batgrbproduct Analysis for Trigger=141092
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): Thu Jan 10 18:09:22 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger141092/SDC
======================================================================
Trigger: 00141092 Segment: 000
BAT Trigger Time: 140463822.272 [s; MET]
Trigger Stop: 140463826.368 [s; MET]
UTC: 2005-06-14T17:43:42.699680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 139.849920858842 Dec: -39.1212453785021 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.41
Image Trigger?: NO
Rate S/N Ratio: 11.3137084989848 [ if not an image trigger ]
Image S/N Ratio: 14.41
Flight Position: [ source = BAT ]
RA: 139.849920858842 Dec: -39.1212453785021 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.87662883648 Dec: -39.1284730556992 [deg; J2000]
{ 09h 19m 30.4s , -39d 07' 42.5" }
+/- 0.910866110833555 [arcmin] (estimated 90% radius based on SNR)
+/- 0.291013895210563 [arcmin] (formal 1-sigma fit error)
SNR: 34.7568540010891
RA = 9h 19m 30.4s (139.876629 deg.)
Dec = -39d 7' 43" (-39.128473 deg.)
Angular difference between Flight and Ground position is 1.316627 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 27.052000015974 +/- 16.2499586429075
Measured from: -8.0280000269413
to: 19.0239999890327 [s; relative to TRIGTIME]
T50: 13.2680000066757 +/- 1.68620402610763
Measured from: -3.33200001716614
to: 9.93599998950958 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -4.64800000190735
to: -3.64800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: -25.2480000257492
to: 23.8679999709129 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.201458 0.871863 0.051338 -0.026830
0.035323 0.035951 0.031890 0.034156 [error]
Peak 0.043404 0.040214 0.005395 0.005758
0.005104 0.005117 0.004529 0.004945 [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 3.99e-07 3.14e-07 1.66e-07 1.27e-07 9.36e-07 1.01e-06 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Power-law 3.97e-01 2.45e-01 9.67e-02 5.15e-02 7.65e-01 7.90e-01 ph/cm2/s
Error 7.33e-02 4.14e-02 3.01e-02 2.85e-02 1.19e-01 1.26e-01 ph/cm2/s
Fluence Cutoff-PL 3.49e-07 3.77e-07 4.58e-08 1.63e-10 7.72e-07 7.72e-07 erg/cm2
Error 3.58e-08 2.60e-08 1.91e-08 4.07e-10 5.16e-08 5.16e-08 erg/cm2
Peak flux Cutoff-PL 3.65e-01 3.43e-01 3.19e-02 6.68e-05 7.40e-01 7.40e-01 ph/cm2/s
Error 7.62e-02 5.63e-02 2.84e-02 8.22e-04 1.09e-01 1.09e-01 ph/cm2/s
Fluence Band 3.52e-07 3.77e-07 4.27e-08 3.70e-10 7.64e-07 7.92e-07 erg/cm2
Error 2.60e-08 1.62e-08 1.31e-10 5.21e-08 4.41e-08 0.00e+00 erg/cm2
Peak flux Band 3.91e-01 3.08e-01 6.31e-02 2.16e-03 7.64e-01 7.64e-01 ph/cm2/s
Error 7.16e-02 3.53e-02 1.58e-02 1.29e-02 1.12e-01 1.12e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.919 0.000 - - 1.64e-03 0.00e+00 116.514 57
CPL -1.189 1.283 23.8 2.2 9.77e-01 0.00e+00 47.873 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.338 0.297 - - 4.28e-03 1.03e-03 68.861 57
CPL -2.472 1.435 29.1 3.6 7.75e+00 4.63e+00 53.240 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 49.116 -25.248 23.868
T90 27.052 -8.028 19.024
T50 13.268 -3.332 9.936
Peak 1.000 -4.648 -3.648
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.8766 -39.1285 0.0055 11.4 -44.7 2.8330 34.8 TRIG_00141092
------------------------------------------
Foreground time interval of the image:
-25.248 23.868 (delta_t = 49.116 [sec])
Background time interval of the image:
-119.272 -25.248 (delta_t = 94.024 [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 -25.248 sec. to 23.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.91930 ( )
Norm@50keV : 1.644702E-03 ( )
------------------------------------------------------------
Chi-Squared = 116.5140 using 59 PHA bins.
Reduced chi-squared = 2.044105 for 57 degrees of freedom
Null hypothesis probability = 5.675E-06
Photon flux (15-150 keV) in 49.12 sec: 0.426787 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.3635e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -25.248 sec. to 23.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.18904 ( -1.65589 0.910925 )
Epeak [keV] : 23.8169 ( -2.17249 2.27299 )
Norm@50keV : 0.977479 ( )
------------------------------------------------------------
Chi-Squared = 47.87336 using 59 PHA bins.
Reduced chi-squared = 0.8548813 for 56 degrees of freedom
Null hypothesis probability = 0.772
Photon flux (15-150 keV) in 49.12 sec: 0.384148 ( -0.027392 0.027352 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.71528e-07 ( -5.10848e-08 5.21163e-08 ) ergs/cm2
Band function
Time interval is from -25.248 sec. to 23.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.60659 ( -0.109062 6.724298E-02) )
beta : -8.65154 ( -1.34846 18.6514 )
Epeak [keV] : 10.5579 ( -2.90129 1.42007 )
Norm@50keV : 1.115913E-02 ( -1.63402 10.6279 )
------------------------------------------------------------
Chi-Squared = 77.03518 using 59 PHA bins.
Reduced chi-squared = 1.400640 for 55 degrees of freedom
Null hypothesis probability = 2.658E-02
Photon flux (15-150 keV) in 49.12 sec: 0.389098 ( -0.021721 0.021817 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64175e-07 ( -4.52395e-08 5.88703e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -4.648 sec. to -3.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33818 ( -0.283356 0.311290 )
Norm@50keV : 4.281565E-03 ( -1.025411E-03 1.036928E-03) )
------------------------------------------------------------
Chi-Squared = 68.86070 using 59 PHA bins.
Reduced chi-squared = 1.208083 for 57 degrees of freedom
Null hypothesis probability = 0.135
Photon flux (15-150 keV) in 1.000 sec: 0.764528 ( -0.118924 0.119092 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12311e-08 ( -8.0105e-09 8.461e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.648 sec. to -3.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.47175 ( -0.528250 2.34119 )
Epeak [keV] : 29.1233 ( -3.53363 3.66484 )
Norm@50keV : 7.74607 ( -7.74607 1.51948 )
------------------------------------------------------------
Chi-Squared = 53.23959 using 59 PHA bins.
Reduced chi-squared = 0.9507070 for 56 degrees of freedom
Null hypothesis probability = 0.580
Photon flux (15-150 keV) in 1.000 sec: 0.739743 ( -0.107657 0.110358 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29711e-08 ( -5.1018e-09 5.8155e-09 ) ergs/cm2
Band function
Time interval is from -4.648 sec. to -3.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.773910 ( -4.70794 0.909076 )
beta : -9.29075 ( -6.49901 0.688112 )
Epeak [keV] : 26.0507 ( -2.81364 40.2241 )
Norm@50keV : 4.835237E-02 ( -16.6988 222.989 )
------------------------------------------------------------
Chi-Squared = 58.93090 using 59 PHA bins.
Reduced chi-squared = 1.071471 for 55 degrees of freedom
Null hypothesis probability = 0.334
Photon flux (15-150 keV) in 1.000 sec: 0.763631 ( -0.112168 0.112168 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.54891e-08 ( -5.2952e-09 5.1966e-09 ) ergs/cm2
Plot creation:
Thu Jan 10 18:21:34 EST 2008