batgrbproduct Analysis for Trigger=358035
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): Fri Jul 24 06:43:17 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger358035/GCN5_download_cron
======================================================================
Trigger: 00358035 Segment: 000
BAT Trigger Time: 270052753.472 [s; MET]
Trigger Stop: 270052754.496 [s; MET]
UTC: 2009-07-23T14:39:08.536500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 179.597443958255 Dec: 19.7865850327644 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.7
Image Trigger?: NO
Rate S/N Ratio: 11.3578166916005 [ if not an image trigger ]
Image S/N Ratio: 5.7
Flight Position: [ source = BAT ]
RA: 179.597443958255 Dec: 19.7865850327644 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 179.544483587591 Dec: 19.7693428327062 [deg; J2000]
{ 11h 58m 10.7s , +19d 46' 09.6" }
+/- 3.60944757809674 [arcmin] (estimated 90% radius based on SNR)
+/- 1.95826345154675 [arcmin] (formal 1-sigma fit error)
SNR: 4.86154676276695
Angular difference between Flight and Ground position is 3.164082 arcmin
Partial Coding Fraction: 0.515625 [ 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 0.009762 0.001593 0.030453 0.025478
0.008430 0.008869 0.008614 0.008663 [error]
Peak 0.009762 0.001593 0.030453 0.025478
0.008430 0.008869 0.008614 0.008663 [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 1.20e-09 4.80e-09 1.61e-08 1.82e-07 4.57e-08 2.04e-07 erg/cm2
Error 1.86e-09 4.71e-09 1.19e-08 2.56e-07 2.10e-08 2.63e-07 erg/cm2
Peak flux Power-law 3.69e-02 7.88e-02 1.32e-01 5.06e-01 3.63e-01 7.54e-01 ph/cm2/s
Error 5.79e-02 7.93e-02 5.40e-02 8.05e-01 1.92e-01 5.47e-01 ph/cm2/s
Fluence Cutoff-PL 3.10e-10 3.60e-09 1.93e-08 1.16e-07 0.00e+00 0.00e+00 erg/cm2
Error 1.49e-09 2.55e-09 9.64e-09 2.31e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.17e-03 5.29e-02 1.63e-01 1.50e-01 3.19e-01 4.10e-01 ph/cm2/s
Error 4.63e-02 6.21e-02 8.22e-02 4.11e-01 1.65e-01 4.74e-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 0.254 0.575 - - 2.91e-03 2.44e-03 31.870 57
CPL -4.982 0.000 113.8 43.0 4.93e-02 4.71e-02 30.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.254 0.575 - - 2.91e-03 2.44e-03 31.870 57
CPL -4.982 0.000 113.8 43.0 4.93e-02 4.71e-02 30.400 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
179.5445 +19.7693 0.0396 42.1 -11.6 0.0823 4.9 TRIG_00358035
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.472 -9.472 (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: 0.253788 ( -0.253788 0.896513 )
Norm@50keV : 2.91143E-03 ( -0.00291143 0.00196667 )
------------------------------------------------------------
# Chi-Squared = 31.87 using 59 PHA bins.
# Reduced chi-squared = 0.5592 for 57 degrees of freedom
# Null hypothesis probability = 9.971482e-01
Photon flux (15-150 keV) in 1.024 sec: 0.363395 ( -0.184044 0.200673 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57304e-08 ( -2.10132e-08 2.10271e-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: -4.98198 ( )
Epeak [keV] : 113.755 ( -32.4286 53.531 )
Norm@50keV : 4.92720E-02 ( -0.049272 0.0449667 )
------------------------------------------------------------
# Chi-Squared = 30.40 using 59 PHA bins.
# Reduced chi-squared = 0.5428 for 56 degrees of freedom
# Null hypothesis probability = 9.979426e-01
Photon flux (15-150 keV) in 1.024 sec: 0.318902 ( -0.151079 0.17748 ) 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 : -0.727919 ( 0.727697 0.727697 )
beta : -0.253886 ( -0.896847 0.992136 )
Epeak [keV] : 14.7454 ( -14.7456 -14.7456 )
Norm@50keV : 4.44809E-03 ( 842.236 -0.00444802 )
------------------------------------------------------------
# Chi-Squared = 31.87 using 59 PHA bins.
# Reduced chi-squared = 0.5795 for 55 degrees of freedom
# Null hypothesis probability = 9.947152e-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: 0.253788 ( -0.253788 0.896513 )
Norm@50keV : 2.91143E-03 ( -0.00291143 0.00196667 )
------------------------------------------------------------
# Chi-Squared = 31.87 using 59 PHA bins.
# Reduced chi-squared = 0.5592 for 57 degrees of freedom
# Null hypothesis probability = 9.971482e-01
Photon flux (15-150 keV) in 1.024 sec: 0.363395 ( -0.184044 0.200673 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57304e-08 ( -2.10132e-08 2.10271e-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: -4.98198 ( )
Epeak [keV] : 113.755 ( -32.4286 53.531 )
Norm@50keV : 4.92720E-02 ( -0.049272 0.0449667 )
------------------------------------------------------------
# Chi-Squared = 30.40 using 59 PHA bins.
# Reduced chi-squared = 0.5428 for 56 degrees of freedom
# Null hypothesis probability = 9.979426e-01
Photon flux (15-150 keV) in 1.024 sec: 0.318902 ( -0.151079 0.17793 ) 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 : -0.727919 ( 0.727697 0.727697 )
beta : -0.253886 ( -0.896847 0.992136 )
Epeak [keV] : 14.7454 ( -14.7456 -14.7456 )
Norm@50keV : 4.44809E-03 ( 842.236 -0.00444802 )
------------------------------------------------------------
# Chi-Squared = 31.87 using 59 PHA bins.
# Reduced chi-squared = 0.5795 for 55 degrees of freedom
# Null hypothesis probability = 9.947152e-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 Jul 24 06:56:25 EDT 2009