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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.9293 -72.1517 0.0197 45.2416 -174.5511 0.6937619 9.780 TRIG_00616061
Foreground time interval of the image:
-0.384 9.172 (delta_t = 9.556 [sec])
Background time interval of the image:
-107.955 -0.384 (delta_t = 107.571 [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 8.192000
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 8.192000
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 8.192000
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 -0.384 sec. to 9.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30918 ( -0.271062 0.260411 )
Norm@50keV : 5.03804E-03 ( -0.000768186 0.000765856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.18 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 57 degrees of freedom
# Null hypothesis probability = 7.310356e-02
Photon flux (15-150 keV) in 9.556 sec: 0.602078 ( -0.0995611 0.100726 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.74687e-07 ( -7.40681e-08 7.43808e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.384 sec. to 9.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.820570 ( -1.50369 0.711414 )
Epeak [keV] : 130.033 ( -130.092 -130.092 )
Norm@50keV : 8.58116E-03 ( -0.00419469 0.0331015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.69 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 56 degrees of freedom
# Null hypothesis probability = 6.624294e-02
Photon flux (15-150 keV) in 9.556 sec: 0.588710 ( -0.104891 0.105485 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61542e-07 ( -8.45295e-08 8.09928e-08 ) ergs/cm2
Band function
Time interval is from -0.384 sec. to 9.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97284 ( -14.8595 -4.97284 )
beta : -1.48593 ( -0.382368 0.321328 )
Epeak [keV] : 31.2974 ( -12.4492 23.3191 )
Norm@50keV : 115.722 ( -17.2291 2452.42 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.27 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 55 degrees of freedom
# Null hypothesis probability = 8.054347e-02
Photon flux (15-150 keV) in 9.556 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.5647e-07 ( -4.56403e-07 -7.8385e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.5262 (-2.85228 3.72851)
R^2/D10^2 : 4.20236E-02 (-0.0207101 0.0367376)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.01 using 59 PHA bins.
# Reduced chi-squared = 1.369 for 57 degrees of freedom
# Null hypothesis probability = 3.373889e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.490e-08 7.879e-09
25- 50 1.129e-07 2.921e-08
50-150 2.498e-07 7.272e-08
15-150 3.876e-07 9.312e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.57586 (-0.391981 0.391872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.33 using 59 PHA bins.
# Reduced chi-squared = 1.322 for 57 degrees of freedom
# Null hypothesis probability = 5.242517e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.130e-08 3.514e-08
25- 50 1.179e-07 6.699e-08
50-150 2.586e-07 1.424e-07
15-150 4.378e-07 2.420e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.9571 (-2.45596 3.4203)
R1^2/D10^2 : 9.88670E-02 (-0.0537532 0.107745)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 6.91987E-05 (-3.68703e-05 9.89992e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.69 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.67 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 55 degrees of freedom
# Reduced chi-squared = 1.267 for 55 degrees of freedom
# Null hypothesis probability = 8.780183e-02
# Null hypothesis probability = 8.798820e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.495e-08 1.974e-08
25- 50 1.231e-07 6.441e-08
50-150 2.955e-07 1.040e-07
15-150 4.535e-07 1.905e-07
Peak spectrum fit
Power-law model
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10899 ( -0.662074 0.564664 )
Norm@50keV : 7.93068E-03 ( -0.0026454 0.00242046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.88 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.424933e-01
Photon flux (15-150 keV) in 1 sec: 0.920694 ( -0.307353 0.316359 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26815e-08 ( -2.3915e-08 2.3943e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12702 ( -1.19119 0.54739 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 8.01103E-03 ( -0.00233984 0.0186806 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.90 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.051611e-01
Photon flux (15-150 keV) in 1 sec: 0.935473 ( -0.323227 0.293077 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26317e-08 ( -2.38587e-08 2.35163e-08 ) ergs/cm2
Band function
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.888887 ( 0.888734 0.888734 )
beta : -1.10902 ( 1.10893 0.662171 )
Epeak [keV] : 47.8695 ( -47.9235 -47.9235 )
Norm@50keV : 1.42512E-02 ( -0.0085922 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.88 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.693665e-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] : 27.6701 (-11.4273 31.3483)
R^2/D10^2 : 1.46056E-02 (-0.0143113 0.0660308)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.838822e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.836e-09 1.188e-09
25- 50 1.094e-08 6.695e-09
50-150 6.078e-08 3.596e-08
15-150 7.355e-08 4.726e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-82.4431 -199.363)
Norm : 4.08314 (-1.20627 1.20627)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.37 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.549368e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.017e-08 6.320e-09
25- 50 1.956e-08 1.179e-08
50-150 4.290e-08 2.545e-08
15-150 7.262e-08 4.458e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.87247 (-4.48587 7.03666)
R1^2/D10^2 : 0.701699 (-0.639619 20.346)
kT2 [keV] : 59.2541 (-57.2329 -60.6778)
R2^2/D10^2 : 1.58475E-03 (-0.00129265 0.0116771)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Null hypothesis probability = 4.016888e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.299e-09 5.715e-09
25- 50 1.719e-08 9.925e-09
50-150 5.977e-08 3.191e-08
15-150 8.526e-08 4.080e-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: 1.30918 ( -0.271062 0.260411 )
Norm@50keV : 5.03804E-03 ( -0.000768186 0.000765856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.18 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 57 degrees of freedom
# Null hypothesis probability = 7.310356e-02
Photon flux (15-150 keV) in 9.556 sec: 0.602078 ( -0.0995611 0.100726 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.74687e-07 ( -7.40681e-08 7.43808e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.820570 ( -1.50369 0.711414 )
Epeak [keV] : 130.033 ( -130.092 -130.092 )
Norm@50keV : 8.58116E-03 ( -0.00419469 0.0331015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.69 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 56 degrees of freedom
# Null hypothesis probability = 6.624294e-02
Photon flux (15-150 keV) in 9.556 sec: 0.588710 ( -0.104891 0.105485 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61542e-07 ( -8.45295e-08 8.09928e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97284 ( -14.8192 -4.97284 )
beta : -1.48593 ( -0.382368 0.321328 )
Epeak [keV] : 31.2974 ( -12.4492 23.3191 )
Norm@50keV : 115.722 ( -17.2291 2452.42 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.27 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 55 degrees of freedom
# Null hypothesis probability = 8.054347e-02
Photon flux (15-150 keV) in 9.556 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.5647e-07 ( -4.56403e-07 -7.8385e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.06e-07
S(50-100 keV) = 1.71e-07
T90 vs. Hardness ratio plot
T90 = 8.71599990129471 sec.
Hardness ratio (energy fluence ratio) = 1.61321
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.26621
Count Ratio (50-100 keV) / (15-25 keV) = 2.03104
Mask shadow pattern
IMX = -1.003910591461702E+00, IMY = 9.576218893147721E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-107.955400 -0.384000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9792 -15.6449 0.3 23.6 -65.3 5.8993 33.8 0.3 Sco X-1
256.0006 -37.8034 5.0 12.3 -143.9 0.3340 2.3 2.5 4U 1700-377
256.4948 -36.4087 5.5 11.1 -140.0 0.2999 2.1 3.0 GX 349+2
263.0294 -24.8981 6.3 4.9 -41.1 0.2561 1.8 9.2 GX 1+4
264.9408 -44.4902 15.0 15.7 178.6 0.1102 0.8 8.8 4U 1735-44
268.4124 -1.4438 77.1 27.5 0.0 0.0240 0.1 2.7 SW J1753.5-0127
270.3446 -25.2052 5.7 5.2 41.5 0.2876 2.2 8.2 GX 5-1
270.3600 -25.7316 4.6 4.8 46.0 0.4316 3.2 3.2 GRS 1758-258
273.8561 -14.0631 7.1 16.4 22.4 0.2338 1.6 8.9 GX 17+2
276.0988 -30.3956 5.3 8.7 97.8 0.3293 2.2 9.2 H1820-303
284.9874 -24.8963 17.5 17.2 76.3 0.1066 0.7 3.0 HT1900.1-2455
288.7899 10.9727 2.9 45.4 27.2 1.4868 3.9 1.7 GRS 1915+105
263.1481 -34.0006 0.0 5.8 -158.7 0.2342 1.7 12.7 GX 354-0
240.4458 -51.5800 2.6 29.7 -151.8 0.7100 4.4 ------ UNKNOWN
188.4839 -73.7394 3.2 59.0 -166.2 3.3909 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.384000 9.172000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8985 -15.7658 4.8 23.6 -65.7 -0.1082 -2.4 8.9 Sco X-1
255.8080 -37.8673 42.3 12.5 -143.6 -0.0107 -0.3 8.6 4U 1700-377
256.6470 -36.3034 0.0 11.0 -140.0 -0.0184 -0.5 12.5 GX 349+2
263.1623 -24.7924 4.4 4.9 -39.2 -0.0986 -2.6 8.8 GX 1+4
264.5407 -44.4419 4.7 15.6 179.6 0.0917 2.5 8.7 4U 1735-44
268.3055 -1.3180 3.5 27.6 -0.2 -0.1357 -3.3 8.9 SW J1753.5-0127
270.4513 -25.0463 6.9 5.4 41.0 -0.0642 -1.7 9.3 GX 5-1
270.3176 -25.5939 3.7 4.9 44.4 0.1164 3.1 9.0 GRS 1758-258
274.1532 -14.1450 4.8 16.5 23.5 0.0931 2.4 10.8 GX 17+2
276.0901 -30.3413 9.9 8.7 97.4 -0.0462 -1.2 8.7 H1820-303
285.0978 -24.9758 24.6 17.3 76.7 -0.0199 -0.5 4.7 HT1900.1-2455
288.8736 10.8005 522.2 45.3 27.4 0.0022 0.0 9.8 GRS 1915+105
262.8058 -33.8830 6.7 5.8 -155.6 -0.0649 -1.7 9.6 GX 354-0
241.9292 -72.1517 1.2 45.2 -174.6 0.6940 9.8 ------ UNKNOWN
225.7877 -43.3258 2.1 35.3 -130.0 0.3291 5.5 ------ UNKNOWN
233.7602 7.7168 1.8 48.1 -50.3 1.1136 6.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
118.644600 962.559900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4746 -40.6413 27.5 56.4 -169.9 1.8576 0.4 5.8 Vela X-1
170.4477 -60.8023 0.0 28.6 -155.5 1.4565 1.5 11.4 Cen X-3
186.6085 -62.8155 4.4 22.1 -144.8 2.5805 2.6 3.0 GX 301-2
255.8448 -37.9413 10.7 34.9 -31.5 1.5148 1.1 8.9 4U 1700-377
256.6903 -36.3970 8.3 36.5 -30.7 2.0405 1.4 12.4 GX 349+2
262.8071 -24.7769 5.7 48.8 -25.4 5.1895 2.0 11.2 GX 1+4
264.5122 -44.4599 8.5 29.7 -17.3 1.3494 1.4 9.9 4U 1735-44
270.1628 -25.0565 6.1 49.6 -16.6 -3.7813 -1.9 6.7 GX 5-1
270.2507 -25.6738 5.2 49.0 -16.4 4.5672 2.2 5.0 GRS 1758-258
275.7900 -30.4177 10.3 45.4 -8.5 2.2863 1.1 7.6 H1820-303
285.0416 -24.9199 179.1 52.8 0.2 0.1873 0.1 0.3 HT1900.1-2455
262.9616 -33.9185 37.2 39.7 -23.1 -0.3957 -0.3 5.2 GX 354-0
88.1945 -70.9081 3.1 36.0 143.4 5.8435 3.7 ------ UNKNOWN
148.0878 -73.3475 3.9 25.1 171.6 3.4949 2.9 ------ UNKNOWN
137.6229 -46.3090 3.1 50.5 -170.7 8.5903 3.7 ------ UNKNOWN
270.8875 -17.6827 2.8 57.0 -17.5 15.3278 4.1 ------ UNKNOWN
147.8938 -35.1869 4.2 58.0 -156.7 17.5644 2.8 ------ UNKNOWN
Plot creation:
Thu May 28 14:08:17 EDT 2015