Click here for the BAT GCN circular template
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
164.6685 -23.4687 0.0074 28.6581 147.1697 10.2059432 26.036 TRIG_00456967
Foreground time interval of the image:
-27.224 10.825 (delta_t = 38.049 [sec])
Background time interval of the image:
-36.875 -27.224 (delta_t = 9.651 [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 1.024000
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 1.024000
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 1.024000
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
Multiple GTIs in the spectrum
tstart tstop
-27.224000 233.744000
235.024000 1285.694000
1287.024000 1461.036000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43500 ( -0.0343165 0.0342523 )
Norm@50keV : 3.49405E-03 ( -6.20511e-05 6.20173e-05 )
------------------------------------------------------------
# Chi-Squared = 58.56 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.178209e-01
Photon flux (15-150 keV) in 1486 sec: 0.429014 ( -0.00892672 0.00896133 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98248e-05 ( -8.87999e-07 8.88233e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-27.224000 233.744000
235.024000 1285.694000
1287.024000 1461.036000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24048 ( -0.143199 0.13893 )
Epeak [keV] : 229.788 ( -72.1347 385.244 )
Norm@50keV : 4.22575E-03 ( -0.000524616 0.000617255 )
------------------------------------------------------------
# Chi-Squared = 52.82 using 59 PHA bins.
# Reduced chi-squared = 0.9433 for 56 degrees of freedom
# Null hypothesis probability = 5.958185e-01
Photon flux (15-150 keV) in 1486 sec: 0.421530 ( -0.010207 0.010275 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92774e-05 ( -9.79571e-07 9.75559e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-27.224000 233.744000
235.024000 1285.694000
1287.024000 1461.036000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24047 ( -0.0485198 0.0877728 )
beta : -10.00000 ( 2.621e+12 2.621e+12 )
Epeak [keV] : 229.746 ( -72.1202 385.147 )
Norm@50keV : 4.22524E-03 ( -0.000524664 0.000617329 )
------------------------------------------------------------
# Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 55 degrees of freedom
# Null hypothesis probability = 5.581711e-01
Photon flux (15-150 keV) in 1486 sec: 0.413085 ( 6.58692 -0.413085 ) 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] : 18.7466 ( )
R^2/D10^2 : 2.18985E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 629.67 using 59 PHA bins.
# Reduced chi-squared = 11.047 for 57 degrees of freedom
# Null hypothesis probability = 1.764813e-97
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.259e-06 8.470e-08
25- 50 1.076e-05 3.039e-07
50-150 2.772e-05 7.653e-07
15-150 4.074e-05 8.024e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.80106 ( )
------------------------------------------------------------
# Chi-Squared = 120.71 using 59 PHA bins.
# Reduced chi-squared = 2.1178 for 57 degrees of freedom
# Null hypothesis probability = 1.790764e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.664e-06 3.358e-06
25- 50 1.282e-05 6.467e-06
50-150 2.812e-05 1.421e-05
15-150 4.760e-05 2.404e-05
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.03108 (-0.581725 0.613379)
R1^2/D10^2 : 0.249943 (-0.054482 0.0744861)
kT2 [keV] : 30.0378 (-1.91867 2.34038)
R2^2/D10^2 : 3.57361E-03 (-0.000831637 0.000959692)
------------------------------------------------------------
# Chi-Squared = 59.32 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.211420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.093e-06 3.455e-07
25- 50 1.228e-05 4.688e-07
50-150 3.148e-05 1.129e-06
15-150 4.886e-05 1.538e-06
Peak spectrum fit
Power-law model
Time interval is from 646.628 sec. to 647.628 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31739 ( -0.0684767 0.068477 )
Norm@50keV : 6.86044E-02 ( -0.00262848 0.00262817 )
------------------------------------------------------------
# Chi-Squared = 88.01 using 59 PHA bins.
# Reduced chi-squared = 1.544 for 57 degrees of freedom
# Null hypothesis probability = 5.236343e-03
Photon flux (15-150 keV) in 1 sec: 8.21147 ( -0.326853 0.327277 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.75104e-07 ( -2.85727e-08 2.866e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 646.628 sec. to 647.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.992682 ( -0.284603 0.266879 )
Epeak [keV] : 168.478 ( -54.337 443.448 )
Norm@50keV : 9.73884E-02 ( -0.0237934 0.0338466 )
------------------------------------------------------------
# Chi-Squared = 83.63 using 59 PHA bins.
# Reduced chi-squared = 1.493 for 56 degrees of freedom
# Null hypothesis probability = 9.770489e-03
Photon flux (15-150 keV) in 1 sec: 8.07294 ( -0.34489 0.3451 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 646.628 sec. to 647.628 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.961329 ( -0.287342 1.05298 )
beta : -1.63534 ( 1.66713 0.343048 )
Epeak [keV] : 154.443 ( -124.309 424.105 )
Norm@50keV : 0.101338 ( -0.0245671 0.420525 )
------------------------------------------------------------
# Chi-Squared = 83.59 using 59 PHA bins.
# Reduced chi-squared = 1.520 for 55 degrees of freedom
# Null hypothesis probability = 7.740296e-03
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] : 17.7389 ( )
R^2/D10^2 : 0.542312 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 204.56 using 59 PHA bins.
# Reduced chi-squared = 3.5887 for 57 degrees of freedom
# Null hypothesis probability = 1.680322e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.432e-08 2.570e-09
25- 50 1.570e-07 8.450e-09
50-150 3.572e-07 2.450e-08
15-150 5.486e-07 2.610e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 34.1484 ( )
------------------------------------------------------------
# Chi-Squared = 119.13 using 59 PHA bins.
# Reduced chi-squared = 2.0900 for 57 degrees of freedom
# Null hypothesis probability = 2.775809e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.503e-08 4.370e-08
25- 50 1.636e-07 8.390e-08
50-150 3.587e-07 1.841e-07
15-150 6.073e-07 3.113e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.29271 (-1.16935 1.38495)
R1^2/D10^2 : 6.05421 (-2.52855 4.92364)
kT2 [keV] : 27.6787 (-3.24662 4.89973)
R2^2/D10^2 : 0.101376 (-0.0443062 0.0574717)
------------------------------------------------------------
# Chi-Squared = 86.03 using 59 PHA bins.
# Reduced chi-squared = 1.564 for 55 degrees of freedom
# Null hypothesis probability = 4.722618e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.662e-08 1.141e-08
25- 50 1.557e-07 1.505e-08
50-150 4.376e-07 5.270e-08
15-150 6.600e-07 6.420e-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: 1.32471 ( -0.0502188 0.0500612 )
Norm@50keV : 1.73213E-02 ( -0.000456801 0.000456609 )
------------------------------------------------------------
# Chi-Squared = 98.05 using 59 PHA bins.
# Reduced chi-squared = 1.720 for 57 degrees of freedom
# Null hypothesis probability = 5.924164e-04
Photon flux (15-150 keV) in 38.05 sec: 2.07618 ( -0.060065 0.0602986 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47447e-06 ( -1.80015e-07 1.80387e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27398 ( -0.182969 0.0633817 )
Epeak [keV] : 753.804 ( -996.446 -996.446 )
Norm@50keV : 1.82493E-02 ( -0.00108009 0.00353032 )
------------------------------------------------------------
# Chi-Squared = 98.12 using 59 PHA bins.
# Reduced chi-squared = 1.752 for 56 degrees of freedom
# Null hypothesis probability = 4.301427e-04
Photon flux (15-150 keV) in 38.05 sec: 2.07479 ( -0.06857 0.0603 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.45541e-06 ( -1.85608e-07 2.0098e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.200043 ( 0.778555 0.778555 )
beta : -1.36225 ( -0.0818326 0.0658878 )
Epeak [keV] : 49.3112 ( -49.2912 129.914 )
Norm@50keV : 9.47947E-02 ( -0.0951169 815.903 )
------------------------------------------------------------
# Chi-Squared = 95.40 using 59 PHA bins.
# Reduced chi-squared = 1.734 for 55 degrees of freedom
# Null hypothesis probability = 5.984126e-04
Photon flux (15-150 keV) in 38.05 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) = 1.19263e-05
S(50-100 keV) = 1.76437e-05
T90 vs. Hardness ratio plot
T90 = 846.347999989986 sec.
Hardness ratio (energy fluence ratio) = 1.47939
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.41077
Count Ratio (50-100 keV) / (15-25 keV) = 1.17227
Mask shadow pattern
IMX = -4.592405600382581E-01, IMY = -2.963044705524717E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-36.875410 -27.224000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.3969 -40.5330 6.6 47.6 -173.9 -0.2247 -1.7 6.1 Vela X-1
187.5250 6.3975 2.4 32.5 69.6 0.6303 4.9 ------ UNKNOWN
175.0300 14.6460 2.4 22.6 45.4 0.3733 4.9 ------ UNKNOWN
168.5674 34.9381 2.3 33.8 6.2 0.4329 5.1 ------ UNKNOWN
153.7250 37.5337 2.0 34.0 -15.8 0.4476 5.8 ------ UNKNOWN
115.4603 19.5530 2.3 41.7 -78.3 1.2478 5.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-27.224000 10.824590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4059 -40.5123 4.3 47.6 -173.9 1.5069 2.7 6.1 Vela X-1
190.0425 0.7895 2.3 35.1 79.6 3.6524 5.0 ------ UNKNOWN
164.6685 -23.4687 0.4 28.7 147.2 10.2054 26.0 ------ UNKNOWN
158.0133 15.1925 2.0 12.0 -0.1 1.6651 5.9 ------ UNKNOWN
133.8088 -41.9351 1.9 49.4 -173.4 3.7773 6.0 ------ UNKNOWN
148.6858 32.4958 2.6 29.5 -25.0 1.3971 4.4 ------ UNKNOWN
117.9946 -41.2967 2.3 56.1 -161.1 5.8357 5.0 ------ UNKNOWN
114.2586 -41.2487 2.2 58.2 -158.9 8.5313 5.2 ------ UNKNOWN
110.9428 -12.3858 2.4 46.6 -124.9 6.1203 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
68.524600 233.744000
235.024000 1285.694000
1287.024000 1608.074900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5665 -40.5663 0.9 29.8 -167.7 25.2371 12.4 1.9 Vela X-1
170.3701 -60.6200 1.8 37.3 139.6 24.5631 6.2 1.6 Cen X-3
186.8076 -62.7423 5.6 42.0 129.3 14.6150 2.0 4.5 GX 301-2
187.6796 -57.1238 3.4 37.5 123.9 16.5891 3.4 ------ UNKNOWN
204.8940 -13.1708 2.7 39.4 46.4 19.9098 4.3 ------ UNKNOWN
175.6449 -41.7492 2.9 20.4 120.2 8.6182 4.0 ------ UNKNOWN
193.7071 4.5475 3.9 39.9 13.3 9.2215 3.0 ------ UNKNOWN
197.2258 21.8471 3.2 55.3 1.7 30.7040 3.6 ------ UNKNOWN
164.6590 -23.4554 0.5 0.0 -2.4 50.6243 24.6 ------ UNKNOWN
110.8815 -30.5803 2.6 48.0 -146.5 17.8295 4.4 ------ UNKNOWN
102.7039 -28.5951 7.2 55.3 -145.2 24.5164 1.6 ------ UNKNOWN
112.6056 -18.6054 3.1 48.6 -130.3 34.4240 3.8 ------ UNKNOWN
Plot creation:
Sun Jul 10 10:03:04 EDT 2011