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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.8448 55.3892 0.0050 49.5577 13.3190 9.2162189 38.277 TRIG_00630714
Foreground time interval of the image:
-11.624 9.180 (delta_t = 20.804 [sec])
Background time interval of the image:
-239.704 -11.624 (delta_t = 228.080 [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 -11.624 sec. to 9.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28292 ( -0.052872 0.0526384 )
Norm@50keV : 3.19790E-02 ( -0.00100379 0.0010033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.08 using 59 PHA bins.
# Reduced chi-squared = 1.703 for 57 degrees of freedom
# Null hypothesis probability = 7.394205e-04
Photon flux (15-150 keV) in 20.8 sec: 3.80344 ( -0.128732 0.128987 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.60084e-06 ( -2.13943e-07 2.14099e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.624 sec. to 9.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.620282 ( -0.240136 0.227836 )
Epeak [keV] : 119.788 ( -17.4528 32.5828 )
Norm@50keV : 6.30135E-02 ( -0.0127839 0.0169074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 56 degrees of freedom
# Null hypothesis probability = 9.565443e-02
Photon flux (15-150 keV) in 20.8 sec: 3.68628 ( -0.13334 0.13376 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.44979e-06 ( -2.24869e-07 2.23912e-07 ) ergs/cm2
Band function
Time interval is from -11.624 sec. to 9.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620245 ( -0.188692 0.241163 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 119.768 ( -10.2177 32.5904 )
Norm@50keV : 6.30144E-02 ( -0.0127968 0.0168889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.100577e-02
Photon flux (15-150 keV) in 20.8 sec: 3.69333 ( ) 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] : 19.2472 ( )
R^2/D10^2 : 0.197978 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.21 using 59 PHA bins.
# Reduced chi-squared = 3.6352 for 57 degrees of freedom
# Null hypothesis probability = 6.333423e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.984e-07 1.830e-08
25- 50 1.448e-06 6.895e-08
50-150 3.953e-06 1.976e-07
15-150 5.700e-06 2.028e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 16.2508 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 164.43 using 59 PHA bins.
# Reduced chi-squared = 2.8848 for 57 degrees of freedom
# Null hypothesis probability = 2.343748e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.417e-07 2.652e-08
25- 50 1.619e-06 5.325e-08
50-150 3.551e-06 1.227e-07
15-150 6.012e-06 2.028e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.16094 (-1.12162 1.23413)
R1^2/D10^2 : 1.29716 (-0.386768 0.61023)
kT2 [keV] : 30.5405 (-3.2724 4.77292)
R2^2/D10^2 : 3.25519E-02 (-0.0132481 0.0171226)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.75 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 55 degrees of freedom
# Null hypothesis probability = 2.206733e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.425e-07 6.542e-08
25- 50 1.579e-06 1.415e-07
50-150 4.363e-06 4.950e-07
15-150 6.484e-06 6.947e-07
Peak spectrum fit
Power-law model
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34597 ( -0.0895191 0.0897011 )
Norm@50keV : 0.104675 ( -0.00601361 0.00601289 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.89 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.616205e-02
Photon flux (15-150 keV) in 1 sec: 12.6000 ( -0.750107 0.750972 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02326e-06 ( -6.30271e-08 6.31574e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.298083 ( -0.453368 0.411455 )
Epeak [keV] : 88.8346 ( -12.3561 23.4413 )
Norm@50keV : 0.326560 ( -0.114931 0.198043 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9533 for 56 degrees of freedom
# Null hypothesis probability = 5.744031e-01
Photon flux (15-150 keV) in 1 sec: 12.2431 ( -0.7616 0.7626 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.92324e-07 ( -6.6232e-08 6.6056e-08 ) ergs/cm2
Band function
Time interval is from 4.360 sec. to 5.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.297986 ( -0.331029 0.492822 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 88.8180 ( -9.03037 23.4469 )
Norm@50keV : 0.326607 ( -0.114928 0.198251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9707 for 55 degrees of freedom
# Null hypothesis probability = 5.364902e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.92453e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.5742 (-1.10955 1.19169)
R^2/D10^2 : 0.917015 (-0.186014 0.230199)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.15 using 59 PHA bins.
# Reduced chi-squared = 1.476 for 57 degrees of freedom
# Null hypothesis probability = 1.117231e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.713e-08 6.125e-09
25- 50 2.595e-07 1.985e-08
50-150 5.779e-07 5.180e-08
15-150 8.945e-07 5.920e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 52.9356 (-3.04982 3.04948)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.55 using 59 PHA bins.
# Reduced chi-squared = 1.413 for 57 degrees of freedom
# Null hypothesis probability = 2.171646e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.318e-07 7.950e-09
25- 50 2.535e-07 1.630e-08
50-150 5.561e-07 4.160e-08
15-150 9.414e-07 6.940e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.19103 (-2.14567 2.79123)
R1^2/D10^2 : 5.51276 (-2.91713 8.3711)
kT2 [keV] : 24.5694 (-3.6088 7.47083)
R2^2/D10^2 : 0.227755 (-0.151458 0.173682)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.22 using 59 PHA bins.
# Reduced chi-squared = 0.9495 for 55 degrees of freedom
# Null hypothesis probability = 5.814707e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.213e-08 3.546e-08
25- 50 2.595e-07 8.010e-08
50-150 6.432e-07 1.792e-07
15-150 9.948e-07 2.579e-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: 1.28292 ( -0.052872 0.0526384 )
Norm@50keV : 3.19790E-02 ( -0.00100379 0.0010033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.08 using 59 PHA bins.
# Reduced chi-squared = 1.703 for 57 degrees of freedom
# Null hypothesis probability = 7.394205e-04
Photon flux (15-150 keV) in 20.8 sec: 3.80344 ( -0.128732 0.128987 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.60084e-06 ( -2.13943e-07 2.14099e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.620282 ( -0.240136 0.227836 )
Epeak [keV] : 119.788 ( -17.4528 32.5828 )
Norm@50keV : 6.30135E-02 ( -0.0127839 0.0169074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 56 degrees of freedom
# Null hypothesis probability = 9.565443e-02
Photon flux (15-150 keV) in 20.8 sec: 3.68628 ( -0.13334 0.13376 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.44979e-06 ( -2.24869e-07 2.23912e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620245 ( -0.188692 0.241163 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 119.768 ( -10.2177 32.5904 )
Norm@50keV : 6.30144E-02 ( -0.0127968 0.0168889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.100577e-02
Photon flux (15-150 keV) in 20.8 sec: 3.69333 ( ) 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) = 1.46e-06
S(50-100 keV) = 2.39e-06
T90 vs. Hardness ratio plot
T90 = 13.607999920845 sec.
Hardness ratio (energy fluence ratio) = 1.63699
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.17629
Count Ratio (50-100 keV) / (15-25 keV) = 2.13461
Mask shadow pattern
IMX = 1.141683724180611E+00, IMY = -2.702815977919790E-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 -11.624000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.6071 35.1968 3.1 48.9 -35.5 2.0686 3.8 0.9 Cyg X-1
308.2225 40.9583 2.7 40.3 -39.0 1.2917 4.3 5.1 Cyg X-3
326.2039 38.1752 11.3 35.2 -60.6 -0.3298 -1.0 8.9 Cyg X-2
278.3379 67.9419 2.1 33.0 13.6 1.2485 5.4 ------ UNKNOWN
30.8390 47.3370 3.1 21.4 -172.5 0.7073 3.7 ------ UNKNOWN
29.0349 27.9877 2.3 38.9 -155.2 1.3431 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-11.624000 9.180000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.3699 35.2885 7.7 48.9 -35.2 0.2663 1.5 12.0 Cyg X-1
308.0553 40.8157 17.0 40.5 -39.0 -0.0691 -0.7 8.6 Cyg X-3
326.3302 38.3896 6.1 35.0 -60.6 -0.1954 -1.9 8.5 Cyg X-2
97.6659 63.9076 2.5 36.4 105.0 0.7930 4.7 ------ UNKNOWN
63.1655 23.1180 2.4 54.9 167.6 1.5331 4.9 ------ UNKNOWN
254.8448 55.3892 0.3 49.6 13.3 9.2167 38.3 ------ UNKNOWN
19.0556 62.2254 2.1 5.9 160.6 0.3326 5.5 ------ UNKNOWN
285.7303 46.4218 2.5 45.6 -15.1 0.5801 4.7 ------ UNKNOWN
13.0558 36.6255 2.7 27.8 -133.9 0.3243 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
809.496610 962.374400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6351 22.0092 0.7 48.4 -157.5 5.6660 16.5 0.3 Crab
189.3679 13.4991 3.1 51.0 31.1 3.0779 3.7 ------ UNKNOWN
174.6777 31.0037 2.4 31.5 14.9 0.8398 4.8 ------ UNKNOWN
89.6394 44.3433 2.3 38.3 -127.3 1.2812 5.0 ------ UNKNOWN
151.3481 76.2895 3.2 43.7 -63.9 2.4864 3.6 ------ UNKNOWN
163.7985 76.3338 2.5 44.9 -60.1 3.0340 4.7 ------ UNKNOWN
Plot creation:
Thu May 28 13:30:44 EDT 2015