batgrbproduct Analysis for Trigger=215769
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): Tue Jan 1 18:42:07 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger215769/GCN5_download_cron
======================================================================
Trigger: 00215769 Segment: 000
BAT Trigger Time: 172771224 [s; MET]
Trigger Stop: 172771568 [s; MET]
UTC: 2006-06-23T16:00:22.726100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 166.120133780521 Dec: 38.2108432486265 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.56
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.56
Flight Position: [ source = BAT ]
RA: 166.120133780521 Dec: 38.2108432486265 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 165.806614614637 Dec: 38.0747799638358 [deg; J2000]
{ 11h 03m 13.6s , +38d 04' 29.2" }
+/- 12.8023595411542 [arcmin] (estimated 90% radius based on SNR)
+/- 13.3281672821725 [arcmin] (formal 1-sigma fit error)
SNR: 0.796664554193246
RA = 11h 3m 13.6s (165.806615 deg.)
Dec = 38d 4' 29" (38.074780 deg.)
Angular difference between Flight and Ground position is 16.897443 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
T50: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 344 second)
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003292 -0.139330 -0.223621 -0.182011
0.064292 0.065274 0.059326 0.056743 [error]
Peak 0.003292 -0.139330 -0.223621 -0.182011
0.064292 0.065274 0.059326 0.056743 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 8.61e-09 4.27e-09 5.01e-09 2.49e-07 1.38e-08 2.51e-07 erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 8.72e-04 2.31e-04 1.25e-04 1.72e-03 9.98e-04 4.11e-03 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 1.05e-08 6.64e-09 6.68e-09 2.81e-07 1.42e-08 4.43e-07 erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.07e-03 3.49e-04 1.72e-04 1.93e-03 1.13e-03 1.90e-03 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 5.79e-09 5.43e-09 6.50e-09 4.61e-08 1.32e-08 1.36e-07 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 9.27e-04 3.66e-04 1.62e-04 4.94e-03 1.01e-03 7.22e-03 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 4.11e-06 70.403 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 70.403 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 4.11e-06 70.403 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 5.00e+23 70.403 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 344.000 0.000 344.000
T90 344.000 0.000 344.000
T50 344.000 0.000 344.000
Peak 344.000 0.000 344.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
165.8066 +38.0748 0.2420 0.3 -131.4 0.5774 0.8 TRIG_00215769
------------------------------------------
Foreground time interval of the image:
0.000 344.000 (delta_t = 344.000 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 8.219428E-06) )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.235146 for 57 degrees of freedom
Null hypothesis probability = 0.109
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00199665 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.76838e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 1.000000E+24) )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.257202 for 56 degrees of freedom
Null hypothesis probability = 9.325E-02
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00226513 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.84671e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( 0.00000 14.0039 )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.280060 for 55 degrees of freedom
Null hypothesis probability = 7.889E-02
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00201478 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.64237e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 8.219428E-06) )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.235146 for 57 degrees of freedom
Null hypothesis probability = 0.109
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00199665 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.76838e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( 0.00000 1.000000E+24) )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.257202 for 56 degrees of freedom
Null hypothesis probability = 9.325E-02
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00226513 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.84671e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( 0.00000 14.0039 )
------------------------------------------------------------
Chi-Squared = 70.40330 using 59 PHA bins.
Reduced chi-squared = 1.280060 for 55 degrees of freedom
Null hypothesis probability = 7.889E-02
Photon flux (15-150 keV) in 344.0 sec: 0.00000 ( 0 0.00201478 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 2.64237e-08 ) ergs/cm2
Plot creation:
Tue Jan 1 18:58:19 EST 2008