batgrbproduct Analysis for Trigger=356529
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 Jul 6 00:48:41 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356529/GCN5_download_cron
======================================================================
Trigger: 00356529 Segment: 000
BAT Trigger Time: 268477377.6 [s; MET]
Trigger Stop: 268477378.624 [s; MET]
UTC: 2009-07-05T09:02:52.715540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 7.84620392110792 Dec: 23.9937555366489 [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: 10.7238052947636 [ if not an image trigger ]
Image S/N Ratio: 5.74
Flight Position: [ source = BAT ]
RA: 7.84620392110792 Dec: 23.9937555366489 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 7.8930438307753 Dec: 23.9977251820246 [deg; J2000]
{ 00h 31m 34.3s , +23d 59' 51.8" }
+/- 3.58405239400686 [arcmin] (estimated 90% radius based on SNR)
+/- 2.26646640828685 [arcmin] (formal 1-sigma fit error)
SNR: 4.91083138877914
Angular difference between Flight and Ground position is 2.578532 arcmin
Partial Coding Fraction: 0.2617188 [ 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: -2.98023223876953e-08
to: 1.02399995923042 [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 0.003520 0.004388 0.047288 0.047280
0.012593 0.013501 0.012865 0.013133 [error]
Peak 0.003520 0.004388 0.047288 0.047280
0.012593 0.013501 0.012865 0.013133 [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 1.89e-09 7.58e-09 2.56e-08 2.92e-07 7.29e-08 3.27e-07 erg/cm2
Error 3.03e-09 7.65e-09 1.86e-08 5.78e-07 3.08e-08 5.20e-07 erg/cm2
Peak flux Power-law 5.78e-02 1.24e-01 2.10e-01 8.14e-01 5.77e-01 1.21e+00 ph/cm2/s
Error 9.44e-02 1.29e-01 1.54e-01 1.20e+00 4.51e-01 1.07e+00 ph/cm2/s
Fluence Cutoff-PL 1.22e-09 6.77e-09 2.84e-08 1.32e-07 7.30e-08 1.99e-07 erg/cm2
Error 2.97e-09 7.61e-09 1.28e-08 4.34e-07 3.14e-08 6.26e-07 erg/cm2
Peak flux Cutoff-PL 3.29e-02 1.08e-01 2.32e-01 4.48e-01 5.55e-01 9.59e-01 ph/cm2/s
Error 9.26e-02 1.27e-01 1.39e-01 1.27e+00 3.03e-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 0.243 1.847 - - 4.61e-03 3.92e-03 71.850 57
CPL -0.109 1.116 473.4 0.0 5.84e-03 1.31e-01 71.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.243 1.847 - - 4.61e-03 3.92e-03 71.850 57
CPL -0.109 1.116 473.4 0.0 5.84e-03 1.31e-01 71.790 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: 0.576000 sec.
T50 in the 50-300 keV band: 0.320000 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
7.8930 +23.9977 0.0392 50.6 -4.7 0.1316 4.9 TRIG_00356529
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.600 -9.600 (delta_t = 51.000 [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: 0.243413 ( -2.81783 0.876858 )
Norm@50keV : 4.61390E-03 ( -0.0046139 0.00321625 )
------------------------------------------------------------
# Chi-Squared = 71.85 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.904390e-02
Photon flux (15-150 keV) in 1.024 sec: 0.577476 ( -0.577476 0.324567 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29008e-08 ( -3.08293e-08 3.08372e-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: -0.108631 ( 0.132633 2.36514 )
Epeak [keV] : 473.363 ( -427.393 -427.393 )
Norm@50keV : 5.83590E-03 ( -0.00610473 0.255183 )
------------------------------------------------------------
# Chi-Squared = 71.79 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 56 degrees of freedom
# Null hypothesis probability = 7.599657e-02
Photon flux (15-150 keV) in 1.024 sec: 0.554585 ( -0.264983 0.340324 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30246e-08 ( -3.19077e-08 3.08643e-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 : -0.395942 ( 0.395942 0.395942 )
beta : -0.243423 ( -0.876931 2.82163 )
Epeak [keV] : 18.6344 ( -18.6344 -18.6344 )
Norm@50keV : 7.04212E-03 ( -0.00704212 90568.9 )
------------------------------------------------------------
# Chi-Squared = 71.85 using 59 PHA bins.
# Reduced chi-squared = 1.306 for 55 degrees of freedom
# Null hypothesis probability = 6.316875e-02
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: 0.243413 ( -2.81783 0.876858 )
Norm@50keV : 4.61390E-03 ( -0.0046139 0.00321625 )
------------------------------------------------------------
# Chi-Squared = 71.85 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.904390e-02
Photon flux (15-150 keV) in 1.024 sec: 0.577476 ( -0.577476 0.324567 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29008e-08 ( -3.08293e-08 3.08372e-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: -0.108631 ( 0.132633 2.36514 )
Epeak [keV] : 473.363 ( -427.393 -427.393 )
Norm@50keV : 5.83590E-03 ( -0.00610473 0.255183 )
------------------------------------------------------------
# Chi-Squared = 71.79 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 56 degrees of freedom
# Null hypothesis probability = 7.599657e-02
Photon flux (15-150 keV) in 1.024 sec: 0.554585 ( -0.264983 0.340324 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30246e-08 ( -3.19077e-08 3.08643e-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 : -0.395942 ( 0.395942 0.395942 )
beta : -0.243423 ( -0.876931 2.82163 )
Epeak [keV] : 18.6344 ( -18.6344 -18.6344 )
Norm@50keV : 7.04212E-03 ( -0.00704212 90568.9 )
------------------------------------------------------------
# Chi-Squared = 71.85 using 59 PHA bins.
# Reduced chi-squared = 1.306 for 55 degrees of freedom
# Null hypothesis probability = 6.316875e-02
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 Jul 6 00:56:32 EDT 2009