batgrbproduct Analysis for Trigger=400107
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): Fri May 27 15:46:23 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger400107/SDC
======================================================================
Trigger: 00400107 Segment: 000
BAT Trigger Time: 286171688 [s; MET]
Trigger Stop: 286172032 [s; MET]
UTC: 2010-01-26T04:08:02.528080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 248.523435723718 Dec: -47.3810921054715 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.03
Flight Position: [ source = BAT ]
RA: 248.523435723718 Dec: -47.3810921054715 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 248.546349537085 Dec: -47.373443035686 [deg; J2000]
{ 16h 34m 11.1s , -47d 22' 24.4" }
+/- 3.39684934106775 [arcmin] (estimated 90% radius based on SNR)
+/- 2.06057174812124 [arcmin] (formal 1-sigma fit error)
SNR: 5.30197862475547
Angular difference between Flight and Ground position is 1.037965 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
T50: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 344 second)
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.516552 0.625031 0.116951 -0.040520
0.120371 0.105749 0.090587 0.077770 [error]
Peak 0.516552 0.625031 0.116951 -0.040520
0.120371 0.105749 0.090587 0.077770 [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 1.73e-07 2.04e-07 1.74e-07 2.51e-07 6.41e-07 8.03e-07 erg/cm2
Error 5.11e-08 5.02e-08 7.36e-08 2.04e-07 1.79e-07 3.05e-07 erg/cm2
Peak flux Power-law 1.65e-02 1.08e-02 4.59e-03 2.68e-03 3.32e-02 3.46e-02 ph/cm2/s
Error 4.96e-03 2.61e-03 1.88e-03 2.02e-03 7.83e-03 8.19e-03 ph/cm2/s
Fluence Cutoff-PL 1.48e-07 2.79e-07 8.95e-08 1.92e-09 5.18e-07 5.18e-07 erg/cm2
Error 5.97e-08 7.37e-08 9.66e-08 2.59e-08 1.44e-07 1.45e-07 erg/cm2
Peak flux Cutoff-PL 1.36e-02 1.48e-02 2.66e-03 3.15e-05 3.10e-02 3.10e-02 ph/cm2/s
Error 5.76e-03 3.83e-03 2.25e-03 3.69e-04 7.62e-03 7.62e-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 2.230 0.425 - - 1.97e-04 6.29e-05 54.560 57
CPL -1.192 3.482 32.7 7.3 2.92e-02 1.27e+01 48.270 56
The chi2 of BB fit is which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.230 0.425 - - 1.97e-04 6.29e-05 54.560 57
CPL -1.192 3.482 32.7 7.3 2.92e-02 1.27e+01 48.270 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 344.000 0.000 344.000
T90 344.000 0.000 344.000
T50 344.000 0.000 344.000
Peak 344.000 0.000 344.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
248.5463 -47.3734 0.0362 25.4 -2.8 1.5721 5.3 TRIG_00400107
------------------------------------------
Foreground time interval of the image:
0.000 344.000 (delta_t = 344.000 [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
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23030 ( -0.400278 0.449932 )
Norm@50keV : 1.97398E-04 ( -6.30576e-05 6.26637e-05 )
------------------------------------------------------------
# Chi-Squared = 54.56 using 59 PHA bins.
# Reduced chi-squared = 0.9572 for 57 degrees of freedom
# Null hypothesis probability = 5.671260e-01
Photon flux (15-150 keV) in 344 sec: 3.32106E-02 ( -0.00783028 0.00783157 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40783e-07 ( -1.74336e-07 1.84562e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.19235 ( -4.51022 2.45287 )
Epeak [keV] : 32.7488 ( -6.26468 8.29286 )
Norm@50keV : 2.91954E-02 ( -0.0333936 25.3075 )
------------------------------------------------------------
# Chi-Squared = 48.27 using 59 PHA bins.
# Reduced chi-squared = 0.8619 for 56 degrees of freedom
# Null hypothesis probability = 7.591638e-01
Photon flux (15-150 keV) in 344 sec: 3.10149E-02 ( -0.0075582 0.0076818 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.18264e-07 ( -1.3179e-07 1.56121e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.23209 ( -2.15222 -0.897989 )
beta : -9.99721 ( 1134.65 1144.63 )
Epeak [keV] : 32.7488 ( -9.02431 8.26816 )
Norm@50keV : 3.09729E-02 ( -0.0423883 4.07999 )
------------------------------------------------------------
# Chi-Squared = 48.26 using 59 PHA bins.
# Reduced chi-squared = 0.8775 for 55 degrees of freedom
# Null hypothesis probability = 7.279610e-01
Photon flux (15-150 keV) in 344 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23030 ( -0.400278 0.449932 )
Norm@50keV : 1.97398E-04 ( -6.30576e-05 6.26637e-05 )
------------------------------------------------------------
# Chi-Squared = 54.56 using 59 PHA bins.
# Reduced chi-squared = 0.9572 for 57 degrees of freedom
# Null hypothesis probability = 5.671260e-01
Photon flux (15-150 keV) in 344 sec: 3.32106E-02 ( -0.00783028 0.00783157 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.40783e-07 ( -1.74336e-07 1.84562e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.19235 ( -4.51022 2.45287 )
Epeak [keV] : 32.7488 ( -6.26468 8.29286 )
Norm@50keV : 2.91954E-02 ( -0.0333936 25.3075 )
------------------------------------------------------------
# Chi-Squared = 48.27 using 59 PHA bins.
# Reduced chi-squared = 0.8619 for 56 degrees of freedom
# Null hypothesis probability = 7.591638e-01
Photon flux (15-150 keV) in 344 sec: 3.10149E-02 ( -0.0075582 0.0076818 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.18264e-07 ( -1.3179e-07 1.56121e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.23209 ( -2.15222 -0.897989 )
beta : -9.99721 ( 1134.65 1144.63 )
Epeak [keV] : 32.7488 ( -9.02431 8.26816 )
Norm@50keV : 3.09729E-02 ( -0.0423883 4.0798 )
------------------------------------------------------------
# Chi-Squared = 48.26 using 59 PHA bins.
# Reduced chi-squared = 0.8775 for 55 degrees of freedom
# Null hypothesis probability = 7.279610e-01
Photon flux (15-150 keV) in 344 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Plot creation:
Fri May 27 16:22:08 EDT 2011