batgrbproduct Analysis for Trigger=213056
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 v2.41
Process Start Time (local time): Tue Jan 1 14:40:18 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger213056/GCN5_download_cron
======================================================================
Trigger: 00213056 Segment: 000
BAT Trigger Time: 170922192 [s; MET]
Trigger Stop: 170922512 [s; MET]
UTC: 2006-06-02T06:23:10.769600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 255.250035128707 Dec: -46.1770981847709 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.55
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.55
Flight Position: [ source = BAT ]
RA: 255.250035128707 Dec: -46.1770981847709 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 255.260668775313 Dec: -46.1579441052903 [deg; J2000]
{ 17h 01m 02.6s , -46d 09' 28.6" }
+/- 3.68302030708092 [arcmin] (estimated 90% radius based on SNR)
+/- 2.4129333460624 [arcmin] (formal 1-sigma fit error)
SNR: 4.72340691214726
RA = 17h 1m 2.6s (255.260669 deg.)
Dec = -46d 9' 29" (-46.157944 deg.)
Angular difference between Flight and Ground position is 1.231262 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.646796 0.037892 0.018124 0.009788
0.073512 0.064141 0.053610 0.045352 [error]
Peak 0.646796 0.037892 0.018124 0.009788
0.073512 0.064141 0.053610 0.045352 [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 1.87e-07 3.61e-08 3.40e-09 3.50e-10 2.27e-07 2.27e-07 erg/cm2
Error 4.14e-08 2.50e-08 6.17e-09 1.38e-09 6.23e-08 6.25e-08 erg/cm2
Peak flux Power-law 3.57e-02 4.00e-03 1.89e-04 9.32e-06 3.99e-02 3.99e-02 ph/cm2/s
Error 7.76e-03 3.54e-03 3.32e-04 3.46e-05 9.40e-03 9.40e-03 ph/cm2/s
Fluence Cutoff-PL 1.87e-07 3.60e-08 3.40e-09 3.47e-10 2.27e-07 2.27e-07 erg/cm2
Error 4.14e-08 2.50e-08 6.15e-09 1.37e-09 6.23e-08 6.26e-08 erg/cm2
Peak flux Cutoff-PL 3.56e-02 4.00e-03 1.88e-04 9.24e-06 3.98e-02 3.98e-02 ph/cm2/s
Error 7.75e-03 3.54e-03 3.31e-04 3.43e-05 9.40e-03 9.40e-03 ph/cm2/s
Fluence Band 2.05e-07 2.34e-08 4.08e-10 5.53e-12 2.22e-07 4.01e-07 erg/cm2
Error 4.35e-08 5.37e-08 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 3.56e-02 4.00e-03 1.88e-04 9.24e-06 3.98e-02 3.98e-02 ph/cm2/s
Error 7.75e-03 3.54e-03 3.31e-04 3.43e-05 9.40e-03 9.40e-03 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.407 1.145 - - 1.74e-05 2.49e-05 45.300 57
CPL -2.173 0.000 10.4 6.6 6.30e+01 6.93e+02 43.015 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.407 1.145 - - 1.74e-05 2.49e-05 45.300 57
CPL -2.173 0.000 10.4 6.6 6.30e+01 6.93e+02 43.015 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
255.2607 -46.1579 0.0407 19.2 -31.0 0.7609 4.7 TRIG_00213056
------------------------------------------
Foreground time interval of the image:
0.000 183.047 (delta_t = 183.047 [sec])
Background time interval of the image:
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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.40708 ( -1.02948 1.26058 )
Norm@50keV : 1.743894E-05 ( -1.743894E-05 3.243340E-05) )
------------------------------------------------------------
Chi-Squared = 45.29956 using 59 PHA bins.
Reduced chi-squared = 0.7947291 for 57 degrees of freedom
Null hypothesis probability = 0.868
Photon flux (15-150 keV) in 183.0 sec: 3.987945E-02 ( -0.00937478 0.00942664 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26772e-07 ( -5.99546e-08 6.4696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.17293 ( )
Epeak [keV] : 10.4082 ( -11.2084 2.07691 )
Norm@50keV : 62.9536 ( -318.965 1067.93 )
------------------------------------------------------------
Chi-Squared = 43.01527 using 59 PHA bins.
Reduced chi-squared = 0.7681298 for 56 degrees of freedom
Null hypothesis probability = 0.898
Photon flux (15-150 keV) in 183.0 sec: 3.983836E-02 ( -0.00937107 0.00942285 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26605e-07 ( -5.99144e-08 6.47655e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51149 ( -7.55425 3.46001 )
beta : -4.05409 ( -1.26186 14.7938 )
Epeak [keV] : 16.1446 ( -16.0446 9983.86 )
Norm@50keV : 7.453880E-04 ( -1.44990 26.4206 )
------------------------------------------------------------
Chi-Squared = 73.92350 using 59 PHA bins.
Reduced chi-squared = 1.344064 for 55 degrees of freedom
Null hypothesis probability = 4.523E-02
Photon flux (15-150 keV) in 183.0 sec: 3.983855E-02 ( -0.00937124 0.00942268 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2231e-07 ( -5.31463e-08 5.42979e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.40708 ( -1.02948 1.26058 )
Norm@50keV : 1.743894E-05 ( -1.743894E-05 3.243340E-05) )
------------------------------------------------------------
Chi-Squared = 45.29956 using 59 PHA bins.
Reduced chi-squared = 0.7947291 for 57 degrees of freedom
Null hypothesis probability = 0.868
Photon flux (15-150 keV) in 183.0 sec: 3.987945E-02 ( -0.00937478 0.00942664 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26772e-07 ( -5.99546e-08 6.4696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.17293 ( )
Epeak [keV] : 10.4082 ( -11.2084 2.07691 )
Norm@50keV : 62.9536 ( -318.965 1067.93 )
------------------------------------------------------------
Chi-Squared = 43.01527 using 59 PHA bins.
Reduced chi-squared = 0.7681298 for 56 degrees of freedom
Null hypothesis probability = 0.898
Photon flux (15-150 keV) in 183.0 sec: 3.983836E-02 ( -0.00937107 0.00942285 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26605e-07 ( -5.99144e-08 6.47655e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.047 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51149 ( -7.61625 3.46001 )
beta : -4.05409 ( -1.26182 14.7938 )
Epeak [keV] : 16.1446 ( -16.0446 9983.86 )
Norm@50keV : 7.453880E-04 ( -1.72669 26.2235 )
------------------------------------------------------------
Chi-Squared = 73.92350 using 59 PHA bins.
Reduced chi-squared = 1.344064 for 55 degrees of freedom
Null hypothesis probability = 4.523E-02
Photon flux (15-150 keV) in 183.0 sec: 3.983855E-02 ( -0.00937124 0.00942268 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2231e-07 ( -5.31463e-08 5.42979e-08 ) ergs/cm2
Plot creation:
Tue Jan 1 14:49:12 EST 2008