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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
328.7125 16.8912 0.0032 36.6224 -178.5787 1.8182488 60.643 TRIG_00173780
Foreground time interval of the image:
-0.032 2.092 (delta_t = 2.124 [sec])
Background time interval of the image:
-223.875 -0.032 (delta_t = 223.843 [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 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)
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 -0.032 sec. to 2.092 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39466 ( -0.0544858 0.0544723 )
Norm@50keV : 5.63380E-02 ( -0.00161317 0.00161293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.342475e-01
Photon flux (15-150 keV) in 2.124 sec: 6.85263 ( -0.21709 0.218065 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15752e-06 ( -3.49203e-08 3.4981e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 2.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39177 ( -0.0553948 0.0542987 )
Epeak [keV] : 9998.40 ( -9998.81 -9998.81 )
Norm@50keV : 5.64594E-02 ( -0.00161641 0.00654324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.04 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 56 degrees of freedom
# Null hypothesis probability = 2.996771e-01
Photon flux (15-150 keV) in 2.124 sec: 6.85580 ( -0.11262 0.21132 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15756e-06 ( -3.47253e-08 3.46085e-08 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 2.092 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12032 ( 1.12033 1.12033 )
beta : -1.39466 ( -0.0544125 0.054413 )
Epeak [keV] : 37.1401 ( -37.1376 -37.1376 )
Norm@50keV : 0.110711 ( -0.0522048 7.76563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.691337e-01
Photon flux (15-150 keV) in 2.124 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] : 18.4007 ( )
R^2/D10^2 : 0.381752 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 355.61 using 59 PHA bins.
# Reduced chi-squared = 6.2388 for 57 degrees of freedom
# Null hypothesis probability = 9.278110e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.457e-08 3.207e-09
25- 50 2.565e-07 9.983e-09
50-150 6.339e-07 2.952e-08
15-150 9.450e-07 3.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 28.6635 (-0.825393 0.825041)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.78 using 59 PHA bins.
# Reduced chi-squared = 1.8382 for 57 degrees of freedom
# Null hypothesis probability = 1.189227e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.516e-07 4.864e-09
25- 50 2.917e-07 8.496e-09
50-150 6.398e-07 1.965e-08
15-150 1.083e-06 3.547e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.61307 (-0.923827 1.01702)
R1^2/D10^2 : 5.00603 (-1.7004 2.92099)
kT2 [keV] : 31.6718 (-3.37896 4.7493)
R2^2/D10^2 : 5.11655E-02 (-0.0190029 0.0244012)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.74 using 59 PHA bins.
# Reduced chi-squared = 1.432 for 55 degrees of freedom
# Null hypothesis probability = 1.956578e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.236e-07 1.288e-08
25- 50 2.756e-07 1.827e-08
50-150 7.576e-07 6.011e-08
15-150 1.157e-06 7.753e-08
Peak spectrum fit
Power-law model
Time interval is from -0.028 sec. to 0.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27041 ( -0.0522041 0.0521367 )
Norm@50keV : 0.102082 ( -0.00291305 0.00291161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.64 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 57 degrees of freedom
# Null hypothesis probability = 1.793145e-01
Photon flux (15-150 keV) in 1 sec: 12.1148 ( -0.371958 0.373034 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01624e-06 ( -3.07279e-08 3.07608e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.028 sec. to 0.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19558 ( -0.216378 0.0952368 )
Epeak [keV] : 579.572 ( -657.598 -657.598 )
Norm@50keV : 0.110055 ( -0.00954338 0.0249324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.48 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 56 degrees of freedom
# Null hypothesis probability = 1.595198e-01
Photon flux (15-150 keV) in 1 sec: 12.0629 ( -0.3968 0.3975 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01369e-06 ( -3.2073e-08 2.887e-08 ) ergs/cm2
Band function
Time interval is from -0.028 sec. to 0.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08171 ( 0.90993 0.90993 )
beta : -1.31428 ( 1.31674 0.0919492 )
Epeak [keV] : 228.786 ( -237.923 -237.923 )
Norm@50keV : 0.127156 ( -0.0250153 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.01 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 55 degrees of freedom
# Null hypothesis probability = 1.469583e-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] : 19.5969 ( )
R^2/D10^2 : 0.578085 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 321.84 using 59 PHA bins.
# Reduced chi-squared = 5.6463 for 57 degrees of freedom
# Null hypothesis probability = 1.309602e-38
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.314e-08 2.565e-09
25- 50 2.120e-07 8.250e-09
50-150 6.016e-07 2.895e-08
15-150 8.567e-07 2.985e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 51.2234 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 166.35 using 59 PHA bins.
# Reduced chi-squared = 2.9184 for 57 degrees of freedom
# Null hypothesis probability = 1.228363e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.276e-07 3.800e-09
25- 50 2.454e-07 7.850e-09
50-150 5.381e-07 1.555e-08
15-150 9.110e-07 2.725e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.33697 (-1.05992 1.16563)
R1^2/D10^2 : 5.92832 (-1.94585 3.3252)
kT2 [keV] : 33.5573 (-3.78479 5.57413)
R2^2/D10^2 : 8.14354E-02 (-0.0321184 0.0410393)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.34 using 59 PHA bins.
# Reduced chi-squared = 1.442 for 55 degrees of freedom
# Null hypothesis probability = 1.753100e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.005e-08 9.045e-09
25- 50 2.301e-07 1.500e-08
50-150 6.927e-07 6.555e-08
15-150 1.013e-06 6.820e-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: 1.39466 ( -0.0544858 0.0544723 )
Norm@50keV : 5.63380E-02 ( -0.00161317 0.00161293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.342475e-01
Photon flux (15-150 keV) in 2.124 sec: 6.85263 ( -0.21709 0.218065 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15752e-06 ( -3.49203e-08 3.4981e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39177 ( -0.0553948 0.0542987 )
Epeak [keV] : 9998.40 ( -9998.81 -9998.81 )
Norm@50keV : 5.64594E-02 ( -0.00161641 0.00654324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.04 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 56 degrees of freedom
# Null hypothesis probability = 2.996771e-01
Photon flux (15-150 keV) in 2.124 sec: 6.85580 ( -0.11262 0.21132 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15756e-06 ( -3.47253e-08 3.46085e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12032 ( 1.12033 1.12033 )
beta : -1.39466 ( -0.0544125 0.054413 )
Epeak [keV] : 37.1401 ( -37.1376 -37.1376 )
Norm@50keV : 0.110711 ( -0.0559859 7.76563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.691337e-01
Photon flux (15-150 keV) in 2.124 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) = 2.71e-07
S(50-100 keV) = 4.13e-07
T90 vs. Hardness ratio plot
T90 = 1.39200001955032 sec.
Hardness ratio (energy fluence ratio) = 1.52399
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.30083
Count Ratio (50-100 keV) / (15-25 keV) = 1.2022
Mask shadow pattern
IMX = -7.430423029095083E-01, IMY = 1.843573853546018E-02
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:
-223.875410 -0.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2593 35.4597 0.0 31.3 -4.1 -0.1827 -1.0 12.0 Her X-1
268.3728 -1.4794 27.3 42.3 -70.0 -0.3276 -0.4 1.6 SW J1753.5-0127
288.8034 10.9475 1.0 23.5 -98.2 2.2623 12.1 0.3 GRS 1915+105
299.5954 35.2068 0.2 5.8 150.6 8.4280 57.0 0.4 Cyg X-1
308.1176 40.9471 1.2 14.0 129.1 1.6485 9.9 0.5 Cyg X-3
325.9302 38.3016 0.0 27.0 144.0 0.2889 1.4 11.4 Cyg X-2
308.0334 37.6509 2.3 13.0 142.6 0.7942 5.0 ------ UNKNOWN
253.5291 34.6955 2.4 32.0 -5.4 0.9066 4.7 ------ UNKNOWN
261.5087 13.7542 2.3 34.8 -46.0 1.1761 5.0 ------ UNKNOWN
319.2934 -11.9825 2.9 52.7 -141.1 3.4436 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.032000 2.092000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4546 35.3423 125.4 31.2 -4.4 -0.0023 -0.1 0.1 Her X-1
268.3713 -1.6049 4.5 42.4 -70.1 0.2224 2.5 9.1 SW J1753.5-0127
288.9672 11.0551 7.5 23.4 -98.6 -0.0425 -1.5 11.9 GRS 1915+105
299.6674 35.0157 25.9 5.9 152.5 -0.0092 -0.4 11.8 Cyg X-1
308.0246 41.1546 0.0 14.0 128.2 0.0455 2.0 12.7 Cyg X-3
326.2491 38.1556 7.6 27.3 144.3 -0.0427 -1.5 10.6 Cyg X-2
311.9930 33.7512 2.5 16.1 158.6 0.0992 4.5 ------ UNKNOWN
341.8897 9.1392 2.4 51.6 179.5 0.3077 4.8 ------ UNKNOWN
328.7125 16.8912 0.2 36.6 -178.6 1.8183 60.6 ------ UNKNOWN
335.5700 5.0871 2.0 49.3 -171.2 0.2788 5.7 ------ UNKNOWN
260.3820 23.9530 2.0 29.8 -29.1 0.1423 5.9 ------ UNKNOWN
279.7984 19.8688 2.3 18.3 -66.0 0.1215 4.9 ------ UNKNOWN
227.4760 20.6360 2.7 58.4 -12.9 0.4406 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
71.524590 290.682800
292.224000 302.318300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.8013 10.9748 2.0 39.1 -60.2 2.4122 5.9 1.8 GRS 1915+105
299.5908 35.2037 0.2 31.7 -15.9 8.7165 48.3 0.1 Cyg X-1
308.1094 40.9643 1.4 29.9 1.0 1.3731 8.0 0.7 Cyg X-3
326.3159 38.2764 3.8 21.5 28.1 0.4481 3.0 7.3 Cyg X-2
308.0424 20.2956 2.6 19.8 -43.8 0.7076 4.5 ------ UNKNOWN
347.0517 -39.9776 3.5 59.4 -163.1 4.8915 3.3 ------ UNKNOWN
311.0822 -3.7825 2.3 27.0 -105.2 1.0067 4.9 ------ UNKNOWN
265.3358 36.0675 2.3 58.8 -24.5 5.4058 5.0 ------ UNKNOWN
278.0306 16.0245 2.4 48.4 -50.2 3.5392 4.8 ------ UNKNOWN
Plot creation:
Sun May 31 14:54:08 EDT 2015