batgrbproduct Analysis for Trigger=355693
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 v2.45
Process Start Time (local time): Thu Jun 25 19:56:32 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355693/GCN5_download_cron
======================================================================
Trigger: 00355693 Segment: 000
BAT Trigger Time: 267606827.884 [s; MET]
Trigger Stop: 267606827.916 [s; MET]
UTC: 2009-06-25T07:13:43.027760 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 173.532064271349 Dec: 50.3536318738902 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.68
Image Trigger?: NO
Rate S/N Ratio: 6.85565460040104 [ if not an image trigger ]
Image S/N Ratio: 5.68
Flight Position: [ source = BAT ]
RA: 173.532064271349 Dec: 50.3536318738902 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 173.524094381036 Dec: 50.5074869481454 [deg; J2000]
{ 11h 34m 05.8s , +50d 30' 27.0" }
+/- 4.7968992580909 [arcmin] (estimated 90% radius based on SNR)
+/- 2.79952758433586 [arcmin] (formal 1-sigma fit error)
SNR: 3.23830332727456
Angular difference between Flight and Ground position is 9.236329 arcmin
Partial Coding Fraction: 0.8515625 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.004434 -0.001057 0.001918 0.000123
0.001127 0.000948 0.000783 0.000818 [error]
Peak 0.004434 -0.001057 0.001918 0.000123
0.001127 0.000948 0.000783 0.000818 [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 0.00e+00 3.95e-10 1.66e-10 4.08e-11 1.21e-11 6.22e-10 erg/cm2
Error 2.16e-10 1.02e-10 1.54e-09 6.85e-10 6.79e-09 0.00e+00 erg/cm2
Peak flux Power-law 4.32e-01 1.02e-01 1.24e-02 1.68e-03 5.47e-01 0.00e+00 ph/cm2/s
Error 4.42e-01 1.28e-01 2.98e-02 1.77e-01 5.67e-01 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 7.08e-10 2.21e-10 1.58e-12 1.07e-17 9.33e-10 0.00e+00 erg/cm2
Error 4.86e-10 1.92e-10 2.56e-11 1.06e-12 6.68e-10 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.31e-01 1.02e-01 1.24e-02 1.67e-03 5.47e-01 0.00e+00 ph/cm2/s
Error 4.42e-01 1.28e-01 2.98e-02 2.21e-01 5.68e-01 0.00e+00 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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 Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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 1.500 0.000 - - 0.00e+00 2.08e-03 64.560 57
CPL -4.490 0.000 17.8 0.0 6.81e+03 8.97e+03 57.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 0.000 - - 0.00e+00 2.08e-03 64.560 57
CPL -4.490 0.000 17.8 0.0 6.81e+03 8.97e+03 57.910 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
173.5241 +50.5075 0.0593 19.9 37.7 0.0059 3.2 TRIG_00355693
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.884 -3.884 (delta_t = 57.000 [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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00415773 )
------------------------------------------------------------
# Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293650e-01
Photon flux (15-150 keV) in 0.032 sec: 0.546773 ( -0.546773 0.587639 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21648e-10 ( -6.21648e-10 7.48163e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49025 ( -1 -1 )
Epeak [keV] : 17.8350 ( )
Norm@50keV : 6808.27 ( -6940.72 10997.4 )
------------------------------------------------------------
# Chi-Squared = 57.91 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.044733e-01
Photon flux (15-150 keV) in 0.032 sec: 0.546684 ( -0.546684 0.588316 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32605e-10 ( -6.50662e-10 6.85085e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.03427 ( 4.27393 4.27393 )
beta : -4.03763 ( 4.03795 4.03795 )
Epeak [keV] : 80.0000 ( -80 -80 )
Norm@50keV : 0.116606 ( -0.116576 0.311646 )
------------------------------------------------------------
# Chi-Squared = 62.10 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 55 degrees of freedom
# Null hypothesis probability = 2.378608e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00415773 )
------------------------------------------------------------
# Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293650e-01
Photon flux (15-150 keV) in 0.032 sec: 0.546773 ( -0.546773 0.587639 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21648e-10 ( -6.21648e-10 7.48163e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49025 ( -1 -1 )
Epeak [keV] : 17.8350 ( )
Norm@50keV : 6808.27 ( -6940.72 10997.4 )
------------------------------------------------------------
# Chi-Squared = 57.91 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.044733e-01
Photon flux (15-150 keV) in 0.032 sec: 0.546684 ( -0.546684 0.588316 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32605e-10 ( -6.50662e-10 6.85085e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.03427 ( 4.27393 4.27393 )
beta : -4.03763 ( 4.03795 4.03795 )
Epeak [keV] : 80.0000 ( -80 -80 )
Norm@50keV : 0.116606 ( -0.116576 0.311646 )
------------------------------------------------------------
# Chi-Squared = 62.10 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 55 degrees of freedom
# Null hypothesis probability = 2.378608e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Thu Jun 25 20:17:57 EDT 2009