batgrbproduct Analysis for Trigger=360337
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): Wed Aug 19 21:22:42 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360337/GCN5_download_cron
======================================================================
Trigger: 00360337 Segment: 000
BAT Trigger Time: 272364042.816 [s; MET]
Trigger Stop: 272364043.84 [s; MET]
UTC: 2009-08-19T08:40:37.805380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 82.5737024010444 Dec: -19.0365249894599 [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: 20.8326666559997 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 82.5737024010444 Dec: -19.0365249894599 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 82.5028708545529 Dec: -19.0786324141854 [deg; J2000]
{ 05h 30m 00.7s , -19d 04' 43.1" }
+/- 4.33477000538264 [arcmin] (estimated 90% radius based on SNR)
+/- 2.76592373924348 [arcmin] (formal 1-sigma fit error)
SNR: 3.7425435809381
Angular difference between Flight and Ground position is 4.745408 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: -2.98023223876953e-08
to: 1.02399995923042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001139 0.010497 0.015659 0.040492
0.011053 0.008476 0.007476 0.008893 [error]
Peak 0.001139 0.010497 0.015659 0.040492
0.011053 0.008476 0.007476 0.008893 [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 1.84e-11 3.10e-10 4.86e-09 7.45e-07 2.60e-08 7.51e-07 erg/cm2
Error 6.86e-10 2.63e-09 9.49e-09 5.80e-07 3.07e-08 5.86e-07 erg/cm2
Peak flux Power-law 5.38e-04 4.71e-03 3.69e-02 1.71e+00 1.41e-01 1.75e+00 ph/cm2/s
Error 2.11e-02 4.33e-02 7.69e-02 1.35e+00 2.07e-01 1.39e+00 ph/cm2/s
Fluence Cutoff-PL 1.30e-11 2.49e-10 4.42e-09 8.35e-07 2.52e-08 6.53e-07 erg/cm2
Error 6.50e-10 2.56e-09 9.41e-09 5.11e-07 3.05e-08 7.06e-07 erg/cm2
Peak flux Cutoff-PL 3.80e-04 3.75e-03 3.34e-02 1.89e+00 1.35e-01 1.93e+00 ph/cm2/s
Error 1.99e-02 4.20e-02 7.61e-02 1.18e+00 2.05e-01 1.22e+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 -1.970 0.380 - - 3.30e-04 0.00e+00 69.960 57
CPL -0.994 0.404 10000.0 0.0 1.31e-03 1.94e-03 71.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.970 0.380 - - 3.30e-04 0.00e+00 69.960 57
CPL -0.994 0.404 10000.0 0.0 1.31e-03 1.94e-03 71.240 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
82.5029 -19.0786 0.0511 25.1 -4.3 0.0698 3.7 TRIG_00360337
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-27.715 -10.816 (delta_t = 16.899 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.96993 ( 1.16505 1.92505 )
Norm@50keV : 3.29529E-04 ( )
------------------------------------------------------------
# Chi-Squared = 69.96 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 57 degrees of freedom
# Null hypothesis probability = 1.162858e-01
Photon flux (15-150 keV) in 1.024 sec: 0.140984 ( -0.140984 0.27314 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59775e-08 ( -2.59775e-08 3.53403e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.993619 ( 0.568754 1.37579 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 1.31190E-03 ( -0.00130144 0.00258494 )
------------------------------------------------------------
# Chi-Squared = 71.24 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 56 degrees of freedom
# Null hypothesis probability = 8.247956e-02
Photon flux (15-150 keV) in 1.024 sec: 0.134671 ( -0.134671 0.274987 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51826e-08 ( -2.51826e-08 3.58028e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.621343 ( -0.621343 -0.621343 )
beta : 1.96986 ( -2.32945 0.873117 )
Epeak [keV] : 8.22095 ( -8.22095 -8.22095 )
Norm@50keV : 1.53686E-03 ( -0.00153686 24065.9 )
------------------------------------------------------------
# Chi-Squared = 69.95 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.445784e-02
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.96993 ( 1.16505 1.92505 )
Norm@50keV : 3.29529E-04 ( )
------------------------------------------------------------
# Chi-Squared = 69.96 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 57 degrees of freedom
# Null hypothesis probability = 1.162858e-01
Photon flux (15-150 keV) in 1.024 sec: 0.140984 ( -0.140984 0.27314 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59775e-08 ( -2.59775e-08 3.53403e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.993619 ( 0.568754 1.37579 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 1.31190E-03 ( -0.00130144 0.00258494 )
------------------------------------------------------------
# Chi-Squared = 71.24 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 56 degrees of freedom
# Null hypothesis probability = 8.247956e-02
Photon flux (15-150 keV) in 1.024 sec: 0.134671 ( -0.134671 0.274987 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51826e-08 ( -2.51826e-08 3.58028e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.621343 ( -0.621343 -0.621343 )
beta : 1.96986 ( -2.32945 0.873117 )
Epeak [keV] : 8.22095 ( -8.22095 -8.22095 )
Norm@50keV : 1.53686E-03 ( -0.00153686 24065.9 )
------------------------------------------------------------
# Chi-Squared = 69.95 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.445784e-02
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Aug 19 21:41:28 EDT 2009