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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.3266 -4.9411 0.0116 35.6880 117.2420 0.3294945 16.582 TRIG_00455904
Foreground time interval of the image:
0.000 0.024 (delta_t = 0.024 [sec])
Background time interval of the image:
-239.812 0.000 (delta_t = 239.812 [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 0.032000
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)
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 0.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88305 ( -0.169442 0.184746 )
Norm@50keV : 0.426071 ( -0.0660715 0.0650251 )
------------------------------------------------------------
# Chi-Squared = 66.83 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.750289e-01
Photon flux (15-150 keV) in 0.024 sec: 107.763 ( -12.3 12.3043 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16713e-07 ( -1.36285e-08 1.36503e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.213684 ( -1.2135 1.03731 )
Epeak [keV] : 27.9678 ( -5.99351 3.9565 )
Norm@50keV : 34.0470 ( -34.047 154.39 )
------------------------------------------------------------
# Chi-Squared = 37.00 using 59 PHA bins.
# Reduced chi-squared = 0.6607 for 56 degrees of freedom
# Null hypothesis probability = 9.765200e-01
Photon flux (15-150 keV) in 0.024 sec: 113.976 ( -12.571 12.573 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25729e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.214392 ( -0.914598 1.4215 )
beta : -9.99983 ( 19042.2 19052.2 )
Epeak [keV] : 27.9613 ( -5.99135 3.9553 )
Norm@50keV : 34.0967 ( -34.0971 155.049 )
------------------------------------------------------------
# Chi-Squared = 37.00 using 59 PHA bins.
# Reduced chi-squared = 0.6727 for 55 degrees of freedom
# Null hypothesis probability = 9.702661e-01
Photon flux (15-150 keV) in 0.024 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] : 7.96838 (-0.711508 0.697611)
R^2/D10^2 : 140.201 (-43.2819 67.6577)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 40.81 using 59 PHA bins.
# Reduced chi-squared = 0.7159 for 57 degrees of freedom
# Null hypothesis probability = 9.479951e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.852e-08 6.264e-09
25- 50 6.696e-08 8.172e-09
50-150 1.735e-08 4.966e-09
15-150 1.228e-07 1.486e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.3119 (-3.63484 4.10845)
Norm : 1071.78 (-188.031 222.593)
------------------------------------------------------------
# Chi-Squared = 43.57 using 59 PHA bins.
# Reduced chi-squared = 0.7643 for 57 degrees of freedom
# Null hypothesis probability = 9.048330e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.865e-08 6.312e-09
25- 50 5.149e-08 6.324e-09
50-150 2.357e-08 6.326e-09
15-150 1.237e-07 1.535e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.85619 (-2.85645 12.0539)
R1^2/D10^2 : 982.302 (-875.848 866577)
kT2 [keV] : 8.97850 (-1.16927 6.92741)
R2^2/D10^2 : 69.3842 (-68.4385 76.8961)
------------------------------------------------------------
# Chi-Squared = 36.52 using 59 PHA bins.
# Reduced chi-squared = 0.6640 for 55 degrees of freedom
# Null hypothesis probability = 9.740948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.401e-08 2.308e-08
25- 50 6.109e-08 3.392e-08
50-150 2.099e-08 1.200e-08
15-150 1.261e-07 6.536e-08
Peak spectrum fit
Power-law model
Time interval is from -0.486 sec. to 0.514 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.44720 ( -0.247438 0.276197 )
Norm@50keV : 1.90136E-02 ( -0.00382332 0.00372441 )
------------------------------------------------------------
# Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.616954e-01
Photon flux (15-150 keV) in 1 sec: 3.61762 ( -0.485122 0.485218 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87559e-07 ( -2.92037e-08 2.97817e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.486 sec. to 0.514 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25064 ( -1.63674 0.757293 )
Epeak [keV] : 23.2226 ( )
Norm@50keV : 0.105668 ( )
------------------------------------------------------------
# Chi-Squared = 57.61 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.153107e-01
Photon flux (15-150 keV) in 1 sec: 3.53775 ( -0.49191 0.49342 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73024e-07 ( -2.9061e-08 3.3148e-08 ) ergs/cm2
Band function
Time interval is from -0.486 sec. to 0.514 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19595 ( -0.936985 1.20326 )
beta : -3.67032 ( 3.65127 1.27776 )
Epeak [keV] : 23.7093 ( -12.3086 8.23914 )
Norm@50keV : 0.114588 ( -0.0363196 5956.51 )
------------------------------------------------------------
# Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.880320e-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] : 8.04612 (-1.13058 1.24488)
R^2/D10^2 : 3.92915 (-1.76089 3.3897)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.75 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.243890e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.619e-08 1.195e-08
25- 50 8.166e-08 1.673e-08
50-150 2.185e-08 8.110e-09
15-150 1.497e-07 2.785e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.0994 (-9.18751 13.6559)
Norm : 25.9578 (-6.17322 8.44895)
------------------------------------------------------------
# Chi-Squared = 57.63 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.517132e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.678e-08 9.825e-09
25- 50 7.036e-08 1.127e-08
50-150 4.689e-08 1.960e-08
15-150 1.740e-07 3.405e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.49744 (-1.57546 2.2462)
R1^2/D10^2 : 72.1873 (-62.0028 2241.43)
kT2 [keV] : 10.5073 (-2.14105 4.62804)
R2^2/D10^2 : 1.04594 (-0.883539 1.96116)
------------------------------------------------------------
# Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.088413e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.682e-08 3.006e-08
25- 50 7.152e-08 3.799e-08
50-150 3.825e-08 2.295e-08
15-150 1.666e-07 8.540e-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: 2.88305 ( -0.169442 0.184746 )
Norm@50keV : 0.426071 ( -0.0660715 0.0650251 )
------------------------------------------------------------
# Chi-Squared = 66.83 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.750289e-01
Photon flux (15-150 keV) in 0.024 sec: 107.763 ( -12.3 12.3043 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16713e-07 ( -1.36285e-08 1.36503e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.213684 ( -1.2135 1.03731 )
Epeak [keV] : 27.9678 ( -5.99351 3.9565 )
Norm@50keV : 34.0470 ( -34.047 154.39 )
------------------------------------------------------------
# Chi-Squared = 37.00 using 59 PHA bins.
# Reduced chi-squared = 0.6607 for 56 degrees of freedom
# Null hypothesis probability = 9.765200e-01
Photon flux (15-150 keV) in 0.024 sec: 113.976 ( -12.571 12.573 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25729e-07 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.214392 ( -0.914598 1.4215 )
beta : -9.99983 ( 19042.2 19052.2 )
Epeak [keV] : 27.9613 ( -5.99135 3.9553 )
Norm@50keV : 34.0967 ( -34.0971 155.049 )
------------------------------------------------------------
# Chi-Squared = 37.00 using 59 PHA bins.
# Reduced chi-squared = 0.6727 for 55 degrees of freedom
# Null hypothesis probability = 9.702661e-01
Photon flux (15-150 keV) in 0.024 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) = 3.91558e-08
S(50-100 keV) = 2.12356e-08
T90 vs. Hardness ratio plot
T90 = 0.0199999809265137 sec.
Hardness ratio (energy fluence ratio) = 0.542336
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.00436
Count Ratio (50-100 keV) / (15-25 keV) = 0.278142
Mask shadow pattern
IMX = -3.287815392335487E-01, IMY = -6.385882527558204E-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:
-239.812000 0.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.7892 10.9491 1.1 26.2 147.5 2.7224 10.1 0.6 GRS 1915+105
299.5783 35.1981 0.5 33.1 -159.7 5.5233 21.2 0.6 Cyg X-1
308.1905 40.9121 2.5 36.2 -145.1 1.3594 4.6 4.4 Cyg X-3
326.0378 38.3615 4.0 34.8 -121.1 1.0753 2.9 6.7 Cyg X-2
271.9237 44.3825 2.7 54.1 -173.6 3.2030 4.3 ------ UNKNOWN
314.3548 31.3833 3.2 26.2 -137.4 0.8859 3.7 ------ UNKNOWN
300.9771 59.4027 4.6 55.3 -145.3 3.6081 2.5 ------ UNKNOWN
5.1619 1.6389 2.8 50.6 -44.8 4.9128 4.2 324.9 UNKNOWN
350.7722 27.3298 2.6 40.9 -83.7 4.7269 4.5 ------ UNKNOWN
322.6712 53.2962 3.3 48.6 -130.5 3.4845 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.024000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
288.7984 10.7550 5.2 26.2 147.1 -0.0152 -2.2 11.4 GRS 1915+105
299.5370 35.1244 3.8 33.0 -159.8 0.0161 3.0 5.3 Cyg X-1
308.2158 40.8951 10.1 36.2 -145.1 -0.0048 -1.1 5.9 Cyg X-3
326.0476 38.4103 4.6 34.9 -121.1 -0.0093 -2.5 7.9 Cyg X-2
280.3266 -4.9411 0.7 35.7 117.2 0.3295 16.6 ------ UNKNOWN
344.5984 35.6919 2.4 41.2 -98.8 0.0458 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
69.888590 731.588600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9730 -15.6423 0.6 36.3 137.6 18.9399 20.0 0.4 Sco X-1
254.3513 35.4720 0.0 47.2 -141.6 -0.9436 -0.8 9.3 Her X-1
256.1209 -37.8760 7.5 39.7 97.9 3.2008 1.5 6.6 4U 1700-377
256.4409 -36.4257 35.9 38.4 99.1 0.6114 0.3 0.3 GX 349+2
263.0112 -24.7131 1.1 25.9 105.8 7.3903 10.2 1.9 GX 1+4
268.2937 -1.4763 4.7 12.5 173.0 1.2327 2.5 4.7 SW J1753.5-0127
270.3147 -25.0769 1.7 22.3 92.0 4.1935 6.8 1.7 GX 5-1
270.1050 -25.8247 4.9 23.1 91.5 1.5411 2.4 11.7 GRS 1758-258
274.1348 -14.0805 12.8 11.0 100.7 0.4413 0.9 8.0 GX 17+2
275.9332 -30.3647 3.1 25.8 76.2 3.0332 3.7 0.4 H1820-303
285.2491 -24.8332 0.0 20.5 54.6 1.0406 1.7 12.7 HT1900.1-2455
288.7886 10.9575 0.8 18.0 -84.7 7.9588 15.0 0.9 GRS 1915+105
313.8379 -22.8434 2.9 37.0 9.7 2.8481 4.0 ------ UNKNOWN
248.5178 10.3698 2.8 35.2 -176.7 2.5093 4.1 ------ UNKNOWN
313.9842 -14.1894 3.0 34.4 -4.5 2.3487 3.8 ------ UNKNOWN
309.2465 -12.3436 3.3 29.5 -6.1 1.8356 3.5 ------ UNKNOWN
324.8962 -16.4008 2.2 45.2 -4.2 4.8530 5.2 ------ UNKNOWN
329.7898 -1.1850 2.8 49.5 -25.2 4.1536 4.2 ------ UNKNOWN
245.0099 39.7563 5.0 55.2 -145.3 10.7919 2.4 ------ UNKNOWN
262.7636 40.8758 3.5 48.5 -130.3 9.5346 3.3 ------ UNKNOWN
256.7945 41.1873 2.8 50.9 -135.3 14.2329 4.1 ------ UNKNOWN
Plot creation:
Tue Jul 5 10:42:22 EDT 2011