batgrbproduct Analysis for Trigger=360435
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 Aug 20 01:43:40 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360435/GCN5_download_cron
======================================================================
Trigger: 00360435 Segment: 000
BAT Trigger Time: 272402468.864 [s; MET]
Trigger Stop: 272402469.376 [s; MET]
UTC: 2009-08-19T19:21:03.852120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 250.100069030358 Dec: -47.3303261590304 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.78
Image Trigger?: NO
Rate S/N Ratio: 55.7404700374871 [ if not an image trigger ]
Image S/N Ratio: 5.78
Flight Position: [ source = BAT ]
RA: 250.100069030358 Dec: -47.3303261590304 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 250.105615959753 Dec: -47.3037895802323 [deg; J2000]
{ 16h 40m 25.3s , -47d 18' 13.6" }
+/- 3.39117112602379 [arcmin] (estimated 90% radius based on SNR)
+/- 2.01269763610553 [arcmin] (formal 1-sigma fit error)
SNR: 5.3146655917784
Angular difference between Flight and Ground position is 1.608102 arcmin
Partial Coding Fraction: 0.46875 [ including projection effects ]
Duration
T90: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
T50: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.51199996471405 second)
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.027369 0.020552 0.002144 0.001157
0.007453 0.006697 0.005663 0.004807 [error]
Peak 0.027369 0.020552 0.002144 0.001157
0.007453 0.006697 0.005663 0.004807 [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 9.13e-09 8.06e-09 4.89e-09 4.48e-09 2.40e-08 2.66e-08 erg/cm2
Error 3.93e-09 3.48e-09 3.96e-09 7.82e-09 1.04e-08 1.43e-08 erg/cm2
Peak flux Power-law 5.90e-01 2.92e-01 8.84e-02 3.40e-02 9.90e-01 1.00e+00 ph/cm2/s
Error 2.59e-01 1.22e-01 6.93e-02 5.48e-02 3.64e-01 3.70e-01 ph/cm2/s
Fluence Cutoff-PL 8.50e-09 1.02e-08 1.68e-09 1.26e-11 2.04e-08 2.04e-08 erg/cm2
Error 4.24e-09 4.92e-09 3.92e-09 4.84e-09 9.03e-09 1.14e-08 erg/cm2
Peak flux Cutoff-PL 5.32e-01 3.74e-01 3.46e-02 1.42e-04 9.41e-01 9.41e-01 ph/cm2/s
Error 2.84e-01 1.71e-01 7.10e-02 3.51e-02 3.52e-01 3.53e-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 2.722 0.818 - - 4.37e-03 2.67e-03 56.500 57
CPL -0.325 1.009 24.0 0.0 5.02e-01 0.00e+00 54.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.722 0.818 - - 4.37e-03 2.67e-03 56.500 57
CPL -0.325 1.009 24.0 0.0 5.02e-01 0.00e+00 54.760 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 0.512 0.000 0.512
T90 0.512 0.000 0.512
T50 0.512 0.000 0.512
Peak 0.512 0.000 0.512
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.1056 -47.3038 0.0361 43.3 -173.5 0.0675 5.3 TRIG_00360435
------------------------------------------
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-60.864 -4.864 (delta_t = 56.000 [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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72221 ( -0.702107 0.934004 )
Norm@50keV : 4.36947E-03 ( -0.00257432 0.00276431 )
------------------------------------------------------------
# Chi-Squared = 56.50 using 59 PHA bins.
# Reduced chi-squared = 0.9913 for 57 degrees of freedom
# Null hypothesis probability = 4.936821e-01
Photon flux (15-150 keV) in 0.512 sec: 0.989732 ( -0.363818 0.363819 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39876e-08 ( -9.91805e-09 1.0948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.325324 ( 0.378808 2.39667 )
Epeak [keV] : 23.9668 ( )
Norm@50keV : 0.501786 ( )
------------------------------------------------------------
# Chi-Squared = 54.76 using 59 PHA bins.
# Reduced chi-squared = 0.9779 for 56 degrees of freedom
# Null hypothesis probability = 5.218957e-01
Photon flux (15-150 keV) in 0.512 sec: 0.941084 ( -0.345203 0.359216 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03576e-08 ( -7.68404e-09 1.03746e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.48929 ( 0.813639 0.813639 )
beta : -9.99997 ( 126112 126122 )
Epeak [keV] : 25.5513 ( -20.5134 12.9333 )
Norm@50keV : 3.17406 ( -2.9345 421.45 )
------------------------------------------------------------
# Chi-Squared = 54.72 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 55 degrees of freedom
# Null hypothesis probability = 4.852906e-01
Photon flux (15-150 keV) in 0.512 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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.72221 ( -0.702107 0.934004 )
Norm@50keV : 4.36947E-03 ( -0.00257432 0.00276431 )
------------------------------------------------------------
# Chi-Squared = 56.50 using 59 PHA bins.
# Reduced chi-squared = 0.9913 for 57 degrees of freedom
# Null hypothesis probability = 4.936821e-01
Photon flux (15-150 keV) in 0.512 sec: 0.989732 ( -0.363818 0.363819 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39876e-08 ( -9.91805e-09 1.0948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.325324 ( 0.378808 2.39667 )
Epeak [keV] : 23.9668 ( )
Norm@50keV : 0.501786 ( )
------------------------------------------------------------
# Chi-Squared = 54.76 using 59 PHA bins.
# Reduced chi-squared = 0.9779 for 56 degrees of freedom
# Null hypothesis probability = 5.218957e-01
Photon flux (15-150 keV) in 0.512 sec: 0.941084 ( -0.345203 0.359216 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03576e-08 ( -7.68404e-09 1.03746e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.48929 ( 0.813639 0.813639 )
beta : -9.99997 ( 126112 126122 )
Epeak [keV] : 25.5513 ( -20.5131 12.9333 )
Norm@50keV : 3.17406 ( -2.9345 421.45 )
------------------------------------------------------------
# Chi-Squared = 54.72 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 55 degrees of freedom
# Null hypothesis probability = 4.852906e-01
Photon flux (15-150 keV) in 0.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Thu Aug 20 01:58:23 EDT 2009