batgrbproduct Analysis for Trigger=352188
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 v2.44
Process Start Time (local time): Sat May 16 21:07:46 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger352188/GCN5_download_cron
======================================================================
Trigger: 00352188 Segment: 000
BAT Trigger Time: 264147616.928 [s; MET]
Trigger Stop: 264147616.992 [s; MET]
UTC: 2009-05-16T06:20:12.182660 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 98.4746868346953 Dec: 19.446673411715 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.78
Image Trigger?: NO
Rate S/N Ratio: 6.16441400296898 [ if not an image trigger ]
Image S/N Ratio: 5.78
Flight Position: [ source = BAT ]
RA: 98.4746868346953 Dec: 19.446673411715 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 98.4796473483098 Dec: 19.5042750195953 [deg; J2000]
{ 06h 33m 55.1s , +19d 30' 15.4" }
+/- 3.92077029233634 [arcmin] (estimated 90% radius based on SNR)
+/- 2.14564179018855 [arcmin] (formal 1-sigma fit error)
SNR: 4.3196141289609
Angular difference between Flight and Ground position is 3.467469 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.012153 -0.000832 0.002224 -0.001213
0.002477 0.001864 0.001762 0.001689 [error]
Peak 0.012153 -0.000832 0.002224 -0.001213
0.002477 0.001864 0.001762 0.001689 [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 2.20e-09 1.08e-09 3.23e-10 1.23e-10 3.67e-09 3.72e-09 erg/cm2
Error 1.23e-09 8.76e-10 3.67e-10 2.58e-10 1.98e-09 2.04e-09 erg/cm2
Peak flux Power-law 1.16e+00 3.24e-01 4.86e-02 8.29e-03 1.54e+00 1.54e+00 ph/cm2/s
Error 6.60e-01 2.60e-01 5.39e-02 1.61e-02 1.17e+00 1.18e+00 ph/cm2/s
Fluence Cutoff-PL 2.21e-09 2.93e-09 7.22e-10 3.09e-12 7.27e-18 3.67e-09 erg/cm2
Error 7.53e-10 7.78e-11 2.88e-12 1.76e-09 2.22e-09 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.16e+00 3.24e-01 4.85e-02 8.23e-03 1.54e+00 1.54e+00 ph/cm2/s
Error 6.60e-01 2.60e-01 5.39e-02 1.60e-02 1.17e+00 1.18e+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 3.737 1.263 - - 3.13e-03 3.01e-03 58.700 57
CPL 1.000 0.000 50.0 0.0 7.01e-03 0.00e+00 65.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.737 1.263 - - 3.13e-03 3.01e-03 58.700 57
CPL 1.000 0.000 50.0 0.0 7.01e-03 0.00e+00 65.740 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
98.4796 +19.5043 0.0446 41.5 -16.8 0.0165 4.3 TRIG_00352188
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-24.527 -8.928 (delta_t = 15.599 [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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.73730 ( -0.885976 1.6391 )
Norm@50keV : 3.12691E-03 ( -0.00312682 0.00289699 )
------------------------------------------------------------
# Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.130359e-01
Photon flux (15-150 keV) in 0.064 sec: 1.53897 ( -1.53897 0.810626 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6676e-09 ( -1.98719e-09 1.97797e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.01397E-03 ( )
------------------------------------------------------------
# Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 56 degrees of freedom
# Null hypothesis probability = 1.751406e-01
Photon flux (15-150 keV) in 0.064 sec: 1.53839 ( -1.53839 0.81026 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.67071e-09 ( -1.73538e-09 1.7898e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.67338 ( 1.05987 1.05987 )
beta : -9.37167 ( 4.81015 13.5191 )
Epeak [keV] : 14.1592 ( -6.65468 14.9418 )
Norm@50keV : 1172.93 ( -1172.93 118552 )
------------------------------------------------------------
# Chi-Squared = 56.23 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.285193e-01
Photon flux (15-150 keV) in 0.064 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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.73730 ( -0.885976 1.6391 )
Norm@50keV : 3.12691E-03 ( -0.00312682 0.00289699 )
------------------------------------------------------------
# Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.130359e-01
Photon flux (15-150 keV) in 0.064 sec: 1.53897 ( -1.53897 0.810626 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6676e-09 ( -1.98719e-09 1.97797e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.01397E-03 ( )
------------------------------------------------------------
# Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 56 degrees of freedom
# Null hypothesis probability = 1.751406e-01
Photon flux (15-150 keV) in 0.064 sec: 1.53839 ( -1.53839 0.81026 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.67071e-09 ( -1.73538e-09 1.7898e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.67338 ( 1.05987 1.05987 )
beta : -9.37167 ( 4.81015 13.5191 )
Epeak [keV] : 14.1592 ( -6.65468 14.9418 )
Norm@50keV : 1172.93 ( -1172.93 118552 )
------------------------------------------------------------
# Chi-Squared = 56.23 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.285193e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat May 16 21:22:05 EDT 2009