batgrbproduct Analysis for Trigger=192059
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.41
Process Start Time (local time): Mon Dec 31 13:13:13 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger192059/GCN5_download_cron
======================================================================
Trigger: 00192059 Segment: 000
BAT Trigger Time: 162367464.96 [s; MET]
Trigger Stop: 162367465.984 [s; MET]
UTC: 2006-02-23T06:04:23.927580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 55.2160197959957 Dec: -17.1390558972725 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.99
Image Trigger?: NO
Rate S/N Ratio: 17.8605710994918 [ if not an image trigger ]
Image S/N Ratio: 9.99
Flight Position: [ source = BAT ]
RA: 55.2160197959957 Dec: -17.1390558972725 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 55.1928295455779 Dec: -17.1354657066992 [deg; J2000]
{ 03h 40m 46.3s , -17d 08' 07.7" }
+/- 1.17038485205601 [arcmin] (estimated 90% radius based on SNR)
+/- 0.381646346284443 [arcmin] (formal 1-sigma fit error)
SNR: 24.2943879620745
RA = 3h 40m 46.3s (55.192830 deg.)
Dec = -17d 8' 8" (-17.135466 deg.)
Angular difference between Flight and Ground position is 1.346975 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 10.8680000007153 +/- 1.09553641512797
Measured from: -1.608000010252
to: 9.25999999046326 [s; relative to TRIGTIME]
T50: 5.14400002360344 +/- 0.651717727293768
Measured from: -0.34400001168251
to: 4.80000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0760000050067902
to: 1.07600000500679 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.92399999499321
to: 10.0320000052452 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.331180 0.444459 0.275016 0.040803
0.023108 0.023921 0.021187 0.018280 [error]
Peak 0.040752 0.061831 0.044885 0.018519
0.006661 0.006938 0.006382 0.005340 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 1.17e-07 1.85e-07 2.22e-07 5.17e-07 6.73e-07 1.03e-06 erg/cm2
Error 1.26e-08 1.23e-08 2.05e-08 1.01e-07 4.85e-08 1.18e-07 erg/cm2
Peak flux Power-law 4.65e-01 4.50e-01 3.04e-01 3.20e-01 1.35e+00 1.54e+00 ph/cm2/s
Error 1.02e-01 6.08e-02 5.12e-02 1.10e-01 1.76e-01 1.99e-01 ph/cm2/s
Fluence Cutoff-PL 1.08e-07 1.96e-07 2.27e-07 2.45e-07 6.47e-07 7.70e-07 erg/cm2
Error 1.50e-08 1.58e-08 2.25e-08 1.79e-07 6.71e-08 1.86e-07 erg/cm2
Peak flux Cutoff-PL 4.58e-01 4.56e-01 3.07e-01 2.71e-01 1.34e+00 1.50e+00 ph/cm2/s
Error 1.14e-01 5.59e-02 5.60e-02 1.83e-01 2.17e-01 2.55e-01 ph/cm2/s
Fluence Band 1.06e-07 1.96e-07 2.23e-07 3.44e-07 6.47e-07 8.58e-07 erg/cm2
Error 1.55e-08 1.75e-08 2.57e-08 2.07e-07 5.41e-08 1.53e-07 erg/cm2
Peak flux Band 4.35e-01 4.76e-01 3.02e-01 2.81e-01 1.33e+00 1.49e+00 ph/cm2/s
Error 9.61e-02 7.72e-02 4.40e-02 2.15e-01 1.80e-01 2.25e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.741 0.118 - - 5.62e-03 3.90e-04 61.498 57
CPL 1.220 0.517 72.0 121.8 1.05e-02 7.05e-03 58.108 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.568 0.226 - - 1.06e-02 1.41e-03 45.935 57
CPL 1.413 0.680 186.8 5000.0 1.28e-02 1.58e-02 45.870 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 11.456000 sec.
T50 in the 50-300 keV band: 4.864000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 12.956 -2.924 10.032
T90 10.868 -1.608 9.260
T50 5.144 -0.344 4.800
Peak 1.000 0.076 1.076
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
55.1928 -17.1355 0.0079 34.4 178.7 1.0889 24.3 TRIG_00192059
------------------------------------------
Foreground time interval of the image:
-2.924 10.032 (delta_t = 12.956 [sec])
Background time interval of the image:
-299.960 -51.614 (delta_t = 248.346 [sec])
-50.960 -2.924 (delta_t = 48.036 [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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -2.924 sec. to 10.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74103 ( -0.117106 0.118908 )
Norm@50keV : 5.622865E-03 ( -3.913543E-04 3.877864E-04) )
------------------------------------------------------------
Chi-Squared = 61.49759 using 59 PHA bins.
Reduced chi-squared = 1.078905 for 57 degrees of freedom
Null hypothesis probability = 0.318
Photon flux (15-150 keV) in 12.96 sec: 0.757809 ( -0.051122 0.05122 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.72802e-07 ( -4.83538e-08 4.8613e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.924 sec. to 10.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22032 ( -0.548848 0.484317 )
Epeak [keV] : 71.9851 ( -16.6426 226.935 )
Norm@50keV : 1.049501E-02 ( -4.535943E-03 9.558649E-03) )
------------------------------------------------------------
Chi-Squared = 58.10818 using 59 PHA bins.
Reduced chi-squared = 1.037646 for 56 degrees of freedom
Null hypothesis probability = 0.398
Photon flux (15-150 keV) in 12.96 sec: 0.739260 ( -0.054002 0.053828 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47288e-07 ( -5.46368e-08 7.96029e-08 ) ergs/cm2
Band function
Time interval is from -2.924 sec. to 10.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11793 ( -0.566826 2.42303 )
beta : -2.17404 ( -7.82596 0.444588 )
Epeak [keV] : 65.0333 ( -34.8471 165.582 )
Norm@50keV : 1.208284E-02 ( -3.020711E-03 0.765816 )
------------------------------------------------------------
Chi-Squared = 57.87576 using 59 PHA bins.
Reduced chi-squared = 1.052287 for 55 degrees of freedom
Null hypothesis probability = 0.370
Photon flux (15-150 keV) in 12.96 sec: 0.737555 ( -0.053943 0.053549 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4687e-07 ( -5.40769e-08 5.41495e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.076 sec. to 1.076 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56796 ( -0.224382 0.228210 )
Norm@50keV : 1.059686E-02 ( -1.416752E-03 1.401523E-03) )
------------------------------------------------------------
Chi-Squared = 45.93493 using 59 PHA bins.
Reduced chi-squared = 0.8058760 for 57 degrees of freedom
Null hypothesis probability = 0.853
Photon flux (15-150 keV) in 1.000 sec: 1.34857 ( -0.1758 0.17608 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.95238e-08 ( -1.43007e-08 1.44322e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.076 sec. to 1.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41255 ( -0.978790 0.380416 )
Epeak [keV] : 186.803 ( -186.793 9813.20 )
Norm@50keV : 1.276130E-02 ( -3.545088E-03 2.802613E-02) )
------------------------------------------------------------
Chi-Squared = 45.87043 using 59 PHA bins.
Reduced chi-squared = 0.8191148 for 56 degrees of freedom
Null hypothesis probability = 0.831
Photon flux (15-150 keV) in 1.000 sec: 1.34265 ( -0.17264 0.26235 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.86199e-08 ( -1.58194e-08 1.51541e-08 ) ergs/cm2
Band function
Time interval is from 0.076 sec. to 1.076 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.817713 ( -9.18229 4.66067 )
beta : -1.70315 ( -8.29685 0.339469 )
Epeak [keV] : 58.0811 ( -57.9811 9880.97 )
Norm@50keV : 3.027136E-02 ( -3.027136E-02 939.902 )
------------------------------------------------------------
Chi-Squared = 45.47292 using 59 PHA bins.
Reduced chi-squared = 0.8267804 for 55 degrees of freedom
Null hypothesis probability = 0.817
Photon flux (15-150 keV) in 1.000 sec: 1.33140 ( -0.18028 0.1803 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.76363e-08 ( -1.52122e-08 1.48587e-08 ) ergs/cm2
Plot creation:
Mon Dec 31 13:24:23 EST 2007