batgrbproduct Analysis for Trigger=201391
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 13:59:07 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger201391/GCN5_download_cron
======================================================================
Trigger: 00201391 Segment: 000
BAT Trigger Time: 163820173.824 [s; MET]
Trigger Stop: 163820174.848 [s; MET]
UTC: 2006-03-12T01:36:12.758340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 45.7682083493773 Dec: 12.8200326522603 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.02
Image Trigger?: NO
Rate S/N Ratio: 14.6628782986152 [ if not an image trigger ]
Image S/N Ratio: 8.02
Flight Position: [ source = BAT ]
RA: 45.7682083493773 Dec: 12.8200326522603 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 45.7840729711601 Dec: 12.8256503954322 [deg; J2000]
{ 03h 03m 08.2s , +12d 49' 32.3" }
+/- 0.86573194293405 [arcmin] (estimated 90% radius based on SNR)
+/- 0.212793584519418 [arcmin] (formal 1-sigma fit error)
SNR: 37.374088161928
RA = 3h 3m 8.2s (45.784073 deg.)
Dec = 12d 49' 32" (12.825650 deg.)
Angular difference between Flight and Ground position is 0.987448 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 45.2760000228882 +/- 12.3476775316329
Measured from: -25.6960000097752
to: 19.580000013113 [s; relative to TRIGTIME]
T50: 16.3680000007153 +/- 1.64645558106472
Measured from: -6.38400000333786
to: 9.9839999973774 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.63199999928474
to: 6.63199999928474 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.2479999959469
to: 46.5079999864101 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.283898 1.468676 0.750526 0.160158
0.045267 0.046122 0.039925 0.033422 [error]
Peak 0.052715 0.081166 0.049561 0.008489
0.005813 0.006136 0.005271 0.004184 [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 3.90e-07 5.70e-07 6.20e-07 1.26e-06 1.97e-06 2.84e-06 erg/cm2
Error 2.92e-08 2.47e-08 4.00e-08 1.76e-07 9.10e-08 2.07e-07 erg/cm2
Peak flux Power-law 5.35e-01 5.12e-01 3.42e-01 3.55e-01 1.53e+00 1.74e+00 ph/cm2/s
Error 7.94e-02 4.84e-02 4.27e-02 8.81e-02 1.42e-01 1.63e-01 ph/cm2/s
Fluence Cutoff-PL 3.71e-07 5.86e-07 6.22e-07 7.60e-07 1.91e-06 2.33e-06 erg/cm2
Error 3.55e-08 3.04e-08 4.21e-08 4.24e-07 1.12e-07 4.42e-07 erg/cm2
Peak flux Cutoff-PL 4.82e-01 5.57e-01 3.56e-01 1.53e-01 1.49e+00 1.55e+00 ph/cm2/s
Error 9.25e-02 6.36e-02 4.87e-02 1.24e-01 1.46e-01 2.22e-01 ph/cm2/s
Fluence Band 3.56e-07 5.95e-07 6.04e-07 1.01e-06 1.90e-06 2.57e-06 erg/cm2
Error 3.84e-08 3.28e-08 4.39e-08 2.61e-07 1.04e-07 3.67e-07 erg/cm2
Peak flux Band 4.74e-01 5.71e-01 3.36e-01 2.58e-01 1.50e+00 1.64e+00 ph/cm2/s
Error 9.77e-02 6.91e-02 5.76e-02 1.96e-01 1.48e-01 2.30e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.878 0.085 - - 2.82e-03 1.30e-04 49.218 57
CPL 1.498 0.000 61.9 4975.1 4.45e-03 1.88e-03 46.728 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.585 0.158 - - 1.20e-02 1.17e-03 55.989 57
CPL 0.835 0.725 72.8 88.7 3.02e-02 3.26e-02 52.170 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: 40.128000 sec.
T50 in the 50-300 keV band: 14.720000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 75.756 -29.248 46.508
T90 45.276 -25.696 19.580
T50 16.368 -6.384 9.984
Peak 1.000 5.632 6.632
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
45.7841 +12.8257 0.0051 6.0 -126.5 2.6781 37.4 TRIG_00201391
------------------------------------------
Foreground time interval of the image:
-29.248 10.177 (delta_t = 39.425 [sec])
Background time interval of the image:
-299.824 -29.248 (delta_t = 270.576 [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 -29.248 sec. to 46.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87820 ( -8.503032E-02 8.596444E-02) )
Norm@50keV : 2.823703E-03 ( -1.309724E-04 1.299470E-04) )
------------------------------------------------------------
Chi-Squared = 49.21764 using 59 PHA bins.
Reduced chi-squared = 0.8634674 for 57 degrees of freedom
Null hypothesis probability = 0.759
Photon flux (15-150 keV) in 75.76 sec: 0.401533 ( -0.018192 0.018259 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96647e-06 ( -9.06165e-08 9.13363e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -29.248 sec. to 46.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49828 ( )
Epeak [keV] : 61.8990 ( -14.4270 9935.81 )
Norm@50keV : 4.453071E-03 ( -1.378386E-03 2.381665E-03) )
------------------------------------------------------------
Chi-Squared = 46.72834 using 59 PHA bins.
Reduced chi-squared = 0.8344347 for 56 degrees of freedom
Null hypothesis probability = 0.807
Photon flux (15-150 keV) in 75.76 sec: 0.392668 ( -0.020422 0.020415 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9057e-06 ( -1.12882e-07 1.10284e-07 ) ergs/cm2
Band function
Time interval is from -29.248 sec. to 46.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.22126 ( -0.537118 2.58686 )
beta : -2.08715 ( -7.91285 0.268881 )
Epeak [keV] : 48.0123 ( -24.4332 42.2350 )
Norm@50keV : 6.661820E-03 ( -6.661820E-03 13.3177 )
------------------------------------------------------------
Chi-Squared = 44.72575 using 59 PHA bins.
Reduced chi-squared = 0.8131955 for 55 degrees of freedom
Null hypothesis probability = 0.837
Photon flux (15-150 keV) in 75.76 sec: 0.388616 ( -0.020947 0.020734 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89697e-06 ( -1.06663e-07 1.01087e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 5.632 sec. to 6.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58485 ( -0.156786 0.159629 )
Norm@50keV : 1.198831E-02 ( -1.177290E-03 1.166065E-03) )
------------------------------------------------------------
Chi-Squared = 55.98911 using 59 PHA bins.
Reduced chi-squared = 0.9822651 for 57 degrees of freedom
Null hypothesis probability = 0.513
Photon flux (15-150 keV) in 1.000 sec: 1.53341 ( -0.14166 0.14176 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12333e-07 ( -1.1891e-08 1.2017e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.632 sec. to 6.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.834566 ( -0.788330 0.661211 )
Epeak [keV] : 72.7512 ( -17.8771 159.500 )
Norm@50keV : 3.020877E-02 ( -1.656945E-02 4.862547E-02) )
------------------------------------------------------------
Chi-Squared = 52.16964 using 59 PHA bins.
Reduced chi-squared = 0.9316007 for 56 degrees of freedom
Null hypothesis probability = 0.621
Photon flux (15-150 keV) in 1.000 sec: 1.49487 ( -0.14625 0.14606 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05587e-07 ( -1.31416e-08 1.3514e-08 ) ergs/cm2
Band function
Time interval is from 5.632 sec. to 6.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.621304 ( -0.758229 3.75897 )
beta : -2.10351 ( -7.89649 0.545118 )
Epeak [keV] : 62.0329 ( -38.2151 153.899 )
Norm@50keV : 4.130388E-02 ( -2.785611E-02 308.518 )
------------------------------------------------------------
Chi-Squared = 52.06699 using 59 PHA bins.
Reduced chi-squared = 0.9466726 for 55 degrees of freedom
Null hypothesis probability = 0.587
Photon flux (15-150 keV) in 1.000 sec: 1.49863 ( -0.14917 0.14626 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07746e-07 ( -1.46229e-08 1.3192e-08 ) ergs/cm2
Plot creation:
Mon Dec 31 14:08:07 EST 2007