batgrbproduct Analysis for Trigger=355924
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): Mon Jun 29 03:44:53 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355924/GCN5_download_cron
======================================================================
Trigger: 00355924 Segment: 000
BAT Trigger Time: 267894659.136 [s; MET]
Trigger Stop: 267894660.16 [s; MET]
UTC: 2009-06-28T15:10:54.270440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 52.9654854200717 Dec: -12.2123720436643 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.6
Image Trigger?: NO
Rate S/N Ratio: 19.3649167310371 [ if not an image trigger ]
Image S/N Ratio: 5.6
Flight Position: [ source = BAT ]
RA: 52.9654854200717 Dec: -12.2123720436643 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 53.072595531173 Dec: -12.1649653786618 [deg; J2000]
{ 03h 32m 17.4s , -12d 09' 53.9" }
+/- 6.16296215027713 [arcmin] (estimated 90% radius based on SNR)
+/- 5.33277384672854 [arcmin] (formal 1-sigma fit error)
SNR: 2.26385009024648
Angular difference between Flight and Ground position is 6.895710 arcmin
Partial Coding Fraction: 0.4179688 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.001290 -0.001758 0.037135 0.020514
0.009889 0.010789 0.010369 0.011314 [error]
Peak -0.001290 -0.001758 0.037135 0.020514
0.009889 0.010789 0.010369 0.011314 [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 9.65e-10 4.35e-09 1.67e-08 2.35e-07 4.91e-08 2.56e-07 erg/cm2
Error 1.84e-09 4.91e-09 1.31e-08 4.47e-07 2.56e-08 4.52e-07 erg/cm2
Peak flux Power-law 2.94e-02 7.10e-02 1.36e-01 6.40e-01 3.69e-01 8.78e-01 ph/cm2/s
Error 5.72e-02 8.24e-02 1.07e-01 9.56e-01 3.04e-01 8.96e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.04e-02 6.47e-02 1.84e-01 4.37e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 4.19e-02 6.03e-02 7.67e-02 6.52e-01 0.00e+00 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 0.058 0.540 - - 2.79e-03 2.60e-03 51.310 57
CPL -4.991 0.000 98.0 40.3 1.30e-01 1.07e-01 49.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.058 0.540 - - 2.79e-03 2.60e-03 51.310 57
CPL -4.991 0.000 98.0 40.3 1.30e-01 1.07e-01 49.010 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
53.0726 -12.1650 0.0854 45.4 -170.2 0.0486 2.3 TRIG_00355924
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.136 -11.136 (delta_t = 49.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.84461E-02 ( -0.0585221 1.02246 )
Norm@50keV : 2.78734E-03 ( -0.00278747 0.00241706 )
------------------------------------------------------------
# Chi-Squared = 51.31 using 59 PHA bins.
# Reduced chi-squared = 0.9002 for 57 degrees of freedom
# Null hypothesis probability = 6.874811e-01
Photon flux (15-150 keV) in 1.024 sec: 0.368802 ( -0.368806 0.239239 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91251e-08 ( -2.56311e-08 2.56411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99087 ( )
Epeak [keV] : 98.0358 ( -27.2306 53.3169 )
Norm@50keV : 0.129933 ( -0.129933 0.0838499 )
------------------------------------------------------------
# Chi-Squared = 49.01 using 59 PHA bins.
# Reduced chi-squared = 0.8751 for 56 degrees of freedom
# Null hypothesis probability = 7.346384e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.272492 ( 0.26701 0.26701 )
beta : -6.17998E-02 ( -1.02179 0.0591942 )
Epeak [keV] : 20.8905 ( -20.8414 -20.8414 )
Norm@50keV : 4.19536E-03 ( -0.00418886 16944.2 )
------------------------------------------------------------
# Chi-Squared = 51.31 using 59 PHA bins.
# Reduced chi-squared = 0.9329 for 55 degrees of freedom
# Null hypothesis probability = 6.163940e-01
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.84461E-02 ( -0.0585221 1.02246 )
Norm@50keV : 2.78734E-03 ( -0.00278747 0.00241706 )
------------------------------------------------------------
# Chi-Squared = 51.31 using 59 PHA bins.
# Reduced chi-squared = 0.9002 for 57 degrees of freedom
# Null hypothesis probability = 6.874811e-01
Photon flux (15-150 keV) in 1.024 sec: 0.368802 ( -0.368806 0.239239 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91251e-08 ( -2.56311e-08 2.56411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99087 ( )
Epeak [keV] : 98.0358 ( -27.2306 53.3169 )
Norm@50keV : 0.129933 ( -0.129933 0.0838499 )
------------------------------------------------------------
# Chi-Squared = 49.01 using 59 PHA bins.
# Reduced chi-squared = 0.8751 for 56 degrees of freedom
# Null hypothesis probability = 7.346384e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.272492 ( 0.26701 0.26701 )
beta : -6.17998E-02 ( -1.02179 0.0591942 )
Epeak [keV] : 20.8905 ( -20.8414 -20.8414 )
Norm@50keV : 4.19536E-03 ( -0.00418886 16944.2 )
------------------------------------------------------------
# Chi-Squared = 51.31 using 59 PHA bins.
# Reduced chi-squared = 0.9329 for 55 degrees of freedom
# Null hypothesis probability = 6.163940e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Mon Jun 29 03:56:09 EDT 2009