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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
281.3068 -4.6021 0.0393 39.4 -136.2 2.2969 4.9 TRIG_00521567
------------------------------------------
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)
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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46950 ( -0.484607 0.579727 )
Norm@50keV : 3.04725E-04 ( -0.000119409 0.000118386 )
------------------------------------------------------------
# Chi-Squared = 74.54 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 57 degrees of freedom
# Null hypothesis probability = 5.933700e-02
Photon flux (15-150 keV) in 320 sec: 5.87613E-02 ( -0.0151198 0.0151258 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.67296e-07 ( -2.86668e-07 3.04271e-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: 0.633556 ( -6.68834 1.39496 )
Epeak [keV] : 25.1207 ( )
Norm@50keV : 4.79347E-03 ( )
------------------------------------------------------------
# Chi-Squared = 72.98 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 56 degrees of freedom
# Null hypothesis probability = 6.328327e-02
Photon flux (15-150 keV) in 320 sec: 5.57692E-02 ( -0.0152674 0.0155223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13366e-07 ( -2.4775e-07 6.24442e-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 : 4.79519 ( -11.2894 -11.2894 )
beta : -3.10370 ( 3.10354 0.836705 )
Epeak [keV] : 24.5651 ( -24.5651 6.74667 )
Norm@50keV : 62.2674 ( -62.265 17.7198 )
------------------------------------------------------------
# Chi-Squared = 72.46 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.738776e-02
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] : 7.25393 (-1.64623 2.1382)
R^2/D10^2 : 9.82043E-02 (-0.0654481 0.195997)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.30 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 57 degrees of freedom
# Null hypothesis probability = 7.178874e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.752e-07 1.474e-07
25- 50 4.035e-07 2.496e-07
50-150 7.593e-08 5.549e-08
15-150 7.547e-07 4.265e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.5896 (-13.468 30.5195)
Norm : 0.457196 (-0.19249 0.364308)
------------------------------------------------------------
# Chi-Squared = 73.24 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 57 degrees of freedom
# Null hypothesis probability = 7.249715e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.054e-07 1.124e-07
25- 50 3.589e-07 1.511e-07
50-150 2.101e-07 1.586e-07
15-150 8.744e-07 3.600e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.46731 (-6.47137 2.54163)
R1^2/D10^2 : 0.143203 (-0.143027 -0.143027)
kT2 [keV] : 21.8957 (-21.9901 -21.9901)
R2^2/D10^2 : 3.37025E-04 (-0.00033213 0.245861)
------------------------------------------------------------
# Chi-Squared = 72.52 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 55 degrees of freedom
# Null hypothesis probability = 5.675426e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.911e-07 1.699e-07
25- 50 3.796e-07 2.317e-07
50-150 2.217e-07 1.217e-07
15-150 8.924e-07 4.789e-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: 2.46950 ( -0.484607 0.579727 )
Norm@50keV : 3.04725E-04 ( -0.000119409 0.000118386 )
------------------------------------------------------------
# Chi-Squared = 74.54 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 57 degrees of freedom
# Null hypothesis probability = 5.933700e-02
Photon flux (15-150 keV) in 320 sec: 5.87613E-02 ( -0.0151198 0.0151258 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.67296e-07 ( -2.86668e-07 3.04271e-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: 0.633556 ( -6.68834 1.39496 )
Epeak [keV] : 25.1207 ( )
Norm@50keV : 4.79347E-03 ( )
------------------------------------------------------------
# Chi-Squared = 72.98 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 56 degrees of freedom
# Null hypothesis probability = 6.328327e-02
Photon flux (15-150 keV) in 320 sec: 5.57692E-02 ( -0.0152674 0.0155223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13366e-07 ( -2.4775e-07 6.24442e-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 : 4.79519 ( -11.2894 -11.2894 )
beta : -3.10370 ( 3.10354 0.836705 )
Epeak [keV] : 24.5651 ( -24.5651 6.74667 )
Norm@50keV : 62.2674 ( -62.265 17.7198 )
------------------------------------------------------------
# Chi-Squared = 72.46 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.738776e-02
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] : 7.25393 (-1.64623 2.1382)
R^2/D10^2 : 9.82043E-02 (-0.0654481 0.195997)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 73.30 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 57 degrees of freedom
# Null hypothesis probability = 7.178874e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.752e-07 1.669e-07
25- 50 4.035e-07 2.504e-07
50-150 7.593e-08 5.671e-08
15-150 7.547e-07 4.215e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.5896 (-13.468 30.5195)
Norm : 0.457196 (-0.19249 0.364308)
------------------------------------------------------------
# Chi-Squared = 73.24 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 57 degrees of freedom
# Null hypothesis probability = 7.249715e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.054e-07 1.208e-07
25- 50 3.589e-07 1.742e-07
50-150 2.101e-07 1.589e-07
15-150 8.744e-07 3.901e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.46731 (-6.47137 2.54163)
R1^2/D10^2 : 0.143203 (-0.143027 -0.143027)
kT2 [keV] : 21.8957 (-21.9901 -21.9901)
R2^2/D10^2 : 3.37025E-04 (-0.00033213 0.245861)
------------------------------------------------------------
# Chi-Squared = 72.52 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 55 degrees of freedom
# Null hypothesis probability = 5.675426e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.911e-07 1.742e-07
25- 50 3.796e-07 2.450e-07
50-150 2.217e-07 1.365e-07
15-150 8.924e-07 5.136e-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: 2.46950 ( -0.484607 0.579727 )
Norm@50keV : 3.04725E-04 ( -0.000119409 0.000118386 )
------------------------------------------------------------
# Chi-Squared = 74.54 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 57 degrees of freedom
# Null hypothesis probability = 5.933700e-02
Photon flux (15-150 keV) in 320 sec: 5.87613E-02 ( -0.0151198 0.0151258 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.67296e-07 ( -2.86668e-07 3.04271e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.633556 ( -6.68834 1.39496 )
Epeak [keV] : 25.1207 ( )
Norm@50keV : 4.79347E-03 ( )
------------------------------------------------------------
# Chi-Squared = 72.98 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 56 degrees of freedom
# Null hypothesis probability = 6.328327e-02
Photon flux (15-150 keV) in 320 sec: 5.57692E-02 ( -0.0152674 0.0155223 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.13366e-07 ( -2.4775e-07 6.24442e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.79519 ( -11.2894 -11.2894 )
beta : -3.10370 ( 3.10354 0.836705 )
Epeak [keV] : 24.5651 ( -24.5651 6.74667 )
Norm@50keV : 62.2674 ( -62.265 17.7198 )
------------------------------------------------------------
# Chi-Squared = 72.46 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 55 degrees of freedom
# Null hypothesis probability = 5.738776e-02
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) = 3.19938e-07
S(50-100 keV) = 2.31066e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.722221
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.8601
Count Ratio (50-100 keV) / (15-25 keV) = 0.217361
Mask shadow pattern
IMX = -5.937398463451443E-01, IMY = 5.686841248907251E-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] [']
186.4637 -62.7932 3.4 53.3 11.1 4.1323 3.5 5.5 GX 301-2
244.9712 -15.6409 0.2 10.9 151.4 12.7290 46.8 0.5 Sco X-1
255.9888 -37.8518 0.9 13.8 -50.2 3.1831 12.6 0.5 4U 1700-377
256.4118 -36.4857 4.3 12.9 -55.0 0.6934 2.7 3.9 GX 349+2
263.1392 -24.9205 0.0 14.7 -110.9 0.2803 1.0 12.7 GX 1+4
264.9134 -44.4187 6.1 23.1 -52.9 0.5799 1.9 7.5 4U 1735-44
268.2614 -1.2968 5.6 32.4 -155.9 0.6731 2.1 11.3 SW J1753.5-0127
270.1877 -25.1015 3.9 21.0 -107.1 0.9096 3.0 5.4 GX 5-1
270.2668 -25.7645 5.4 20.9 -105.2 0.6935 2.2 2.3 GRS 1758-258
273.8597 -14.0149 43.8 28.1 -129.6 -0.0900 -0.3 8.6 GX 17+2
275.9249 -30.3698 5.3 25.8 -93.0 0.8277 2.2 0.2 H1820-303
284.9911 -25.0143 5.7 34.2 -102.4 1.1003 2.0 6.1 HT1900.1-2455
288.9186 10.8167 10.3 55.2 -145.5 2.1620 1.1 10.5 GRS 1915+105
263.1987 -33.7230 10.8 15.8 -77.3 0.2925 1.1 12.4 GX 354-0
218.3081 -4.9235 3.0 34.8 104.5 2.5602 3.9 ------ UNKNOWN
247.2042 9.6119 2.6 36.0 161.8 1.8332 4.4 ------ UNKNOWN
258.7788 29.3030 3.5 56.9 173.7 6.0342 3.3 ------ UNKNOWN
241.1643 -47.3195 5.8 21.4 -7.9 0.5121 2.0 ------ UNKNOWN
248.5200 -47.3863 0.6 21.0 -21.7 4.8517 18.7 ------ UNKNOWN
283.0949 6.3659 2.3 48.0 -146.5 3.2552 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
408.700600 411.980000
413.000000 963.080400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9823 -15.6433 0.8 37.3 86.6 19.7573 14.4 0.2 Sco X-1
254.5551 35.4368 5.8 47.2 166.6 2.0608 2.0 7.4 Her X-1
256.0552 -37.8613 1.8 40.4 47.7 6.2773 6.5 3.4 4U 1700-377
256.6526 -36.5546 0.0 39.1 48.5 1.3913 1.6 13.1 GX 349+2
262.8894 -24.9029 0.0 26.9 55.7 1.2157 2.2 11.5 GX 1+4
264.5532 -44.4345 47.7 42.4 34.2 0.2009 0.2 8.2 4U 1735-44
268.3166 -1.5026 2.4 13.3 119.6 1.7448 4.8 4.3 SW J1753.5-0127
270.2088 -25.1339 5.4 23.1 42.7 1.0111 2.1 5.3 GX 5-1
270.3381 -25.8122 3.4 23.6 41.7 1.6528 3.4 4.6 GRS 1758-258
273.9707 -14.0306 1.8 11.8 53.3 2.3540 6.4 2.1 GX 17+2
275.7499 -30.3094 12.7 26.2 27.3 0.4078 0.9 9.7 H1820-303
285.1331 -24.7366 0.0 20.5 6.4 0.4326 1.2 12.2 HT1900.1-2455
288.7585 10.9612 0.7 17.3 -137.8 6.2300 16.3 2.5 GRS 1915+105
299.5731 35.2138 0.9 43.4 -141.5 11.6463 13.5 1.1 Cyg X-1
263.0326 -33.9189 7.9 33.8 44.3 0.9907 1.5 5.5 GX 354-0
278.8924 -30.1216 3.3 25.6 21.2 1.4426 3.5 ------ UNKNOWN
268.3557 14.3370 2.9 22.8 162.7 1.5800 4.0 ------ UNKNOWN
281.2228 -4.5535 1.5 0.1 -179.0 2.9281 7.5 ------ UNKNOWN
301.7980 -1.0806 4.1 20.8 -82.6 1.5179 2.8 ------ UNKNOWN
278.5114 53.0833 3.1 57.7 -165.4 7.7863 3.8 ------ UNKNOWN
305.8369 37.3648 3.7 47.8 -136.9 4.2971 3.2 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Plot creation:
Sat May 5 10:38:03 EDT 2012