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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3491 -4.9526 0.0086 4.5 96.1 0.1185 22.3 TRIG_00456505
------------------------------------------
Foreground time interval of the image:
-0.004 0.044 (delta_t = 0.048 [sec])
Background time interval of the image:
-239.992 -0.004 (delta_t = 239.988 [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 0.016000
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 0.016000
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 0.016000
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 -0.004 sec. to 0.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88168 ( )
Norm@50keV : 5.98672E-02 ( )
------------------------------------------------------------
# Chi-Squared = 166.95 using 59 PHA bins.
# Reduced chi-squared = 2.9290 for 57 degrees of freedom
# Null hypothesis probability = 1.001760e-12
Photon flux (15-150 keV) in 0.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.43594 ( -0.953019 0.822609 )
Epeak [keV] : 33.7868 ( -2.62364 2.39667 )
Norm@50keV : 21.5001 ( -21.5051 57.2885 )
------------------------------------------------------------
# Chi-Squared = 67.73 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 56 degrees of freedom
# Null hypothesis probability = 1.353225e-01
Photon flux (15-150 keV) in 0.048 sec: 17.5825 ( -1.5546 1.5566 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.43677 ( -0.65804 1.20671 )
beta : -9.99869 ( 2415.97 2425.97 )
Epeak [keV] : 33.7773 ( -2.62233 2.39582 )
Norm@50keV : 21.5416 ( -21.5431 57.4404 )
------------------------------------------------------------
# Chi-Squared = 67.74 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.161511e-01
Photon flux (15-150 keV) in 0.048 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] : 8.80774 (-0.555977 0.545521)
R^2/D10^2 : 15.3911 (-3.48036 4.70715)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.54 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 57 degrees of freedom
# Null hypothesis probability = 1.601204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.103e-08 1.320e-09
25- 50 2.266e-08 2.165e-09
50-150 8.087e-09 1.757e-09
15-150 4.177e-08 4.078e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.2801 (-2.92898 3.12851)
Norm : 151.439 (-19.7772 21.9486)
------------------------------------------------------------
# Chi-Squared = 106.15 using 59 PHA bins.
# Reduced chi-squared = 1.8624 for 57 degrees of freedom
# Null hypothesis probability = 8.445002e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.434e-08 1.524e-09
25- 50 1.584e-08 1.490e-09
50-150 8.018e-09 1.668e-09
15-150 3.820e-08 3.734e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.12623 (-3.12772 11.1811)
R1^2/D10^2 : 116.149 (-115.982 2390.91)
kT2 [keV] : 9.02800 (-0.664725 -9.02834)
R2^2/D10^2 : 13.4010 (-13.398 5.86751)
------------------------------------------------------------
# Chi-Squared = 66.77 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 55 degrees of freedom
# Null hypothesis probability = 1.326718e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.156e-08 3.598e-09
25- 50 2.206e-08 5.446e-09
50-150 8.410e-09 2.251e-09
15-150 4.204e-08 9.298e-09
Peak spectrum fit
Power-law model
Time interval is from -0.478 sec. to 0.522 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94497 ( -0.239254 0.256044 )
Norm@50keV : 7.41392E-03 ( -0.00130359 0.00127388 )
------------------------------------------------------------
# Chi-Squared = 75.79 using 59 PHA bins.
# Reduced chi-squared = 1.330 for 57 degrees of freedom
# Null hypothesis probability = 4.871473e-02
Photon flux (15-150 keV) in 1 sec: 1.08487 ( -0.152898 0.152919 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.822e-08 ( -1.14046e-08 1.17173e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.478 sec. to 0.522 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.82303E-02 ( -1.90013 1.4309 )
Epeak [keV] : 41.5264 ( -7.2528 11.4635 )
Norm@50keV : 0.115892 ( -0.117715 1.40492 )
------------------------------------------------------------
# Chi-Squared = 69.28 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 56 degrees of freedom
# Null hypothesis probability = 1.094904e-01
Photon flux (15-150 keV) in 1 sec: 1.02409 ( -0.155908 0.15695 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.83035e-08 ( -1.03372e-08 1.21377e-08 ) ergs/cm2
Band function
Time interval is from -0.478 sec. to 0.522 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.130542 ( -1.42918 2.99723 )
beta : -3.91541 ( 3.99004 1.71144 )
Epeak [keV] : 41.5423 ( -9.72937 8.39868 )
Norm@50keV : 0.120533 ( -0.071522 13.7781 )
------------------------------------------------------------
# Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.545019e-02
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] : 10.4128 (-1.33707 1.5399)
R^2/D10^2 : 0.463394 (-0.191335 0.318193)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.91 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.018067e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.036e-08 2.668e-09
25- 50 2.725e-08 5.510e-09
50-150 1.597e-08 5.808e-09
15-150 5.358e-08 1.069e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.1829 (-21.8986 41.6751)
Norm : 5.51295 (-1.09141 1.32989)
------------------------------------------------------------
# Chi-Squared = 71.92 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 57 degrees of freedom
# Null hypothesis probability = 8.808283e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.408e-08 2.405e-09
25- 50 2.215e-08 4.030e-09
50-150 2.758e-08 1.101e-08
15-150 6.380e-08 1.384e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.77453 (-1.45381 7.0489)
R1^2/D10^2 : 865.945 (-880.834 -881.133)
kT2 [keV] : 11.0714 (-1.54961 -11.0669)
R2^2/D10^2 : 0.352273 (-0.347748 0.164765)
------------------------------------------------------------
# Chi-Squared = 67.67 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 55 degrees of freedom
# Null hypothesis probability = 1.172881e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.166e-08 3.479e-09
25- 50 2.580e-08 8.285e-09
50-150 1.792e-08 7.357e-09
15-150 5.538e-08 1.409e-08
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: 2.88168 ( )
Norm@50keV : 5.98672E-02 ( )
------------------------------------------------------------
# Chi-Squared = 166.95 using 59 PHA bins.
# Reduced chi-squared = 2.9290 for 57 degrees of freedom
# Null hypothesis probability = 1.001760e-12
Photon flux (15-150 keV) in 0.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.43594 ( -0.953019 0.822609 )
Epeak [keV] : 33.7868 ( -2.62364 2.39667 )
Norm@50keV : 21.5001 ( -21.5051 57.2885 )
------------------------------------------------------------
# Chi-Squared = 67.73 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 56 degrees of freedom
# Null hypothesis probability = 1.353225e-01
Photon flux (15-150 keV) in 0.048 sec: 17.5825 ( -1.5546 1.5566 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.43677 ( -0.65804 1.20671 )
beta : -9.99869 ( 2415.97 2425.97 )
Epeak [keV] : 33.7773 ( -2.62233 2.39582 )
Norm@50keV : 21.5416 ( -21.5431 57.4404 )
------------------------------------------------------------
# Chi-Squared = 67.74 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.161511e-01
Photon flux (15-150 keV) in 0.048 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) =
S(50-100 keV) =
T90 vs. Hardness ratio plot
T90 = 0.0359999537467957 sec.
Hardness ratio (energy fluence ratio) =
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31686
Count Ratio (50-100 keV) / (15-25 keV) = 0.438559
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.016000
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:
-239.992000 -0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9813 -15.6410 0.8 39.8 134.0 9.6492 15.1 0.1 Sco X-1
254.4925 35.3964 37.0 44.8 -145.3 0.1375 0.3 3.7 Her X-1
263.0182 -24.7139 1.6 30.3 104.5 3.0515 7.1 2.0 GX 1+4
268.4366 -1.3229 5.3 14.1 156.0 0.4706 2.2 8.8 SW J1753.5-0127
270.2700 -25.2392 3.8 27.0 92.6 1.0622 3.1 9.6 GX 5-1
270.4666 -25.7040 3.8 27.3 91.8 1.1683 3.3 9.2 GRS 1758-258
274.0129 -13.9942 1.8 15.5 100.0 1.6108 6.6 2.6 GX 17+2
275.7686 -30.4722 45.3 30.2 79.2 0.1095 0.3 10.3 H1820-303
285.2330 -24.8635 8.4 24.0 61.5 0.4046 1.4 11.3 HT1900.1-2455
288.8023 10.9366 0.7 13.5 -84.9 4.3187 17.1 0.6 GRS 1915+105
299.5925 35.1872 1.9 39.5 -90.3 7.3640 6.0 0.9 Cyg X-1
276.8114 -26.0948 3.3 25.7 79.5 1.1350 3.5 ------ UNKNOWN
312.2495 -17.6663 2.8 33.7 9.1 1.2246 4.1 ------ UNKNOWN
301.5974 -13.3781 4.0 22.6 11.7 0.6548 2.9 ------ UNKNOWN
272.8146 1.0599 2.5 9.9 169.4 1.0198 4.6 ------ UNKNOWN
329.3601 -11.3866 2.6 47.6 -7.8 1.9061 4.5 ------ UNKNOWN
288.2846 22.4670 2.3 24.1 -99.3 1.2617 5.0 ------ UNKNOWN
245.0383 42.8620 3.7 55.2 -145.3 4.7745 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.004000 0.044000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0122 -15.8280 6.9 39.8 133.7 -0.0244 -1.7 11.4 Sco X-1
254.6132 35.2896 4.8 44.6 -145.3 -0.0259 -2.4 8.2 Her X-1
263.0792 -24.9079 20.8 30.4 104.2 -0.0057 -0.6 10.5 GX 1+4
268.4264 -1.6373 6.5 14.1 154.7 -0.0095 -1.8 11.6 SW J1753.5-0127
270.2205 -24.8854 0.0 26.7 93.0 -0.0040 -0.5 12.1 GX 5-1
270.3701 -25.9269 7.6 27.6 91.7 -0.0143 -1.5 11.6 GRS 1758-258
274.2029 -13.9572 0.0 15.4 99.5 -0.0077 -1.3 12.4 GX 17+2
275.8315 -30.2483 6.2 30.0 79.2 -0.0181 -1.8 8.6 H1820-303
285.1533 -25.0254 9.5 24.2 61.7 -0.0088 -1.2 9.0 HT1900.1-2455
288.7362 10.8246 5.5 13.3 -84.9 -0.0122 -2.1 8.1 GRS 1915+105
299.4965 35.3041 10.5 39.6 -90.5 0.0226 1.1 7.7 Cyg X-1
285.4366 -38.0164 2.3 37.1 63.8 0.0720 4.9 ------ UNKNOWN
227.6257 12.3116 2.4 56.1 173.2 0.1601 4.9 ------ UNKNOWN
280.3490 -4.9526 0.5 4.5 96.1 0.1186 22.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
51.108590 962.048000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9769 -15.6463 0.4 36.3 162.5 32.5318 31.6 0.4 Sco X-1
256.0012 -37.8043 5.8 39.7 123.0 -4.4880 -2.0 2.5 4U 1700-377
256.4585 -36.4468 34.7 38.4 124.0 0.6776 0.3 1.8 GX 349+2
263.0020 -24.7600 1.2 25.9 130.6 8.0604 9.4 0.9 GX 1+4
268.3560 -1.5648 3.3 12.4 -162.4 2.7070 3.5 6.8 SW J1753.5-0127
270.2465 -25.0535 4.6 22.3 117.0 2.1471 2.5 2.6 GX 5-1
270.2111 -25.8877 4.5 23.1 116.1 2.2991 2.6 10.0 GRS 1758-258
274.0265 -14.0276 1.5 11.0 126.2 5.1076 7.8 1.3 GX 17+2
275.7752 -30.3457 11.8 25.8 101.4 0.9896 1.0 7.9 H1820-303
285.0997 -24.9074 3.4 20.5 79.9 3.4189 3.4 3.6 HT1900.1-2455
288.8200 10.9545 0.5 18.0 -59.7 15.7678 21.2 1.4 GRS 1915+105
318.3442 -34.2345 3.3 45.8 47.1 10.1979 3.5 ------ UNKNOWN
306.9051 -24.3587 2.8 32.1 42.2 4.4783 4.2 ------ UNKNOWN
258.3580 -12.0969 4.1 22.9 162.6 2.0638 2.9 ------ UNKNOWN
255.1986 -9.4878 2.9 25.3 170.5 2.8753 4.0 ------ UNKNOWN
283.1431 -2.4937 3.1 3.7 -38.5 2.5071 3.7 ------ UNKNOWN
231.4825 23.0647 4.4 55.3 -145.1 12.6224 2.6 ------ UNKNOWN
260.4096 33.7582 5.4 43.0 -112.2 9.3713 2.1 ------ UNKNOWN
Plot creation:
Tue Jul 5 11:49:59 EDT 2011