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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.8658 31.7511 0.0064 30.1980 0.5788 1.7227268 30.222 TRIG_00621234
Foreground time interval of the image:
-0.060 10.949 (delta_t = 11.009 [sec])
Background time interval of the image:
-239.152 -0.060 (delta_t = 239.092 [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 -0.060 sec. to 12.136 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46017 ( -0.0887968 0.088904 )
Norm@50keV : 1.01740E-02 ( -0.000521646 0.000521084 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.71 using 59 PHA bins.
# Reduced chi-squared = 0.8370 for 57 degrees of freedom
# Null hypothesis probability = 8.048811e-01
Photon flux (15-150 keV) in 12.2 sec: 1.25700 ( -0.0662881 0.066388 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18557e-06 ( -6.61321e-08 6.63885e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.060 sec. to 12.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06450 ( -0.367803 0.339256 )
Epeak [keV] : 121.704 ( -35.9012 338.3 )
Norm@50keV : 1.59367E-02 ( -0.00497418 0.00798733 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7799 for 56 degrees of freedom
# Null hypothesis probability = 8.846982e-01
Photon flux (15-150 keV) in 12.2 sec: 1.23290 ( -0.06929 0.06932 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15365e-06 ( -7.24058e-08 7.21862e-08 ) ergs/cm2
Band function
Time interval is from -0.060 sec. to 12.136 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06449 ( -0.280938 0.430398 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 121.684 ( -24.4704 340.368 )
Norm@50keV : 1.59353E-02 ( -0.00497334 0.00798885 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7941 for 55 degrees of freedom
# Null hypothesis probability = 8.642484e-01
Photon flux (15-150 keV) in 12.2 sec: 1.23265 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15491e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7820 ( )
R^2/D10^2 : 0.119343 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.74 using 59 PHA bins.
# Reduced chi-squared = 2.1533 for 57 degrees of freedom
# Null hypothesis probability = 1.014959e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.521e-08 7.253e-09
25- 50 3.127e-07 2.190e-08
50-150 5.416e-07 5.435e-08
15-150 9.295e-07 6.100e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.16134 (-0.263674 0.26368)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.47 using 59 PHA bins.
# Reduced chi-squared = 0.8328 for 57 degrees of freedom
# Null hypothesis probability = 8.117771e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.575e-07 8.662e-09
25- 50 3.030e-07 1.879e-08
50-150 6.645e-07 4.343e-08
15-150 1.125e-06 1.419e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.63701 (-1.16418 1.28298)
R1^2/D10^2 : 0.934807 (-0.363121 0.679438)
kT2 [keV] : 27.9481 (-4.29009 6.70933)
R2^2/D10^2 : 1.28725E-02 (-0.00677282 0.0108328)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.08 using 59 PHA bins.
# Reduced chi-squared = 0.7287 for 55 degrees of freedom
# Null hypothesis probability = 9.346234e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 2.675e-08
25- 50 3.067e-07 5.063e-08
50-150 7.194e-07 1.825e-07
15-150 1.162e-06 2.200e-07
Peak spectrum fit
Power-law model
Time interval is from 4.100 sec. to 5.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11354 ( -0.106849 0.105636 )
Norm@50keV : 3.37020E-02 ( -0.00220365 0.00220299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.618685e-01
Photon flux (15-150 keV) in 1 sec: 3.91449 ( -0.261937 0.262183 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50854e-07 ( -2.50364e-08 2.51216e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.100 sec. to 5.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.381130 ( -0.495822 0.443405 )
Epeak [keV] : 120.862 ( -28.672 97.1127 )
Norm@50keV : 7.45241E-02 ( -0.0278329 0.050427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9227 for 56 degrees of freedom
# Null hypothesis probability = 6.392181e-01
Photon flux (15-150 keV) in 1 sec: 3.83003 ( -0.26746 0.26741 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.38775e-07 ( -2.6903e-08 2.6743e-08 ) ergs/cm2
Band function
Time interval is from 4.100 sec. to 5.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.74444 ( -1.43051 -0.80277 )
beta : -1.36572 ( 1.391 0.207769 )
Epeak [keV] : 46.7213 ( -21.5522 96.8863 )
Norm@50keV : 1.84015 ( -1.79947 174.992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.62 using 59 PHA bins.
# Reduced chi-squared = 0.9022 for 55 degrees of freedom
# Null hypothesis probability = 6.795673e-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] : 19.4393 (-1.56326 1.74427)
R^2/D10^2 : 0.207898 (-0.051063 0.0659806)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.48 using 59 PHA bins.
# Reduced chi-squared = 1.377 for 57 degrees of freedom
# Null hypothesis probability = 3.114016e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.531e-08 1.995e-09
25- 50 7.483e-08 6.855e-09
50-150 2.087e-07 2.210e-08
15-150 2.988e-07 2.560e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 16.0270 (-1.08051 1.08043)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.05 using 59 PHA bins.
# Reduced chi-squared = 1.7552 for 57 degrees of freedom
# Null hypothesis probability = 3.721102e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.992e-08 2.950e-09
25- 50 7.678e-08 6.865e-09
50-150 1.684e-07 4.773e-08
15-150 2.851e-07 4.900e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.82318 (-2.49409 3.06841)
R1^2/D10^2 : 1.02248 (-0.492406 1.21562)
kT2 [keV] : 32.5703 (-7.28323 21.8539)
R2^2/D10^2 : 2.97607E-02 (-0.0239451 0.0447201)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8970 for 55 degrees of freedom
# Null hypothesis probability = 6.900059e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.466e-08 8.649e-09
25- 50 7.827e-08 1.914e-08
50-150 2.398e-07 1.064e-07
15-150 3.427e-07 1.279e-07
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: 1.44715 ( -0.0909023 0.0909887 )
Norm@50keV : 1.03678E-02 ( -0.000548718 0.000548147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.17 using 59 PHA bins.
# Reduced chi-squared = 0.7222 for 57 degrees of freedom
# Null hypothesis probability = 9.433915e-01
Photon flux (15-150 keV) in 11.01 sec: 1.27679 ( -0.0693722 0.0694711 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0929e-06 ( -6.30156e-08 6.32747e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.987683 ( -0.386925 0.35478 )
Epeak [keV] : 113.227 ( -30.4007 185.959 )
Norm@50keV : 1.74737E-02 ( -0.00567018 0.00930954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.14 using 59 PHA bins.
# Reduced chi-squared = 0.6454 for 56 degrees of freedom
# Null hypothesis probability = 9.818867e-01
Photon flux (15-150 keV) in 11.01 sec: 1.24937 ( -0.07241 0.07242 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05896e-06 ( -6.90327e-08 6.88698e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01698 ( -0.318197 0.369039 )
beta : -9.17231 ( 9.3666 19.3666 )
Epeak [keV] : 119.926 ( -22.3792 54.2279 )
Norm@50keV : 1.67522E-02 ( -0.0043857 0.00566252 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.19 using 59 PHA bins.
# Reduced chi-squared = 0.6580 for 55 degrees of freedom
# Null hypothesis probability = 9.764857e-01
Photon flux (15-150 keV) in 11.01 sec: 1.25512 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06535e-06 ( -1.06527e-06 -6.6311e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.87e-07
S(50-100 keV) = 4.18e-07
T90 vs. Hardness ratio plot
T90 = 10.5079999566078 sec.
Hardness ratio (energy fluence ratio) = 1.45645
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.56751
Count Ratio (50-100 keV) / (15-25 keV) = 1.21795
Mask shadow pattern
IMX = 5.819381555698157E-01, IMY = -5.878992609027462E-03
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:
-239.152000 -0.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6307 35.2927 8.0 28.5 9.6 0.4237 1.4 9.0 Her X-1
268.3209 -1.2611 7.7 25.2 -84.8 0.4625 1.5 11.8 SW J1753.5-0127
273.8621 -14.0258 28.1 35.0 -104.7 0.2551 0.4 8.4 GX 17+2
284.9583 -24.9897 11.5 45.1 -122.3 1.1020 1.0 5.9 HT1900.1-2455
288.7778 10.9414 0.7 11.2 -155.1 3.8527 16.2 1.2 GRS 1915+105
299.5942 35.2109 0.8 21.7 103.5 4.7932 15.1 0.6 Cyg X-1
308.1302 40.9800 3.9 30.5 102.4 1.3397 3.0 1.9 Cyg X-3
320.6448 -22.9007 2.8 57.2 -161.7 5.3887 4.1 ------ UNKNOWN
237.7604 7.6466 3.6 44.5 -38.3 1.6369 3.2 ------ UNKNOWN
226.9698 8.0451 2.6 54.5 -33.0 5.9790 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.060000 10.948600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4243 35.4855 10.5 28.7 9.8 -0.0628 -1.1 8.7 Her X-1
268.1818 -1.5267 0.0 25.5 -84.8 -0.0272 -0.4 12.0 SW J1753.5-0127
273.9609 -14.1399 4.0 35.1 -104.9 0.2644 2.9 6.7 GX 17+2
284.8068 -24.9918 832.8 45.1 -122.1 0.0029 0.0 13.2 HT1900.1-2455
288.9787 10.9610 295.1 11.3 -156.0 0.0019 0.0 10.7 GRS 1915+105
299.4616 35.0940 4.5 21.5 103.5 0.1540 2.5 9.0 Cyg X-1
308.1136 41.1569 0.0 30.6 102.1 -0.0966 -1.0 12.3 Cyg X-3
250.8658 31.7511 0.4 30.2 0.6 1.7226 30.2 ------ UNKNOWN
304.5310 -1.9226 2.2 31.2 -166.2 0.3025 5.3 ------ UNKNOWN
233.8197 10.8775 2.2 47.2 -32.2 0.5467 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
68.948600 530.148600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2896 35.2427 4.9 4.5 138.2 -0.9142 -2.3 10.2 Her X-1
268.3563 -1.5193 7.8 37.2 -109.9 1.4031 1.5 4.1 SW J1753.5-0127
288.8056 10.9361 0.8 40.7 -147.9 9.0200 13.8 0.7 GRS 1915+105
299.5989 35.2045 0.9 40.4 171.3 8.9259 12.5 0.5 Cyg X-1
308.2103 40.8442 5.4 46.3 161.7 2.5666 2.2 7.9 Cyg X-3
205.5587 43.1477 4.7 37.2 40.9 2.0298 2.5 ------ UNKNOWN
193.1677 13.9313 3.6 55.4 5.2 7.6909 3.3 ------ UNKNOWN
244.6453 12.3018 2.8 20.3 -62.3 1.9184 4.2 ------ UNKNOWN
304.0283 7.3293 3.2 55.1 -155.7 5.5845 3.6 ------ UNKNOWN
259.2174 -8.3368 3.8 40.9 -92.8 6.7266 3.1 ------ UNKNOWN
Plot creation:
Thu May 28 13:53:31 EDT 2015