
780.544000 868.380000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.10386 ( )
Norm@50keV : 4.88067E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 447.40 using 59 PHA bins.
# Reduced chi-squared = 7.8492 for 57 degrees of freedom
# Null hypothesis probability = 5.774730e-62
Photon flux (15-150 keV) in 608.1 sec: 14.4904 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000374731 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-1.424000 7.580900
163.544000 362.591800
368.544000 602.588800
644.544000 722.744000
780.544000 868.380000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97608 ( )
Epeak [keV] : 1.26813 ( -0.365208 1.41497 )
Norm@50keV : 0.145548 ( -0.00463654 0.00403595 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.81 using 59 PHA bins.
# Reduced chi-squared = 0.8716 for 56 degrees of freedom
# Null hypothesis probability = 7.412420e-01
Photon flux (15-150 keV) in 608.1 sec: 11.9313 ( -0.3347 0.3391 ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000334482 ( -6.72923e-06 6.79004e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-1.424000 7.580900
163.544000 362.591800
368.544000 602.588800
644.544000 722.744000
780.544000 868.380000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55600 ( )
beta : -9.27202 ( )
Epeak [keV] : 19.8344 ( )
Norm@50keV : 0.166301 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 305.81 using 59 PHA bins.
# Reduced chi-squared = 5.5602 for 55 degrees of freedom
# Null hypothesis probability = 1.752323e-36
Photon flux (15-150 keV) in 608.1 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] : 12.5639 ( )
R^2/D10^2 : 1.28137 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 2499.47 using 59 PHA bins.
# Reduced chi-squared = 43.8503 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.608e-05 7.480e-07
25- 50 8.652e-05 1.824e-06
50-150 8.458e-05 1.034e-06
15-150 1.972e-04 2.858e-06
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.9154 ( )
Norm : 71.5412 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 200.62 using 59 PHA bins.
# Reduced chi-squared = 3.5197 for 57 degrees of freedom
# Null hypothesis probability = 7.091571e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.604e-05 2.159e-06
25- 50 1.203e-04 2.037e-06
50-150 8.240e-05 9.426e-07
15-150 2.988e-04 4.257e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.87527 (-0.18936 0.190604)
R1^2/D10^2 : 17.9911 (-2.1023 2.44866)
kT2 [keV] : 18.3762 (-0.468886 0.506)
R2^2/D10^2 : 0.129790 (-0.0186468 0.0208333)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.94 using 59 PHA bins.
# Reduced chi-squared = 1.363 for 55 degrees of freedom
# Null hypothesis probability = 3.816446e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.681e-05 3.801e-06
25- 50 1.327e-04 2.463e-06
50-150 7.805e-05 1.064e-06
15-150 2.975e-04 5.260e-06
Peak spectrum fit
Power-law model
Time interval is from 533.248 sec. to 534.248 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.12532 ( -0.0586508 0.0594136 )
Norm@50keV : 7.89489E-02 ( -0.0026174 0.00260397 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.59 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.029394e-02
Photon flux (15-150 keV) in 1 sec: 23.8186 ( -0.835707 0.845208 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00752e-06 ( -2.77306e-08 2.78083e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 533.248 sec. to 534.248 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97752 ( )
Epeak [keV] : 0.827478 ( -0.215647 3.30585 )
Norm@50keV : 0.335581 ( -0.0243479 0.0228195 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.74 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.473346e-01
Photon flux (15-150 keV) in 1 sec: 22.1103 ( -0.9954 1.0085 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.46068e-07 ( -3.4198e-08 3.4419e-08 ) ergs/cm2
Band function
Time interval is from 533.248 sec. to 534.248 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.98848 ( -0.0250852 0.0257335 )
beta : -3.52185 ( -0.30808 0.188443 )
Epeak [keV] : 0.391223 ( -0.0342914 0.0366775 )
Norm@50keV : 0.359633 ( -0.00931906 0.00931907 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.40 using 59 PHA bins.
# Reduced chi-squared = 0.9345 for 55 degrees of freedom
# Null hypothesis probability = 6.130852e-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] : 7.73899 ( )
R^2/D10^2 : 21.8697 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 310.75 using 59 PHA bins.
# Reduced chi-squared = 5.4518 for 57 degrees of freedom
# Null hypothesis probability = 1.284843e-36
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.308e-07 1.220e-08
25- 50 3.811e-07 1.030e-08
50-150 8.961e-08 6.310e-09
15-150 7.015e-07 2.025e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.4157 (-1.15604 1.22919)
Norm : 198.247 (-14.371 15.619)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.82 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 57 degrees of freedom
# Null hypothesis probability = 2.469873e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.575e-07 1.535e-08
25- 50 3.608e-07 9.700e-09
50-150 1.482e-07 9.900e-09
15-150 8.664e-07 2.125e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.83666 (-0.407551 0.414856)
R1^2/D10^2 : 158.722 (-49.3652 81.851)
kT2 [keV] : 13.2028 (-1.18704 1.46051)
R2^2/D10^2 : 1.11948 (-0.473369 0.733322)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.70 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Null hypothesis probability = 2.779437e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.787e-07 3.240e-08
25- 50 3.477e-07 2.315e-08
50-150 1.681e-07 1.745e-08
15-150 8.945e-07 5.915e-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: 3.13176 ( )
Norm@50keV : 5.36548E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 458.30 using 59 PHA bins.
# Reduced chi-squared = 8.0404 for 57 degrees of freedom
# Null hypothesis probability = 4.794034e-64
Photon flux (15-150 keV) in 520.3 sec: 16.2664 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000357423 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97380 ( )
Epeak [keV] : 1.36222 ( -0.473635 1.09288 )
Norm@50keV : 0.163609 ( -0.00534063 0.00462398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.51 using 59 PHA bins.
# Reduced chi-squared = 0.9913 for 56 degrees of freedom
# Null hypothesis probability = 4.932036e-01
Photon flux (15-150 keV) in 520.3 sec: 13.3679 ( -0.375 0.3799 ) ph/cm2/s
Energy fluence (15-150 keV) : 0.000318523 ( -6.44027e-06 6.49386e-06 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.54491 ( )
beta : -9.18504 ( )
Epeak [keV] : 20.2623 ( )
Norm@50keV : 0.181412 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 377.80 using 59 PHA bins.
# Reduced chi-squared = 6.8692 for 55 degrees of freedom
# Null hypothesis probability = 1.064630e-49
Photon flux (15-150 keV) in 520.3 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) = 1.24e-04
S(50-100 keV) = 5.76e-05
T90 vs. Hardness ratio plot
T90 = 503.575999975204 sec.
Hardness ratio (energy fluence ratio) = 0.464516
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.799629
Count Ratio (50-100 keV) / (15-25 keV) = 0.218818
Mask shadow pattern
IMX = -9.998916046811751E-05, IMY = -1.425195088651695E-04
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-2.456000 -1.424000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4902 35.4547 8.6 41.9 165.5 -0.0257 -1.3 6.9 Her X-1
288.7018 10.9256 4.0 27.9 96.9 -0.0452 -2.9 5.8 GRS 1915+105
299.4652 35.3288 6.3 5.6 165.2 0.0173 1.8 9.8 Cyg X-1
308.2436 41.0660 16.0 7.4 -108.8 0.0067 0.7 9.1 Cyg X-3
326.1831 38.3030 16.3 16.8 -52.9 -0.0073 -0.7 1.2 Cyg X-2
291.5905 -3.8041 2.9 40.1 80.9 0.1589 4.0 ------ UNKNOWN
306.0040 33.8526 0.3 0.0 113.9 0.3794 37.5 ------ UNKNOWN
346.2343 5.7199 2.3 46.6 -3.9 0.0853 5.0 ------ UNKNOWN
0.4379 41.0501 2.4 43.1 -57.9 0.1530 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.424000 7.580900
163.544000 362.591800
368.544000 602.588800
644.544000 722.744000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4680 35.4565 18.8 42.0 165.6 -7.1866 -0.6 6.9 Her X-1
288.8223 10.9210 4.2 27.8 96.7 26.5293 2.7 2.0 GRS 1915+105
299.3820 35.1234 5.7 5.6 163.0 12.8958 2.0 11.2 Cyg X-1
307.9243 41.0100 9.1 7.3 -110.5 -7.5171 -1.3 9.1 Cyg X-3
326.0259 38.2272 11.3 16.7 -52.7 6.2408 1.0 8.9 Cyg X-2
306.0193 33.8633 0.1 0.0 125.0 571.3591 90.5 ------ UNKNOWN
290.5652 47.1736 2.2 17.7 -158.4 32.0783 5.2 ------ UNKNOWN
358.9209 7.7765 2.7 55.1 -16.2 85.1515 4.2 471.0 UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
915.444600 928.644590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0081 -15.6711 0.6 32.1 31.1 1.0040 19.0 2.5 Sco X-1
256.0698 -37.9483 5.7 12.8 -12.6 0.0823 2.0 7.4 4U 1700-377
256.6562 -36.3128 0.0 12.4 -4.9 0.0507 1.3 12.5 GX 349+2
263.1944 -24.6168 0.0 14.5 52.6 -0.0870 -2.1 12.7 GX 1+4
264.7340 -44.4442 125.3 9.4 -58.8 -0.0036 -0.1 0.5 4U 1735-44
268.4948 -1.4246 12.0 35.7 80.6 0.1001 1.0 7.8 SW J1753.5-0127
270.2765 -25.1238 3.9 11.9 78.8 0.1157 3.0 2.7 GX 5-1
270.2331 -25.8890 3.2 11.2 78.1 0.1354 3.5 9.5 GRS 1758-258
273.9219 -14.1256 3.2 22.9 91.4 0.1958 3.6 7.2 GX 17+2
275.7630 -30.5138 6.1 7.1 113.2 0.0695 1.9 12.2 H1820-303
285.1763 -25.0625 15.0 16.3 133.7 0.0318 0.8 11.4 HT1900.1-2455
263.1414 -33.8589 7.8 7.9 17.0 -0.0562 -1.5 7.7 GX 354-0
223.0170 -13.0522 2.0 49.8 12.2 0.6372 5.8 ------ UNKNOWN
293.1465 -73.6446 2.6 38.1 -102.6 0.4720 4.5 ------ UNKNOWN
Plot creation:
Sat Jul 11 02:57:57 EDT 2015