batgrbproduct Analysis for Trigger=356412
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): Sun Jul 5 02:13:26 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356412/GCN5_download_cron
======================================================================
Trigger: 00356412 Segment: 000
BAT Trigger Time: 268396550.464 [s; MET]
Trigger Stop: 268396554.56 [s; MET]
UTC: 2009-07-04T10:35:45.582160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 292.142857014799 Dec: -6.12042911919325 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.66
Image Trigger?: NO
Rate S/N Ratio: 7.93725393319377 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 292.142857014799 Dec: -6.12042911919325 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 292.193205100718 Dec: -6.1186361700494 [deg; J2000]
{ 19h 28m 46.4s , -06d 07' 07.1" }
+/- 4.44685791132295 [arcmin] (estimated 90% radius based on SNR)
+/- 2.84257912933408 [arcmin] (formal 1-sigma fit error)
SNR: 3.60851087769982
Angular difference between Flight and Ground position is 3.005597 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 4.09600001573563 +/-
Measured from: 0
to: 4.09600001573563 [s; relative to TRIGTIME]
T50: 4.09600001573563 +/-
Measured from: 0
to: 4.09600001573563 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 4.09600001573563 second)
Measured from: 0
to: 4.09600001573563 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 4.09600001573563 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.060755 0.018233 -0.002585 0.009190
0.012693 0.011195 0.009848 0.009116 [error]
Peak 0.060755 0.018233 -0.002585 0.009190
0.012693 0.011195 0.009848 0.009116 [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 1.20e-08 8.52e-09 4.00e-09 2.64e-09 2.57e-08 2.73e-08 erg/cm2
Error 5.29e-09 5.07e-09 5.16e-09 7.34e-09 1.39e-08 1.74e-08 erg/cm2
Peak flux Power-law 9.75e-02 3.91e-02 9.18e-03 2.61e-03 1.47e-01 1.48e-01 ph/cm2/s
Error 4.37e-02 2.23e-02 1.15e-02 6.57e-03 6.31e-02 6.35e-02 ph/cm2/s
Fluence Cutoff-PL 1.20e-08 8.52e-09 4.00e-09 2.62e-09 2.57e-08 2.71e-08 erg/cm2
Error 5.29e-09 5.07e-09 5.16e-09 7.27e-09 1.39e-08 1.74e-08 erg/cm2
Peak flux Cutoff-PL 1.06e-01 4.40e-02 8.57e-04 7.83e-08 1.50e-01 1.51e-01 ph/cm2/s
Error 4.69e-02 2.89e-02 6.20e-03 8.76e-04 5.84e-02 5.84e-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 0.00e+00 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 3.077 1.081 - - 5.07e-04 5.09e-04 73.010 57
CPL 1.000 0.000 50.0 0.0 2.61e-03 0.00e+00 78.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.077 1.081 - - 5.07e-04 5.09e-04 73.010 57
CPL 1.000 0.000 50.0 0.0 2.61e-03 0.00e+00 78.610 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 4.096 0.000 4.096
T90 4.096 0.000 4.096
T50 4.096 0.000 4.096
Peak 4.096 0.000 4.096
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
292.1932 -6.1186 0.0533 10.5 48.9 0.0756 3.6 TRIG_00356412
------------------------------------------
Foreground time interval of the image:
0.000 4.096 (delta_t = 4.096 [sec])
Background time interval of the image:
-60.464 -14.464 (delta_t = 46.000 [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.
- 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 4.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.07690 ( -0.894385 1.26755 )
Norm@50keV : 5.06723E-04 ( -0.000505334 0.00051281 )
------------------------------------------------------------
# Chi-Squared = 73.01 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 57 degrees of freedom
# Null hypothesis probability = 7.495532e-02
Photon flux (15-150 keV) in 4.096 sec: 0.147280 ( -0.0627841 0.0634219 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57495e-08 ( -1.24181e-08 1.5366e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.60631E-03 ( )
------------------------------------------------------------
# Chi-Squared = 78.61 using 59 PHA bins.
# Reduced chi-squared = 1.404 for 56 degrees of freedom
# Null hypothesis probability = 2.479522e-02
Photon flux (15-150 keV) in 4.096 sec: 0.150483 ( -0.0583652 0.058373 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57495e-08 ( -1.2464e-08 1.53579e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.97302 ( 1.658 1.658 )
beta : -9.37167 ( 150.92 160.92 )
Epeak [keV] : 21.4150 ( -3.97182 13.0096 )
Norm@50keV : 108.023 ( -107.976 1820.41 )
------------------------------------------------------------
# Chi-Squared = 70.27 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 55 degrees of freedom
# Null hypothesis probability = 8.054657e-02
Photon flux (15-150 keV) in 4.096 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 4.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.07690 ( -0.894385 1.26755 )
Norm@50keV : 5.06723E-04 ( -0.000505334 0.00051281 )
------------------------------------------------------------
# Chi-Squared = 73.01 using 59 PHA bins.
# Reduced chi-squared = 1.281 for 57 degrees of freedom
# Null hypothesis probability = 7.495532e-02
Photon flux (15-150 keV) in 4.096 sec: 0.147280 ( -0.0627841 0.0634219 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57495e-08 ( -1.24181e-08 1.5366e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.60631E-03 ( )
------------------------------------------------------------
# Chi-Squared = 78.61 using 59 PHA bins.
# Reduced chi-squared = 1.404 for 56 degrees of freedom
# Null hypothesis probability = 2.479522e-02
Photon flux (15-150 keV) in 4.096 sec: 0.150483 ( -0.0583652 0.058373 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57495e-08 ( -1.2464e-08 1.53579e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.17071 ( 1.658 1.658 )
beta : -9.97819 ( 150.92 160.92 )
Epeak [keV] : 21.3445 ( -6.50686 20.5847 )
Norm@50keV : 160.036 ( -160.038 1738.48 )
------------------------------------------------------------
# Chi-Squared = 70.25 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.071061e-02
Photon flux (15-150 keV) in 4.096 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jul 5 02:27:01 EDT 2009