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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.6066 -26.3128 0.0409 7.8 56.7 1.0560 4.7 TRIG_00528432
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70647 ( -0.710716 0.981261 )
Norm@50keV : 8.50965E-05 ( -5.20368e-05 5.7085e-05 )
------------------------------------------------------------
# Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.345950e-01
Photon flux (15-150 keV) in 320 sec: 1.90740E-02 ( -0.0064527 0.00647292 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90343e-07 ( -1.19624e-07 1.38603e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.840555 ( )
Epeak [keV] : 18.7821 ( )
Norm@50keV : 1.64850E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196800e-01
Photon flux (15-150 keV) in 320 sec: 1.82406E-02 ( -0.0060461 0.0060461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41601e-07 ( -9.2473e-08 2.72572e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620803 ( 1.78984 1.78984 )
beta : -10.00000 ( 4.34018e+08 4.34018e+08 )
Epeak [keV] : 19.7731 ( -18.3212 16.9269 )
Norm@50keV : 2.38457E-03 ( -0.00422722 12.4864 )
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 55 degrees of freedom
# Null hypothesis probability = 5.829959e-01
Photon flux (15-150 keV) in 320 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] : 6.14522 (-1.77425 2.46172)
R^2/D10^2 : 6.40901E-02 (-0.06409 0.22877)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9163 for 57 degrees of freedom
# Null hypothesis probability = 6.542503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-07 6.422e-08
25- 50 1.117e-07 7.314e-08
50-150 1.128e-08 9.974e-09
15-150 2.294e-07 1.435e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4619 (-12.3408 36.4759)
Norm : 0.194586 (-0.10815 0.304539)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9164 for 57 degrees of freedom
# Null hypothesis probability = 6.541498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.093e-07 6.637e-08
25- 50 1.074e-07 6.834e-08
50-150 4.153e-08 3.672e-08
15-150 2.582e-07 1.710e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 22.7204 ( )
R1^2/D10^2 : 8.36464E-05 (-0.000101915 -0.000101915)
kT2 [keV] : 5.72498 (-5.70923 2.70413)
R2^2/D10^2 : 8.25134E-02 (-0.0820042 -0.0820042)
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Chi-Squared = 51.93 using 59 PHA bins.
# Reduced chi-squared = 0.9486 for 55 degrees of freedom
# Reduced chi-squared = 0.9442 for 55 degrees of freedom
# Null hypothesis probability = 5.832311e-01
# Null hypothesis probability = 5.927012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 1.699e-07
25- 50 1.100e-07 2.037e-07
50-150 2.434e-08 8.210e-08
15-150 2.426e-07 4.237e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70647 ( -0.710716 0.981261 )
Norm@50keV : 8.50965E-05 ( -5.20368e-05 5.7085e-05 )
------------------------------------------------------------
# Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.345950e-01
Photon flux (15-150 keV) in 320 sec: 1.90740E-02 ( -0.0064527 0.00647292 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90343e-07 ( -1.19624e-07 1.38603e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.840555 ( )
Epeak [keV] : 18.7821 ( )
Norm@50keV : 1.64850E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196800e-01
Photon flux (15-150 keV) in 320 sec: 1.82406E-02 ( -0.0060461 0.0060461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41601e-07 ( -9.2473e-08 2.72572e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620803 ( 1.78984 1.78984 )
beta : -10.00000 ( 4.34018e+08 4.34018e+08 )
Epeak [keV] : 19.7731 ( -18.3297 16.927 )
Norm@50keV : 2.38457E-03 ( -0.00422722 12.4844 )
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 55 degrees of freedom
# Null hypothesis probability = 5.829959e-01
Photon flux (15-150 keV) in 320 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] : 6.14522 (-1.77425 2.46172)
R^2/D10^2 : 6.40901E-02 (-0.06409 0.22877)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9163 for 57 degrees of freedom
# Null hypothesis probability = 6.542503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-07 6.370e-08
25- 50 1.117e-07 7.072e-08
50-150 1.128e-08 9.947e-09
15-150 2.294e-07 1.403e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4619 (-12.3408 36.4759)
Norm : 0.194586 (-0.10815 0.304539)
------------------------------------------------------------
# Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9164 for 57 degrees of freedom
# Null hypothesis probability = 6.541498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.093e-07 6.594e-08
25- 50 1.074e-07 6.779e-08
50-150 4.153e-08 3.867e-08
15-150 2.582e-07 1.611e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 22.7204 ( )
R1^2/D10^2 : 8.36464E-05 (-0.000101915 -0.000101915)
kT2 [keV] : 5.72498 (-5.70923 2.70413)
R2^2/D10^2 : 8.25134E-02 (-0.0820042 -0.0820042)
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Chi-Squared = 51.93 using 59 PHA bins.
# Reduced chi-squared = 0.9486 for 55 degrees of freedom
# Reduced chi-squared = 0.9442 for 55 degrees of freedom
# Null hypothesis probability = 5.832311e-01
# Null hypothesis probability = 5.927012e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-07 1.458e-07
25- 50 1.100e-07 2.672e-07
50-150 2.434e-08 8.224e-08
15-150 2.426e-07 4.946e-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: 2.70647 ( -0.710716 0.981261 )
Norm@50keV : 8.50965E-05 ( -5.20368e-05 5.7085e-05 )
------------------------------------------------------------
# Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9257 for 57 degrees of freedom
# Null hypothesis probability = 6.345950e-01
Photon flux (15-150 keV) in 320 sec: 1.90740E-02 ( -0.0064527 0.00647292 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90343e-07 ( -1.19624e-07 1.38603e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.840555 ( )
Epeak [keV] : 18.7821 ( )
Norm@50keV : 1.64850E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196800e-01
Photon flux (15-150 keV) in 320 sec: 1.82406E-02 ( -0.0060461 0.0060461 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41601e-07 ( -9.2473e-08 2.72572e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620803 ( 1.78984 1.78984 )
beta : -10.00000 ( 4.34018e+08 4.34018e+08 )
Epeak [keV] : 19.7731 ( -18.6088 16.9277 )
Norm@50keV : 2.38457E-03 ( -0.00422722 12.4825 )
------------------------------------------------------------
# Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9488 for 55 degrees of freedom
# Null hypothesis probability = 5.829959e-01
Photon flux (15-150 keV) in 320 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) = 9.75338e-08
S(50-100 keV) = 5.97725e-08
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.612839
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.951965
Count Ratio (50-100 keV) / (15-25 keV) = 0.228888
Mask shadow pattern
IMX = 7.514861606052506E-02, IMY = -1.145876774341304E-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 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9721 -15.6509 0.2 24.3 -25.7 14.3502 60.3 0.8 Sco X-1
255.9843 -37.8595 3.4 8.1 -106.2 0.7648 3.4 0.9 4U 1700-377
256.4744 -36.5698 8.0 7.1 -99.5 0.3494 1.4 9.0 GX 349+2
263.1614 -24.6912 4.5 8.3 19.2 0.5965 2.6 8.9 GX 1+4
264.7156 -44.5129 13.1 11.6 -159.5 0.2348 0.9 4.0 4U 1735-44
268.3809 -1.4428 4.1 31.8 32.2 0.9592 2.8 1.0 SW J1753.5-0127
270.4838 -25.1551 11.6 9.7 61.9 -0.2527 -1.0 11.8 GX 5-1
270.3243 -25.8559 4.2 9.0 63.7 0.6970 2.8 6.9 GRS 1758-258
274.0348 -14.0076 3.6 21.1 52.0 0.8540 3.2 2.4 GX 17+2
275.8191 -30.3532 2.8 10.5 102.5 1.0056 4.1 5.5 H1820-303
284.9853 -25.1224 0.0 20.0 96.1 -0.3484 -1.2 12.4 HT1900.1-2455
262.8919 -33.7061 6.0 1.1 -110.8 0.4820 1.9 9.1 GX 354-0
318.9686 -68.7062 2.6 47.1 179.5 2.3090 4.5 ------ UNKNOWN
27.6846 -87.0114 2.8 58.8 -159.4 7.7476 4.1 ------ UNKNOWN
215.8706 -21.5450 2.9 43.8 -64.0 5.4566 4.0 ------ UNKNOWN
204.4705 -66.4269 3.3 48.0 -128.9 4.4733 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
380.700600 963.071900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9718 -15.6430 0.3 24.5 -64.8 16.8128 36.4 0.5 Sco X-1
255.9963 -37.8513 0.6 15.7 -136.3 7.1846 20.1 0.6 4U 1700-377
256.5166 -36.4098 4.0 14.4 -133.3 1.0517 2.9 4.0 GX 349+2
262.9773 -24.8229 5.0 5.3 -70.8 0.8889 2.3 5.0 GX 1+4
264.9267 -44.3503 7.6 18.3 -167.5 0.5354 1.5 9.9 4U 1735-44
268.3566 -1.3490 10.0 25.0 3.4 0.4446 1.2 6.3 SW J1753.5-0127
270.1056 -24.9420 0.0 1.9 48.5 -0.0261 -0.1 12.7 GX 5-1
270.3464 -25.6264 4.3 1.7 70.3 1.0062 2.7 7.4 GRS 1758-258
273.9745 -14.1129 2.0 13.2 27.4 2.0615 5.8 4.9 GX 17+2
276.0829 -30.2549 3.4 7.7 126.7 1.2175 3.4 10.6 H1820-303
284.9044 -25.0920 0.0 14.7 92.8 -0.2449 -0.6 12.5 HT1900.1-2455
288.7828 10.9474 1.1 42.1 34.3 7.7445 10.2 0.9 GRS 1915+105
263.0690 -33.8194 2.8 8.9 -144.7 1.4068 4.1 4.1 GX 354-0
292.9405 13.1081 2.6 46.0 37.9 5.2672 4.5 ------ UNKNOWN
282.1262 -30.4197 2.7 12.6 116.2 1.5244 4.3 ------ UNKNOWN
277.3491 -23.8003 2.1 8.3 78.2 1.8223 5.4 ------ UNKNOWN
299.3536 -78.7870 3.9 54.2 177.0 4.5567 3.0 ------ UNKNOWN
256.1160 -15.9493 3.7 15.6 -46.7 1.1230 3.2 ------ UNKNOWN
232.3744 10.0738 3.7 50.6 -44.8 6.2599 3.1 ------ UNKNOWN
213.3686 -48.7447 2.4 47.9 -129.1 8.3325 4.8 ------ UNKNOWN
218.8171 -37.1448 2.3 43.2 -113.2 8.5282 5.0 ------ UNKNOWN
Plot creation:
Tue Jul 24 21:47:56 EDT 2012