batgrbproduct Analysis for Trigger=210842
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 13:14:50 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger210842/GCN5_download_cron
======================================================================
Trigger: 00210842 Segment: 000
BAT Trigger Time: 169821776 [s; MET]
Trigger Stop: 169821840 [s; MET]
UTC: 2006-05-20T12:42:54.795280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.56221441322 Dec: -64.983321487899 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.3
Flight Position: [ source = BAT ]
RA: 212.56221441322 Dec: -64.983321487899 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 213.076509902858 Dec: -65.0060065277602 [deg; J2000]
{ 14h 12m 18.4s , -65d 00' 21.6" }
+/- 10.503449811039 [arcmin] (estimated 90% radius based on SNR)
+/- 7.01035657207877 [arcmin] (formal 1-sigma fit error)
SNR: 1.05699447277475
RA = 14h 12m 18.4s (213.076510 deg.)
Dec = -65d 0' 22" (-65.006007 deg.)
Angular difference between Flight and Ground position is 13.114431 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.047047 0.012395 -0.033852 0.008144
0.027057 0.026431 0.022973 0.020129 [error]
Peak 0.047047 0.012395 -0.033852 0.008144
0.027057 0.026431 0.022973 0.020129 [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 8.63e-09 4.74e-09 1.64e-09 7.35e-10 1.54e-08 1.58e-08 erg/cm2
Error 9.82e-09 7.45e-09 6.28e-09 1.22e-07 2.25e-08 1.52e-07 erg/cm2
Peak flux Power-law 8.78e-03 2.73e-03 4.73e-04 9.42e-05 1.21e-02 1.21e-02 ph/cm2/s
Error 1.00e-02 4.14e-03 1.71e-03 9.14e-03 1.02e-02 1.44e-02 ph/cm2/s
Fluence Cutoff-PL 8.64e-09 7.34e-09 2.00e-10 2.18e-14 2.03e-08 1.58e-08 erg/cm2
Error 1.15e-08 4.41e-09 6.74e-09 2.14e-08 1.72e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.78e-03 2.74e-03 4.72e-04 9.38e-05 1.21e-02 1.21e-02 ph/cm2/s
Error 1.00e-02 4.14e-03 1.71e-03 1.21e-02 1.43e-02 1.44e-02 ph/cm2/s
Fluence Band 1.18e-08 5.72e-09 1.04e-10 6.82e-13 2.03e-08 2.00e-08 erg/cm2
Error 1.23e-08 1.01e-08 4.01e-09 3.15e-09 2.05e-08 3.64e-08 erg/cm2
Peak flux Band 1.04e-02 3.84e-03 3.01e-04 3.45e-06 1.45e-02 1.45e-02 ph/cm2/s
Error 1.09e-02 4.28e-03 1.17e-03 2.84e-03 1.52e-02 1.52e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.517 6.500 - - 2.95e-05 7.08e-05 52.340 57
CPL -2.389 0.000 21.0 21.1 6.52e-01 8.28e+02 51.132 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.517 6.500 - - 2.95e-05 7.08e-05 52.340 57
CPL -2.389 0.000 21.0 21.1 6.52e-01 8.28e+02 51.132 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
213.0765 -65.0060 0.1817 11.3 -67.7 0.0536 1.1 TRIG_00210842
------------------------------------------
Foreground time interval of the image:
0.000 33.088 (delta_t = 33.088 [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 33.088 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.51671 ( -6.51671 6.48329 )
Norm@50keV : 2.947560E-05 ( -2.947560E-05 1.120650E-04) )
------------------------------------------------------------
Chi-Squared = 52.33974 using 59 PHA bins.
Reduced chi-squared = 0.9182410 for 57 degrees of freedom
Null hypothesis probability = 0.650
Photon flux (15-150 keV) in 33.09 sec: 1.205091E-02 ( -0.0120509 0.00827341 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54123e-08 ( -1.54123e-08 2.94948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.38879 ( )
Epeak [keV] : 21.0367 ( -21.5221 20.5952 )
Norm@50keV : 0.651987 ( -1.81708 1653.39 )
------------------------------------------------------------
Chi-Squared = 51.13247 using 59 PHA bins.
Reduced chi-squared = 0.9130799 for 56 degrees of freedom
Null hypothesis probability = 0.659
Photon flux (15-150 keV) in 33.09 sec: 1.205160E-02 ( -0.0120516 0.0165255 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03337e-08 ( -2.03337e-08 2.25056e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.088 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.98549 ( -1.01451 13.9855 )
beta : -3.53686 ( -6.46314 13.5369 )
Epeak [keV] : 73.9954 ( -73.8954 9926.00 )
Norm@50keV : 3.917901E-03 ( -3.917901E-03 1.531974E-02) )
------------------------------------------------------------
Chi-Squared = 52.33959 using 59 PHA bins.
Reduced chi-squared = 0.9516289 for 55 degrees of freedom
Null hypothesis probability = 0.577
Photon flux (15-150 keV) in 33.09 sec: 1.452848E-02 ( -0.0145285 0.015889 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03388e-08 ( -2.03388e-08 2.06395e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 33.088 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.51671 ( -6.51671 6.48329 )
Norm@50keV : 2.947560E-05 ( -2.947560E-05 1.120650E-04) )
------------------------------------------------------------
Chi-Squared = 52.33974 using 59 PHA bins.
Reduced chi-squared = 0.9182410 for 57 degrees of freedom
Null hypothesis probability = 0.650
Photon flux (15-150 keV) in 33.09 sec: 1.205091E-02 ( -0.0120509 0.00827341 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54123e-08 ( -1.54123e-08 2.94948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.38879 ( )
Epeak [keV] : 21.0367 ( -21.5221 20.5952 )
Norm@50keV : 0.651987 ( -1.81708 1653.39 )
------------------------------------------------------------
Chi-Squared = 51.13247 using 59 PHA bins.
Reduced chi-squared = 0.9130799 for 56 degrees of freedom
Null hypothesis probability = 0.659
Photon flux (15-150 keV) in 33.09 sec: 1.205160E-02 ( -0.0120516 0.0165255 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03337e-08 ( -2.03337e-08 2.25056e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.088 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.98549 ( -1.01451 13.9855 )
beta : -3.53686 ( -6.46314 13.5369 )
Epeak [keV] : 73.9954 ( -73.8954 9926.00 )
Norm@50keV : 3.917901E-03 ( -3.917901E-03 1.531974E-02) )
------------------------------------------------------------
Chi-Squared = 52.33959 using 59 PHA bins.
Reduced chi-squared = 0.9516289 for 55 degrees of freedom
Null hypothesis probability = 0.577
Photon flux (15-150 keV) in 33.09 sec: 1.452848E-02 ( -0.0145285 0.015889 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03388e-08 ( -2.03388e-08 2.06395e-08 ) ergs/cm2
Plot creation:
Tue Jan 1 13:19:17 EST 2008