batgrbproduct Analysis for Trigger=160619
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): Wed Jan 9 16:54:02 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger160619/GCN5_download_cron
======================================================================
Trigger: 00160619 Segment: 000
BAT Trigger Time: 151589553.248 [s; MET]
Trigger Stop: 151589553.632 [s; MET]
UTC: 2005-10-21T12:12:33.452860 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 32 ms to TRIGTIME + 320 ms
BAT
RA: 106.671522176407 Dec: -40.4352909342245 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 33399
Image Trigger?: NO
Rate S/N Ratio: 8.36660026534076 [ if not an image trigger ]
Image S/N Ratio: 33399
Flight Position: [ source = BAT ]
RA: 106.671522176407 Dec: -40.4352909342245 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 106.749350328986 Dec: -40.6316159011397 [deg; J2000]
{ 07h 06m 59.8s , -40d 37' 53.8" }
+/- 4.1932597951731 [arcmin] (estimated 90% radius based on SNR)
+/- 3.36886666928272 [arcmin] (formal 1-sigma fit error)
SNR: 3.92426844616238
RA = 7h 6m 59.8s (106.749350 deg.)
Dec = -40d 37' 54" (-40.631616 deg.)
Angular difference between Flight and Ground position is 12.302543 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 0.38400000333786 +/-
Measured from: 0
to: 0.38400000333786 [s; relative to TRIGTIME]
T50: 0.38400000333786 +/-
Measured from: 0
to: 0.38400000333786 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.38400000333786 second)
Measured from: 0
to: 0.38400000333786 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.38400000333786 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.006648 0.002678 0.003920 0.004702
0.003172 0.003302 0.003091 0.002599 [error]
Peak -0.006648 0.002678 0.003920 0.004702
0.003172 0.003302 0.003091 0.002599 [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 5.15e-11 3.24e-10 1.70e-09 4.04e-08 5.53e-09 5.60e-08 erg/cm2
Error 2.77e-10 7.31e-10 2.12e-09 8.32e-08 6.26e-09 0.00e+00 erg/cm2
Peak flux Power-law 4.30e-03 1.38e-02 3.63e-02 2.79e-01 9.92e-02 3.33e-01 ph/cm2/s
Error 2.31e-02 3.26e-02 4.62e-02 5.19e-01 1.27e-01 5.39e-01 ph/cm2/s
Fluence Cutoff-PL 3.24e-11 4.06e-10 2.77e-09 8.98e-09 6.89e-09 0.00e+00 erg/cm2
Error 2.30e-10 7.95e-10 3.01e-09 1.07e-07 7.08e-09 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.14e-03 1.38e-02 5.73e-02 9.82e-02 1.25e-01 0.00e+00 ph/cm2/s
Error 3.41e-02 6.59e-02 6.47e-01 1.33e-01 0.00e+00 0.00e+00 ph/cm2/s
Fluence Band 4.67e-18 6.27e-12 2.65e-09 7.61e-09 7.31e-09 0.00e+00 erg/cm2
Error 1.12e-07 7.29e-09 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 1.66e-07 1.06e-02 6.00e-02 8.96e-02 1.26e-01 0.00e+00 ph/cm2/s
Error 3.28e-02 6.47e-02 6.64e-01 1.30e-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 -0.383 6.500 - - 6.30e-04 1.06e-03 49.602 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 0.00e+00 51.406 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.383 6.500 - - 6.30e-04 1.06e-03 49.602 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 0.00e+00 51.406 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.384 0.000 0.384
T90 0.384 0.000 0.384
T50 0.384 0.000 0.384
Peak 0.384 0.000 0.384
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
106.7494 -40.6316 0.0494 26.2 12.1 0.0232 3.9 TRIG_00160619
------------------------------------------
Foreground time interval of the image:
-0.032 0.352 (delta_t = 0.384 [sec])
Background time interval of the image:
-119.280 -77.659 (delta_t = 41.621 [sec])
-60.280 -1.280 (delta_t = 59.000 [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 -0.032 sec. to 0.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.382786 ( -2.61721 10.3828 )
Norm@50keV : 6.297372E-04 ( -6.297372E-04 1.487761E-03) )
------------------------------------------------------------
Chi-Squared = 49.60202 using 59 PHA bins.
Reduced chi-squared = 0.8702108 for 57 degrees of freedom
Null hypothesis probability = 0.746
Photon flux (15-150 keV) in 0.3840 sec: 9.917994E-02 ( -0.0991799 0.154981 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53359e-09 ( -5.53359e-09 6.9822e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 51.40648 using 59 PHA bins.
Reduced chi-squared = 0.9179729 for 56 degrees of freedom
Null hypothesis probability = 0.649
Photon flux (15-150 keV) in 0.3840 sec: 0.125263 ( -0.125263 0.140676 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.89219e-09 ( -6.89219e-09 7.26708e-09 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -1.644992E-02 1.514037E-02) )
------------------------------------------------------------
Chi-Squared = 51.40648 using 59 PHA bins.
Reduced chi-squared = 0.9346632 for 55 degrees of freedom
Null hypothesis probability = 0.613
Photon flux (15-150 keV) in 0.3840 sec: 0.126028 ( -0.126028 0.134932 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30871e-09 ( -7.30871e-09 7.28018e-09 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.032 sec. to 0.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.382786 ( -2.61721 10.3828 )
Norm@50keV : 6.297372E-04 ( -6.297372E-04 1.487761E-03) )
------------------------------------------------------------
Chi-Squared = 49.60202 using 59 PHA bins.
Reduced chi-squared = 0.8702108 for 57 degrees of freedom
Null hypothesis probability = 0.746
Photon flux (15-150 keV) in 0.3840 sec: 9.917994E-02 ( -0.0991799 0.154981 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53359e-09 ( -5.53359e-09 6.9822e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 51.40648 using 59 PHA bins.
Reduced chi-squared = 0.9179729 for 56 degrees of freedom
Null hypothesis probability = 0.649
Photon flux (15-150 keV) in 0.3840 sec: 0.125263 ( -0.125263 0.140676 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.89219e-09 ( -6.89219e-09 7.26708e-09 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -1.644992E-02 1.514037E-02) )
------------------------------------------------------------
Chi-Squared = 51.40648 using 59 PHA bins.
Reduced chi-squared = 0.9346632 for 55 degrees of freedom
Null hypothesis probability = 0.613
Photon flux (15-150 keV) in 0.3840 sec: 0.126028 ( -0.126028 0.134932 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30871e-09 ( -7.30871e-09 7.28018e-09 ) ergs/cm2
Plot creation:
Wed Jan 9 17:00:49 EST 2008