batgrbproduct Analysis for Trigger=375058
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 Nov 6 12:43:18 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger375058/GCN5_download_cron
======================================================================
Trigger: 00375058 Segment: 000
BAT Trigger Time: 279209369.664 [s; MET]
Trigger Stop: 279209371.712 [s; MET]
UTC: 2009-11-06T14:09:24.427300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 267.990792360491 Dec: -22.381272860448 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.56
Image Trigger?: NO
Rate S/N Ratio: 6 [ if not an image trigger ]
Image S/N Ratio: 6.56
Flight Position: [ source = BAT ]
RA: 267.990792360491 Dec: -22.381272860448 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.995401231636 Dec: -22.4330186851897 [deg; J2000]
{ 17h 51m 58.9s , -22d 25' 58.9" }
+/- 4.12443227222893 [arcmin] (estimated 90% radius based on SNR)
+/- 2.73030537070295 [arcmin] (formal 1-sigma fit error)
SNR: 4.01815512774115
Angular difference between Flight and Ground position is 3.115257 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 2.04800003767014 +/-
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
T50: 2.04800003767014 +/-
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 2.04800003767014 second)
Measured from: -2.98023223876953e-08
to: 2.04800000786781 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 2.04800003767014 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.059524 0.038669 0.002208 -0.009636
0.009309 0.009225 0.008667 0.009705 [error]
Peak 0.059524 0.038669 0.002208 -0.009636
0.009309 0.009225 0.008667 0.009705 [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 1.35e-08 1.42e-08 1.06e-08 1.27e-08 4.32e-08 5.13e-08 erg/cm2
Error 3.68e-09 4.12e-09 5.62e-09 1.38e-08 1.40e-08 2.18e-08 erg/cm2
Peak flux Power-law 2.17e-01 1.27e-01 4.73e-02 2.33e-02 4.03e-01 4.14e-01 ph/cm2/s
Error 6.00e-02 3.56e-02 2.44e-02 2.16e-02 1.00e-01 1.05e-01 ph/cm2/s
Fluence Cutoff-PL 1.40e-08 1.82e-08 2.09e-09 4.04e-12 3.43e-08 3.43e-08 erg/cm2
Error 4.08e-09 5.87e-09 4.64e-09 5.49e-10 9.45e-09 9.45e-09 erg/cm2
Peak flux Cutoff-PL 2.17e-01 1.69e-01 1.11e-02 1.18e-05 3.97e-01 3.97e-01 ph/cm2/s
Error 6.40e-02 4.90e-02 2.21e-02 1.41e-03 8.99e-02 8.99e-02 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 2.08e-01 1.68e-01 2.19e-02 4.08e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 5.56e-02 3.67e-02 1.37e-02 1.03e-01 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 2.426 0.480 - - 2.15e-03 8.65e-04 60.160 57
CPL -4.822 0.000 26.3 4.0 3.35e+02 2.07e+02 52.540 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.426 0.480 - - 2.15e-03 8.65e-04 60.160 57
CPL -4.822 0.000 26.3 4.0 3.35e+02 2.07e+02 52.540 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 2.048 0.000 2.048
T90 2.048 0.000 2.048
T50 2.048 0.000 2.048
Peak 2.048 -0.000 2.048
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.9954 -22.4330 0.0476 5.6 -118.5 0.0758 4.0 TRIG_00375058
------------------------------------------
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-152.663 -9.664 (delta_t = 142.999 [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 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42591 ( -0.438764 0.521073 )
Norm@50keV : 2.14714E-03 ( -0.000843173 0.000886932 )
------------------------------------------------------------
# Chi-Squared = 60.16 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.621556e-01
Photon flux (15-150 keV) in 2.048 sec: 0.403403 ( -0.0997954 0.100684 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.31573e-08 ( -1.32402e-08 1.4769e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.82198 ( )
Epeak [keV] : 26.3260 ( -3.68312 4.35917 )
Norm@50keV : 335.499 ( -335.568 77.7118 )
------------------------------------------------------------
# Chi-Squared = 52.54 using 59 PHA bins.
# Reduced chi-squared = 0.9382 for 56 degrees of freedom
# Null hypothesis probability = 6.067170e-01
Photon flux (15-150 keV) in 2.048 sec: 0.397068 ( -0.089927 0.089971 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43351e-08 ( -8.43756e-09 1.04526e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98406 ( -131.795 -121.795 )
beta : -4.03301 ( 4.05715 1.34709 )
Epeak [keV] : 25.6153 ( -4.2127 4.31268 )
Norm@50keV : 520.280 ( -530.744 158.875 )
------------------------------------------------------------
# Chi-Squared = 51.61 using 59 PHA bins.
# Reduced chi-squared = 0.9383 for 55 degrees of freedom
# Null hypothesis probability = 6.051275e-01
Photon flux (15-150 keV) in 2.048 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 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42591 ( -0.438764 0.521073 )
Norm@50keV : 2.14714E-03 ( -0.000843173 0.000886932 )
------------------------------------------------------------
# Chi-Squared = 60.16 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.621556e-01
Photon flux (15-150 keV) in 2.048 sec: 0.403403 ( -0.0997954 0.100684 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.31573e-08 ( -1.32402e-08 1.4769e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.82198 ( )
Epeak [keV] : 26.3260 ( -3.68312 4.35917 )
Norm@50keV : 335.499 ( -335.568 77.7118 )
------------------------------------------------------------
# Chi-Squared = 52.54 using 59 PHA bins.
# Reduced chi-squared = 0.9382 for 56 degrees of freedom
# Null hypothesis probability = 6.067170e-01
Photon flux (15-150 keV) in 2.048 sec: 0.397068 ( -0.089927 0.089971 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43351e-08 ( -8.43756e-09 1.04526e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98406 ( -131.795 -121.795 )
beta : -4.03301 ( 4.05715 1.34709 )
Epeak [keV] : 25.6153 ( -4.2127 4.31268 )
Norm@50keV : 520.280 ( -530.744 158.875 )
------------------------------------------------------------
# Chi-Squared = 51.61 using 59 PHA bins.
# Reduced chi-squared = 0.9383 for 55 degrees of freedom
# Null hypothesis probability = 6.051275e-01
Photon flux (15-150 keV) in 2.048 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Nov 6 13:10:17 EST 2009