batgrbproduct Analysis for Trigger=357141
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): Sun Jul 12 20:05:52 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger357141/GCN5_download_cron
======================================================================
Trigger: 00357141 Segment: 000
BAT Trigger Time: 269104087.236 [s; MET]
Trigger Stop: 269104087.3 [s; MET]
UTC: 2009-07-12T15:08:02.331240 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 165.244469272598 Dec: 80.0970489938907 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.63
Image Trigger?: NO
Rate S/N Ratio: 6.70820393249937 [ if not an image trigger ]
Image S/N Ratio: 5.63
Flight Position: [ source = BAT ]
RA: 165.244469272598 Dec: 80.0970489938907 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 165.114104458375 Dec: 80.0307040955712 [deg; J2000]
{ 11h 00m 27.4s , +80d 01' 50.5" }
+/- 4.29082773730175 [arcmin] (estimated 90% radius based on SNR)
+/- 2.98826940287756 [arcmin] (formal 1-sigma fit error)
SNR: 3.79741679282691
Angular difference between Flight and Ground position is 4.203273 arcmin
Partial Coding Fraction: 0.4921875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.009333 0.000065 0.002547 -0.000810
0.002322 0.002002 0.002111 0.001559 [error]
Peak 0.009333 0.000065 0.002547 -0.000810
0.002322 0.002002 0.002111 0.001559 [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 1.66e-09 1.29e-09 6.71e-10 5.05e-10 3.85e-09 4.12e-09 erg/cm2
Error 1.43e-09 1.01e-09 6.80e-10 1.08e-09 3.00e-09 2.45e-09 erg/cm2
Peak flux Power-law 8.62e-01 3.76e-01 9.80e-02 3.15e-02 1.36e+00 1.37e+00 ph/cm2/s
Error 6.27e-01 2.94e-01 8.96e-02 6.01e-02 1.07e+00 1.08e+00 ph/cm2/s
Fluence Cutoff-PL 1.66e-09 1.29e-09 6.71e-10 5.01e-10 3.85e-09 4.12e-09 erg/cm2
Error 1.43e-09 1.01e-09 6.80e-10 1.07e-09 3.00e-09 2.45e-09 erg/cm2
Peak flux Cutoff-PL 8.62e-01 3.76e-01 9.79e-02 3.12e-02 1.35e+00 1.37e+00 ph/cm2/s
Error 6.27e-01 2.94e-01 8.96e-02 5.97e-02 1.07e+00 1.08e+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 2.941 1.292 - - 5.14e-03 4.45e-03 60.320 57
CPL -4.495 0.000 19.2 0.0 7.33e+03 0.00e+00 56.220 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.941 1.292 - - 5.14e-03 4.45e-03 60.320 57
CPL -4.495 0.000 19.2 0.0 7.33e+03 0.00e+00 56.220 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
165.1141 +80.0307 0.0508 42.5 -8.3 0.0158 3.8 TRIG_00357141
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.236 -7.236 (delta_t = 53.000 [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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.94104 ( -1.09252 1.4912 )
Norm@50keV : 5.14270E-03 ( -0.0051427 0.00376697 )
------------------------------------------------------------
# Chi-Squared = 60.32 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.565734e-01
Photon flux (15-150 keV) in 0.064 sec: 1.35535 ( -1.35536 0.791659 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.8511e-09 ( -3.8511e-09 2.15738e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49546 ( )
Epeak [keV] : 19.1725 ( )
Norm@50keV : 7330.40 ( )
------------------------------------------------------------
# Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 56 degrees of freedom
# Null hypothesis probability = 4.666185e-01
Photon flux (15-150 keV) in 0.064 sec: 1.35492 ( -1.35492 0.79131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85112e-09 ( -3.85112e-09 2.15816e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.66227 ( 1.73439 1.73439 )
beta : -7.97396 ( 3.1557 3.66908 )
Epeak [keV] : 17.7643 ( -5.09978 40.591 )
Norm@50keV : 2255.04 ( -2256.22 14322.7 )
------------------------------------------------------------
# Chi-Squared = 56.87 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.053864e-01
Photon flux (15-150 keV) in 0.064 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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.94104 ( -1.09252 1.4912 )
Norm@50keV : 5.14270E-03 ( -0.0051427 0.00376697 )
------------------------------------------------------------
# Chi-Squared = 60.32 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.565734e-01
Photon flux (15-150 keV) in 0.064 sec: 1.35535 ( -1.35536 0.791659 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.8511e-09 ( -3.8511e-09 2.15738e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.49546 ( )
Epeak [keV] : 19.1725 ( )
Norm@50keV : 7330.40 ( )
------------------------------------------------------------
# Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 56 degrees of freedom
# Null hypothesis probability = 4.666185e-01
Photon flux (15-150 keV) in 0.064 sec: 1.35492 ( -1.35492 0.79131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85112e-09 ( -3.85112e-09 2.15816e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.66227 ( 1.73439 1.73439 )
beta : -7.97396 ( 3.1557 3.66908 )
Epeak [keV] : 17.7643 ( -5.09978 40.591 )
Norm@50keV : 2255.04 ( -2256.22 14322.7 )
------------------------------------------------------------
# Chi-Squared = 56.87 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.053864e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jul 12 20:15:10 EDT 2009