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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
278.4463 -8.5334 0.0164 17.0 -118.7 0.0320 11.8 TRIG_00416485
------------------------------------------
Foreground time interval of the image:
0.000 0.016 (delta_t = 0.016 [sec])
Background time interval of the image:
-239.408 -149.058 (delta_t = 90.350 [sec])
-148.408 0.000 (delta_t = 148.408 [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 0.016000
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)
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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.57591 ( -0.211611 0.244519 )
Norm@50keV : 6.37841E-02 ( -0.0136462 0.0132885 )
------------------------------------------------------------
# Chi-Squared = 74.23 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.223419e-02
Photon flux (15-150 keV) in 0.016 sec: 13.1366 ( -2.10303 2.10311 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04239e-08 ( -1.81578e-09 1.82498e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.02269 ( -1.50243 1.18818 )
Epeak [keV] : 38.2229 ( -5.28171 4.78744 )
Norm@50keV : 7.10775 ( -7.18418 45.3011 )
------------------------------------------------------------
# Chi-Squared = 43.52 using 59 PHA bins.
# Reduced chi-squared = 0.7771 for 56 degrees of freedom
# Null hypothesis probability = 8.880280e-01
Photon flux (15-150 keV) in 0.016 sec: 14.9967 ( -2.1771 2.1808 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.291e-08 ( -1.98462e-09 2.00075e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.971315 ( -0.458484 2.01312 )
beta : -9.99990 ( 31843.5 31853.5 )
Epeak [keV] : 37.6247 ( -4.73561 5.412 )
Norm@50keV : 6.91839 ( -6.91839 45.9168 )
------------------------------------------------------------
# Chi-Squared = 43.56 using 59 PHA bins.
# Reduced chi-squared = 0.7920 for 55 degrees of freedom
# Null hypothesis probability = 8.669778e-01
Photon flux (15-150 keV) in 0.016 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] : 10.0481 (-1.18519 1.18748)
R^2/D10^2 : 8.06030 (-2.91689 4.90954)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 43.77 using 59 PHA bins.
# Reduced chi-squared = 0.7680 for 57 degrees of freedom
# Null hypothesis probability = 9.008227e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.656e-09 5.712e-10
25- 50 6.649e-09 1.087e-09
50-150 3.519e-09 1.160e-09
15-150 1.282e-08 2.474e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.3988 (-7.54328 8.91659)
Norm : 102.932 (-20.5443 24.1369)
------------------------------------------------------------
# Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 0.9781 for 57 degrees of freedom
# Null hypothesis probability = 5.219549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.693e-09 5.832e-10
25- 50 4.715e-09 7.496e-10
50-150 3.383e-09 1.169e-09
15-150 1.179e-08 2.026e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.08376 (-3.08376 162.839)
R1^2/D10^2 : 201.580 (-201.581 -201.581)
kT2 [keV] : 10.6323 (-1.42223 -10.6323)
R2^2/D10^2 : 6.04570 (-6.04573 5.15222)
------------------------------------------------------------
# Chi-Squared = 42.39 using 59 PHA bins.
# Reduced chi-squared = 0.7708 for 55 degrees of freedom
# Null hypothesis probability = 8.932051e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.981e-09 1.417e-09
25- 50 6.247e-09 2.948e-09
50-150 3.812e-09 2.103e-09
15-150 1.304e-08 6.204e-09
Peak spectrum fit
Power-law model
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65871 ( -0.941155 1.07435 )
Norm@50keV : 1.86287E-03 ( -0.00184244 0.0011326 )
------------------------------------------------------------
# Chi-Squared = 42.24 using 59 PHA bins.
# Reduced chi-squared = 0.7411 for 57 degrees of freedom
# Null hypothesis probability = 9.278007e-01
Photon flux (15-150 keV) in 1 sec: 0.241688 ( -0.141739 0.142384 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70071e-08 ( -1.05817e-08 1.1561e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775779 ( 0.870451 3.04725 )
Epeak [keV] : 52.3234 ( -51.8041 -51.8041 )
Norm@50keV : 3.68667E-02 ( -0.047248 8.95881 )
------------------------------------------------------------
# Chi-Squared = 40.79 using 59 PHA bins.
# Reduced chi-squared = 0.7283 for 56 degrees of freedom
# Null hypothesis probability = 9.368440e-01
Photon flux (15-150 keV) in 1 sec: 0.227326 ( -0.129315 0.141198 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48461e-08 ( -8.87544e-09 1.14984e-08 ) ergs/cm2
Band function
Time interval is from -0.490 sec. to 0.510 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.938728 ( -1.71845 0.281547 )
beta : -10.00000 ( 6.41112e+08 6.41112e+08 )
Epeak [keV] : 51.6016 ( -45.5621 -51.2567 )
Norm@50keV : 4.59939E-02 ( -0.0525078 4.89372 )
------------------------------------------------------------
# Chi-Squared = 40.78 using 59 PHA bins.
# Reduced chi-squared = 0.7414 for 55 degrees of freedom
# Null hypothesis probability = 9.235894e-01
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] : 12.9819 (-5.76917 11.1945)
R^2/D10^2 : 4.99169E-02 (-0.0499143 0.363921)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 40.82 using 59 PHA bins.
# Reduced chi-squared = 0.7161 for 57 degrees of freedom
# Null hypothesis probability = 9.478779e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.784e-09 1.274e-09
25- 50 6.136e-09 4.228e-09
50-150 6.532e-09 4.859e-09
15-150 1.445e-08 1.067e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.9715 (-100 -100)
Norm : 1.11135 (-0.661986 0.913116)
------------------------------------------------------------
# Chi-Squared = 41.70 using 59 PHA bins.
# Reduced chi-squared = 0.7316 for 57 degrees of freedom
# Null hypothesis probability = 9.359664e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.905e-09 2.060e-09
25- 50 5.022e-09 3.494e-09
50-150 8.138e-09 6.935e-09
15-150 1.606e-08 1.257e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.66423 (-7.69976 -7.69976)
R1^2/D10^2 : 3.18252E-02 (-0.0724352 -0.0724352)
kT2 [keV] : 13.5357 (-15.6566 -15.6566)
R2^2/D10^2 : 3.93710E-02 (-0.0177682 -0.0177682)
------------------------------------------------------------
# Chi-Squared = 40.79 using 59 PHA bins.
# Reduced chi-squared = 0.7416 for 55 degrees of freedom
# Null hypothesis probability = 9.233468e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.854e-09 3.758e-07
25- 50 6.021e-09 3.078e-06
50-150 6.628e-09 8.830e-05
15-150 1.450e-08 7.930e-05
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: 2.57591 ( -0.211611 0.244519 )
Norm@50keV : 6.37841E-02 ( -0.0136462 0.0132885 )
------------------------------------------------------------
# Chi-Squared = 74.23 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.223419e-02
Photon flux (15-150 keV) in 0.016 sec: 13.1366 ( -2.10303 2.10311 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04239e-08 ( -1.81578e-09 1.82498e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.02269 ( -1.50243 1.18818 )
Epeak [keV] : 38.2229 ( -5.28171 4.78744 )
Norm@50keV : 7.10775 ( -7.18418 45.3011 )
------------------------------------------------------------
# Chi-Squared = 43.52 using 59 PHA bins.
# Reduced chi-squared = 0.7771 for 56 degrees of freedom
# Null hypothesis probability = 8.880280e-01
Photon flux (15-150 keV) in 0.016 sec: 14.9967 ( -2.1771 2.1808 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.291e-08 ( -1.98462e-09 2.00075e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.971315 ( -0.458484 2.01312 )
beta : -9.99990 ( 31843.5 31853.5 )
Epeak [keV] : 37.6247 ( -4.73561 5.412 )
Norm@50keV : 6.91839 ( -6.91839 45.9168 )
------------------------------------------------------------
# Chi-Squared = 43.56 using 59 PHA bins.
# Reduced chi-squared = 0.7920 for 55 degrees of freedom
# Null hypothesis probability = 8.669778e-01
Photon flux (15-150 keV) in 0.016 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) = 3.48102e-09
S(50-100 keV) = 2.33354e-09
T90 vs. Hardness ratio plot
T90 = 0.0119999647140503 sec.
Hardness ratio (energy fluence ratio) = 0.670361
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.39104
Count Ratio (50-100 keV) / (15-25 keV) = 0.688648
Mask shadow pattern
IMX = -1.470749607790515E-01, IMY = 2.683740771290820E-01
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:
-239.408000 -149.058000
-148.408000 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9744 -15.6377 0.3 16.6 72.3 10.1607 43.8 0.3 Sco X-1
254.3432 35.3888 3.9 50.2 161.0 -2.2025 -3.0 6.2 Her X-1
255.9892 -37.8262 0.6 24.2 1.0 4.7040 20.6 1.1 4U 1700-377
256.4229 -36.4483 5.8 22.8 1.1 0.4545 2.0 1.6 GX 349+2
263.1256 -24.9169 6.5 10.7 -15.8 0.4120 1.8 12.1 GX 1+4
264.5182 -44.5787 0.0 30.4 -14.2 -0.0820 -0.4 12.3 4U 1735-44
268.2980 -1.4129 4.5 14.2 -164.8 0.5681 2.6 4.8 SW J1753.5-0127
270.1741 -25.1882 2.4 13.3 -44.4 1.1629 4.9 8.9 GX 5-1
270.3975 -25.7724 3.2 13.9 -43.6 0.8858 3.7 5.4 GRS 1758-258
273.8724 -14.0489 5.4 11.4 -100.4 0.4748 2.1 7.8 GX 17+2
276.0686 -30.3242 5.3 20.6 -47.2 0.5313 2.2 7.9 H1820-303
284.9072 -25.0045 7.6 24.0 -70.7 0.4581 1.5 8.6 HT1900.1-2455
288.8064 10.9176 1.1 36.5 -143.0 3.2068 10.3 1.7 GRS 1915+105
220.6801 -14.8448 2.2 40.0 73.0 4.5375 5.3 ------ UNKNOWN
248.7131 15.2492 2.7 32.3 144.5 1.3360 4.3 ------ UNKNOWN
267.2101 37.2451 2.7 51.7 174.4 2.9159 4.2 ------ UNKNOWN
248.1431 -48.7656 2.5 36.4 4.7 1.3380 4.6 ------ UNKNOWN
255.7041 -48.7874 1.0 34.9 -3.4 3.4246 11.8 ------ UNKNOWN
251.9761 -71.0103 2.6 57.1 -6.9 4.6915 4.5 ------ UNKNOWN
288.0866 -49.6000 2.6 41.2 -36.3 1.5811 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.016000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0420 -15.5073 5.6 16.5 72.7 0.0058 2.1 8.8 Sco X-1
254.4683 35.3808 3.2 50.2 161.1 -0.0307 -3.7 2.4 Her X-1
255.7891 -37.9078 7.9 24.3 1.4 -0.0042 -1.5 10.1 4U 1700-377
256.5602 -36.6009 0.0 22.9 0.7 0.0029 1.1 12.3 GX 349+2
262.8673 -24.6323 6.0 10.4 -14.7 -0.0049 -1.9 10.3 GX 1+4
264.9324 -44.3178 5.9 30.1 -14.8 0.0055 2.0 11.4 4U 1735-44
268.5336 -1.3454 13.9 14.4 -164.0 0.0020 0.8 11.8 SW J1753.5-0127
270.2704 -24.9284 9.9 13.1 -45.4 -0.0031 -1.2 9.1 GX 5-1
270.4599 -25.7524 4.5 13.9 -43.8 0.0067 2.6 8.5 GRS 1758-258
273.8325 -14.1610 0.0 11.4 -99.9 0.0011 0.4 12.6 GX 17+2
275.9244 -30.4267 27.2 20.6 -46.7 0.0012 0.4 3.6 H1820-303
284.9488 -24.8618 45.0 23.9 -71.1 0.0008 0.3 5.9 HT1900.1-2455
288.9388 11.0305 361.0 36.7 -143.0 -0.0001 -0.0 9.7 GRS 1915+105
274.7400 40.2180 2.1 55.7 -179.1 0.0604 5.6 ------ UNKNOWN
278.4463 -8.5334 1.0 17.0 -118.7 0.0320 11.8 ------ UNKNOWN
289.0639 34.2573 2.5 54.9 -163.5 0.0416 4.6 ------ UNKNOWN
305.3279 -49.5667 2.4 49.8 -46.4 0.0573 4.7 ------ UNKNOWN
304.9991 -38.0122 2.8 44.7 -60.5 0.0419 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
50.392600 182.652000
183.592000 621.572000
622.592000 962.702000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9746 -15.6486 0.5 33.4 75.7 30.4939 24.0 0.6 Sco X-1
254.4628 35.4431 5.5 49.5 155.4 -4.5276 -2.1 6.0 Her X-1
255.9905 -37.8524 0.8 35.6 32.4 12.4485 13.7 0.5 4U 1700-377
256.3818 -36.5486 3.6 34.4 33.5 2.9494 3.2 8.0 GX 349+2
263.0272 -24.8510 25.6 21.9 41.4 0.2973 0.5 6.4 GX 1+4
264.5743 -44.4322 25.9 37.8 17.4 0.3852 0.4 7.3 4U 1735-44
268.4444 -1.5032 4.4 12.2 126.0 1.5470 2.6 5.5 SW J1753.5-0127
270.2942 -25.1045 1.5 18.3 25.3 4.4198 7.5 1.6 GX 5-1
270.2830 -25.8438 4.1 19.0 24.4 1.6539 2.8 6.1 GRS 1758-258
274.0257 -14.0436 2.5 7.0 39.0 2.8207 4.6 1.2 GX 17+2
275.8645 -30.2681 8.3 21.9 7.2 0.8554 1.4 6.7 H1820-303
285.0020 -24.9272 19.9 17.5 -18.9 -0.3511 -0.6 1.9 HT1900.1-2455
288.8106 10.9481 0.6 22.1 -150.7 12.7356 19.5 0.7 GRS 1915+105
299.5732 35.2029 0.5 48.1 -155.4 35.6339 22.5 0.8 Cyg X-1
308.1295 40.9223 7.6 56.5 -152.1 6.4285 1.5 2.0 Cyg X-3
238.0489 -16.7701 2.3 40.2 75.3 10.9656 5.0 ------ UNKNOWN
240.7648 7.9477 3.3 41.0 113.9 8.3295 3.6 ------ UNKNOWN
255.6975 -48.8099 1.0 44.6 22.5 16.0657 12.0 ------ UNKNOWN
276.0721 48.3712 3.5 57.0 179.4 11.6533 3.3 ------ UNKNOWN
322.6361 -31.5275 5.4 47.0 -53.1 8.5243 2.1 ------ UNKNOWN
Plot creation:
Sat Mar 20 12:15:36 EDT 2010