batgrbproduct Analysis for Trigger=132247
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 10:25:36 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger132247/SDC
======================================================================
Trigger: 00132247 Segment: 000
BAT Trigger Time: 139828282.368 [s; MET]
Trigger Stop: 139828283.392 [s; MET]
UTC: 2005-06-07T09:11:22.807560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 300.166992902482 Dec: 9.13699352299647 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9
Image Trigger?: NO
Rate S/N Ratio: 18.1383571472171 [ if not an image trigger ]
Image S/N Ratio: 9
Flight Position: [ source = BAT ]
RA: 300.166992902482 Dec: 9.13699352299647 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.178081386365 Dec: 9.13005514842934 [deg; J2000]
{ 20h 00m 42.7s , +09d 07' 48.2" }
+/- 1.50444255821069 [arcmin] (estimated 90% radius based on SNR)
+/- 0.54325340914404 [arcmin] (formal 1-sigma fit error)
SNR: 16.9716728198723
RA = 20h 0m 42.7s (300.178081 deg.)
Dec = 9d 7' 48" (9.130055 deg.)
Angular difference between Flight and Ground position is 0.777683 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 48 +/- 35.7770876399966
Measured from: -11.3680000007153
to: 36.6319999992847 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: -11.3680000007153
to: 4.63199999928474 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.1319999992847
to: 13.1319999992847 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.3680000007153
to: 52.6319999992847 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.427461 0.456589 0.238327 0.073685
0.039968 0.040134 0.033952 0.027696 [error]
Peak 0.225824 0.168660 0.089350 0.016834
0.021097 0.021138 0.017759 0.014484 [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 1.28e-07 1.89e-07 2.08e-07 4.29e-07 6.56e-07 9.52e-07 erg/cm2
Error 2.00e-08 1.91e-08 3.33e-08 1.41e-07 7.71e-08 1.73e-07 erg/cm2
Peak flux Power-law 1.40e-01 9.08e-02 3.80e-02 2.17e-02 2.80e-01 2.91e-01 ph/cm2/s
Error 2.44e-02 1.15e-02 9.35e-03 1.00e-02 3.46e-02 3.60e-02 ph/cm2/s
Fluence Cutoff-PL 1.27e-07 1.93e-07 2.09e-07 3.42e-07 6.49e-07 8.36e-07 erg/cm2
Error 2.18e-08 2.43e-08 3.42e-08 2.41e-07 8.69e-08 2.66e-07 erg/cm2
Peak flux Cutoff-PL 1.40e-01 9.08e-02 3.80e-02 2.15e-02 2.80e-01 2.91e-01 ph/cm2/s
Error 2.44e-02 1.15e-02 9.35e-03 9.97e-03 3.46e-02 3.60e-02 ph/cm2/s
Fluence Band 1.23e-07 1.97e-07 2.03e-07 3.57e-07 6.42e-07 8.85e-07 erg/cm2
Error 2.23e-08 2.64e-08 3.63e-08 1.71e-07 8.31e-08 2.46e-07 erg/cm2
Peak flux Band 1.39e-01 9.08e-02 3.81e-02 2.18e-02 2.80e-01 2.92e-01 ph/cm2/s
Error 1.99e-02 1.13e-02 5.53e-03 1.20e-02 3.45e-02 3.59e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.865 0.189 - - 1.12e-03 1.31e-04 64.649 57
CPL 1.742 0.631 92.8 5000.0 1.31e-03 1.92e-03 64.587 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.256 0.267 - - 1.64e-03 3.01e-04 71.069 57
CPL 1.987 0.495 2.2 0.0 2.31e-03 5.85e-04 71.569 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: 18.688000 sec.
T50 in the 50-300 keV band: 12.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -11.368 52.632
T90 48.000 -11.368 36.632
T50 16.000 -11.368 4.632
Peak 1.000 12.132 13.132
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.1781 +9.1301 0.0113 27.0 3.0 0.9005 17.0 TRIG_00132247
------------------------------------------
Foreground time interval of the image:
-11.368 16.533 (delta_t = 27.901 [sec])
Background time interval of the image:
-101.867 -11.368 (delta_t = 90.499 [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 -11.368 sec. to 52.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86500 ( -0.185729 0.191851 )
Norm@50keV : 1.115201E-03 ( -1.319329E-04 1.292031E-04) )
------------------------------------------------------------
Chi-Squared = 64.64946 using 59 PHA bins.
Reduced chi-squared = 1.134201 for 57 degrees of freedom
Null hypothesis probability = 0.227
Photon flux (15-150 keV) in 64.00 sec: 0.157717 ( -0.016186 0.016201 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.56179e-07 ( -7.66118e-08 7.76384e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.368 sec. to 52.632 sec.
Parameters : value lower 90% higher 90%
Photon index: 1.74192 ( -0.699712 0.561991 )
Epeak [keV] : 92.8199 ( -92.8099 9907.18 )
Norm@50keV : 1.307273E-03 ( -1.307273E-03 2.527863E-03) )
------------------------------------------------------------
Chi-Squared = 64.58710 using 59 PHA bins.
but latest trial 1.04221 gives Chi-Squared = 1.97395
but latest trial 2.30391 gives Chi-Squared = 1.91692
Reduced chi-squared = 1.153341 for 56 degrees of freedom
Null hypothesis probability = 0.202
Photon flux (15-150 keV) in 64.00 sec: 0.157042 ( -0.015939 0.016374 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.48883e-07 ( -8.97536e-08 8.41408e-08 ) ergs/cm2
Band function
Time interval is from -11.368 sec. to 52.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25617 ( -8.74382 3.70674 )
beta : -2.04624 ( -7.95376 0.348705 )
Epeak [keV] : 45.3633 ( -45.2634 9954.64 )
Norm@50keV : 2.622426E-03 ( -2.95392 370.595 )
------------------------------------------------------------
Chi-Squared = 64.14017 using 59 PHA bins.
Reduced chi-squared = 1.166185 for 55 degrees of freedom
Null hypothesis probability = 0.187
Photon flux (15-150 keV) in 64.00 sec: 0.156159 ( -0.01675 0.008267 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.41901e-07 ( -8.45882e-08 8.16576e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 4.632 sec. to 20.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.25605 ( -0.254727 0.279242 )
Norm@50keV : 1.642428E-03 ( -3.062577E-04 2.954667E-04) )
------------------------------------------------------------
Chi-Squared = 71.06913 using 59 PHA bins.
Reduced chi-squared = 1.246827 for 57 degrees of freedom
Null hypothesis probability = 9.958E-02
Photon flux (15-150 keV) in 16.00 sec: 0.280178 ( -0.034563 0.034569 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49128e-07 ( -3.76288e-08 3.88752e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.632 sec. to 20.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98669 ( -0.692057 0.298561 )
Epeak [keV] : 2.22374 ( )
Norm@50keV : 2.308151E-03 ( -7.330457E-04 4.363529E-04) )
------------------------------------------------------------
Chi-Squared = 71.56917 using 59 PHA bins.
Reduced chi-squared = 1.278021 for 56 degrees of freedom
Null hypothesis probability = 7.852E-02
Photon flux (15-150 keV) in 16.00 sec: 0.280075 ( -0.034548 0.034556 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.4915e-07 ( -3.76672e-08 3.884e-08 ) ergs/cm2
Band function
Time interval is from 4.632 sec. to 20.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47993 ( -8.52007 6.47993 )
beta : -2.25627 ( -0.328144 0.255153 )
Epeak [keV] : 11.4211 ( -11.3211 37.9495 )
Norm@50keV : 8.235071E-03 ( -8.235071E-03 722.494 )
------------------------------------------------------------
Chi-Squared = 71.07185 using 59 PHA bins.
Reduced chi-squared = 1.292215 for 55 degrees of freedom
Null hypothesis probability = 7.125E-02
Photon flux (15-150 keV) in 16.00 sec: 0.280181 ( -0.034531 0.034488 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48763e-07 ( -3.27536e-08 3.68432e-08 ) ergs/cm2
Plot creation:
Mon Jan 7 10:36:08 EST 2008