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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
118.0532 -54.0070 0.0744 32.1 -151.5 0.0747 2.6 TRIG_00658045
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-35.295 -10.496 (delta_t = 24.799 [sec])
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
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)
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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14582 ( 2.13942 3.96602 )
Norm@50keV : 1.55686E-04 ( -0.000162443 0.00520016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.409716e-01
Photon flux (15-150 keV) in 1.024 sec: 0.314985 7.88258E-02 ( -0.31224 0.322927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97846e-16 ( -3.73707e-08 3.76862e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.80082E-02 ( 0.112682 0.112682 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.35259E-03 ( -0.00235456 -0.00235456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8333 for 56 degrees of freedom
# Null hypothesis probability = 8.085513e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317189 9.17935E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2358e-08 ( -1.89548e-08 3.7821e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.185001 ( 0.185001 0.185001 )
beta : -2.86975E-03 ( 0.00286977 0.00286977 )
Epeak [keV] : 28.3943 ( -28.3943 -28.3943 )
Norm@50keV : 3.19772E-03 ( -0.00319774 16127.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 55 degrees of freedom
# Null hypothesis probability = 7.807197e-01
Photon flux (15-150 keV) in 1.024 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] : 196.409 (-196.307 -196.307)
R^2/D10^2 : 1.50885E-04 (-0.000151088 0.204051)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8224 for 57 degrees of freedom
# Null hypothesis probability = 8.283589e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8808 for 57 degrees of freedom
# Null hypothesis probability = 7.259806e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.2418 (-13.2094 -13.2094)
R1^2/D10^2 : 3.07219E-02 (-0.0299288 -0.0299288)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.14757E-04 (-0.00011899 0.142581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.84 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 55 degrees of freedom
# Reduced chi-squared = 0.8440 for 55 degrees of freedom
# Null hypothesis probability = 7.752457e-01
# Null hypothesis probability = 7.883421e-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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14582 ( 2.13942 3.96602 )
Norm@50keV : 1.55686E-04 ( -0.000162443 0.00520016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.409716e-01
Photon flux (15-150 keV) in 1.024 sec: 0.314985 7.88258E-02 ( -0.31224 0.322927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97846e-16 ( -3.73707e-08 3.76862e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.80082E-02 ( 0.112682 0.112682 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.35259E-03 ( -0.00235456 -0.00235456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8333 for 56 degrees of freedom
# Null hypothesis probability = 8.085513e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317189 9.17935E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2358e-08 ( -1.89548e-08 3.7821e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.185001 ( 0.185001 0.185001 )
beta : -2.86975E-03 ( 0.00286977 0.00286977 )
Epeak [keV] : 28.3943 ( -28.3943 -28.3943 )
Norm@50keV : 3.19772E-03 ( -0.00319774 16127.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 55 degrees of freedom
# Null hypothesis probability = 7.807197e-01
Photon flux (15-150 keV) in 1.024 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] : 196.409 (-196.307 -196.307)
R^2/D10^2 : 1.50885E-04 (-0.000151088 0.204051)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8224 for 57 degrees of freedom
# Null hypothesis probability = 8.283589e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8808 for 57 degrees of freedom
# Null hypothesis probability = 7.259806e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.2418 (-13.2094 -13.2094)
R1^2/D10^2 : 3.07219E-02 (-0.0299288 -0.0299288)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.14757E-04 (-0.00011899 0.142581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.84 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 55 degrees of freedom
# Reduced chi-squared = 0.8440 for 55 degrees of freedom
# Null hypothesis probability = 7.752457e-01
# Null hypothesis probability = 7.883421e-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: -2.14582 ( 2.13942 3.96602 )
Norm@50keV : 1.55686E-04 ( -0.000162443 0.00520016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.409716e-01
Photon flux (15-150 keV) in 1.024 sec: 0.314985 7.88258E-02 ( -0.31224 0.322927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97846e-16 ( -3.73707e-08 3.76862e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.80082E-02 ( 0.112682 0.112682 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.35259E-03 ( -0.00235456 -0.00235456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8333 for 56 degrees of freedom
# Null hypothesis probability = 8.085513e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317189 9.17935E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2358e-08 ( -1.89548e-08 3.7821e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.185001 ( 0.185001 0.185001 )
beta : -2.86975E-03 ( 0.00286977 0.00286977 )
Epeak [keV] : 28.3943 ( -28.3943 -28.3943 )
Norm@50keV : 3.19772E-03 ( -0.00319774 16127.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 55 degrees of freedom
# Null hypothesis probability = 7.807197e-01
Photon flux (15-150 keV) in 1.024 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) = 3.60e-091.47e-10
S(50-100 keV) = 1.43e-082.78e-09
T90 vs. Hardness ratio plot
T90 = 1.02399998903275 sec.
Hardness ratio (energy fluence ratio) = 3.97222e+08
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -2.70611
Count Ratio (50-100 keV) / (15-25 keV) = -0.621996
Mask shadow pattern
IMX = -5.514787596199330E-01, IMY = 2.999160419952877E-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:
-35.295410 -10.496000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5528 -40.6859 4.5 48.0 -139.0 -2.0765 -2.6 8.0 Vela X-1
170.3209 -60.6221 114.3 34.4 -98.9 -0.0561 -0.1 0.2 Cen X-3
186.3449 -62.8981 0.0 34.2 -84.9 -0.4323 -0.8 11.5 GX 301-2
264.5337 -44.5130 10.9 54.6 -22.4 -1.0681 -1.1 9.7 4U 1735-44
92.5498 -32.5170 2.4 49.5 173.8 4.1960 4.9 ------ UNKNOWN
278.7797 -46.7606 2.4 51.1 -10.3 3.1132 4.7 ------ UNKNOWN
111.2835 -31.2229 2.9 53.2 -166.3 3.4702 3.9 ------ UNKNOWN
136.8905 -41.2075 2.9 47.7 -137.5 3.0625 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 1.024000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6874 -40.5913 9.3 48.1 -138.9 0.0840 1.2 7.6 Vela X-1
170.4877 -60.4969 10.1 34.6 -98.9 0.0529 1.1 9.1 Cen X-3
186.6311 -62.8582 6.3 34.3 -84.7 -0.0880 -1.8 5.3 GX 301-2
264.6619 -44.5470 16.6 54.5 -22.3 -0.0604 -0.7 6.8 4U 1735-44
355.4290 -57.1007 2.3 29.4 56.5 0.2054 5.1 ------ UNKNOWN
73.7481 -59.2571 3.1 21.3 157.4 0.0913 3.7 ------ UNKNOWN
110.1876 -54.2781 1.8 30.6 -159.8 0.1740 6.3 ------ UNKNOWN
200.7938 -67.6263 2.2 31.0 -72.1 0.1920 5.2 ------ UNKNOWN
234.7857 -50.9848 2.1 49.0 -48.1 0.6862 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Fri Oct 9 04:04:30 EDT 2015