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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
323.5221 48.7139 0.0048 19.9341 72.9909 3.0674038 39.920 TRIG_00335647
Foreground time interval of the image:
-21.528 11.333 (delta_t = 32.861 [sec])
Background time interval of the image:
-239.568 -21.528 (delta_t = 218.040 [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 -21.528 sec. to 56.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20609 ( -0.0626119 0.0622731 )
Norm@50keV : 4.34667E-03 ( -0.000145001 0.000144889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.69 using 59 PHA bins.
# Reduced chi-squared = 0.8192 for 57 degrees of freedom
# Null hypothesis probability = 8.332612e-01
Photon flux (15-150 keV) in 78.44 sec: 0.510651 ( -0.0181073 0.0181472 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45318e-06 ( -1.23545e-07 1.23815e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.528 sec. to 56.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06039 ( -0.251705 0.187152 )
Epeak [keV] : 366.207 ( -366.222 -366.222 )
Norm@50keV : 5.04805E-03 ( -0.000863847 0.00143886 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.62 using 59 PHA bins.
# Reduced chi-squared = 0.8147 for 56 degrees of freedom
# Null hypothesis probability = 8.375682e-01
Photon flux (15-150 keV) in 78.44 sec: 0.506014 ( -0.019528 0.019562 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4243e-06 ( -1.34297e-07 1.33544e-07 ) ergs/cm2
Band function
Time interval is from -21.528 sec. to 56.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.538396 ( 0.625208 0.625208 )
beta : -1.25154 ( 1.25138 0.0869679 )
Epeak [keV] : 77.0971 ( -76.8864 294.003 )
Norm@50keV : 1.10553E-02 ( -0.00558539 243323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.18 using 59 PHA bins.
# Reduced chi-squared = 0.8215 for 55 degrees of freedom
# Null hypothesis probability = 8.247605e-01
Photon flux (15-150 keV) in 78.44 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] : 19.8183 ( )
R^2/D10^2 : 2.36116E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 204.64 using 59 PHA bins.
# Reduced chi-squared = 3.5901 for 57 degrees of freedom
# Null hypothesis probability = 1.632597e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-07 9.374e-09
25- 50 6.968e-07 3.404e-08
50-150 2.026e-06 1.165e-07
15-150 2.864e-06 1.177e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 ( )
Norm : 2.15668 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 139.08 using 59 PHA bins.
# Reduced chi-squared = 2.4400 for 57 degrees of freedom
# Null hypothesis probability = 8.212199e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.212e-07 1.530e-08
25- 50 8.104e-07 2.981e-08
50-150 1.777e-06 6.550e-08
15-150 3.009e-06 1.043e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.48428 (-1.22533 1.36761)
R1^2/D10^2 : 0.227099 (-0.0812675 0.145253)
kT2 [keV] : 33.7902 (-4.53854 7.27866)
R2^2/D10^2 : 3.49539E-03 (-0.00161125 0.0021818)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.85 using 59 PHA bins.
# Reduced chi-squared = 0.9065 for 55 degrees of freedom
# Null hypothesis probability = 6.709821e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.868e-07 3.640e-08
25- 50 7.597e-07 7.060e-08
50-150 2.383e-06 2.930e-07
15-150 3.430e-06 3.373e-07
Peak spectrum fit
Power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.988378 ( -0.0999745 0.0989733 )
Norm@50keV : 3.21506E-02 ( -0.0018103 0.00180728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.07 using 59 PHA bins.
# Reduced chi-squared = 0.8259 for 57 degrees of freedom
# Null hypothesis probability = 8.228669e-01
Photon flux (15-150 keV) in 1 sec: 3.69984 ( -0.211016 0.210512 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.48987e-07 ( -2.17224e-08 2.20172e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.799313 ( -0.407337 0.234812 )
Epeak [keV] : 366.373 ( -366.374 -366.374 )
Norm@50keV : 3.90403E-02 ( -0.00822051 0.0193895 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.35 using 59 PHA bins.
# Reduced chi-squared = 0.8277 for 56 degrees of freedom
# Null hypothesis probability = 8.175752e-01
Photon flux (15-150 keV) in 1 sec: 3.67224 ( -0.21758 0.21731 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.46292e-07 ( -2.2964e-08 2.2807e-08 ) ergs/cm2
Band function
Time interval is from 0.752 sec. to 1.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.788414 ( 0.817437 5.81363 )
beta : -1.18005 ( 1.19216 0.288346 )
Epeak [keV] : 343.196 ( -343.36 -343.36 )
Norm@50keV : 3.95776E-02 ( -0.00875706 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.34 using 59 PHA bins.
# Reduced chi-squared = 0.8425 for 55 degrees of freedom
# Null hypothesis probability = 7.908178e-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] : 22.2594 (-1.71489 1.91316)
R^2/D10^2 : 0.128305 (-0.0287972 0.0363081)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.10 using 59 PHA bins.
# Reduced chi-squared = 1.703 for 57 degrees of freedom
# Null hypothesis probability = 7.375013e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.170e-08 1.335e-09
25- 50 6.231e-08 5.085e-09
50-150 2.307e-07 2.070e-08
15-150 3.047e-07 2.305e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 ( )
Norm : 14.7620 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.88 using 59 PHA bins.
# Reduced chi-squared = 2.2962 for 57 degrees of freedom
# Null hypothesis probability = 9.672013e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.676e-08 2.450e-09
25- 50 7.071e-08 5.445e-09
50-150 1.551e-07 3.437e-08
15-150 2.625e-07 4.130e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.99271 (-1.99017 2.68413)
R1^2/D10^2 : 1.61375 (-0.899837 2.49767)
kT2 [keV] : 33.8733 (-5.72179 12.0962)
R2^2/D10^2 : 3.05198E-02 (-0.0185593 0.0251475)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.52 using 59 PHA bins.
# Reduced chi-squared = 0.8640 for 55 degrees of freedom
# Null hypothesis probability = 7.530295e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.370e-08 7.295e-09
25- 50 6.531e-08 1.476e-08
50-150 2.592e-07 6.390e-08
15-150 3.482e-07 6.840e-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: 1.22056 ( -0.0750866 0.0746609 )
Norm@50keV : 6.06161E-03 ( -0.000242344 0.000242243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.97 using 59 PHA bins.
# Reduced chi-squared = 0.6486 for 57 degrees of freedom
# Null hypothesis probability = 9.817472e-01
Photon flux (15-150 keV) in 32.86 sec: 0.713636 ( -0.0301567 0.0302508 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00927e-06 ( -8.73774e-08 8.77398e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12801 ( -0.303181 0.0883694 )
Epeak [keV] : 490.227 ( -700.608 -884.143 )
Norm@50keV : 6.67611E-03 ( -0.000522996 0.00221925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.08 using 59 PHA bins.
# Reduced chi-squared = 0.6621 for 56 degrees of freedom
# Null hypothesis probability = 9.759774e-01
Photon flux (15-150 keV) in 32.86 sec: 0.710352 ( -0.028315 0.03437 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00329e-06 ( -9.40979e-08 9.233e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.870275 ( 0.875342 0.875342 )
beta : -1.25732 ( 1.25716 0.104914 )
Epeak [keV] : 122.220 ( -125.368 -125.368 )
Norm@50keV : 9.69649E-03 ( -0.00365344 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.51 using 59 PHA bins.
# Reduced chi-squared = 0.6638 for 55 degrees of freedom
# Null hypothesis probability = 9.741858e-01
Photon flux (15-150 keV) in 32.86 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) = 7.28e-07
S(50-100 keV) = 1.26e-06
T90 vs. Hardness ratio plot
T90 = 57.6480000019073 sec.
Hardness ratio (energy fluence ratio) = 1.73077
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.63116
Count Ratio (50-100 keV) / (15-25 keV) = 1.54356
Mask shadow pattern
IMX = 1.060888796040506E-01, IMY = -3.468050399278023E-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:
-239.568000 -21.528000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4596 35.3451 1.8 37.7 -50.9 2.0342 6.2 0.2 Her X-1
288.7955 10.9375 0.9 28.3 -126.0 3.1915 13.4 0.5 GRS 1915+105
299.5955 35.2014 0.2 2.2 -107.0 10.3016 57.9 0.3 Cyg X-1
308.0033 40.7576 0.0 6.4 76.2 0.2146 1.2 12.7 Cyg X-3
326.2592 38.1915 5.1 19.6 105.0 0.5146 2.2 8.8 Cyg X-2
284.2068 28.4307 2.3 16.8 -88.0 0.9480 5.1 ------ UNKNOWN
309.7055 -20.9728 2.1 58.3 -162.2 5.9991 5.5 ------ UNKNOWN
291.0328 -5.5561 2.9 43.5 -137.9 1.4537 3.9 ------ UNKNOWN
268.9864 7.9682 3.1 41.3 -99.4 3.7500 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-21.528000 11.332620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3911 35.2643 14.6 37.8 -51.0 -0.0908 -0.8 5.7 Her X-1
288.8460 11.1288 0.0 28.1 -126.0 -0.1852 -2.3 11.3 GRS 1915+105
299.5976 35.2045 15.7 2.2 -107.0 -0.0453 -0.7 0.4 Cyg X-1
307.9237 41.0555 13.2 6.5 73.7 0.0560 0.9 10.5 Cyg X-3
325.9962 38.2462 8.7 19.4 104.9 0.1010 1.3 9.4 Cyg X-2
323.5221 48.7139 0.3 19.9 73.0 3.0674 39.9 ------ UNKNOWN
266.2687 63.1668 2.3 34.0 -1.1 0.4182 5.0 ------ UNKNOWN
251.0601 25.9289 3.0 44.0 -62.7 1.0741 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
54.932600 542.442000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5977 35.2082 0.6 22.2 -97.4 21.9516 20.9 0.5 Cyg X-1
308.3573 40.9380 10.5 13.2 -99.1 1.0661 1.1 11.2 Cyg X-3
326.2009 38.4068 5.2 10.5 -170.5 2.0889 2.2 5.3 Cyg X-2
247.9721 73.7942 2.9 39.9 -3.7 5.7144 4.0 ------ UNKNOWN
337.5949 -5.5138 2.3 55.6 -175.8 22.2924 5.1 ------ UNKNOWN
286.2697 20.1329 2.8 41.2 -99.2 16.4374 4.1 ------ UNKNOWN
Plot creation:
Sun May 31 05:29:01 EDT 2015