batgrbproduct Analysis for Trigger=382159
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 v2.45
Process Start Time (local time): Fri Jan 8 13:10:35 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger382159/GCN5_download_cron
======================================================================
Trigger: 00382159 Segment: 000
BAT Trigger Time: 284597184 [s; MET]
Trigger Stop: 284597880 [s; MET]
UTC: 2010-01-07T22:46:18.581560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.186248426128 Dec: -22.698667039989 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 19.94
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.94
Flight Position: [ source = BAT ]
RA: 268.186248426128 Dec: -22.698667039989 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.067819908383 Dec: -22.5307980884607 [deg; J2000]
{ 17h 52m 16.3s , -22d 31' 50.9" }
+/- 2.28820381485764 [arcmin] (estimated 90% radius based on SNR)
+/- 5.0134338984161 [arcmin] (formal 1-sigma fit error)
SNR: 9.32297490573114
Angular difference between Flight and Ground position is 12.019698 arcmin
Partial Coding Fraction: 0.3398438 [ including projection effects ]
Duration
T90: 696 +/-
Measured from: 0
to: 696 [s; relative to TRIGTIME]
T50: 696 +/-
Measured from: 0
to: 696 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 696 second)
Measured from: 0
to: 696 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 696 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.973373 0.135484 0.546565 0.268192
0.298596 0.268529 0.225043 0.187069 [error]
Peak 0.973373 0.135484 0.546565 0.268192
0.298596 0.268529 0.225043 0.187069 [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 2.40e-07 2.40e-07 1.68e-07 1.87e-07 7.23e-07 8.37e-07 erg/cm2
Error 1.96e-07 1.87e-07 2.15e-07 7.57e-07 4.82e-07 9.87e-07 erg/cm2
Peak flux Power-law 1.14e-02 6.34e-03 2.22e-03 1.02e-03 2.05e-02 2.10e-02 ph/cm2/s
Error 9.39e-03 3.72e-03 2.74e-03 3.52e-03 9.86e-03 1.02e-02 ph/cm2/s
Fluence Cutoff-PL 2.41e-07 2.40e-07 1.68e-07 1.85e-07 7.23e-07 8.34e-07 erg/cm2
Error 1.96e-07 1.88e-07 2.15e-07 7.50e-07 4.82e-07 9.80e-07 erg/cm2
Peak flux Cutoff-PL 1.14e-02 6.34e-03 2.22e-03 1.01e-03 2.05e-02 2.10e-02 ph/cm2/s
Error 9.39e-03 3.73e-03 2.74e-03 3.49e-03 9.86e-03 1.02e-02 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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 Band 2.85e-02 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.501 1.554 - - 1.04e-04 9.85e-05 62.180 57
CPL 1.791 0.000 23.5 0.0 2.00e-04 0.00e+00 62.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.501 1.554 - - 1.04e-04 9.85e-05 62.180 57
CPL 1.791 0.000 23.5 0.0 2.00e-04 0.00e+00 62.930 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 696.000 0.000 696.000
T90 696.000 0.000 696.000
T50 696.000 0.000 696.000
Peak 696.000 0.000 696.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.0678 -22.5308 0.0205 31.9 -80.8 8.0402 9.3 TRIG_00382159
------------------------------------------
Foreground time interval of the image:
0.000 696.000 (delta_t = 696.000 [sec])
Background time interval of the image:
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.
- 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 696.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.50073 ( -1.31646 1.79143 )
Norm@50keV : 1.03852E-04 ( -0.000103663 9.33955e-05 )
------------------------------------------------------------
# Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.968871e-01
Photon flux (15-150 keV) in 696 sec: 2.05036E-02 ( -0.00985289 0.00986728 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.23304e-07 ( -4.24028e-07 5.40869e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 696.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79078 ( )
Epeak [keV] : 23.4767 ( )
Norm@50keV : 2.00046E-04 ( )
------------------------------------------------------------
# Chi-Squared = 62.93 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 56 degrees of freedom
# Null hypothesis probability = 2.445630e-01
Photon flux (15-150 keV) in 696 sec: 2.04917E-02 ( -0.0098666 0.0098617 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22615e-07 ( -4.23751e-07 5.40945e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 696.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.34779 ( 1.57262 1.57262 )
beta : -9.36979 ( 2.71623 2.39268 )
Epeak [keV] : 19.4651 ( -9.49534 -9.49534 )
Norm@50keV : 54.4227 ( -54.7141 3153.45 )
------------------------------------------------------------
# Chi-Squared = 61.30 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Null hypothesis probability = 2.604468e-01
Photon flux (15-150 keV) in 696 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 696.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.50073 ( -1.31646 1.79143 )
Norm@50keV : 1.03852E-04 ( -0.000103663 9.33955e-05 )
------------------------------------------------------------
# Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.968871e-01
Photon flux (15-150 keV) in 696 sec: 2.05036E-02 ( -0.00985289 0.00986728 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.23304e-07 ( -4.24028e-07 5.40869e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 696.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79078 ( )
Epeak [keV] : 23.4767 ( )
Norm@50keV : 2.00046E-04 ( )
------------------------------------------------------------
# Chi-Squared = 62.93 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 56 degrees of freedom
# Null hypothesis probability = 2.445630e-01
Photon flux (15-150 keV) in 696 sec: 2.04917E-02 ( -0.0098666 0.0098617 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22615e-07 ( -4.23751e-07 5.40945e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 696.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.34779 ( 1.57262 1.57262 )
beta : -9.36979 ( 2.71623 2.39268 )
Epeak [keV] : 19.4651 ( -9.49534 -9.49534 )
Norm@50keV : 54.4227 ( -54.7141 3153.45 )
------------------------------------------------------------
# Chi-Squared = 61.30 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Null hypothesis probability = 2.604468e-01
Photon flux (15-150 keV) in 696 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Jan 8 13:27:40 EST 2010