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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.3296 -36.2983 0.0293 10.1 20.4 0.6287 6.5 TRIG_00522245
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
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 64.000000
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83944 ( -0.495835 0.545135 )
Norm@50keV : 4.01135E-04 ( -0.000139889 0.000134488 )
------------------------------------------------------------
# Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.226396e-01
Photon flux (15-150 keV) in 64 sec: 5.61433E-02 ( -0.016032 0.0160393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36103e-07 ( -7.88166e-08 8.39712e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646728 ( -4.20377 1.51501 )
Epeak [keV] : 45.1913 ( )
Norm@50keV : 2.05161E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.177472e-01
Photon flux (15-150 keV) in 64 sec: 5.38397E-02 ( -0.0161804 0.0164808 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11889e-07 ( -8.45203e-08 3.09712e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.21241 ( 0.665602 2.83106 )
beta : -2.43721 ( 10 20 )
Epeak [keV] : 29.4872 ( -18.9167 757.689 )
Norm@50keV : 6.68180 ( -9.08228 2.72869 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268113e-01
Photon flux (15-150 keV) in 64 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] : 9.87582 (-2.84385 4.4593)
R^2/D10^2 : 2.82684E-02 (-0.0282091 0.0755614)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.87 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.069854e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-08 2.239e-08
25- 50 8.739e-08 5.229e-08
50-150 4.398e-08 2.986e-08
15-150 1.672e-07 1.009e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.2836 (-45.3606 -79.2817)
Norm : 0.267111 (-0.0912713 0.156338)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.472735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.433e-08 2.698e-08
25- 50 7.282e-08 4.346e-08
50-150 1.022e-07 8.656e-08
15-150 2.193e-07 1.552e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61506 (-6.74878 5.22542)
R1^2/D10^2 : 8.88407E-02 (-0.0880567 -0.0880567)
kT2 [keV] : 19.6452 (-20.8442 -20.8442)
R2^2/D10^2 : 1.22468E-03 (-0.0010771 0.0533485)
------------------------------------------------------------
# Chi-Squared = 56.88 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.048948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-08 2.866e-08
25- 50 7.487e-08 4.288e-08
50-150 8.865e-08 5.315e-08
15-150 2.069e-07 1.081e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83944 ( -0.495835 0.545135 )
Norm@50keV : 4.01135E-04 ( -0.000139889 0.000134488 )
------------------------------------------------------------
# Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.226396e-01
Photon flux (15-150 keV) in 64 sec: 5.61433E-02 ( -0.016032 0.0160393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36103e-07 ( -7.88166e-08 8.39712e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646728 ( -4.20377 1.5144 )
Epeak [keV] : 45.1913 ( )
Norm@50keV : 2.05161E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.177472e-01
Photon flux (15-150 keV) in 64 sec: 5.38397E-02 ( -0.0161804 0.0164808 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11889e-07 ( -8.45203e-08 3.09712e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.21241 ( 0.665602 2.83106 )
beta : -2.43721 ( 10 20 )
Epeak [keV] : 29.4872 ( -18.9167 757.69 )
Norm@50keV : 6.68180 ( -9.08228 2.72692 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268113e-01
Photon flux (15-150 keV) in 64 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] : 9.87582 (-2.84385 4.4593)
R^2/D10^2 : 2.82684E-02 (-0.0282091 0.0755614)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.87 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.069854e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-08 2.139e-08
25- 50 8.739e-08 5.244e-08
50-150 4.398e-08 3.089e-08
15-150 1.672e-07 8.881e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.2836 (-45.3606 -79.2817)
Norm : 0.267111 (-0.0912713 0.156338)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.472735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.433e-08 2.743e-08
25- 50 7.282e-08 4.493e-08
50-150 1.022e-07 8.701e-08
15-150 2.193e-07 1.493e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61506 (-6.74878 5.22542)
R1^2/D10^2 : 8.88407E-02 (-0.0880567 -0.0880567)
kT2 [keV] : 19.6452 (-20.8442 -20.8442)
R2^2/D10^2 : 1.22468E-03 (-0.0010771 0.0533485)
------------------------------------------------------------
# Chi-Squared = 56.88 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.048948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-08 2.835e-08
25- 50 7.487e-08 5.005e-08
50-150 8.865e-08 5.360e-08
15-150 2.069e-07 1.201e-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: 1.83944 ( -0.495835 0.545135 )
Norm@50keV : 4.01135E-04 ( -0.000139889 0.000134488 )
------------------------------------------------------------
# Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.226396e-01
Photon flux (15-150 keV) in 64 sec: 5.61433E-02 ( -0.016032 0.0160393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36103e-07 ( -7.88166e-08 8.39712e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646728 ( -4.20377 1.51516 )
Epeak [keV] : 45.1913 ( )
Norm@50keV : 2.05161E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.177472e-01
Photon flux (15-150 keV) in 64 sec: 5.38397E-02 ( -0.0161804 0.0164808 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11889e-07 ( -8.45203e-08 3.09712e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.21241 ( 0.665602 2.83106 )
beta : -2.43721 ( 10 20 )
Epeak [keV] : 29.4872 ( -18.9167 757.692 )
Norm@50keV : 6.68180 ( -9.08228 2.72687 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268113e-01
Photon flux (15-150 keV) in 64 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) = 6.74464e-08
S(50-100 keV) = 7.53907e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 1.11779
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.17924
Count Ratio (50-100 keV) / (15-25 keV) = 0.694783
Mask shadow pattern
IMX = 1.668972038674906E-01, IMY = -6.201007989709256E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9845 -15.6397 0.7 23.2 99.8 1.8717 16.1 0.3 Sco X-1
255.9907 -37.8074 4.5 11.9 18.7 0.2511 2.6 2.2 4U 1700-377
256.3539 -36.2759 4.1 10.7 23.4 0.2649 2.8 9.7 GX 349+2
262.9183 -24.5510 0.0 5.0 130.2 0.1428 1.5 12.7 GX 1+4
264.7427 -44.4505 61.1 15.5 -18.7 0.0156 0.2 0.0 4U 1735-44
268.3109 -1.4744 13.1 27.6 165.0 0.0939 0.9 3.7 SW J1753.5-0127
270.3887 -25.2666 10.5 5.7 -150.5 0.1042 1.2 12.6 GX 5-1
270.4826 -25.7296 5.6 5.4 -146.3 0.2147 2.4 9.8 GRS 1758-258
274.0493 -13.9509 5.0 16.9 -171.5 0.2087 2.3 5.7 GX 17+2
276.1382 -30.2652 0.0 9.3 -100.2 0.1654 1.8 12.6 H1820-303
284.9068 -24.7443 0.0 17.7 -120.1 0.1014 1.0 12.7 HT1900.1-2455
288.8204 10.9120 2.0 45.8 -168.1 1.0018 5.9 2.4 GRS 1915+105
263.0175 -34.0063 9.8 5.5 1.8 -0.1025 -1.2 10.4 GX 354-0
241.6841 -25.6128 2.5 21.5 72.4 0.5380 4.6 ------ UNKNOWN
248.5555 -47.3878 1.6 22.7 10.1 0.7355 7.3 ------ UNKNOWN
269.6410 -81.2347 2.7 52.3 -21.7 1.0496 4.2 ------ UNKNOWN
240.7555 -85.6893 2.4 57.1 -18.7 1.8980 4.7 ------ UNKNOWN
323.6423 -80.5441 2.8 56.4 -30.5 2.4488 4.1 ------ UNKNOWN
313.5827 -35.2744 3.0 40.8 -89.2 1.7491 3.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
106.600590 109.430000
111.000000 667.970000
669.000000 963.095300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6434 -62.7651 0.9 49.6 3.6 16.7491 12.4 0.5 GX 301-2
244.9719 -15.6405 0.3 23.4 117.8 26.8537 38.2 0.4 Sco X-1
255.8865 -37.6872 39.6 1.8 7.6 -0.1832 -0.3 10.5 4U 1700-377
256.5630 -36.3745 2.9 0.6 50.7 2.4320 4.0 6.8 GX 349+2
262.9356 -24.5960 4.4 12.7 173.0 1.4565 2.6 9.8 GX 1+4
264.6465 -44.4723 4.1 9.9 -63.0 1.6234 2.8 4.3 4U 1735-44
268.2744 -1.4944 2.8 36.2 167.8 3.2060 4.1 6.2 SW J1753.5-0127
270.4801 -25.0055 37.2 16.0 -162.3 -0.1777 -0.3 11.5 GX 5-1
270.3108 -25.7417 2.6 15.3 -160.9 2.6568 4.5 0.5 GRS 1758-258
274.0896 -14.0901 9.8 26.8 -172.6 0.7621 1.2 5.8 GX 17+2
275.8852 -30.3439 3.0 16.6 -136.6 2.4198 3.8 2.5 H1820-303
285.0377 -24.8886 4.5 26.3 -138.9 1.7207 2.6 1.9 HT1900.1-2455
288.8070 10.9419 6.6 55.8 -172.6 3.9237 1.7 0.6 GRS 1915+105
262.9791 -33.8269 10.9 5.3 -147.3 -0.5970 -1.1 0.7 GX 354-0
227.4093 -6.5792 2.5 40.4 99.1 9.9967 4.7 ------ UNKNOWN
245.2151 -22.4319 2.5 17.4 108.6 2.6164 4.6 ------ UNKNOWN
174.3948 -58.6817 2.6 56.1 7.4 12.5066 4.4 ------ UNKNOWN
248.5326 -47.3912 0.9 12.9 -3.4 8.9820 13.4 ------ UNKNOWN
255.2026 -41.6401 1.7 5.6 -14.6 4.1664 6.9 ------ UNKNOWN
281.5122 -46.9320 3.8 20.9 -82.8 2.4911 3.0 ------ UNKNOWN
Plot creation:
Tue May 15 02:10:28 EDT 2012