batgrbproduct Analysis for Trigger=362917
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): Mon Sep 21 06:47:25 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362917/GCN5_download_cron
======================================================================
Trigger: 00362917 Segment: 000
BAT Trigger Time: 275164962.368 [s; MET]
Trigger Stop: 275164962.432 [s; MET]
UTC: 2009-09-20T18:42:37.265720 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 155.690408080696 Dec: 15.7734538619811 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.73
Image Trigger?: NO
Rate S/N Ratio: 31.2089730686545 [ if not an image trigger ]
Image S/N Ratio: 5.73
Flight Position: [ source = BAT ]
RA: 155.690408080696 Dec: 15.7734538619811 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 155.645778029257 Dec: 15.8011824534361 [deg; J2000]
{ 10h 22m 35.0s , +15d 48' 04.3" }
+/- 3.89349460405047 [arcmin] (estimated 90% radius based on SNR)
+/- 2.22723523967867 [arcmin] (formal 1-sigma fit error)
SNR: 4.36290872067204
Angular difference between Flight and Ground position is 3.067214 arcmin
Partial Coding Fraction: 0.3710938 [ 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 0.000811 0.007251 0.007781 0.001191
0.002494 0.002618 0.002183 0.002335 [error]
Peak 0.000811 0.007251 0.007781 0.001191
0.002494 0.002618 0.002183 0.002335 [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 6.55e-10 7.03e-10 5.35e-10 6.66e-10 2.14e-09 2.56e-09 erg/cm2
Error 8.86e-10 8.47e-10 7.13e-10 1.49e-09 2.59e-09 3.25e-09 erg/cm2
Peak flux Power-law 3.36e-01 2.01e-01 7.65e-02 3.89e-02 6.34e-01 6.53e-01 ph/cm2/s
Error 4.59e-01 2.42e-01 1.01e-01 7.86e-02 7.75e-01 7.95e-01 ph/cm2/s
Fluence Cutoff-PL 5.21e-10 2.42e-09 2.49e-09 2.63e-10 5.67e-09 5.64e-09 erg/cm2
Error 5.53e-10 1.48e-09 1.68e-09 2.75e-10 3.30e-09 3.32e-09 erg/cm2
Peak flux Cutoff-PL 2.44e-01 6.42e-01 3.72e-01 2.27e-02 1.28e+00 1.28e+00 ph/cm2/s
Error 2.71e-01 4.01e-01 2.43e-01 2.79e-02 7.55e-01 7.54e-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 1.58e-01 6.39e-01 4.66e-01 1.28e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.45e-01 3.81e-01 2.58e-01 7.02e-01 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 2.393 0.000 - - 3.44e-03 4.26e-03 55.200 57
CPL -4.975 0.000 55.3 11.2 1.34e+01 1.07e+01 46.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.393 0.000 - - 3.44e-03 4.26e-03 55.200 57
CPL -4.975 0.000 55.3 11.2 1.34e+01 1.07e+01 46.560 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
155.6458 +15.8012 0.0439 40.5 -42.0 0.0209 4.4 TRIG_00362917
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-38.467 -2.368 (delta_t = 36.099 [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: 2.39332 ( -2.39126 -2.39126 )
Norm@50keV : 3.44245E-03 ( -0.00344199 0.00506862 )
------------------------------------------------------------
# Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9685 for 57 degrees of freedom
# Null hypothesis probability = 5.427813e-01
Photon flux (15-150 keV) in 0.064 sec: 0.633759 ( -0.633759 0.915351 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14482e-09 ( -2.1449e-09 3.02704e-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: -4.97493 ( )
Epeak [keV] : 55.2973 ( -10.996 11.3233 )
Norm@50keV : 13.3553 ( -13.3202 8.10901 )
------------------------------------------------------------
# Chi-Squared = 46.56 using 59 PHA bins.
# Reduced chi-squared = 0.8314 for 56 degrees of freedom
# Null hypothesis probability = 8.116538e-01
Photon flux (15-150 keV) in 0.064 sec: 1.27896 ( -0.748726 0.76039 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.67071e-09 ( -3.30091e-09 3.29217e-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 : 4.99973 ( -6980.73 -6965.74 )
beta : -9.99812 ( 1688.57 1698.21 )
Epeak [keV] : 55.1272 ( -10.8 11.5474 )
Norm@50keV : 13.9189 ( -13.9189 39.1021 )
------------------------------------------------------------
# Chi-Squared = 46.57 using 59 PHA bins.
# Reduced chi-squared = 0.8468 for 55 degrees of freedom
# Null hypothesis probability = 7.835624e-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: 2.39332 ( -2.39126 -2.39126 )
Norm@50keV : 3.44245E-03 ( -0.00344199 0.00506862 )
------------------------------------------------------------
# Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9685 for 57 degrees of freedom
# Null hypothesis probability = 5.427813e-01
Photon flux (15-150 keV) in 0.064 sec: 0.633759 ( -0.633759 0.915351 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14482e-09 ( -2.1449e-09 3.02704e-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: -4.97493 ( )
Epeak [keV] : 55.2973 ( -10.996 11.3233 )
Norm@50keV : 13.3553 ( -13.3202 8.10901 )
------------------------------------------------------------
# Chi-Squared = 46.56 using 59 PHA bins.
# Reduced chi-squared = 0.8314 for 56 degrees of freedom
# Null hypothesis probability = 8.116538e-01
Photon flux (15-150 keV) in 0.064 sec: 1.27896 ( -0.748726 0.76039 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.67071e-09 ( -3.30091e-09 3.29217e-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 : 4.99973 ( -6980.73 -6965.74 )
beta : -9.99812 ( 1688.57 1698.21 )
Epeak [keV] : 55.1272 ( -10.8 11.5474 )
Norm@50keV : 13.9189 ( -13.9189 39.1021 )
------------------------------------------------------------
# Chi-Squared = 46.57 using 59 PHA bins.
# Reduced chi-squared = 0.8468 for 55 degrees of freedom
# Null hypothesis probability = 7.835624e-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:
Mon Sep 21 06:57:46 EDT 2009