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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.7980 +0.0006 0.0357 17.6 -172.0 0.5217 5.4 TRIG_00524542
------------------------------------------
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
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)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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: 2.38895 ( -0.389472 0.449393 )
Norm@50keV : 4.27540E-04 ( -0.000143885 0.000147132 )
------------------------------------------------------------
# Chi-Squared = 49.83 using 59 PHA bins.
# Reduced chi-squared = 0.8742 for 57 degrees of freedom
# Null hypothesis probability = 7.384804e-01
Photon flux (15-150 keV) in 64 sec: 7.86066E-02 ( -0.0176868 0.0177262 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66509e-07 ( -7.18182e-08 7.7168e-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: -0.981924 ( -4.22571 2.27004 )
Epeak [keV] : 28.8443 ( -4.87013 6.98637 )
Norm@50keV : 7.52615E-02 ( -0.0852632 76.1295 )
------------------------------------------------------------
# Chi-Squared = 42.60 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 56 degrees of freedom
# Null hypothesis probability = 9.066299e-01
Photon flux (15-150 keV) in 64 sec: 7.67571E-02 ( -0.0168123 0.0169436 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2229e-07 ( -5.38035e-08 6.17152e-08 ) 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 : 1.00563 ( -2.14611 -0.875341 )
beta : -9.99979 ( 15454.9 15464.9 )
Epeak [keV] : 28.8491 ( -9.13019 6.95053 )
Norm@50keV : 7.81489E-02 ( -0.0952722 21.9703 )
------------------------------------------------------------
# Chi-Squared = 42.59 using 59 PHA bins.
# Reduced chi-squared = 0.7744 for 55 degrees of freedom
# Null hypothesis probability = 8.889745e-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] : 7.48181 (-1.39413 1.67907)
R^2/D10^2 : 0.124089 (-0.070576 0.165116)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 42.67 using 59 PHA bins.
# Reduced chi-squared = 0.7486 for 57 degrees of freedom
# Null hypothesis probability = 9.208448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.613e-08 3.066e-08
25- 50 1.182e-07 5.262e-08
50-150 2.478e-08 1.608e-08
15-150 2.191e-07 9.315e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.4026 (-11.5358 21.743)
Norm : 0.616073 (-0.210126 0.327568)
------------------------------------------------------------
# Chi-Squared = 45.50 using 59 PHA bins.
# Reduced chi-squared = 0.7983 for 57 degrees of freedom
# Null hypothesis probability = 8.633932e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.330e-08 2.838e-08
25- 50 9.919e-08 4.042e-08
50-150 5.995e-08 4.070e-08
15-150 2.424e-07 8.646e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.29215 (-5.30984 -5.30984)
R1^2/D10^2 : 0.154330 (-0.153935 -0.153935)
kT2 [keV] : 8.47617 (-8.55007 -8.55007)
R2^2/D10^2 : 5.57729E-02 (-0.0524914 0.231096)
------------------------------------------------------------
# Chi-Squared = 42.54 using 59 PHA bins.
# Reduced chi-squared = 0.7735 for 55 degrees of freedom
# Null hypothesis probability = 8.900478e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.823e-08 3.853e-07
25- 50 1.156e-07 1.756e-06
50-150 3.067e-08 6.157e-06
15-150 2.245e-07 4.922e-06
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: 2.38895 ( -0.389472 0.449393 )
Norm@50keV : 4.27540E-04 ( -0.000143885 0.000147132 )
------------------------------------------------------------
# Chi-Squared = 49.83 using 59 PHA bins.
# Reduced chi-squared = 0.8742 for 57 degrees of freedom
# Null hypothesis probability = 7.384804e-01
Photon flux (15-150 keV) in 64 sec: 7.86066E-02 ( -0.0176868 0.0177262 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66509e-07 ( -7.18182e-08 7.7168e-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: -0.981924 ( -4.22571 2.27004 )
Epeak [keV] : 28.8443 ( -4.87013 6.9908 )
Norm@50keV : 7.52615E-02 ( -0.0852632 76.1295 )
------------------------------------------------------------
# Chi-Squared = 42.60 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 56 degrees of freedom
# Null hypothesis probability = 9.066299e-01
Photon flux (15-150 keV) in 64 sec: 7.67571E-02 ( -0.0168123 0.0169436 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2229e-07 ( -5.38035e-08 6.17152e-08 ) 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 : 1.00563 ( -2.14611 -0.875341 )
beta : -9.99979 ( 15454.9 15464.9 )
Epeak [keV] : 28.8491 ( -9.13019 6.95053 )
Norm@50keV : 7.81489E-02 ( -0.0952722 21.9626 )
------------------------------------------------------------
# Chi-Squared = 42.59 using 59 PHA bins.
# Reduced chi-squared = 0.7744 for 55 degrees of freedom
# Null hypothesis probability = 8.889745e-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] : 7.48181 (-1.39413 1.67907)
R^2/D10^2 : 0.124089 (-0.070576 0.165116)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 42.67 using 59 PHA bins.
# Reduced chi-squared = 0.7486 for 57 degrees of freedom
# Null hypothesis probability = 9.208448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.613e-08 3.501e-08
25- 50 1.182e-07 5.070e-08
50-150 2.478e-08 1.613e-08
15-150 2.191e-07 9.856e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.4026 (-11.5358 21.743)
Norm : 0.616073 (-0.210126 0.327568)
------------------------------------------------------------
# Chi-Squared = 45.50 using 59 PHA bins.
# Reduced chi-squared = 0.7983 for 57 degrees of freedom
# Null hypothesis probability = 8.633932e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.330e-08 3.022e-08
25- 50 9.919e-08 3.738e-08
50-150 5.995e-08 4.117e-08
15-150 2.424e-07 1.005e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.29215 (-5.30984 -5.30984)
R1^2/D10^2 : 0.154330 (-0.153935 -0.153935)
kT2 [keV] : 8.47617 (-8.55007 -8.55007)
R2^2/D10^2 : 5.57729E-02 (-0.0524914 0.231096)
------------------------------------------------------------
# Chi-Squared = 42.54 using 59 PHA bins.
# Reduced chi-squared = 0.7735 for 55 degrees of freedom
# Null hypothesis probability = 8.900478e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.823e-08 6.365e-07
25- 50 1.156e-07 1.965e-06
50-150 3.067e-08 4.720e-06
15-150 2.245e-07 6.723e-06
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: 2.38895 ( -0.389472 0.449393 )
Norm@50keV : 4.27540E-04 ( -0.000143885 0.000147132 )
------------------------------------------------------------
# Chi-Squared = 49.83 using 59 PHA bins.
# Reduced chi-squared = 0.8742 for 57 degrees of freedom
# Null hypothesis probability = 7.384804e-01
Photon flux (15-150 keV) in 64 sec: 7.86066E-02 ( -0.0176868 0.0177262 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66509e-07 ( -7.18182e-08 7.7168e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.981924 ( -4.22571 2.27004 )
Epeak [keV] : 28.8443 ( -4.87013 6.99687 )
Norm@50keV : 7.52615E-02 ( -0.0852632 76.1295 )
------------------------------------------------------------
# Chi-Squared = 42.60 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 56 degrees of freedom
# Null hypothesis probability = 9.066299e-01
Photon flux (15-150 keV) in 64 sec: 7.67571E-02 ( -0.0168123 0.0169436 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2229e-07 ( -5.38035e-08 6.17152e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.00563 ( -2.14611 -0.875341 )
beta : -9.99979 ( 15454.9 15464.9 )
Epeak [keV] : 28.8491 ( -9.13019 6.95053 )
Norm@50keV : 7.81489E-02 ( -0.0952722 21.9862 )
------------------------------------------------------------
# Chi-Squared = 42.59 using 59 PHA bins.
# Reduced chi-squared = 0.7744 for 55 degrees of freedom
# Null hypothesis probability = 8.889745e-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) = 8.72422e-08
S(50-100 keV) = 6.67386e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.764981
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.814805
Count Ratio (50-100 keV) / (15-25 keV) = 0.127404
Mask shadow pattern
IMX = -3.138341780589828E-01, IMY = 4.412070835592503E-02
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 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9952 -15.6377 0.7 29.4 69.9 2.5514 15.8 0.9 Sco X-1
255.8260 -37.7988 3.2 27.8 18.2 0.3955 3.6 8.1 4U 1700-377
256.3121 -36.3095 4.0 26.5 19.9 0.2968 2.8 9.1 GX 349+2
263.0975 -24.7844 6.0 14.6 34.5 0.1836 1.9 5.4 GX 1+4
264.6681 -44.3371 4.0 29.7 -0.9 0.3397 2.9 7.5 4U 1735-44
268.2107 -1.5307 113.9 16.2 136.1 -0.0103 -0.1 10.5 SW J1753.5-0127
270.3227 -25.2492 6.9 10.4 10.5 0.1643 1.7 10.4 GX 5-1
270.2455 -25.6908 6.4 10.8 9.7 0.2164 2.2 4.4 GRS 1758-258
273.9321 -14.1712 4.8 2.5 123.6 0.2335 2.4 9.2 GX 17+2
275.8778 -30.2855 4.6 14.2 -17.8 0.2366 2.5 5.5 H1820-303
284.9483 -24.9860 9.6 12.5 -59.7 0.1210 1.2 6.2 HT1900.1-2455
288.8323 10.9271 2.3 30.0 -169.9 0.5432 5.1 2.3 GRS 1915+105
299.6394 35.2172 4.3 56.1 -173.0 1.1710 2.7 2.6 Cyg X-1
263.0736 -33.7653 3.4 21.0 13.5 0.3515 3.4 5.9 GX 354-0
229.7695 -23.8816 2.0 43.5 55.4 2.2007 5.8 ------ UNKNOWN
282.7980 0.0006 2.1 17.6 -172.0 0.5218 5.4 ------ UNKNOWN
293.3879 25.9915 2.3 45.5 -174.0 0.8661 5.1 ------ UNKNOWN
307.5162 34.6025 3.2 59.1 -166.1 2.3517 3.6 ------ UNKNOWN
317.6747 -36.6950 2.6 42.5 -69.4 2.1120 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
152.900600 963.112300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9798 -15.6472 0.9 40.5 122.8 30.2480 13.5 0.4 Sco X-1
254.4497 35.2344 74.8 44.0 -156.6 0.1468 0.2 6.5 Her X-1
263.0268 -24.7462 214.2 31.3 93.6 0.0627 0.1 1.0 GX 1+4
268.3574 -1.4516 2.7 14.5 141.5 2.2744 4.3 0.6 SW J1753.5-0127
270.4845 -25.0223 9.2 27.7 81.9 1.2192 1.3 11.4 GX 5-1
270.3306 -25.5958 7.2 28.3 81.7 1.6330 1.6 9.0 GRS 1758-258
273.9950 -13.9851 2.7 16.5 89.0 2.4318 4.3 3.1 GX 17+2
276.0125 -30.3823 3.4 31.1 68.8 3.4390 3.4 4.6 H1820-303
284.8079 -24.9700 0.0 25.1 53.1 1.9260 2.9 12.8 HT1900.1-2455
288.8221 10.9502 0.9 12.4 -94.3 7.0573 12.9 1.4 GRS 1915+105
299.5907 35.1849 1.4 38.5 -100.4 19.3369 8.2 1.0 Cyg X-1
263.0046 -33.8936 6.3 38.7 84.1 5.1221 1.8 3.6 GX 354-0
244.5016 -12.9138 3.4 40.1 127.0 6.4635 3.5 ------ UNKNOWN
320.5340 -25.0580 3.4 44.2 4.8 3.1867 3.4 ------ UNKNOWN
327.5264 -1.1563 3.4 44.7 -31.0 2.9629 3.4 ------ UNKNOWN
240.9652 44.5712 4.1 57.9 -156.8 10.9577 2.8 ------ UNKNOWN
258.7820 49.0674 3.2 53.2 -142.1 11.3029 3.6 ------ UNKNOWN
253.8480 49.4016 4.8 55.3 -145.2 11.6271 2.4 ------ UNKNOWN
300.9281 37.7746 2.8 41.3 -100.8 13.0865 4.1 ------ UNKNOWN
Plot creation:
Mon Jun 18 05:44:19 EDT 2012