batgrbproduct Analysis for Trigger=355536
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): Tue Jun 23 09:12:20 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355536/GCN5_download_cron
======================================================================
Trigger: 00355536 Segment: 000
BAT Trigger Time: 267414323.44 [s; MET]
Trigger Stop: 267414323.472 [s; MET]
UTC: 2009-06-23T01:45:18.590000 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 207.686764493045 Dec: 68.6678394959091 [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 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 207.686764493045 Dec: 68.6678394959091 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 207.695627771425 Dec: 68.6468075097474 [deg; J2000]
{ 13h 50m 47.0s , +68d 38' 48.5" }
+/- 3.39929373760797 [arcmin] (estimated 90% radius based on SNR)
+/- 1.63733252734367 [arcmin] (formal 1-sigma fit error)
SNR: 5.29653289653004
Angular difference between Flight and Ground position is 1.276675 arcmin
Partial Coding Fraction: 0.265625 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003250 0.007983 0.009809 -0.000067
0.001838 0.002630 0.002416 0.001752 [error]
Peak 0.003250 0.007983 0.009809 -0.000067
0.001838 0.002630 0.002416 0.001752 [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 6.40e-10 2.11e-10 3.90e-11 8.41e-12 8.95e-10 8.98e-10 erg/cm2
Error 7.69e-10 2.15e-10 6.77e-11 1.60e-09 9.78e-10 9.80e-10 erg/cm2
Peak flux Power-law 6.85e-01 1.30e-01 1.20e-02 1.20e-03 8.28e-01 8.28e-01 ph/cm2/s
Error 8.35e-01 1.32e-01 1.88e-02 1.72e-01 9.52e-01 9.52e-01 ph/cm2/s
Fluence Cutoff-PL 7.65e-10 5.04e-10 1.69e-11 1.29e-09 0.00e+00 0.00e+00 erg/cm2
Error 8.11e-10 4.64e-10 4.74e-11 1.25e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 7.41e-01 3.14e-01 6.08e-03 5.52e-07 1.07e+00 1.05e+00 ph/cm2/s
Error 8.36e-01 2.91e-01 1.41e-02 7.46e-04 1.10e+00 0.00e+00 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 4.436 0.000 - - 9.11e-04 1.07e-03 49.520 57
CPL 1.000 0.000 50.0 0.0 2.04e-03 0.00e+00 51.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.436 0.000 - - 9.11e-04 1.07e-03 49.520 57
CPL 1.000 0.000 50.0 0.0 2.04e-03 0.00e+00 51.060 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
207.6956 +68.6468 0.0363 48.9 179.8 0.0246 5.3 TRIG_00355536
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.440 -3.440 (delta_t = 57.000 [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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.43574 ( -4.43715 -4.43715 )
Norm@50keV : 9.11274E-04 ( -0.000909065 0.00122733 )
------------------------------------------------------------
# Chi-Squared = 49.52 using 59 PHA bins.
# Reduced chi-squared = 0.8688 for 57 degrees of freedom
# Null hypothesis probability = 7.487847e-01
Photon flux (15-150 keV) in 0.032 sec: 0.828375 ( -0.828375 1.07602 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.95414e-10 ( -8.95414e-10 1.06151e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.03805E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.06 using 59 PHA bins.
# Reduced chi-squared = 0.9118 for 56 degrees of freedom
# Null hypothesis probability = 6.618724e-01
Photon flux (15-150 keV) in 0.032 sec: 1.07373 ( -1.07373 1.13073 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.59451 ( 1.7454 1.7454 )
beta : -9.37167 ( 9.99986 9.99986 )
Epeak [keV] : 18.6603 ( -11.564 407.449 )
Norm@50keV : 15.2845 ( -15.2845 3957.72 )
------------------------------------------------------------
# Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8807 for 55 degrees of freedom
# Null hypothesis probability = 7.218260e-01
Photon flux (15-150 keV) in 0.032 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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.43574 ( -4.43715 -4.43715 )
Norm@50keV : 9.11274E-04 ( -0.000909065 0.00122733 )
------------------------------------------------------------
# Chi-Squared = 49.52 using 59 PHA bins.
# Reduced chi-squared = 0.8688 for 57 degrees of freedom
# Null hypothesis probability = 7.487847e-01
Photon flux (15-150 keV) in 0.032 sec: 0.828375 ( -0.828375 1.07602 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.95414e-10 ( -8.95414e-10 1.06151e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.03805E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.06 using 59 PHA bins.
# Reduced chi-squared = 0.9118 for 56 degrees of freedom
# Null hypothesis probability = 6.618724e-01
Photon flux (15-150 keV) in 0.032 sec: 1.07373 ( -1.07373 1.13073 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.59451 ( 1.7454 1.7454 )
beta : -9.37167 ( 9.99986 9.99986 )
Epeak [keV] : 18.6603 ( -11.564 407.449 )
Norm@50keV : 15.2845 ( -15.2845 3957.72 )
------------------------------------------------------------
# Chi-Squared = 48.44 using 59 PHA bins.
# Reduced chi-squared = 0.8807 for 55 degrees of freedom
# Null hypothesis probability = 7.218260e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Jun 23 09:26:47 EDT 2009