batgrbproduct Analysis for Trigger=353527
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 v2.44
Process Start Time (local time): Fri May 29 21:01:22 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger353527/GCN5_download_cron
======================================================================
Trigger: 00353527 Segment: 000
BAT Trigger Time: 265272601.152 [s; MET]
Trigger Stop: 265272602.176 [s; MET]
UTC: 2009-05-29T06:49:56.370660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 307.488672749775 Dec: 28.3341745921027 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.74
Image Trigger?: NO
Rate S/N Ratio: 19.5192212959431 [ if not an image trigger ]
Image S/N Ratio: 5.74
Flight Position: [ source = BAT ]
RA: 307.488672749775 Dec: 28.3341745921027 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 307.511441701188 Dec: 28.3375006108579 [deg; J2000]
{ 20h 30m 02.7s , +28d 20' 15.0" }
+/- 4.69869501509757 [arcmin] (estimated 90% radius based on SNR)
+/- 3.09820237437228 [arcmin] (formal 1-sigma fit error)
SNR: 3.33542262689697
Angular difference between Flight and Ground position is 1.218895 arcmin
Partial Coding Fraction: 0.65625 [ 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 -0.013734 0.017186 0.027810 0.026945
0.008187 0.008353 0.008867 0.009250 [error]
Peak -0.013734 0.017186 0.027810 0.026945
0.008187 0.008353 0.008867 0.009250 [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 1.17e-09 5.08e-09 1.87e-08 2.46e-07 5.44e-08 2.71e-07 erg/cm2
Error 1.50e-09 4.53e-09 1.33e-08 3.22e-07 2.26e-08 4.45e-07 erg/cm2
Peak flux Power-law 3.57e-02 8.29e-02 1.53e-01 6.74e-01 4.15e-01 9.44e-01 ph/cm2/s
Error 4.65e-02 7.55e-02 1.09e-01 1.01e+00 1.84e-01 9.26e-01 ph/cm2/s
Fluence Cutoff-PL 5.61e-10 5.70e-09 2.35e-08 2.54e-08 4.65e-08 5.57e-08 erg/cm2
Error 1.16e-09 4.13e-09 9.73e-09 2.33e-07 2.35e-08 2.43e-07 erg/cm2
Peak flux Cutoff-PL 1.74e-02 9.38e-02 2.03e-01 1.10e-01 3.87e-01 4.30e-01 ph/cm2/s
Error 3.75e-02 7.44e-02 6.47e-02 5.99e-01 1.68e-01 6.26e-01 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 0.115 0.420 - - 3.18e-03 1.90e-03 62.390 57
CPL -4.079 0.000 85.2 36.1 1.81e-01 0.00e+00 61.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.115 0.420 - - 3.18e-03 1.90e-03 62.390 57
CPL -4.079 0.000 85.2 36.1 1.81e-01 0.00e+00 61.070 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
307.5114 +28.3375 0.0576 33.7 10.4 0.0632 3.3 TRIG_00353527
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.152 -55.007 (delta_t = 5.145 [sec])
-54.152 -9.152 (delta_t = 45.000 [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: 0.114541 ( -0.120441 0.720417 )
Norm@50keV : 3.18126E-03 ( -0.00195541 0.00184213 )
------------------------------------------------------------
# Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.905380e-01
Photon flux (15-150 keV) in 1.024 sec: 0.414998 ( -0.18103 0.187895 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.43554e-08 ( -2.24728e-08 2.27208e-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: -4.07942 ( )
Epeak [keV] : 85.1851 ( -21.2026 51.0457 )
Norm@50keV : 0.181387 ( )
------------------------------------------------------------
# Chi-Squared = 61.07 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 56 degrees of freedom
# Null hypothesis probability = 2.986690e-01
Photon flux (15-150 keV) in 1.024 sec: 0.387431 ( -0.159262 0.177021 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.65187e-08 ( -2.1354e-08 2.56502e-08 ) 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 : 5.00000 ( -950396 -950396 )
beta : -1.28292 ( 1.28292 1.60698 )
Epeak [keV] : 72.3160 ( -72.316 39.266 )
Norm@50keV : 0.672233 ( -0.618449 72048.9 )
------------------------------------------------------------
# Chi-Squared = 59.90 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 55 degrees of freedom
# Null hypothesis probability = 3.023715e-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: 0.114541 ( -0.120441 0.720417 )
Norm@50keV : 3.18126E-03 ( -0.00195541 0.00184213 )
------------------------------------------------------------
# Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.905380e-01
Photon flux (15-150 keV) in 1.024 sec: 0.414998 ( -0.18103 0.187895 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.43554e-08 ( -2.24728e-08 2.27208e-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: -4.07942 ( )
Epeak [keV] : 85.1851 ( -21.2026 51.0457 )
Norm@50keV : 0.181387 ( )
------------------------------------------------------------
# Chi-Squared = 61.07 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 56 degrees of freedom
# Null hypothesis probability = 2.986690e-01
Photon flux (15-150 keV) in 1.024 sec: 0.387431 ( -0.159262 0.177021 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.65187e-08 ( -2.1354e-08 2.56502e-08 ) 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 : 5.00000 ( -950396 -950396 )
beta : -1.28292 ( 1.28292 1.60698 )
Epeak [keV] : 72.3160 ( -72.316 39.266 )
Norm@50keV : 0.672233 ( -0.618449 47490.1 )
------------------------------------------------------------
# Chi-Squared = 59.90 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 55 degrees of freedom
# Null hypothesis probability = 3.023715e-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:
Fri May 29 21:18:52 EDT 2009