batgrbproduct Analysis for Trigger=203109
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): Mon Dec 31 16:42:45 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger203109/GCN5_download_cron
======================================================================
Trigger: 00203109 Segment: 000
BAT Trigger Time: 165288484.992 [s; MET]
Trigger Stop: 165288485.12 [s; MET]
UTC: 2006-03-29T01:28:03.892640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 286.801626515828 Dec: 9.32851128935164 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 25.58
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 25.58
Flight Position: [ source = BAT ]
RA: 286.801626515828 Dec: 9.32851128935164 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 286.805303979215 Dec: 9.31971052357002 [deg; J2000]
{ 19h 07m 13.3s , +09d 19' 11.0" }
+/- 0.526348875718082 [arcmin] (estimated 90% radius based on SNR)
+/- 0.140159230056546 [arcmin] (formal 1-sigma fit error)
SNR: 76.0849586810045
RA = 19h 7m 13.3s (286.805304 deg.)
Dec = 9d 19' 11" (9.319711 deg.)
Angular difference between Flight and Ground position is 0.571174 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.0480000078678131 +/- 0.00565686571343518
Measured from: 0.0519999861717224
to: 0.0999999940395355 [s; relative to TRIGTIME]
T50: 0.0240000188350677 +/- 0.004
Measured from: 0.0639999806880951
to: 0.0879999995231628 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.414000004529953
to: 0.585999995470047 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.00799998641014099
to: 0.159999996423721 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.802666 0.660118 0.126600 0.000753
0.012084 0.010972 0.004952 0.001540 [error]
Peak 0.802482 0.660579 0.126830 0.000679
0.012091 0.010981 0.004959 0.001542 [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 3.41e-07 2.29e-07 1.00e-07 6.06e-08 7.00e-07 7.30e-07 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 Power-law 7.30e+01 2.77e+01 6.07e+00 1.60e+00 1.08e+02 1.08e+02 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
Fluence Cutoff-PL 2.18e-07 2.76e-07 9.95e-08 7.67e-09 6.23e-07 5.62e-07 erg/cm2
Error 8.97e-09 6.03e-09 2.22e-09 2.31e-08 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.00e+01 3.28e+01 6.32e+00 2.66e-01 8.94e+01 8.94e+01 ph/cm2/s
Error 3.96e+00 1.06e+00 3.52e-01 7.33e-02 4.34e+00 4.34e+00 ph/cm2/s
Fluence Band 2.36e-07 2.75e-07 9.92e-08 7.65e-09 6.21e-07 6.15e-07 erg/cm2
Error 7.99e-09 4.95e-09 3.49e-09 2.07e-08 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 5.10e+01 3.26e+01 6.35e+00 2.89e-01 9.01e+01 9.03e+01 ph/cm2/s
Error 3.88e+00 9.62e-01 3.22e-01 7.67e-02 3.50e+00 3.70e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.191 0.000 - - 3.49e-01 0.00e+00 280.995 57
CPL 0.784 0.345 22.0 3.1 7.21e+00 3.29e+00 35.245 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.189 0.000 - - 3.40e-01 0.00e+00 281.257 57
CPL 0.786 0.345 22.0 3.1 6.99e+00 3.19e+00 35.812 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.152 0.008 0.160
T90 0.048 0.052 0.100
T50 0.024 0.064 0.088
Peak 1.000 -0.414 0.586
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
286.8053 +9.3197 0.0025 0.0 166.7 1.5964 76.1 TRIG_00203109
------------------------------------------
Foreground time interval of the image:
0.008 0.160 (delta_t = 0.152 [sec])
Background time interval of the image:
-10.992 0.008 (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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.008 sec. to 0.160 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.19076 ( )
Norm@50keV : 0.348926 ( )
------------------------------------------------------------
Chi-Squared = 280.9947 using 59 PHA bins.
Reduced chi-squared = 4.929731 for 57 degrees of freedom
Null hypothesis probability = 2.392E-31
Photon flux (15-150 keV) in 0.1520 sec: 110.601 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.99901e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 0.160 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.784114 ( -0.358372 0.331936 )
Epeak [keV] : 22.0429 ( -3.46869 2.82238 )
Norm@50keV : 7.20516 ( -2.45473 4.13192 )
------------------------------------------------------------
Chi-Squared = 35.24502 using 59 PHA bins.
Reduced chi-squared = 0.6293753 for 56 degrees of freedom
Null hypothesis probability = 0.986
Photon flux (15-150 keV) in 0.1520 sec: 91.6904 ( -4.4278 4.4837 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.23141e-07 ( -2.30344e-08 2.32429e-08 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 0.160 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29831 ( -0.107297 3.383470E-02) )
beta : -9.37167 ( -0.628329 19.3715 )
Epeak [keV] : 16.8485 ( -4.38337 2.01194 )
Norm@50keV : 3.63239 ( -3.43353 3.30547 )
------------------------------------------------------------
Chi-Squared = 44.79932 using 59 PHA bins.
Reduced chi-squared = 0.8145331 for 55 degrees of freedom
Null hypothesis probability = 0.835
Photon flux (15-150 keV) in 0.1520 sec: 92.4666 ( -2.23 3.9544 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21391e-07 ( -1.80944e-08 2.32563e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.008 sec. to 0.164 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18893 ( )
Norm@50keV : 0.340426 ( )
------------------------------------------------------------
Chi-Squared = 281.2567 using 59 PHA bins.
Reduced chi-squared = 4.934329 for 57 degrees of freedom
Null hypothesis probability = 2.152E-31
Photon flux (15-150 keV) in 0.1560 sec: 107.765 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.00153e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 0.164 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.786006 ( -0.357494 0.332132 )
Epeak [keV] : 22.0496 ( -3.47825 2.82048 )
Norm@50keV : 6.99329 ( -2.38334 3.99881 )
------------------------------------------------------------
Chi-Squared = 35.81181 using 59 PHA bins.
Reduced chi-squared = 0.6394967 for 56 degrees of freedom
Null hypothesis probability = 0.984
Photon flux (15-150 keV) in 0.1560 sec: 89.3690 ( -4.3131 4.3666 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.23551e-07 ( -2.30362e-08 2.32435e-08 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 0.164 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30526 ( -5.287325E-02 3.054142E-02) )
beta : -9.33577 ( -0.628329 19.3713 )
Epeak [keV] : 17.1744 ( -4.71503 1.86386 )
Norm@50keV : 3.35273 ( -3.42097 3.09314 )
------------------------------------------------------------
Chi-Squared = 49.14631 using 59 PHA bins.
Reduced chi-squared = 0.8935694 for 55 degrees of freedom
Null hypothesis probability = 0.697
Photon flux (15-150 keV) in 0.1560 sec: 90.0752 ( -5.0458 1.9453 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.22935e-07 ( -1.80434e-08 1.12426e-08 ) ergs/cm2
Plot creation:
Mon Dec 31 16:47:20 EST 2007