batgrbproduct Analysis for Trigger=100585
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): Fri Jan 4 18:41:44 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger100585/GCN_download_cron
======================================================================
Trigger: 00100585 Segment: 000
BAT Trigger Time: 125503577.28 [s; MET]
Trigger Stop: 125503578.304 [s; MET]
UTC: 2004-12-23T14:06:17.956380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 100.120286808231 Dec: -37.0297252139607 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17
Image Trigger?: NO
Rate S/N Ratio: 86.6083136886985 [ if not an image trigger ]
Image S/N Ratio: 17
Flight Position: [ source = BAT ]
RA: 100.120286808231 Dec: -37.0297252139607 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 100.199469190866 Dec: -37.0701568725126 [deg; J2000]
{ 06h 40m 47.9s , -37d 04' 12.6" }
+/- 0.488240436745528 [arcmin] (estimated 90% radius based on SNR)
+/- 0.106670274617507 [arcmin] (formal 1-sigma fit error)
SNR: 84.7085631293872
RA = 6h 40m 47.9s (100.199469 deg.)
Dec = -37d 4' 13" (-37.070157 deg.)
Angular difference between Flight and Ground position is 4.501396 arcmin
Partial Coding Fraction: 0.4765625 [ including projection effects ]
Duration
T90: 109.108000010252 +/- 1.85274283336699
Measured from: 1.73999999463558
to: 110.848000004888 [s; relative to TRIGTIME]
T50: 29.2559999972582 +/- 0.633782299557944
Measured from: 19.16400000453
to: 48.4200000017881 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 35.0199999958277
to: 36.0199999958277 [s; relative to TRIGTIME]
Total Fluence
Measured from: -10.5359999984503
to: 145.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.785775 8.027053 8.023611 2.460205
0.090171 0.096458 0.088846 0.071818 [error]
Peak 0.161562 0.299590 0.373917 0.127588
0.009757 0.012244 0.013481 0.010079 [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 1.43e-06 3.34e-06 6.17e-06 2.73e-05 1.67e-05 3.84e-05 erg/cm2
Error 6.14e-08 8.25e-08 1.06e-07 1.20e-06 2.79e-07 1.21e-06 erg/cm2
Peak flux Power-law 1.45e+00 2.12e+00 2.32e+00 4.74e+00 7.35e+00 1.06e+01 ph/cm2/s
Error 1.36e-01 1.19e-01 1.02e-01 4.72e-01 3.15e-01 5.13e-01 ph/cm2/s
Fluence Cutoff-PL 1.39e-06 3.34e-06 6.23e-06 2.48e-05 1.67e-05 3.51e-05 erg/cm2
Error 9.06e-08 7.62e-08 1.71e-07 3.42e-06 2.84e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.45e+00 2.12e+00 2.32e+00 4.71e+00 7.34e+00 1.06e+01 ph/cm2/s
Error 1.36e-01 1.19e-01 1.02e-01 4.69e-01 3.15e-01 5.11e-01 ph/cm2/s
Fluence Band 1.38e-06 3.33e-06 6.22e-06 2.47e-05 1.67e-05 3.31e-05 erg/cm2
Error 8.96e-08 8.31e-08 1.44e-07 3.42e-06 2.90e-07 0.00e+00 erg/cm2
Peak flux Band 1.40e+00 2.13e+00 2.36e+00 4.23e+00 7.32e+00 9.31e+00 ph/cm2/s
Error 1.74e-01 1.23e-01 1.35e-01 9.65e-01 3.20e-01 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.115 0.034 - - 1.03e-02 1.87e-04 24.279 57
CPL 1.016 0.130 647.3 5000.0 1.12e-02 1.24e-03 22.993 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.874 0.077 - - 6.40e-02 2.75e-03 45.568 57
CPL 0.777 0.242 780.0 5000.0 7.03e-02 1.77e-02 45.071 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: 101.248000 sec.
T50 in the 50-300 keV band: 26.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 156.480 -10.536 145.944
T90 109.108 1.740 110.848
T50 29.256 19.164 48.420
Peak 1.000 35.020 36.020
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
100.1995 -37.0702 0.0023 26.7 79.5 27.9682 84.7 TRIG_00100585
------------------------------------------
Foreground time interval of the image:
-10.536 145.944 (delta_t = 156.480 [sec])
Background time interval of the image:
-299.280 -10.536 (delta_t = 288.744 [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 -10.536 sec. to 145.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11473 ( -3.415620E-02 3.397548E-02) )
Norm@50keV : 1.027972E-02 ( -1.879157E-04 1.869872E-04) )
------------------------------------------------------------
Chi-Squared = 24.27905 using 59 PHA bins.
Reduced chi-squared = 0.4259482 for 57 degrees of freedom
Null hypothesis probability = 1.000
Photon flux (15-150 keV) in 156.5 sec: 1.19414 ( -0.02383 0.02392 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67419e-05 ( -2.78883e-07 2.78883e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -10.536 sec. to 145.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01599 ( -0.140876 0.119042 )
Epeak [keV] : 647.319 ( -647.309 9352.68 )
Norm@50keV : 1.121508E-02 ( -1.025270E-03 1.447373E-03) )
------------------------------------------------------------
Chi-Squared = 22.99257 using 59 PHA bins.
Reduced chi-squared = 0.4105816 for 56 degrees of freedom
Null hypothesis probability = 1.000
Photon flux (15-150 keV) in 156.5 sec: 1.19343 ( -0.02381 0.0239 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67001e-05 ( -2.88899e-07 2.79039e-07 ) ergs/cm2
Band function
Time interval is from -10.536 sec. to 145.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.733553 ( -9.26645 1.71154 )
beta : -1.11652 ( -8.55294 0.357026 )
Epeak [keV] : 84.8896 ( -675.403 9324.50 )
Norm@50keV : 1.947496E-02 ( -9.804294E-04 470984. )
------------------------------------------------------------
Chi-Squared = 24.16595 using 59 PHA bins.
Reduced chi-squared = 0.4393809 for 55 degrees of freedom
Null hypothesis probability = 1.000
Photon flux (15-150 keV) in 156.5 sec: 1.18557 ( -0.01548 0.02622 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66862e-05 ( -2.90777e-07 2.88586e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 35.020 sec. to 36.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.873742 ( -7.703048E-02 7.610285E-02) )
Norm@50keV : 6.400668E-02 ( -2.757549E-03 2.747782E-03) )
------------------------------------------------------------
Chi-Squared = 45.56800 using 59 PHA bins.
Reduced chi-squared = 0.7994386 for 57 degrees of freedom
Null hypothesis probability = 0.862
Photon flux (15-150 keV) in 1.000 sec: 7.34597 ( -0.31525 0.3156 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.25775e-07 ( -3.295e-08 3.2995e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 35.020 sec. to 36.020 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.777170 ( -0.325006 0.159802 )
Epeak [keV] : 780.007 ( -779.997 9219.99 )
Norm@50keV : 7.028448E-02 ( -1.043637E-02 2.505735E-02) )
------------------------------------------------------------
Chi-Squared = 45.07084 using 59 PHA bins.
but latest trial 6.487431E-02 gives Chi-Squared = 0.502995
Reduced chi-squared = 0.8048365 for 56 degrees of freedom
Null hypothesis probability = 0.852
Photon flux (15-150 keV) in 1.000 sec: 7.34450 ( -0.3152 0.31544 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.24512e-07 ( -3.3337e-08 3.1644e-08 ) ergs/cm2
Band function
Time interval is from 35.020 sec. to 36.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.796794 ( -14.9990 1.019001E-03) )
beta : -0.873738 ( -8.063954E-02 7.413882E-02) )
Epeak [keV] : 19.6462 ( -19.5462 9980.33 )
Norm@50keV : 9.177818E-02 ( -1127.10 5.794356E+06) )
------------------------------------------------------------
Chi-Squared = 45.56799 using 59 PHA bins.
Reduced chi-squared = 0.8285090 for 55 degrees of freedom
Null hypothesis probability = 0.814
Photon flux (15-150 keV) in 1.000 sec: 7.32091 ( -0.32035 0.32055 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.24109e-07 ( -3.3469e-08 3.3373e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 18:53:23 EST 2008