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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.4057 -51.3430 0.0740 18.1403 -153.8429 0.0292504 2.590 TRIG_00529813
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-108.795 -8.896 (delta_t = 99.899 [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 0.512000
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 0.512000
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 0.512000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.883522 ( -1.45103 1.33614 )
Norm@50keV : 1.60445E-03 ( -0.00160293 0.00239564 )
------------------------------------------------------------
# Chi-Squared = 77.61 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.611194e-02
Photon flux (15-150 keV) in 0.512 sec: 0.332758 ( -0.332758 0.210894 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7068e-08 ( -2.7068e-08 1.3915e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.47966 ( )
Epeak [keV] : 262.711 ( -259.279 -259.279 )
Norm@50keV : 3.34693E-03 ( -0.00345286 6.28926 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 56 degrees of freedom
# Null hypothesis probability = 3.030142e-02
Photon flux (15-150 keV) in 0.512 sec: 0.340519 ( -0.340519 0.196536 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17766e-07 ( -1.17766e-07 2.0922e-06 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43024 ( -0.359819 -0.359819 )
beta : -8.84369 ( -5.14162 0.609987 )
Epeak [keV] : 279.266 ( -169.303 -279.266 )
Norm@50keV : 3.04872E-03 ( -0.00304872 745.438 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 55 degrees of freedom
# Null hypothesis probability = 2.460329e-02
Photon flux (15-150 keV) in 0.512 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] : 169.437 ( )
R^2/D10^2 : 2.40991E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 77.59 using 59 PHA bins.
# Reduced chi-squared = 1.361 for 57 degrees of freedom
# Null hypothesis probability = 3.622984e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.214e-10 5.978e-11
25- 50 1.091e-10 5.855e-16
50-150 2.530e-12 5.399e-16
15-150 3.331e-10 5.376e-12
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.998 -199.998)
Norm : 0.898179 (-0.898204 1.00315)
------------------------------------------------------------
# Chi-Squared = 85.70 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 57 degrees of freedom
# Null hypothesis probability = 8.284367e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.145e-09 1.091e-09
25- 50 2.203e-09 1.956e-09
50-150 4.831e-09 4.157e-09
15-150 8.179e-09 6.902e-09
Double BB
R1^2/D10^2 : 1.95918E-04 (-8.31706e-07 -8.31706e-07)
kT2 [keV] : 1.21793 ( )
R2^2/D10^2 : 1.37827E-05 (-3.57999e-06 -3.57999e-06)
------------------------------------------------------------
# Chi-Squared = 77.72 using 59 PHA bins.
# Chi-Squared = 77.59 using 59 PHA bins.
# Chi-Squared = 77.58 using 59 PHA bins.
# Reduced chi-squared = 1.413 for 55 degrees of freedom
# Reduced chi-squared = 1.411 for 55 degrees of freedom
# Reduced chi-squared = 1.411 for 55 degrees of freedom
# Null hypothesis probability = 2.354348e-02
# Null hypothesis probability = 2.408054e-02
# Null hypothesis probability = 2.413425e-02
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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.883522 ( -1.45103 1.33614 )
Norm@50keV : 1.60445E-03 ( -0.00160293 0.00239564 )
------------------------------------------------------------
# Chi-Squared = 77.61 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.611194e-02
Photon flux (15-150 keV) in 0.512 sec: 0.332758 ( -0.332758 0.210894 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7068e-08 ( -2.7068e-08 1.3915e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.47966 ( )
Epeak [keV] : 262.711 ( -259.279 -259.279 )
Norm@50keV : 3.34693E-03 ( -0.00345286 6.2763 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 56 degrees of freedom
# Null hypothesis probability = 3.030142e-02
Photon flux (15-150 keV) in 0.512 sec: 0.340519 ( -0.340519 0.196536 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17766e-07 ( -1.17766e-07 1.068e-06 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43024 ( -0.359819 -0.359819 )
beta : -8.84369 ( -5.14162 0.609987 )
Epeak [keV] : 279.266 ( -169.303 -279.266 )
Norm@50keV : 3.04872E-03 ( -0.00304872 745.438 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 55 degrees of freedom
# Null hypothesis probability = 2.460329e-02
Photon flux (15-150 keV) in 0.512 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] : 169.437 ( )
R^2/D10^2 : 2.40991E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 77.59 using 59 PHA bins.
# Reduced chi-squared = 1.361 for 57 degrees of freedom
# Null hypothesis probability = 3.622984e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.214e-10 5.563e-11
25- 50 1.091e-10 1.744e-10
50-150 2.530e-12 4.611e-17
15-150 3.331e-10 2.112e-12
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.998 -199.998)
Norm : 0.898179 (-0.898204 1.00315)
------------------------------------------------------------
# Chi-Squared = 85.70 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 57 degrees of freedom
# Null hypothesis probability = 8.284367e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.145e-09 1.123e-09
25- 50 2.203e-09 1.916e-09
50-150 4.831e-09 4.040e-09
15-150 8.179e-09 7.383e-09
Double BB
R1^2/D10^2 : 1.95918E-04 (-8.31706e-07 -8.31706e-07)
kT2 [keV] : 1.21793 ( )
R2^2/D10^2 : 1.37827E-05 (-3.57999e-06 -3.57999e-06)
------------------------------------------------------------
# Chi-Squared = 77.72 using 59 PHA bins.
# Chi-Squared = 77.59 using 59 PHA bins.
# Chi-Squared = 77.58 using 59 PHA bins.
# Reduced chi-squared = 1.413 for 55 degrees of freedom
# Reduced chi-squared = 1.411 for 55 degrees of freedom
# Reduced chi-squared = 1.411 for 55 degrees of freedom
# Null hypothesis probability = 2.354348e-02
# Null hypothesis probability = 2.408054e-02
# Null hypothesis probability = 2.413425e-02
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: -0.883522 ( -1.45103 1.33614 )
Norm@50keV : 1.60445E-03 ( -0.00160293 0.00239564 )
------------------------------------------------------------
# Chi-Squared = 77.61 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.611194e-02
Photon flux (15-150 keV) in 0.512 sec: 0.332758 ( -0.332758 0.210894 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.7068e-08 ( -2.7068e-08 1.3915e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.47966 ( )
Epeak [keV] : 262.711 ( -259.279 -259.279 )
Norm@50keV : 3.34693E-03 ( -0.00345286 6.72271 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.383 for 56 degrees of freedom
# Null hypothesis probability = 3.030142e-02
Photon flux (15-150 keV) in 0.512 sec: 0.340519 ( -0.340519 0.196536 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17766e-07 ( -1.17766e-07 2.54729e-06 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.43024 ( -0.359819 -0.359819 )
beta : -8.84369 ( -5.14162 0.609987 )
Epeak [keV] : 279.266 ( -169.303 -279.266 )
Norm@50keV : 3.04872E-03 ( -0.00304872 745.438 )
------------------------------------------------------------
# Chi-Squared = 77.47 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 55 degrees of freedom
# Null hypothesis probability = 2.460329e-02
Photon flux (15-150 keV) in 0.512 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) = 9.84847e-10
S(50-100 keV) = 7.27496e-09
T90 vs. Hardness ratio plot
T90 = 0.51199996471405 sec.
Hardness ratio (energy fluence ratio) = 7.38689
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -0.916153
Count Ratio (50-100 keV) / (15-25 keV) = 4.30364
Mask shadow pattern
IMX = -2.940763928484095E-01, IMY = 1.444299840819258E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-108.795410 -8.896000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.8172 -62.7754 12.5 50.1 -142.2 1.0373 0.9 4.4 GX 301-2
245.0054 -15.6642 1.2 21.8 -26.7 3.2526 9.7 2.1 Sco X-1
255.8973 -37.7920 5.2 2.8 -169.2 0.7231 2.2 5.3 4U 1700-377
256.2373 -36.2834 0.0 1.3 -172.9 0.4298 1.4 12.7 GX 349+2
262.8326 -24.6636 17.3 11.8 34.1 -0.2020 -0.7 10.8 GX 1+4
264.5481 -44.5182 10.5 11.4 152.8 -0.3381 -1.1 9.3 4U 1735-44
268.4873 -1.4011 32.4 35.5 25.1 0.1578 0.4 7.8 SW J1753.5-0127
270.4117 -25.2072 17.9 15.6 58.8 -0.2031 -0.6 10.3 GX 5-1
270.4201 -25.7242 11.5 15.3 60.2 0.3785 1.2 6.5 GRS 1758-258
274.1356 -14.1040 3.9 26.3 45.8 1.1477 3.0 8.6 GX 17+2
275.9860 -30.5016 7.6 17.1 84.1 0.5696 1.5 8.7 H1820-303
285.2433 -25.0028 0.0 26.8 79.9 -0.4368 -0.9 12.3 HT1900.1-2455
262.8453 -33.9973 463.3 5.5 85.1 -0.0072 -0.0 12.1 GX 354-0
297.1685 -27.2185 2.9 35.6 92.7 3.1681 4.0 ------ UNKNOWN
257.4557 20.2381 1.9 55.2 5.1 8.0640 6.0 ------ UNKNOWN
249.4148 9.3442 3.3 44.8 -5.9 1.7877 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.512000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.8009 -62.6081 113.8 50.1 -142.0 0.0038 0.1 10.5 GX 301-2
245.1289 -15.5944 44.4 21.8 -26.4 0.0030 0.3 9.1 Sco X-1
255.9826 -37.9946 4.7 3.0 -171.0 0.0277 2.5 9.0 4U 1700-377
256.6214 -36.4141 3.9 1.4 174.4 -0.0335 -3.0 9.0 GX 349+2
263.0805 -24.8869 5.7 11.7 35.6 -0.0216 -2.0 9.3 GX 1+4
264.9235 -44.5269 5.7 11.6 151.8 0.0234 2.0 9.0 4U 1735-44
268.3732 -1.3065 18.6 35.5 24.9 0.0109 0.6 8.8 SW J1753.5-0127
270.1554 -25.2477 0.0 15.4 58.3 -0.0253 -2.2 12.3 GX 5-1
270.3623 -25.8818 3.7 15.1 60.6 0.0350 3.1 8.9 GRS 1758-258
274.0171 -13.9274 4.0 26.4 45.3 -0.0428 -2.9 6.6 GX 17+2
275.7210 -30.2865 5.2 17.0 83.1 -0.0276 -2.2 11.6 H1820-303
285.2313 -24.9721 6.7 26.8 79.8 -0.0289 -1.7 11.1 HT1900.1-2455
263.1342 -33.8924 4.6 5.7 84.6 0.0292 2.5 8.0 GX 354-0
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Mon Aug 6 10:37:50 EDT 2012