batgrbproduct Analysis for Trigger=213190
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 15:15:31 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger213190/GCN5_download_cron
======================================================================
Trigger: 00213190 Segment: 000
BAT Trigger Time: 170985275.136 [s; MET]
Trigger Stop: 170985276.16 [s; MET]
UTC: 2006-06-02T23:54:33.904120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 267.379966382982 Dec: -28.1088244879662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.34
Image Trigger?: NO
Rate S/N Ratio: 10.816653826392 [ if not an image trigger ]
Image S/N Ratio: 8.34
Flight Position: [ source = BAT ]
RA: 267.379966382982 Dec: -28.1088244879662 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.369515666743 Dec: -28.1188120156765 [deg; J2000]
{ 17h 49m 28.7s , -28d 07' 07.7" }
+/- 1.43557287193562 [arcmin] (estimated 90% radius based on SNR)
+/- 0.599151350905379 [arcmin] (formal 1-sigma fit error)
SNR: 18.1466559137843
RA = 17h 49m 28.7s (267.369516 deg.)
Dec = -28d 7' 8" (-28.118812 deg.)
Angular difference between Flight and Ground position is 0.815462 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 9.04800000786781 +/- 1.05668350295526
Measured from: -0.631999999284744
to: 8.41600000858307 [s; relative to TRIGTIME]
T50: 4.55200001597404 +/- 0.675336953175413
Measured from: 1.83599999547005
to: 6.38800001144409 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.89599999785423
to: 6.89599999785423 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.09200000762939
to: 8.82799997925758 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.501285 0.074047 0.034044 -0.000831
0.019744 0.016146 0.014629 0.014703 [error]
Peak 0.066476 0.017038 0.002882 0.004817
0.006524 0.005187 0.004693 0.004693 [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 1.41e-07 3.40e-08 4.26e-09 5.95e-10 1.80e-07 1.80e-07 erg/cm2
Error 1.79e-08 8.79e-09 2.67e-09 6.77e-10 2.07e-08 2.07e-08 erg/cm2
Peak flux Power-law 6.43e-01 1.45e-01 1.66e-02 2.11e-03 8.06e-01 8.06e-01 ph/cm2/s
Error 1.21e-01 5.24e-02 1.39e-02 3.54e-03 1.45e-01 1.45e-01 ph/cm2/s
Fluence Cutoff-PL 1.41e-07 3.40e-08 4.25e-09 5.90e-10 1.80e-07 1.80e-07 erg/cm2
Error 1.79e-08 8.79e-09 2.67e-09 6.72e-10 2.07e-08 2.07e-08 erg/cm2
Peak flux Cutoff-PL 6.49e-01 1.40e-01 8.63e-03 1.73e-04 7.98e-01 8.08e-01 ph/cm2/s
Error 9.66e-02 6.33e-02 1.71e-02 3.49e-03 1.44e-01 1.45e-01 ph/cm2/s
Fluence Band 1.36e-07 3.47e-08 3.23e-09 3.68e-10 1.80e-07 2.26e-07 erg/cm2
Error 1.60e-08 4.78e-09 1.78e-09 2.11e-08 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 6.42e-01 1.44e-01 1.50e-02 6.08e-04 7.99e-01 8.06e-01 ph/cm2/s
Error 1.53e-01 4.25e-02 1.71e-02 3.47e-03 1.48e-01 1.45e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.000 0.525 - - 3.67e-04 1.81e-04 67.416 57
CPL 1.694 2.046 1.9 5.6 1.98e-01 0.00e+00 70.029 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.123 0.704 - - 1.17e-03 1.04e-03 46.610 57
CPL 1.853 2.008 1.4 0.0 7.77e-02 6.06e-02 46.670 0
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 9.920 -1.092 8.828
T90 9.048 -0.632 8.416
T50 4.552 1.836 6.388
Peak 1.000 5.896 6.896
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.3695 -28.1188 0.0106 1.2 168.3 0.6248 18.1 TRIG_00213190
------------------------------------------
Foreground time interval of the image:
-1.092 8.828 (delta_t = 9.920 [sec])
Background time interval of the image:
-119.136 -56.001 (delta_t = 63.135 [sec])
-55.136 -1.092 (delta_t = 54.044 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -1.092 sec. to 8.828 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.99993 ( -0.512944 0.536917 )
Norm@50keV : 3.671201E-04 ( -1.487468E-04 2.130062E-04) )
------------------------------------------------------------
Chi-Squared = 67.41596 using 59 PHA bins.
Reduced chi-squared = 1.182736 for 57 degrees of freedom
Null hypothesis probability = 0.163
Photon flux (15-150 keV) in 9.920 sec: 0.566404 ( -0.065974 0.066098 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79894e-07 ( -2.06425e-08 2.06703e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.092 sec. to 8.828 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69354 ( -1.44737 2.64550 )
Epeak [keV] : 1.92458 ( -1.91458 9.33594 )
Norm@50keV : 0.197636 ( )
------------------------------------------------------------
Chi-Squared = 70.02894 using 59 PHA bins.
but latest trial 0.246287 gives Chi-Squared = 1.14085
Reduced chi-squared = 1.250517 for 56 degrees of freedom
Null hypothesis probability = 9.843E-02
Photon flux (15-150 keV) in 9.920 sec: 0.565891 ( -0.065897 0.066018 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7983e-07 ( -2.06415e-08 2.06634e-08 ) ergs/cm2
Band function
Time interval is from -1.092 sec. to 8.828 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.56691 ( -1.43309 2.31092 )
beta : -4.99830 ( -0.538417 0.510720 )
Epeak [keV] : 275.285 ( -275.185 9724.71 )
Norm@50keV : 4.995816E-02 ( -2.028628E-02 2.888948E-02) )
------------------------------------------------------------
Chi-Squared = 67.41595 using 59 PHA bins.
Reduced chi-squared = 1.225744 for 55 degrees of freedom
Null hypothesis probability = 0.122
Photon flux (15-150 keV) in 9.920 sec: 0.565986 ( -0.060615 0.071383 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79854e-07 ( -2.16861e-08 2.04382e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 5.896 sec. to 6.896 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.12263 ( -0.640694 0.767118 )
Norm@50keV : 1.173226E-03 ( -1.173226E-03 9.157953E-04) )
------------------------------------------------------------
Chi-Squared = 46.60975 using 59 PHA bins.
Reduced chi-squared = 0.8177149 for 57 degrees of freedom
Null hypothesis probability = 0.835
Photon flux (15-150 keV) in 1.000 sec: 0.805869 ( -0.144674 0.14488 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82971e-08 ( -5.8996e-09 6.2931e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.896 sec. to 6.896 sec.
Parameters : value lower 90% higher 90%
Photon index: 1.85332 ( -1.30695 2.71001 )
Epeak [keV] : 1.43763 ( )
Norm@50keV : 7.768859E-02 ( -3.666783E-02 8.456711E-02) )
------------------------------------------------------------
Chi-Squared = 46.66956 using 59 PHA bins.
but latest trial 0.546401 gives Chi-Squared = 59.6211
but latest trial 0.150636 gives Chi-Squared = 3.01672
Reduced chi-squared = 0.8333849 for 56 degrees of freedom
Null hypothesis probability = 0.808
Photon flux (15-150 keV) in 1.000 sec: 0.798090 ( -0.143572 0.143584 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82953e-08 ( -5.9037e-09 6.3054e-09 ) ergs/cm2
Band function
Time interval is from 5.896 sec. to 6.896 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.76955 ( -9.577572E-02 8.517992E-02) )
beta : -8.88967 ( -1.11033 18.8863 )
Epeak [keV] : 2.02748 ( -1.92748 14.1163 )
Norm@50keV : 0.106066 ( -6.092084E-02 2086.99 )
------------------------------------------------------------
Chi-Squared = 46.77963 using 59 PHA bins.
Reduced chi-squared = 0.8505387 for 55 degrees of freedom
Null hypothesis probability = 0.777
Photon flux (15-150 keV) in 1.000 sec: 0.798619 ( -0.143143 0.152852 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88411e-08 ( -5.1308e-09 1.20825e-08 ) ergs/cm2
Plot creation:
Tue Jan 1 15:23:13 EST 2008