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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.0638 -37.4519 1.0105 8.8 83.7 -0.1315 -0.2 TRIG_00557674
------------------------------------------
Foreground time interval of the image:
0.000 768.000 (delta_t = 768.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 4.50931e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.155875e-02
Photon flux (15-150 keV) in 768 sec: 3.37686E-03 ( -0.00337686 0.00460079 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49976e-08 ( -8.49976e-08 1.56732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.751167e-02
Photon flux (15-150 keV) in 768 sec: 5.51485E-03 ( -0.00436845 0.00445687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 7.34008e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.10527 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 13.7396 ( -80 -80 )
Norm@50keV : 10.5528 ( -11.2391 695.387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.35 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065919e-01
Photon flux (15-150 keV) in 768 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] : 3.13124 (-3.11632 3.14278)
R^2/D10^2 : 0.490679 (-0.514376 167.147)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.406277e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.147e-08 5.898e-08
25- 50 1.544e-08 1.197e-08
50-150 3.495e-11 4.044e-11
15-150 1.069e-07 7.837e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.07104 (-6.10339 -6.10339)
Norm : 0.477323 (-0.46735 -0.46735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.11 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.304874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.870e-08 5.257e-08
25- 50 1.498e-08 1.114e-08
50-150 1.897e-10 2.713e-10
15-150 9.388e-08 5.633e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.10577 (-3.1007 3.17285)
R1^2/D10^2 : 0.516892 (-0.523892 163.395)
kT2 [keV] : 0.145302 (-0.145302 -0.145302)
R2^2/D10^2 : 9.98027E-04 (-0.000999681 -0.000999681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.036659e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 4.50931e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.155875e-02
Photon flux (15-150 keV) in 768 sec: 3.37686E-03 ( -0.00337686 0.00460079 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49976e-08 ( -8.49976e-08 1.56732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.751167e-02
Photon flux (15-150 keV) in 768 sec: 5.51485E-03 ( -0.00436845 0.00445687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 7.34008e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.10527 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 13.7396 ( -80 -80 )
Norm@50keV : 10.5528 ( -11.2391 695.387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.35 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065919e-01
Photon flux (15-150 keV) in 768 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] : 3.13124 (-3.11632 3.14278)
R^2/D10^2 : 0.490679 (-0.514376 167.147)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.406277e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.147e-08 6.351e-08
25- 50 1.544e-08 1.268e-08
50-150 3.495e-11 7.972e-11
15-150 1.069e-07 7.780e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.07104 (-6.10339 -6.10339)
Norm : 0.477323 (-0.46735 -0.46735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.11 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.304874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.870e-08 5.556e-08
25- 50 1.498e-08 1.441e-08
50-150 1.897e-10 1.907e-10
15-150 9.388e-08 6.086e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.10577 (-3.1007 3.17285)
R1^2/D10^2 : 0.516892 (-0.523892 163.395)
kT2 [keV] : 0.145302 (-0.145302 -0.145302)
R2^2/D10^2 : 9.98027E-04 (-0.000999681 -0.000999681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.036659e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 4.50931e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.155875e-02
Photon flux (15-150 keV) in 768 sec: 3.37686E-03 ( -0.00337686 0.00460079 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49976e-08 ( -8.49976e-08 1.56732e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.751167e-02
Photon flux (15-150 keV) in 768 sec: 5.51485E-03 ( -0.00436845 0.00445687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 7.34008e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.10527 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 13.7396 ( -80 -80 )
Norm@50keV : 10.5528 ( -11.2391 695.387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.35 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065919e-01
Photon flux (15-150 keV) in 768 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) = 1.79262e-08
S(50-100 keV) = 2.70376e-09
T90 vs. Hardness ratio plot
T90 = 768 sec.
Hardness ratio (energy fluence ratio) = 0.150827
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -0.609833
Count Ratio (50-100 keV) / (15-25 keV) = -0.252312
Mask shadow pattern
IMX = 1.716788778749617E-02, IMY = -1.543861788549412E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 768.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.9901 -62.8711 0.0 39.3 -81.1 -5.1132 -1.3 11.0 GX 301-2
244.9781 -15.6362 0.4 30.4 46.3 36.5015 32.6 0.3 Sco X-1
256.0115 -37.8226 0.9 8.5 84.3 8.9064 13.4 1.8 4U 1700-377
256.4842 -36.4836 4.1 9.9 83.4 1.9257 2.8 4.3 GX 349+2
263.2171 -24.6667 0.0 23.0 87.1 2.0055 2.0 12.3 GX 1+4
264.7679 -44.3866 304.7 9.6 146.3 0.0299 0.0 3.9 4U 1735-44
270.2636 -25.1052 14.2 25.5 101.5 0.9590 0.8 1.9 GX 5-1
270.2892 -25.7894 29.4 24.9 102.4 0.4490 0.4 2.9 GRS 1758-258
274.0073 -14.0371 28.0 36.9 97.0 0.9206 0.4 0.1 GX 17+2
275.7404 -30.4285 16.8 24.3 118.4 -0.6732 -0.7 10.2 H1820-303
285.0990 -25.0158 10.0 34.0 122.8 -1.8973 -1.2 6.7 HT1900.1-2455
262.9674 -33.8121 3.3 14.7 99.7 2.6959 3.5 1.7 GX 354-0
255.3275 -41.7120 2.3 4.8 96.8 3.7995 5.0 ------ UNKNOWN
333.0325 -46.0895 3.9 54.2 -179.3 8.7909 2.9 ------ UNKNOWN
353.3397 -55.5473 3.8 59.6 -161.5 22.7856 3.0 ------ UNKNOWN
187.8186 -18.1471 4.5 58.7 -25.9 12.2113 2.6 ------ UNKNOWN
184.3433 -35.0264 4.0 50.7 -44.5 15.3854 2.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
933.500600 938.440000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4876 35.4947 6.5 7.2 -46.5 0.0454 1.8 9.3 Her X-1
268.3757 -1.5980 7.4 36.2 64.7 -0.1060 -1.5 8.7 SW J1753.5-0127
288.7872 10.8510 6.6 41.2 27.0 0.0899 1.8 5.7 GRS 1915+105
299.7976 35.2485 0.0 42.4 -13.0 -0.0287 -0.7 10.5 Cyg X-1
308.0481 40.8522 5.4 48.2 -21.9 0.1234 2.1 6.7 Cyg X-3
204.8394 -1.4774 2.3 52.7 159.9 0.7207 5.1 ------ UNKNOWN
194.0015 9.6182 2.1 55.3 178.8 0.6122 5.4 ------ UNKNOWN
252.6470 55.4766 2.1 25.8 -77.7 0.1799 5.6 ------ UNKNOWN
Plot creation:
Sat Jun 8 19:54:13 EDT 2013