batgrbproduct Analysis for Trigger=132129
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 Jan 7 10:18:54 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger132129/GCN5_download_cron
======================================================================
Trigger: 00132129 Segment: 000
BAT Trigger Time: 139779804.992 [s; MET]
Trigger Stop: 139779821.376 [s; MET]
UTC: 2005-06-06T19:43:25.432460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 84.746292158118 Dec: 26.3167746099471 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6
Image Trigger?: NO
Rate S/N Ratio: 7.41619848709566 [ if not an image trigger ]
Image S/N Ratio: 6
Flight Position: [ source = BAT ]
RA: 84.746292158118 Dec: 26.3167746099471 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 84.711568068426 Dec: 26.30033257343 [deg; J2000]
{ 05h 38m 50.8s , +26d 18' 01.2" }
+/- 2.59448396670467 [arcmin] (estimated 90% radius based on SNR)
+/- 1.51204279554154 [arcmin] (formal 1-sigma fit error)
SNR: 7.79142624620417
RA = 5h 38m 50.8s (84.711568 deg.)
Dec = 26d 18' 1" (26.300333 deg.)
Angular difference between Flight and Ground position is 2.112183 arcmin
Partial Coding Fraction: 0.1289062 [ including projection effects ]
Duration
T90: 145 +/- 21.1009478460092
Measured from: -46.9920000135899
to: 98.0079999864101 [s; relative to TRIGTIME]
T50: 100 +/- 33.734255586866
Measured from: -33.9920000135899
to: 66.0079999864101 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.00799998641014
to: 7.00799998641014 [s; relative to TRIGTIME]
Total Fluence
Measured from: -49.9920000135899
to: 112.00799998641 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 15.490025 13.392591 2.252039 -0.148333
0.201962 0.199754 0.153713 0.135737 [error]
Peak 0.121342 0.130726 0.025780 0.012371
0.016948 0.017367 0.012519 0.011033 [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 7.63e-06 5.39e-06 2.51e-06 1.63e-06 1.63e-05 1.72e-05 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 1.50e+00 7.65e-01 2.40e-01 9.66e-02 2.56e+00 2.60e+00 ph/cm2/s
Error 3.02e-01 1.43e-01 7.90e-02 5.45e-02 4.44e-01 4.51e-01 ph/cm2/s
Fluence Cutoff-PL 7.64e-06 5.39e-06 2.51e-06 1.62e-06 1.63e-05 1.72e-05 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 Cutoff-PL 1.29e+00 1.14e+00 1.21e-01 4.49e-04 2.56e+00 2.56e+00 ph/cm2/s
Error 3.29e-01 2.30e-01 1.02e-01 6.01e-03 4.38e-01 4.39e-01 ph/cm2/s
Fluence Band 6.26e-06 5.81e-06 2.22e-06 1.23e-06 1.45e-05 1.69e-05 erg/cm2
Error 2.64e-07 1.71e-07 4.93e-08 4.73e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 1.30e+00 1.16e+00 1.08e-01 8.84e-03 2.58e+00 2.60e+00 ph/cm2/s
Error 3.44e-01 2.37e-01 3.24e-02 4.32e-01 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.105 0.000 - - 8.04e-03 0.00e+00 199.921 57
CPL 0.367 0.505 21.9 2.8 3.55e-01 2.81e-01 48.358 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.670 0.309 - - 1.17e-02 3.06e-03 65.552 57
CPL -1.318 1.873 28.4 4.7 4.57e+00 0.00e+00 52.315 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 162.000 -49.992 112.008
T90 145.000 -46.992 98.008
T50 100.000 -33.992 66.008
Peak 1.000 6.008 7.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
84.7116 +26.3003 0.0244 38.7 -82.0 12.1217 7.8 TRIG_00132129
------------------------------------------
Foreground time interval of the image:
-49.992 18.749 (delta_t = 68.741 [sec])
20.008 112.008 (delta_t = 92.000 [sec])
Background time interval of the image:
-60.992 -51.261 (delta_t = 9.731 [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
Multiple GTIs in the spectrum
tstart tstop
-49.992000 18.749200
20.008000 112.008000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.10474 ( )
Norm@50keV : 8.038861E-03 ( )
------------------------------------------------------------
Chi-Squared = 199.9213 using 59 PHA bins.
Reduced chi-squared = 3.507391 for 57 degrees of freedom
Null hypothesis probability = 9.159E-18
Photon flux (15-150 keV) in 160.7 sec: 2.38820 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6317e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-49.992000 18.749200
20.008000 112.008000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.366861 ( -0.529671 0.480110 )
Epeak [keV] : 21.9106 ( -3.20249 2.48569 )
Norm@50keV : 0.355478 ( -0.172693 0.388554 )
------------------------------------------------------------
Chi-Squared = 48.35777 using 59 PHA bins.
Reduced chi-squared = 0.8635315 for 56 degrees of freedom
Null hypothesis probability = 0.756
Photon flux (15-150 keV) in 160.7 sec: 1.99937 ( -0.1033 0.10433 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63172e-05 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-49.992000 18.749200
20.008000 112.008000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.36388 ( -0.175935 3.896040E-02) )
beta : -9.03820 ( -1.09263 18.9073 )
Epeak [keV] : 16.8065 ( -1.74061 1.07257 )
Norm@50keV : 6.386517E-02 ( -8.891681E-02 0.384316 )
------------------------------------------------------------
Chi-Squared = 107.5997 using 59 PHA bins.
Reduced chi-squared = 1.956359 for 55 degrees of freedom
Null hypothesis probability = 2.901E-05
Photon flux (15-150 keV) in 160.7 sec: 2.05076 ( -0.06448 0.05992 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4454e-05 ( -4.22287e-07 5.2438e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 6.008 sec. to 7.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67045 ( -0.285424 0.332881 )
Norm@50keV : 1.170523E-02 ( -3.071333E-03 3.041304E-03) )
------------------------------------------------------------
Chi-Squared = 65.55184 using 59 PHA bins.
Reduced chi-squared = 1.150032 for 57 degrees of freedom
Null hypothesis probability = 0.204
Photon flux (15-150 keV) in 1.000 sec: 2.56204 ( -0.44358 0.4436 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23166e-07 ( -2.38891e-08 2.4595e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.008 sec. to 7.008 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.31837 ( -1.68163 2.06438 )
Epeak [keV] : 28.4030 ( -4.84071 4.59081 )
Norm@50keV : 4.56823 ( )
------------------------------------------------------------
Chi-Squared = 52.31456 using 59 PHA bins.
but latest trial 20.5819 gives Chi-Squared = 4.33866
Reduced chi-squared = 0.9341885 for 56 degrees of freedom
Null hypothesis probability = 0.615
Photon flux (15-150 keV) in 1.000 sec: 2.55612 ( -0.43434 0.44265 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13817e-07 ( -2.06036e-08 2.2346e-08 ) ergs/cm2
Band function
Time interval is from 6.008 sec. to 7.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30589 ( -1.44631 1.11111 )
beta : -9.01367 ( -0.986329 19.0137 )
Epeak [keV] : 19.1826 ( -27.9605 56.7107 )
Norm@50keV : 8.562928E-02 ( -586.544 285.034 )
------------------------------------------------------------
Chi-Squared = 56.90586 using 59 PHA bins.
Reduced chi-squared = 1.034652 for 55 degrees of freedom
Null hypothesis probability = 0.404
Photon flux (15-150 keV) in 1.000 sec: 2.57839 ( -0.42518 0.43894 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14466e-07 ( -2.02916e-08 2.6001e-08 ) ergs/cm2
Plot creation:
Mon Jan 7 10:24:49 EST 2008