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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.6223 +18.3248 0.0315 24.4 -76.4 0.0141 6.1 TRIG_00421695
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.800 -24.670 (delta_t = 36.130 [sec])
-23.800 -4.800 (delta_t = 19.000 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 0.032000
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 0.032000
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 0.032000
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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.12299 ( -0.541289 0.752409 )
Norm@50keV : 2.33420E-03 ( -0.00233764 0.00135874 )
------------------------------------------------------------
# Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8235 for 57 degrees of freedom
# Null hypothesis probability = 8.265199e-01
Photon flux (15-150 keV) in 0.032 sec: 1.60549 ( -0.751992 0.751401 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80396e-09 ( -8.2153e-10 8.21184e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.05591E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 56 degrees of freedom
# Null hypothesis probability = 3.955433e-01
Photon flux (15-150 keV) in 0.032 sec: 2.90617 ( -0.9617 0.96176 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80528e-09 ( -8.21869e-10 8.216e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.95470 ( 91.4628 101.365 )
beta : -4.12333 ( -0.751783 0.542599 )
Epeak [keV] : 71.5494 ( -71.5494 -71.5494 )
Norm@50keV : 0.317568 ( -0.189782 0.184383 )
------------------------------------------------------------
# Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8535 for 55 degrees of freedom
# Null hypothesis probability = 7.718613e-01
Photon flux (15-150 keV) in 0.032 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] : 6.48051 (-1.0791 0.744375)
R^2/D10^2 : 8.36183 (-4.28624 10.1187)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 34.81 using 59 PHA bins.
# Reduced chi-squared = 0.6108 for 57 degrees of freedom
# Null hypothesis probability = 9.910488e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.654e-09 7.242e-10
25- 50 1.942e-09 9.149e-10
50-150 2.415e-10 1.596e-10
15-150 3.838e-09 1.617e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0808 (-3.5211 3.22984)
Norm : 48.0650 (-23.2764 31.6059)
------------------------------------------------------------
# Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7039 for 57 degrees of freedom
# Null hypothesis probability = 9.560851e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.655e-09 6.870e-10
25- 50 1.059e-09 4.858e-10
50-150 1.637e-10 1.088e-10
15-150 2.878e-09 1.217e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.50676 (-6.50126 3.46684)
R1^2/D10^2 : 8.10728 (-8.12623 -8.12623)
kT2 [keV] : 6.29013 (-6.21986 -6.21986)
R2^2/D10^2 : 0.114338 (-0.127756 -0.127756)
------------------------------------------------------------
# Chi-Squared = 34.82 using 59 PHA bins.
# Reduced chi-squared = 0.6330 for 55 degrees of freedom
# Null hypothesis probability = 9.847031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.646e-09 9.634e-04
25- 50 1.946e-09 8.758e-03
50-150 2.454e-10 1.989e-01
15-150 3.837e-09 2.082e-01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.12931 ( -0.530065 0.742976 )
Norm@50keV : 2.35569E-03 ( -0.00235789 0.00135505 )
------------------------------------------------------------
# Chi-Squared = 47.25 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 57 degrees of freedom
# Null hypothesis probability = 8.178921e-01
Photon flux (15-150 keV) in 0.032 sec: 1.62877 ( -0.742921 0.742266 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82848e-09 ( -8.12285e-10 8.12022e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.06856E-03 ( )
------------------------------------------------------------
# Chi-Squared = 59.09 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 56 degrees of freedom
# Null hypothesis probability = 3.634662e-01
Photon flux (15-150 keV) in 0.032 sec: 2.92744 ( -0.95462 0.95362 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82979e-09 ( -8.12598e-10 8.124e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.95392 ( 89.804 99.7029 )
beta : -4.13015 ( -0.742159 0.531105 )
Epeak [keV] : 71.3850 ( -71.385 -71.385 )
Norm@50keV : 0.320238 ( -0.189367 0.183907 )
------------------------------------------------------------
# Chi-Squared = 47.25 using 59 PHA bins.
# Reduced chi-squared = 0.8592 for 55 degrees of freedom
# Null hypothesis probability = 7.617853e-01
Photon flux (15-150 keV) in 0.032 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] : 6.47202 (-1.07767 0.738986)
R^2/D10^2 : 8.46517 (-4.29477 10.1838)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 35.04 using 59 PHA bins.
# Reduced chi-squared = 0.6147 for 57 degrees of freedom
# Null hypothesis probability = 9.903130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.668e-09 6.866e-10
25- 50 1.953e-09 8.224e-10
50-150 2.415e-10 1.510e-10
15-150 3.862e-09 1.721e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5361 (-3.00738 3.74099)
Norm : 50.0291 (-18.1007 30.3359)
------------------------------------------------------------
# Chi-Squared = 40.38 using 59 PHA bins.
# Reduced chi-squared = 0.7084 for 57 degrees of freedom
# Null hypothesis probability = 9.531691e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.700e-09 3.861e-09
25- 50 1.050e-09 3.650e-09
50-150 1.505e-10 1.345e-09
15-150 2.901e-09 9.006e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49716 (-6.49674 0.715592)
R1^2/D10^2 : 8.32385 (-8.31523 -8.31523)
kT2 [keV] : 4.76324 (-5.95831 -5.95831)
R2^2/D10^2 : 3.89028E-02 (-0.000760387 -0.000760387)
------------------------------------------------------------
# Chi-Squared = 35.04 using 59 PHA bins.
# Reduced chi-squared = 0.6372 for 55 degrees of freedom
# Null hypothesis probability = 9.835356e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.663e-09 5.400e-05
25- 50 1.961e-09 4.710e-04
50-150 2.461e-10 1.197e-02
15-150 3.870e-09 1.167e-02
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: 4.12299 ( -0.541289 0.752409 )
Norm@50keV : 2.33420E-03 ( -0.00233764 0.00135874 )
------------------------------------------------------------
# Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8235 for 57 degrees of freedom
# Null hypothesis probability = 8.265199e-01
Photon flux (15-150 keV) in 0.032 sec: 1.60549 ( -0.751992 0.751401 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80396e-09 ( -8.2153e-10 8.21184e-10 ) 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 : 2.05591E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.17 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 56 degrees of freedom
# Null hypothesis probability = 3.955433e-01
Photon flux (15-150 keV) in 0.032 sec: 2.90617 ( -0.9617 0.96176 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80528e-09 ( -8.21869e-10 8.216e-10 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.95470 ( 91.4628 101.365 )
beta : -4.12333 ( -0.751783 0.542599 )
Epeak [keV] : 71.5494 ( -71.5494 -71.5494 )
Norm@50keV : 0.317568 ( -0.189782 0.184383 )
------------------------------------------------------------
# Chi-Squared = 46.94 using 59 PHA bins.
# Reduced chi-squared = 0.8535 for 55 degrees of freedom
# Null hypothesis probability = 7.718613e-01
Photon flux (15-150 keV) in 0.032 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) = 4.73578e-10
S(50-100 keV) = 1.08789e-10
T90 vs. Hardness ratio plot
T90 = 0.0320000052452087 sec.
Hardness ratio (energy fluence ratio) = 0.229717
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.8
Count Ratio (50-100 keV) / (15-25 keV) = 0.325102
Mask shadow pattern
IMX = 1.070892413306814E-01, IMY = 4.409947594176273E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
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:
-60.800000 -24.670000
-23.800000 -4.800000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9933 -15.6487 0.9 29.3 55.8 1.6799 12.6 0.9 Sco X-1
254.4028 35.2843 3.4 23.9 -151.0 0.3096 3.4 4.4 Her X-1
255.8701 -37.7349 7.9 49.2 33.5 0.6428 1.5 8.6 4U 1700-377
256.4554 -36.4245 25.3 47.8 32.9 0.1603 0.5 1.0 GX 349+2
262.9991 -24.7503 3.7 36.7 22.9 0.4022 3.1 0.6 GX 1+4
268.4760 -1.3544 5.0 17.5 -11.1 0.1908 2.3 8.8 SW J1753.5-0127
270.3805 -25.0126 32.0 38.9 12.5 0.0498 0.4 6.6 GX 5-1
270.3959 -25.6599 9.0 39.5 12.9 -0.1800 -1.3 7.1 GRS 1758-258
273.8614 -14.0572 4.3 30.8 -1.7 0.2732 2.7 8.5 GX 17+2
275.7743 -30.3631 7.8 45.8 9.4 0.2680 1.5 7.8 H1820-303
284.8667 -24.8831 7.6 45.7 -4.2 -0.2592 -1.5 9.5 HT1900.1-2455
288.8660 10.9366 8.0 31.9 -59.4 0.1859 1.4 4.0 GRS 1915+105
255.9891 -2.6450 2.5 14.1 34.6 0.3538 4.6 ------ UNKNOWN
255.2494 61.6784 3.1 50.3 -147.7 0.9298 3.8 ------ UNKNOWN
303.6905 4.7743 2.9 47.3 -52.9 1.5295 3.9 ------ UNKNOWN
293.2969 35.4719 2.9 41.1 -99.0 1.7850 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1931 -15.6836 22.4 29.3 55.4 -0.0017 -0.5 12.6 Sco X-1
254.6773 35.2800 129.7 23.9 -150.4 -0.0002 -0.1 11.4 Her X-1
255.9028 -37.9008 4.3 49.3 33.5 -0.0382 -2.7 5.2 4U 1700-377
256.3111 -36.3397 6.2 47.8 33.1 0.0190 1.8 7.8 GX 349+2
263.1440 -24.6987 84.2 36.7 22.7 0.0005 0.1 7.9 GX 1+4
268.3252 -1.6571 0.0 17.7 -10.0 -0.0011 -0.5 12.5 SW J1753.5-0127
270.2705 -25.2547 3.1 39.1 12.8 -0.0123 -3.7 10.6 GX 5-1
270.4741 -25.7487 14.5 39.6 12.9 0.0028 0.8 9.3 GRS 1758-258
273.8493 -14.0393 5.2 30.8 -1.7 0.0053 2.2 9.1 GX 17+2
275.7204 -30.3229 63.7 45.7 9.4 -0.0009 -0.2 10.9 H1820-303
284.9904 -25.0446 6.0 45.9 -4.2 0.0078 1.9 7.8 HT1900.1-2455
288.6988 11.0430 14.3 31.7 -59.6 0.0023 0.8 8.3 GRS 1915+105
292.9970 -19.4342 2.5 47.5 -16.8 0.0201 4.6 ------ UNKNOWN
280.6223 18.3247 1.9 24.4 -76.4 0.0141 6.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
56.100600 302.290000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4604 35.1517 7.8 28.6 163.7 0.4042 1.5 11.4 Her X-1
268.2951 -1.4550 11.7 23.2 65.2 0.2795 1.0 4.4 SW J1753.5-0127
270.2425 -25.2345 0.0 44.7 45.8 0.8942 1.0 9.6 GX 5-1
270.1074 -25.7276 14.0 45.2 45.8 0.7715 0.8 10.6 GRS 1758-258
273.8792 -14.0542 12.6 33.0 44.4 0.3194 0.9 7.4 GX 17+2
275.9477 -30.4260 5.0 48.9 37.7 -2.5019 -2.3 3.7 H1820-303
285.2389 -24.9535 16.3 43.5 26.3 0.3212 0.7 11.2 HT1900.1-2455
288.8038 10.9449 1.3 10.8 -15.8 1.7667 8.8 0.3 GRS 1915+105
299.5866 35.1945 0.3 23.8 -106.4 10.1734 41.5 0.5 Cyg X-1
308.1306 40.9758 3.2 32.7 -107.3 1.3198 3.6 1.7 Cyg X-3
248.3018 12.3069 3.2 31.7 116.2 1.4201 3.6 ------ UNKNOWN
244.9453 21.9586 2.8 33.6 134.7 1.3870 4.1 ------ UNKNOWN
237.0738 69.7534 2.5 57.8 -164.0 5.4823 4.6 ------ UNKNOWN
327.5597 12.8239 2.7 45.4 -57.7 4.3049 4.3 ------ UNKNOWN
Plot creation:
Wed May 12 05:59:10 EDT 2010