batgrbproduct Analysis for Trigger=356634
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 Jul 8 03:06:01 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356634/GCN5_download_cron
======================================================================
Trigger: 00356634 Segment: 000
BAT Trigger Time: 268663365.888 [s; MET]
Trigger Stop: 268663392.768 [s; MET]
UTC: 2009-07-07T12:42:40.997520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 279.997966646457 Dec: 58.0334008723801 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.6
Image Trigger?: NO
Rate S/N Ratio: 11.4455231422596 [ if not an image trigger ]
Image S/N Ratio: 5.6
Flight Position: [ source = BAT ]
RA: 279.997966646457 Dec: 58.0334008723801 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: Dec: [deg; J2000]
{ 00h 00m 00.0s , +00d 00' 00.0" }
+/- inf [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR:
Angular difference between Flight and Ground position is 5083.572373 arcmin
Partial Coding Fraction: 0 [ including projection effects ]
Duration
T90: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
T50: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 26.8799999952316 second)
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 [error]
Peak 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 9.44e-07 1.00e-06 2.23e-06 8.96e-05 6.62e-06 9.09e-05 erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.25e+00 6.82e-01 7.26e-01 8.43e+00 2.11e+00 8.89e+00 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 9.78e-07 1.34e-06 2.81e-06 1.01e-04 6.94e-06 1.02e-04 erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.26e+00 8.98e-01 9.22e-01 9.41e+00 2.10e+00 9.83e+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 1.500 0.000 - - 0.00e+00 1.78e-02 0.000 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 9.36e+02 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 0.000 - - 0.00e+00 1.78e-02 0.000 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 9.36e+02 0.000 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 26.880 0.000 26.880
T90 26.880 0.000 26.880
T50 26.880 0.000 26.880
Peak 26.880 0.000 26.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
------------------------------------------
--> command terminated with status 0
Foreground time interval of the image:
0.000 13.152 (delta_t = 13.152 [sec])
14.112 26.880 (delta_t = 12.768 [sec])
Background time interval of the image:
-60.888 -57.561 (delta_t = 3.327 [sec])
-56.888 -45.888 (delta_t = 11.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 13.152000
14.112000 26.880000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.0356016 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 57 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 sec: 0.0 ( 0 4.22375 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.32438e-05 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 13.152000
14.112000 26.880000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -1 -1 )
Epeak [keV] : 50.0000 ( -50 -50 )
Norm@50keV : 0.0 ( 0 1871.67 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 56 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 sec: 0.0 ( 0 4.20921 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.38873e-05 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 13.152000
14.112000 26.880000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( 0.98395 0.98395 )
beta : -2.50000 ( 2.5 2.5 )
Epeak [keV] : 80.0000 ( -80 -80 )
Norm@50keV : 0.0 ( 0 3.35913e+06 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 55 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 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 14.112 sec. to 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.0356016 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 57 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 sec: 0.0 ( 0 4.22375 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.32438e-05 ) ergs/cm2
Cutoff power-law model
Time interval is from 14.112 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -1 -1 )
Epeak [keV] : 50.0000 ( -50 -50 )
Norm@50keV : 0.0 ( 0 1871.67 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 56 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 sec: 0.0 ( 0 4.20921 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 1.38873e-05 ) ergs/cm2
Band function
Time interval is from 14.112 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( 0.98395 0.98395 )
beta : -2.50000 ( 2.5 2.5 )
Epeak [keV] : 80.0000 ( -80 -80 )
Norm@50keV : 0.0 ( 0 3.35913e+06 )
------------------------------------------------------------
# Chi-Squared = 0.0 using 59 PHA bins.
# Reduced chi-squared = 0.0 for 55 degrees of freedom
# Null hypothesis probability = 1.000000e+00
Photon flux (15-150 keV) in 25.92 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jul 8 03:17:19 EDT 2009