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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.3078 -29.2696 0.0282 13.2 38.7 0.2081 6.8 TRIG_00502024
------------------------------------------
Foreground time interval of the image:
1.360 11.344 (delta_t = 9.984 [sec])
Background time interval of the image:
-239.664 1.360 (delta_t = 241.024 [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 8.192000
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 8.192000
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 8.192000
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 1.360 sec. to 11.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.91892 ( -1.16829 1.4355 )
Norm@50keV : 4.61085E-05 ( -4.61085e-05 0.000108884 )
------------------------------------------------------------
# Chi-Squared = 40.30 using 59 PHA bins.
# Reduced chi-squared = 0.7071 for 57 degrees of freedom
# Null hypothesis probability = 9.540214e-01
Photon flux (15-150 keV) in 9.984 sec: 0.174932 ( -0.0402663 0.0404121 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2672e-08 ( -1.35436e-08 1.45423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.360 sec. to 11.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.24958E-03 ( )
------------------------------------------------------------
# Chi-Squared = 83.82 using 59 PHA bins.
# Reduced chi-squared = 1.497 for 56 degrees of freedom
# Null hypothesis probability = 9.417238e-03
Photon flux (15-150 keV) in 9.984 sec: 0.178931 ( -0.039454 0.038592 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.12186e-08 ( -1.16875e-08 1.16906e-08 ) ergs/cm2
Band function
Time interval is from 1.360 sec. to 11.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.80552 ( 6.64101 6.64101 )
beta : -5.91780 ( -2.0564 0.546047 )
Epeak [keV] : 1.41873 ( -1.41873 -1.41873 )
Norm@50keV : 6.27440E-03 ( -0.0062744 0.0147928 )
------------------------------------------------------------
# Chi-Squared = 40.30 using 59 PHA bins.
# Reduced chi-squared = 0.7328 for 55 degrees of freedom
# Null hypothesis probability = 9.312054e-01
Photon flux (15-150 keV) in 9.984 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] : 2.32167 (-0.445535 0.537602)
R^2/D10^2 : 154.521 (-154.521 690.229)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.42 using 59 PHA bins.
# Reduced chi-squared = 0.6916 for 57 degrees of freedom
# Null hypothesis probability = 9.633015e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.858e-08 2.626e-08
25- 50 2.622e-09 1.618e-09
50-150 3.900e-13 4.882e-13
15-150 5.120e-08 2.829e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.08914 (-1.13439 1.68702)
Norm : 89.9197 (-89.9194 315.439)
------------------------------------------------------------
# Chi-Squared = 39.69 using 59 PHA bins.
# Reduced chi-squared = 0.6962 for 57 degrees of freedom
# Null hypothesis probability = 9.606926e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.754e-08 2.645e-08
25- 50 3.673e-09 2.304e-09
50-150 6.207e-12 7.213e-12
15-150 5.122e-08 2.876e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.25942 (-0.446337 0.522912)
R1^2/D10^2 : 185.591 (-185.788 918.391)
kT2 [keV] : 24.8262 (-25.2746 -25.2746)
R2^2/D10^2 : 7.59374E-04 (-0.000741382 0.0255029)
------------------------------------------------------------
# Chi-Squared = 37.20 using 59 PHA bins.
# Reduced chi-squared = 0.6764 for 55 degrees of freedom
# Null hypothesis probability = 9.685071e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.797e-08 2.548e-08
25- 50 6.867e-09 3.944e-09
50-150 2.107e-08 1.982e-08
15-150 7.591e-08 3.940e-08
Peak spectrum fit
Power-law model
Time interval is from 5.628 sec. to 6.628 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.13648 ( -0.647019 0.879846 )
Norm@50keV : 1.48766E-03 ( -0.000869877 0.00103485 )
------------------------------------------------------------
# Chi-Squared = 42.34 using 59 PHA bins.
# Reduced chi-squared = 0.7428 for 57 degrees of freedom
# Null hypothesis probability = 9.262715e-01
Photon flux (15-150 keV) in 1 sec: 0.452602 ( -0.122265 0.122725 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9092e-08 ( -6.36157e-09 7.18864e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.628 sec. to 6.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88544 ( )
Epeak [keV] : 2.78649 ( )
Norm@50keV : 1.09667E-02 ( )
------------------------------------------------------------
# Chi-Squared = 41.96 using 59 PHA bins.
# Reduced chi-squared = 0.7493 for 56 degrees of freedom
# Null hypothesis probability = 9.181704e-01
Photon flux (15-150 keV) in 1 sec: 0.450370 ( -0.119147 0.120833 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81615e-08 ( -5.8725e-09 7.4906e-09 ) ergs/cm2
Band function
Time interval is from 5.628 sec. to 6.628 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.96672 ( 1.90482 1.90482 )
beta : -9.37167 ( 9.99999 20 )
Epeak [keV] : 0.863692 ( -0.863692 20.8198 )
Norm@50keV : 9.68078E-03 ( -0.00507634 0.0119554 )
------------------------------------------------------------
# Chi-Squared = 41.94 using 59 PHA bins.
# Reduced chi-squared = 0.7626 for 55 degrees of freedom
# Null hypothesis probability = 9.023316e-01
Photon flux (15-150 keV) in 1 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] : 4.92257 (-1.55712 2.33111)
R^2/D10^2 : 4.03321 (-4.08019 23.4866)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 44.59 using 59 PHA bins.
# Reduced chi-squared = 0.7823 for 57 degrees of freedom
# Null hypothesis probability = 8.840900e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.211e-09 5.395e-09
25- 50 5.787e-09 3.629e-09
50-150 2.181e-10 2.182e-10
15-150 1.522e-08 9.280e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.2942 (-8.10116 15.4771)
Norm : 6.64006 (-3.48498 10.7681)
------------------------------------------------------------
# Chi-Squared = 42.16 using 59 PHA bins.
# Reduced chi-squared = 0.7396 for 57 degrees of freedom
# Null hypothesis probability = 9.291402e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.005e-09 4.199e-09
25- 50 7.000e-09 4.106e-09
50-150 1.623e-09 1.491e-09
15-150 1.763e-08 8.247e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.94439 (-1.48921 2.05075)
R1^2/D10^2 : 38.5799 (-33.7312 3827.87)
kT2 [keV] : 9.41095 (-4.2895 9.79204)
R2^2/D10^2 : 0.150413 (-0.141115 2.20738)
------------------------------------------------------------
# Chi-Squared = 40.94 using 59 PHA bins.
# Reduced chi-squared = 0.7443 for 55 degrees of freedom
# Null hypothesis probability = 9.208374e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.065e-09 4.703e-09
25- 50 6.906e-09 3.865e-09
50-150 2.634e-09 2.186e-09
15-150 1.860e-08 9.810e-09
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: 5.91892 ( -1.16829 1.4355 )
Norm@50keV : 4.61085E-05 ( -4.61085e-05 0.000108884 )
------------------------------------------------------------
# Chi-Squared = 40.30 using 59 PHA bins.
# Reduced chi-squared = 0.7071 for 57 degrees of freedom
# Null hypothesis probability = 9.540214e-01
Photon flux (15-150 keV) in 9.984 sec: 0.174932 ( -0.0402663 0.0404121 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2672e-08 ( -1.35436e-08 1.45423e-08 ) 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 : 2.24958E-03 ( )
------------------------------------------------------------
# Chi-Squared = 83.82 using 59 PHA bins.
# Reduced chi-squared = 1.497 for 56 degrees of freedom
# Null hypothesis probability = 9.417238e-03
Photon flux (15-150 keV) in 9.984 sec: 0.178931 ( -0.039454 0.038592 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.12186e-08 ( -1.16875e-08 1.16906e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.80552 ( 6.64101 6.64101 )
beta : -5.91780 ( -2.0564 0.546047 )
Epeak [keV] : 1.41873 ( -1.41873 -1.41873 )
Norm@50keV : 6.27440E-03 ( -0.0062744 0.0147928 )
------------------------------------------------------------
# Chi-Squared = 40.30 using 59 PHA bins.
# Reduced chi-squared = 0.7328 for 55 degrees of freedom
# Null hypothesis probability = 9.312054e-01
Photon flux (15-150 keV) in 9.984 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) = 6.64523e-09
S(50-100 keV) = 4.39372e-10
T90 vs. Hardness ratio plot
T90 = 8.57600003480911 sec.
Hardness ratio (energy fluence ratio) = 0.0661184
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.0651886
Count Ratio (50-100 keV) / (15-25 keV) = 0.154286
Mask shadow pattern
IMX = 1.827405979074499E-01, IMY = -1.463985929230912E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-239.664000 1.360000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6909 -62.7987 10.5 46.4 -142.1 0.5284 1.1 1.9 GX 301-2
244.9803 -15.6415 0.3 26.7 -25.6 7.8575 40.2 0.1 Sco X-1
255.7953 -37.6957 0.0 2.7 -23.1 -0.0360 -0.2 12.7 4U 1700-377
256.3861 -36.4318 3.6 3.7 -8.5 0.6072 3.2 2.4 GX 349+2
263.1622 -24.6784 4.2 16.2 21.1 0.5070 2.7 9.3 GX 1+4
264.5127 -44.3186 0.0 6.9 131.5 0.3965 2.4 12.6 4U 1735-44
268.2242 -1.3322 3.0 40.1 18.7 1.2125 3.9 11.3 SW J1753.5-0127
270.2727 -25.0772 2.9 18.6 41.3 0.8300 4.0 0.6 GX 5-1
270.1475 -25.7395 6.6 18.0 42.2 0.3668 1.7 8.4 GRS 1758-258
274.0710 -14.0399 3.2 30.0 35.7 0.9419 3.6 3.8 GX 17+2
276.1183 -30.4250 5.3 18.2 65.0 0.4709 2.2 10.6 H1820-303
285.0152 -24.8175 6.1 27.8 66.5 0.5039 1.9 6.3 HT1900.1-2455
292.1195 -16.0750 2.2 38.7 63.1 3.0675 5.2 ------ UNKNOWN
213.0405 -68.2796 2.7 36.7 -153.1 1.0695 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
1.360000 11.344000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.7326 -62.7592 7.5 46.4 -142.1 -0.1120 -1.5 2.2 GX 301-2
245.0481 -15.7899 7.2 26.5 -25.6 -0.0525 -1.6 9.8 Sco X-1
255.9254 -37.6947 11.6 2.6 -21.0 -0.0299 -1.0 9.4 4U 1700-377
256.2470 -36.2753 0.0 3.9 -9.8 0.0464 1.6 12.7 GX 349+2
262.8496 -24.7531 10.0 16.1 20.2 0.0355 1.2 8.7 GX 1+4
264.6598 -44.4105 4.0 7.0 131.6 0.0872 2.8 4.3 4U 1735-44
268.3920 -1.4060 10.8 40.0 18.9 -0.0570 -1.1 3.1 SW J1753.5-0127
270.4155 -24.9169 0.0 18.8 41.4 -0.0296 -0.9 12.1 GX 5-1
270.2327 -25.8387 9.0 18.0 42.6 -0.0414 -1.3 6.9 GRS 1758-258
273.8301 -13.9084 0.0 30.0 35.1 0.0537 1.2 12.8 GX 17+2
276.0552 -30.2401 7.2 18.3 64.5 -0.0579 -1.6 10.2 H1820-303
285.0280 -24.9673 4.9 27.8 66.8 -0.1088 -2.4 2.8 HT1900.1-2455
266.3080 -29.2696 1.7 13.2 38.7 0.2081 6.8 ------ UNKNOWN
220.8548 -27.9698 2.6 32.2 -77.8 0.2158 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
802.536590 926.696000
927.336000 962.390600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
307.2344 -52.9085 2.1 37.2 24.2 1.2075 5.6 ------ UNKNOWN
239.3551 -66.5119 2.8 56.4 -16.7 2.2880 4.1 ------ UNKNOWN
Plot creation:
Thu Sep 1 21:24:08 EDT 2011