batgrbproduct Analysis for Trigger=511289
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Jan 8 01:59:36 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger511289/GCN5_download_cron
======================================================================
Trigger: 00511289 Segment: 000
BAT Trigger Time: 347649120 [s; MET]
Trigger Stop: 347650264 [s; MET]
UTC: 2012-01-07T17:11:52.241420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 51.6121748078427 Dec: 28.6961877412351 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.51
Flight Position: [ source = BAT ]
RA: 51.6121748078427 Dec: 28.6961877412351 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 51.5932524351743 Dec: 28.6476150132847 [deg; J2000]
{ 03h 26m 22.4s , +28d 38' 51.4" }
+/- 4.18013076428851 [arcmin] (estimated 90% radius based on SNR)
+/- 2.12601845871214 [arcmin] (formal 1-sigma fit error)
SNR: 3.94188802373393
Angular difference between Flight and Ground position is 3.079901 arcmin
Partial Coding Fraction: 0.4960938 [ including projection effects ]
Duration
T90: 1144 +/-
Measured from: 0
to: 1144 [s; relative to TRIGTIME]
T50: 1144 +/-
Measured from: 0
to: 1144 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1144 second)
Measured from: 0
to: 1144 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1144 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.180983 0.873383 0.222700 0.661939
0.254293 0.261118 0.230910 0.208941 [error]
Peak 2.180983 0.873383 0.222700 0.661939
0.254293 0.261118 0.230910 0.208941 [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 6.26e-07 4.71e-07 2.36e-07 1.69e-07 1.41e-06 1.50e-06 erg/cm2
Error 1.32e-07 1.41e-07 1.45e-07 2.21e-07 3.86e-07 4.88e-07 erg/cm2
Peak flux Power-law 2.16e-02 9.16e-03 2.30e-03 7.06e-04 3.35e-02 3.38e-02 ph/cm2/s
Error 4.67e-03 2.61e-03 1.37e-03 8.72e-04 6.83e-03 6.97e-03 ph/cm2/s
Fluence Cutoff-PL 7.32e-07 3.50e-07 1.13e-09 1.08e-16 1.08e-06 1.08e-06 erg/cm2
Error 1.57e-07 1.90e-07 2.45e-08 1.06e-10 2.44e-07 2.44e-07 erg/cm2
Peak flux Cutoff-PL 2.44e-02 7.66e-03 1.38e-05 6.87e-13 3.21e-02 3.21e-02 ph/cm2/s
Error 5.39e-03 3.70e-03 2.74e-04 6.51e-07 6.34e-03 6.34e-03 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 2.996 0.530 - - 1.22e-04 5.67e-05 69.260 57
CPL 1.000 0.000 50.0 0.0 6.25e-04 0.00e+00 90.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.996 0.530 - - 1.22e-04 5.67e-05 69.260 57
CPL 1.000 0.000 50.0 0.0 6.25e-04 0.00e+00 90.810 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 1144.000 0.000 1144.000
T90 1144.000 0.000 1144.000
T50 1144.000 0.000 1144.000
Peak 1144.000 0.000 1144.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
51.5933 +28.6476 0.0488 36.6 164.7 3.4032 3.9 TRIG_00511289
------------------------------------------
Foreground time interval of the image:
0.000 559.220 (delta_t = 559.220 [sec])
560.000 963.050 (delta_t = 403.050 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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
Multiple GTIs in the spectrum
tstart tstop
0.000000 559.220000
560.000000 963.050000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.99551 ( -0.48425 0.575979 )
Norm@50keV : 1.22315E-04 ( -5.26548e-05 6.07324e-05 )
------------------------------------------------------------
# Chi-Squared = 69.26 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.278762e-01
Photon flux (15-150 keV) in 962.3 sec: 3.35282E-02 ( -0.00681099 0.0068448 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41139e-06 ( -3.64066e-07 4.08832e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 559.220000
560.000000 963.050000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.25009E-04 ( )
------------------------------------------------------------
# Chi-Squared = 90.81 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 56 degrees of freedom
# Null hypothesis probability = 2.240522e-03
Photon flux (15-150 keV) in 962.3 sec: 3.20846E-02 ( -0.0063035 0.0063842 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08273e-06 ( -2.27579e-07 2.60119e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 559.220000
560.000000 963.050000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98298 ( -124.236 -114.236 )
beta : -5.46476 ( 5.14628 1.8178 )
Epeak [keV] : 20.5349 ( -2.96778 2.80106 )
Norm@50keV : 213.711 ( -131.533 2104.99 )
------------------------------------------------------------
# Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 55 degrees of freedom
# Null hypothesis probability = 2.414051e-01
Photon flux (15-150 keV) in 962.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.89411 (-0.784735 0.934506)
R^2/D10^2 : 0.326542 (-0.181972 0.425547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 57 degrees of freedom
# Null hypothesis probability = 2.638439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.009e-07 2.986e-07
25- 50 4.341e-07 2.173e-07
50-150 1.589e-08 1.295e-08
15-150 1.151e-06 5.110e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1037 (-4.69363 7.75956)
Norm : 0.592102 (-0.248472 0.43506)
------------------------------------------------------------
# Chi-Squared = 66.54 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.814452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.674e-07 2.596e-07
25- 50 4.580e-07 2.191e-07
50-150 8.182e-08 6.854e-08
15-150 1.207e-06 4.714e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.74450 (-0.784749 0.934492)
R1^2/D10^2 : 0.369756 (-0.181968 0.425552)
kT2 [keV] : 199.319 ( )
R2^2/D10^2 : 2.88230E-06 (-2.09538e-06 4.71992e-05)
------------------------------------------------------------
# Chi-Squared = 63.30 using 59 PHA bins.
# Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 2.067964e-01
# Null hypothesis probability = 3.569177e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 560.000 sec. to 963.050 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.99551 ( -0.48425 0.575979 )
Norm@50keV : 1.22315E-04 ( -5.26548e-05 6.07324e-05 )
------------------------------------------------------------
# Chi-Squared = 69.26 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.278762e-01
Photon flux (15-150 keV) in 962.3 sec: 3.35282E-02 ( -0.00681099 0.0068448 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41139e-06 ( -3.64066e-07 4.08832e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 560.000 sec. to 963.050 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.25009E-04 ( )
------------------------------------------------------------
# Chi-Squared = 90.81 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 56 degrees of freedom
# Null hypothesis probability = 2.240522e-03
Photon flux (15-150 keV) in 962.3 sec: 3.20846E-02 ( -0.0063035 0.0063842 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08273e-06 ( -2.27579e-07 2.60119e-07 ) ergs/cm2
Band function
Time interval is from 560.000 sec. to 963.050 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98298 ( -124.236 -114.236 )
beta : -5.46476 ( 5.14628 1.8178 )
Epeak [keV] : 20.5349 ( -2.96778 2.80106 )
Norm@50keV : 213.711 ( -131.533 2104.99 )
------------------------------------------------------------
# Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 55 degrees of freedom
# Null hypothesis probability = 2.414051e-01
Photon flux (15-150 keV) in 962.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.89411 (-0.784735 0.934506)
R^2/D10^2 : 0.326542 (-0.181972 0.425547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 57 degrees of freedom
# Null hypothesis probability = 2.638439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.009e-07 3.148e-07
25- 50 4.341e-07 2.082e-07
50-150 1.589e-08 1.377e-08
15-150 1.151e-06 5.201e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1037 (-4.69363 7.75956)
Norm : 0.592102 (-0.248472 0.43506)
------------------------------------------------------------
# Chi-Squared = 66.54 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.814452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.674e-07 2.277e-07
25- 50 4.580e-07 2.211e-07
50-150 8.182e-08 7.183e-08
15-150 1.207e-06 4.235e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.74450 (-0.784749 0.934492)
R1^2/D10^2 : 0.369756 (-0.181968 0.425552)
kT2 [keV] : 199.319 ( )
R2^2/D10^2 : 2.88230E-06 (-2.09538e-06 4.71992e-05)
------------------------------------------------------------
# Chi-Squared = 63.30 using 59 PHA bins.
# Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 2.067964e-01
# Null hypothesis probability = 3.569177e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Jan 8 02:16:37 EST 2012