batgrbproduct Analysis for Trigger=354634
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 Jun 12 03:48:11 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354634/GCN5_download_cron
======================================================================
Trigger: 00354634 Segment: 000
BAT Trigger Time: 266442449.504 [s; MET]
Trigger Stop: 266442449.536 [s; MET]
UTC: 2009-06-11T19:47:24.685220 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 116.916809329382 Dec: 73.4845030013502 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.63
Image Trigger?: NO
Rate S/N Ratio: 6.557438524302 [ if not an image trigger ]
Image S/N Ratio: 5.63
Flight Position: [ source = BAT ]
RA: 116.916809329382 Dec: 73.4845030013502 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 117.055009151407 Dec: 73.4374260098876 [deg; J2000]
{ 07h 48m 13.2s , +73d 26' 14.7" }
+/- 4.23529542803551 [arcmin] (estimated 90% radius based on SNR)
+/- 2.81808334814512 [arcmin] (formal 1-sigma fit error)
SNR: 3.86874605641561
Angular difference between Flight and Ground position is 3.681069 arcmin
Partial Coding Fraction: 1 [ 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 0.000670 0.004356 0.003096 -0.001491
0.000947 0.001005 0.001020 0.001099 [error]
Peak 0.000670 0.004356 0.003096 -0.001491
0.000947 0.001005 0.001020 0.001099 [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 5.02e-10 8.70e-10 1.15e-09 3.09e-09 3.36e-09 5.68e-09 erg/cm2
Error 2.70e-10 3.60e-10 5.87e-10 3.34e-09 1.50e-09 3.56e-09 erg/cm2
Peak flux Power-law 5.07e-01 4.82e-01 3.18e-01 3.26e-01 1.44e+00 1.64e+00 ph/cm2/s
Error 2.76e-01 2.01e-01 1.59e-01 2.81e-01 5.96e-01 6.86e-01 ph/cm2/s
Fluence Cutoff-PL 3.42e-10 1.33e-09 1.37e-09 3.23e-09 0.00e+00 0.00e+00 erg/cm2
Error 3.29e-10 5.31e-10 9.89e-10 1.67e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.30e-01 7.15e-01 4.03e-01 3.19e-02 1.48e+00 1.48e+00 ph/cm2/s
Error 2.64e-01 2.91e-01 2.76e-01 1.09e-01 5.69e-01 5.74e-01 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 1.53e+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 1.588 0.543 - - 1.13e-02 4.85e-03 49.990 57
CPL -1.650 0.802 53.0 25.8 6.12e-01 2.57e+01 44.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.588 0.543 - - 1.13e-02 4.85e-03 49.990 57
CPL -1.650 0.802 53.0 25.8 6.12e-01 2.57e+01 44.320 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
117.0550 +73.4374 0.0498 7.8 54.5 0.0077 3.9 TRIG_00354634
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.504 -1.504 (delta_t = 59.000 [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: 1.58760 ( -0.518998 0.567051 )
Norm@50keV : 1.12544E-02 ( -0.00488911 0.00480325 )
------------------------------------------------------------
# Chi-Squared = 49.99 using 59 PHA bins.
# Reduced chi-squared = 0.8770 for 57 degrees of freedom
# Null hypothesis probability = 7.331561e-01
Photon flux (15-150 keV) in 0.032 sec: 1.44153 ( -0.595972 0.596444 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35741e-09 ( -1.45283e-09 1.54e-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: -1.64964 ( 1.69472 3.29795 )
Epeak [keV] : 52.9697 ( -18.7503 32.8756 )
Norm@50keV : 0.611759 ( -0.737424 50.5729 )
------------------------------------------------------------
# Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.7915 for 56 degrees of freedom
# Null hypothesis probability = 8.700755e-01
Photon flux (15-150 keV) in 0.032 sec: 1.47884 ( -0.550279 0.58844 ) 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 : 1.79259 ( -2.8772 -2.07498 )
beta : -9.99992 ( 40696.5 40706.5 )
Epeak [keV] : 52.3552 ( -18.6952 32.7226 )
Norm@50keV : 0.738871 ( -0.737936 26.3521 )
------------------------------------------------------------
# Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.8058 for 55 degrees of freedom
# Null hypothesis probability = 8.481170e-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: 1.58760 ( -0.518998 0.567051 )
Norm@50keV : 1.12544E-02 ( -0.00488911 0.00480325 )
------------------------------------------------------------
# Chi-Squared = 49.99 using 59 PHA bins.
# Reduced chi-squared = 0.8770 for 57 degrees of freedom
# Null hypothesis probability = 7.331561e-01
Photon flux (15-150 keV) in 0.032 sec: 1.44153 ( -0.595972 0.596444 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35741e-09 ( -1.45283e-09 1.54e-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: -1.64964 ( 1.69472 3.29795 )
Epeak [keV] : 52.9697 ( -18.7503 32.8756 )
Norm@50keV : 0.611759 ( -0.737424 50.5729 )
------------------------------------------------------------
# Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.7915 for 56 degrees of freedom
# Null hypothesis probability = 8.700755e-01
Photon flux (15-150 keV) in 0.032 sec: 1.47884 ( -0.550279 0.58844 ) 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 : 1.79259 ( -2.8772 -2.07498 )
beta : -9.99992 ( 40696.5 40706.5 )
Epeak [keV] : 52.3552 ( -18.6952 32.7226 )
Norm@50keV : 0.738871 ( -0.737936 26.3521 )
------------------------------------------------------------
# Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.8058 for 55 degrees of freedom
# Null hypothesis probability = 8.481170e-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:
Fri Jun 12 03:55:43 EDT 2009