batgrbproduct Analysis for Trigger=192152
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 13:25:12 EST 2007
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger192152/GCN5_download_cron
======================================================================
Trigger: 00192152 Segment: 000
BAT Trigger Time: 162416465.92 [s; MET]
Trigger Stop: 162416466.944 [s; MET]
UTC: 2006-02-23T19:41:04.886460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.241178315544 Dec: -30.8069451092458 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.42
Image Trigger?: NO
Rate S/N Ratio: 40.7062648740952 [ if not an image trigger ]
Image S/N Ratio: 16.42
Flight Position: [ source = BAT ]
RA: 254.241178315544 Dec: -30.8069451092458 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 254.24249670012 Dec: -30.8118778729408 [deg; J2000]
{ 16h 56m 58.2s , -30d 48' 42.8" }
+/- 0.728418369574745 [arcmin] (estimated 90% radius based on SNR)
+/- 0.24296028453263 [arcmin] (formal 1-sigma fit error)
SNR: 47.8318423800085
RA = 16h 56m 58.2s (254.242497 deg.)
Dec = -30d 48' 43" (-30.811878 deg.)
Angular difference between Flight and Ground position is 0.303664 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 9.62399998307228 +/- 0.72803571850403
Measured from: -4.9879999756813
to: 4.63600000739098 [s; relative to TRIGTIME]
T50: 5.63600000739098 +/- 0.363207920448973
Measured from: -2.55199998617172
to: 3.08400002121925 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.00800001621246
to: 4.00800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7
to: 5.52400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.705671 0.909862 0.707691 0.182862
0.027420 0.025914 0.022136 0.016225 [error]
Peak 0.069236 0.117121 0.142334 0.036341
0.007863 0.008111 0.007912 0.005570 [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 2.12e-07 3.92e-07 5.60e-07 1.69e-06 1.60e-06 2.85e-06 erg/cm2
Error 1.54e-08 1.61e-08 2.28e-08 1.65e-07 5.57e-08 1.73e-07 erg/cm2
Peak flux Power-law 6.21e-01 8.57e-01 8.72e-01 1.62e+00 2.87e+00 3.97e+00 ph/cm2/s
Error 9.22e-02 7.69e-02 6.06e-02 2.49e-01 2.01e-01 2.83e-01 ph/cm2/s
Fluence Cutoff-PL 2.11e-07 3.92e-07 5.60e-07 1.68e-06 1.60e-06 2.64e-06 erg/cm2
Error 1.54e-08 1.61e-08 2.28e-08 1.64e-07 5.58e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.41e-01 8.66e-01 9.25e-01 1.12e+00 2.82e+00 3.45e+00 ph/cm2/s
Error 1.23e-01 8.17e-02 6.32e-02 4.69e-01 2.08e-01 5.10e-01 ph/cm2/s
Fluence Band 2.09e-07 3.90e-07 5.59e-07 1.68e-06 1.59e-06 2.71e-06 erg/cm2
Error 1.53e-08 1.60e-08 2.28e-08 1.64e-07 5.57e-08 0.00e+00 erg/cm2
Peak flux Band 5.41e-01 8.66e-01 9.26e-01 1.12e+00 2.82e+00 3.45e+00 ph/cm2/s
Error 1.23e-01 8.19e-02 8.39e-02 4.68e-01 2.08e-01 5.16e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.485 0.067 - - 1.34e-02 4.50e-04 42.708 57
CPL 1.482 0.068 9998.5 5000.0 1.34e-02 4.52e-04 42.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.974 0.120 - - 2.49e-02 1.71e-03 57.187 57
CPL 0.527 0.517 204.1 4937.7 3.82e-02 1.92e-02 54.734 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: 9.856000 sec.
T50 in the 50-300 keV band: 4.416000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 12.524 -7.000 5.524
T90 9.624 -4.988 4.636
T50 5.636 -2.552 3.084
Peak 1.000 3.008 4.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.2425 -30.8119 0.0040 27.1 27.1 2.5981 47.8 TRIG_00192152
------------------------------------------
Foreground time interval of the image:
-7.000 5.524 (delta_t = 12.524 [sec])
Background time interval of the image:
-254.419 -7.000 (delta_t = 247.419 [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 -7.000 sec. to 5.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48517 ( -6.734979E-02 6.733680E-02) )
Norm@50keV : 1.340318E-02 ( -4.505143E-04 4.504211E-04) )
------------------------------------------------------------
Chi-Squared = 42.70786 using 59 PHA bins.
Reduced chi-squared = 0.7492607 for 57 degrees of freedom
Null hypothesis probability = 0.920
Photon flux (15-150 keV) in 12.52 sec: 1.66666 ( -0.06444 0.06479 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59565e-06 ( -5.55638e-08 5.59143e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.000 sec. to 5.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48227 ( -6.779611E-02 6.776500E-02) )
Epeak [keV] : 9998.50 ( -9998.50 1.49512 )
Norm@50keV : 1.344442E-02 ( -4.516356E-04 4.515797E-04) )
------------------------------------------------------------
Chi-Squared = 42.74031 using 59 PHA bins.
Reduced chi-squared = 0.7632198 for 56 degrees of freedom
Null hypothesis probability = 0.904
Photon flux (15-150 keV) in 12.52 sec: 1.66570 ( -0.0644 0.06476 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59609e-06 ( -5.57015e-08 5.58267e-08 ) ergs/cm2
Band function
Time interval is from -7.000 sec. to 5.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20738 ( -8.79262 3.91824 )
beta : -1.48517 ( -6.726921E-02 6.735098E-02) )
Epeak [keV] : 25.8465 ( -25.7465 9974.15 )
Norm@50keV : 2.844147E-02 ( -1.090784E-02 130.237 )
------------------------------------------------------------
Chi-Squared = 42.70784 using 59 PHA bins.
Reduced chi-squared = 0.7765062 for 55 degrees of freedom
Null hypothesis probability = 0.886
Photon flux (15-150 keV) in 12.52 sec: 1.66686 ( -0.06378 2.98185 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59457e-06 ( -5.56514e-08 5.58016e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 3.008 sec. to 4.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.973535 ( -0.121370 0.119058 )
Norm@50keV : 2.494372E-02 ( -1.719126E-03 1.709327E-03) )
------------------------------------------------------------
Chi-Squared = 57.18718 using 59 PHA bins.
Reduced chi-squared = 1.003284 for 57 degrees of freedom
Null hypothesis probability = 0.468
Photon flux (15-150 keV) in 1.000 sec: 2.86822 ( -0.20122 0.20177 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72309e-07 ( -1.9051e-08 1.911e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.008 sec. to 4.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.526821 ( -0.552946 0.481978 )
Epeak [keV] : 204.117 ( -79.5800 9795.88 )
Norm@50keV : 3.815283E-02 ( -1.365204E-02 2.482450E-02) )
------------------------------------------------------------
Chi-Squared = 54.73409 using 59 PHA bins.
Reduced chi-squared = 0.9773944 for 56 degrees of freedom
Null hypothesis probability = 0.523
Photon flux (15-150 keV) in 1.000 sec: 2.81803 ( -0.20788 0.20801 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.69953e-07 ( -1.9868e-08 1.9552e-08 ) ergs/cm2
Band function
Time interval is from 3.008 sec. to 4.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.860546 ( -9.13945 5.86055 )
beta : -0.973543 ( -0.119027 0.121445 )
Epeak [keV] : 26.9464 ( -26.8464 9973.05 )
Norm@50keV : 3.888470E-02 ( -1.273753E-02 430.955 )
------------------------------------------------------------
Chi-Squared = 57.18719 using 59 PHA bins.
Reduced chi-squared = 1.039767 for 55 degrees of freedom
Null hypothesis probability = 0.394
Photon flux (15-150 keV) in 1.000 sec: 2.81803 ( -0.20788 0.20884 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.69991e-07 ( -2.0012e-08 1.936e-08 ) ergs/cm2
Plot creation:
Mon Dec 31 13:38:59 EST 2007