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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
302.4081 4.7471 0.0220 22.4968 -63.6512 0.3837651 8.742 TRIG_00339295
Foreground time interval of the image:
0.304 12.896 (delta_t = 12.592 [sec])
Background time interval of the image:
-239.704 0.304 (delta_t = 240.008 [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 0.304 sec. to 12.896 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63677 ( -0.266597 0.27627 )
Norm@50keV : 1.96367E-03 ( -0.000363724 0.00035791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.302737e-01
Photon flux (15-150 keV) in 12.59 sec: 0.255299 ( -0.0421889 0.0421968 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.30245e-07 ( -4.46701e-08 4.61644e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.304 sec. to 12.896 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.302921 ( -2.44872 1.44802 )
Epeak [keV] : 48.6623 ( -10.3133 29.8929 )
Norm@50keV : 2.63700E-02 ( -0.026671 0.84567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.23 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 56 degrees of freedom
# Null hypothesis probability = 2.363154e-01
Photon flux (15-150 keV) in 12.59 sec: 0.240540 ( -0.042586 0.043049 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89127e-07 ( -4.45787e-08 5.20382e-08 ) ergs/cm2
Band function
Time interval is from 0.304 sec. to 12.896 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.255160 ( -0.688411 1.42017 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 49.0508 ( -9.82527 29.5986 )
Norm@50keV : 2.46118E-02 ( -0.00394882 0.849555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.23 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.084574e-01
Photon flux (15-150 keV) in 12.59 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03004e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.2989 (-1.80239 2.28646)
R^2/D10^2 : 8.25213E-02 (-0.0407344 0.0737912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.47 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 57 degrees of freedom
# Null hypothesis probability = 2.316991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.785e-08 8.322e-09
25- 50 8.147e-08 1.934e-08
50-150 5.995e-08 2.602e-08
15-150 1.693e-07 4.053e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 124.311 (-56.5207 -122.353)
Norm : 1.09055 (-0.193187 0.265049)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.58 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 57 degrees of freedom
# Null hypothesis probability = 1.805522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.571e-08 2.028e-08
25- 50 6.427e-08 3.589e-08
50-150 1.167e-07 7.711e-08
15-150 2.166e-07 1.319e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.57263 (-8.71969 3.2103)
R1^2/D10^2 : 0.160483 (-0.155214 0.372816)
kT2 [keV] : 22.1554 (-18.0595 -24.4439)
R2^2/D10^2 : 3.27419E-03 (-0.00244661 0.0791093)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.79 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.465513e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.186e-08 2.094e-08
25- 50 7.514e-08 4.848e-08
50-150 9.084e-08 5.563e-08
15-150 1.978e-07 1.157e-07
Peak spectrum fit
Power-law model
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40571 ( -0.258618 0.26206 )
Norm@50keV : 8.59270E-03 ( -0.00136388 0.00135129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.18 using 59 PHA bins.
# Reduced chi-squared = 0.8277 for 57 degrees of freedom
# Null hypothesis probability = 8.199289e-01
Photon flux (15-150 keV) in 1 sec: 1.04779 ( -0.160598 0.160698 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.29325e-08 ( -1.46505e-08 1.49457e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.809342 ( -1.13833 0.781696 )
Epeak [keV] : 98.4736 ( )
Norm@50keV : 1.73956E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.98 using 59 PHA bins.
# Reduced chi-squared = 0.8211 for 56 degrees of freedom
# Null hypothesis probability = 8.278934e-01
Photon flux (15-150 keV) in 1 sec: 1.02485 ( -0.164489 0.16448 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.91777e-08 ( -1.57092e-08 1.6071e-08 ) ergs/cm2
Band function
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.879350 ( -0.554509 1.17892 )
beta : -9.36918 ( 9.37146 19.3715 )
Epeak [keV] : 103.918 ( -52.2331 -104.096 )
Norm@50keV : 1.61302E-02 ( -0.00852537 0.0487727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.99 using 59 PHA bins.
# Reduced chi-squared = 0.8363 for 55 degrees of freedom
# Null hypothesis probability = 8.012368e-01
Photon flux (15-150 keV) in 1 sec: 1.02752 ( 5.97248 -0.156177 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.96408e-08 ( -7.96338e-08 -1.62206e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4690 (-2.98408 3.81566)
R^2/D10^2 : 0.109802 (-0.0579981 0.119992)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.43 using 59 PHA bins.
# Reduced chi-squared = 0.9548 for 57 degrees of freedom
# Null hypothesis probability = 5.722417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.471e-09 1.701e-09
25- 50 2.235e-08 5.815e-09
50-150 3.689e-08 1.219e-08
15-150 6.471e-08 1.651e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-79.957 -199.363)
Norm : 4.30363 (-0.655399 0.655398)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.12 using 59 PHA bins.
# Reduced chi-squared = 0.8266 for 57 degrees of freedom
# Null hypothesis probability = 8.216912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.072e-08 6.185e-09
25- 50 2.061e-08 1.180e-08
50-150 4.521e-08 2.557e-08
15-150 7.654e-08 4.365e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.84019 (-2.66805 3.60419)
R1^2/D10^2 : 1.04947 (-0.759697 5.3422)
kT2 [keV] : 25.2007 (-7.36365 18.6695)
R2^2/D10^2 : 1.66877E-02 (-0.0143041 0.042937)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.8123 for 55 degrees of freedom
# Null hypothesis probability = 8.386706e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.530e-09 5.640e-09
25- 50 2.052e-08 1.076e-08
50-150 5.065e-08 2.882e-08
15-150 8.070e-08 4.260e-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: 1.63677 ( -0.266597 0.27627 )
Norm@50keV : 1.96367E-03 ( -0.000363724 0.00035791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.302737e-01
Photon flux (15-150 keV) in 12.59 sec: 0.255299 ( -0.0421889 0.0421968 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.30245e-07 ( -4.46701e-08 4.61644e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.302921 ( -2.44872 1.44802 )
Epeak [keV] : 48.6623 ( -10.3133 29.8929 )
Norm@50keV : 2.63700E-02 ( -0.026671 0.84567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.23 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 56 degrees of freedom
# Null hypothesis probability = 2.363154e-01
Photon flux (15-150 keV) in 12.59 sec: 0.240540 ( -0.042586 0.043049 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89127e-07 ( -4.45787e-08 5.20382e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.255160 ( -0.688411 1.42017 )
beta : -10.00000 ( 10 3.9968e-11 )
Epeak [keV] : 49.0508 ( -9.82527 29.5986 )
Norm@50keV : 2.46118E-02 ( -0.00394882 0.849555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.23 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.084574e-01
Photon flux (15-150 keV) in 12.59 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03004e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 6.07e-08
S(50-100 keV) = 7.81e-08
T90 vs. Hardness ratio plot
T90 = 12.0840000212193 sec.
Hardness ratio (energy fluence ratio) = 1.28666
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.39158
Count Ratio (50-100 keV) / (15-25 keV) = 0.747399
Mask shadow pattern
IMX = 1.838131844421850E-01, IMY = 3.711207899623837E-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:
-239.704000 0.304000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.7764 10.9486 1.2 31.4 -36.8 2.3661 9.2 1.3 GRS 1915+105
299.5834 35.2056 0.4 24.4 19.3 6.7163 30.8 0.4 Cyg X-1
308.0854 40.9848 1.5 24.3 40.9 1.7815 7.8 2.2 Cyg X-3
326.2165 38.2234 5.9 19.9 77.6 0.4670 1.9 6.3 Cyg X-2
291.1140 57.4075 2.9 44.0 41.4 2.4341 4.0 ------ UNKNOWN
13.4975 3.5339 2.9 54.3 163.3 4.5756 4.0 ------ UNKNOWN
269.2900 29.6840 2.8 47.2 -3.2 1.6774 4.1 ------ UNKNOWN
273.3747 -1.7047 3.0 50.5 -45.4 4.5677 3.9 ------ UNKNOWN
303.9722 -18.5668 3.7 40.9 -92.5 3.4882 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.304000 12.896000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.7902 10.9942 14.4 31.3 -36.7 -0.0372 -0.8 3.0 GRS 1915+105
299.5548 35.1749 6.3 24.4 19.2 0.0771 1.8 2.4 Cyg X-1
308.1380 40.8330 10.8 24.1 40.8 0.0504 1.1 7.3 Cyg X-3
326.1090 38.5187 0.0 20.1 77.1 -0.1023 -2.1 12.2 Cyg X-2
359.1220 42.7505 2.5 40.4 109.0 0.7263 4.7 ------ UNKNOWN
277.6106 16.2390 2.5 40.6 -23.5 0.2495 4.6 ------ UNKNOWN
302.4081 4.7472 1.3 22.5 -63.7 0.3837 8.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
368.396600 962.416000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6355 22.0080 0.2 24.3 122.7 26.1086 48.9 0.4 Crab
122.1008 28.7485 2.5 40.2 59.7 6.3705 4.7 ------ UNKNOWN
52.1811 2.7798 2.7 47.1 174.1 3.8073 4.2 ------ UNKNOWN
107.0907 56.2953 2.8 22.6 11.3 1.7051 4.0 ------ UNKNOWN
178.7683 64.5774 3.3 55.1 -7.6 5.6271 3.5 ------ UNKNOWN
32.7373 -0.0620 2.8 58.8 -166.0 12.1613 4.1 ------ UNKNOWN
234.8645 83.2232 4.3 51.1 -35.1 4.4877 2.7 ------ UNKNOWN
11.5817 53.2742 3.8 40.9 -93.2 7.8230 3.1 ------ UNKNOWN
Plot creation:
Sun May 31 05:05:12 EDT 2015