batgrbproduct Analysis for Trigger=593744
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): Thu Apr 3 10:09:01 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger593744/batgroup_hand_proc
======================================================================
Trigger: 00593744 Segment: 000
BAT Trigger Time: 417799136 [s; MET]
Trigger Stop: 417799200 [s; MET]
UTC: 2014-03-29T15:18:44.179720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 24.7638912239798 Dec: -17.9613528389166 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.28
Flight Position: [ source = BAT ]
RA: 24.7638912239798 Dec: -17.9613528389166 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 24.8144827059056 Dec: -17.9717803981577 [deg; J2000]
{ 01h 39m 15.5s , -17d 58' 18.4" }
+/- 3.17204616431427 [arcmin] (estimated 90% radius based on SNR)
+/- 2.37657784973292 [arcmin] (formal 1-sigma fit error)
SNR: 5.84681153949899
Angular difference between Flight and Ground position is 2.954474 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.409406 0.184844 0.019366 0.020621
0.060438 0.060422 0.057298 0.059268 [error]
Peak 0.409406 0.184844 0.019366 0.020621
0.060438 0.060422 0.057298 0.059268 [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 1.34e-07 7.68e-08 2.78e-08 1.33e-08 2.46e-07 2.52e-07 erg/cm2
Error 3.05e-08 3.38e-08 2.64e-08 2.61e-08 8.02e-08 9.19e-08 erg/cm2
Peak flux Power-law 7.05e-02 2.29e-02 4.14e-03 8.73e-04 9.81e-02 9.84e-02 ph/cm2/s
Error 1.63e-02 9.55e-03 3.80e-03 1.60e-03 2.32e-02 2.35e-02 ph/cm2/s
Fluence Cutoff-PL 1.39e-07 7.39e-08 8.74e-09 1.41e-10 2.26e-07 2.22e-07 erg/cm2
Error 3.33e-08 4.74e-08 2.86e-08 2.25e-08 8.31e-08 9.26e-08 erg/cm2
Peak flux Cutoff-PL 7.23e-02 2.26e-02 1.43e-03 1.23e-05 9.63e-02 9.63e-02 ph/cm2/s
Error 1.74e-02 1.13e-02 3.88e-03 5.66e-04 2.27e-02 2.30e-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 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 3.466 0.789 - - 2.49e-04 1.78e-04 42.370 57
CPL 1.484 0.000 6.3 0.0 8.51e-03 0.00e+00 41.990 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 3.466 0.789 - - 2.49e-04 1.78e-04 42.370 57
CPL 1.484 0.000 6.3 0.0 8.51e-03 0.00e+00 41.990 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
24.8145 -17.9718 0.0329 29.6379 -115.4306 0.7215780 5.847 TRIG_00593744
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.46595 ( -0.680084 0.898644 )
Norm@50keV : 2.49253E-04 ( -0.000150515 0.00020564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.37 using 59 PHA bins.
# Reduced chi-squared = 0.7433 for 57 degrees of freedom
# Null hypothesis probability = 9.258325e-01
Photon flux (15-150 keV) in 64 sec: 9.80691E-02 ( -0.0230884 0.0233346 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45875e-07 ( -7.36781e-08 8.67923e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48354 ( )
Epeak [keV] : 6.30510 ( )
Norm@50keV : 8.50639E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.99 using 59 PHA bins.
# Reduced chi-squared = 0.7498 for 56 degrees of freedom
# Null hypothesis probability = 9.176845e-01
Photon flux (15-150 keV) in 64 sec: 9.62925E-02 ( -0.0221177 0.0232355 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25721e-07 ( -6.60794e-08 1.00211e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.45056 ( 5.76249 6.45056 )
beta : -3.46602 ( -0.89668 0.680334 )
Epeak [keV] : 35.6789 ( -35.6789 -35.6789 )
Norm@50keV : 3.38750E-02 ( -0.020456 0.0279505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.37 using 59 PHA bins.
# Reduced chi-squared = 0.7703 for 55 degrees of freedom
# Null hypothesis probability = 8.937428e-01
Photon flux (15-150 keV) in 64 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] : 4.24866 (-0.980911 1.21946)
R^2/D10^2 : 1.85084 (-1.85108 5.46884)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.85 using 59 PHA bins.
# Reduced chi-squared = 0.7518 for 57 degrees of freedom
# Null hypothesis probability = 9.177806e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.432e-07 8.310e-08
25- 50 6.121e-08 3.878e-08
50-150 1.059e-09 1.062e-09
15-150 2.055e-07 1.195e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7204 (-4.39182 7.96752)
Norm : 2.50174 (-1.30046 3.82417)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.99 using 59 PHA bins.
# Reduced chi-squared = 0.7367 for 57 degrees of freedom
# Null hypothesis probability = 9.316673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.393e-07 7.079e-08
25- 50 7.325e-08 4.021e-08
50-150 7.546e-09 7.119e-09
15-150 2.201e-07 1.139e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.77008 (-2.72744 -2.72744)
R1^2/D10^2 : 10.1965 (-11.7339 -11.7339)
kT2 [keV] : 6.10626 (-5.96391 -5.96391)
R2^2/D10^2 : 0.200418 (-0.245122 5.23264)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.92 using 59 PHA bins.
# Reduced chi-squared = 0.7622 for 55 degrees of freedom
# Null hypothesis probability = 9.027912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.382e-07 6.595e-08
25- 50 7.547e-08 4.208e-08
50-150 6.643e-09 5.120e-09
15-150 2.203e-07 1.092e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.46595 ( -0.680084 0.898644 )
Norm@50keV : 2.49253E-04 ( -0.000150515 0.00020564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.37 using 59 PHA bins.
# Reduced chi-squared = 0.7433 for 57 degrees of freedom
# Null hypothesis probability = 9.258325e-01
Photon flux (15-150 keV) in 64 sec: 9.80691E-02 ( -0.0230884 0.0233346 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45875e-07 ( -7.36781e-08 8.67923e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48354 ( )
Epeak [keV] : 6.30510 ( )
Norm@50keV : 8.50639E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.99 using 59 PHA bins.
# Reduced chi-squared = 0.7498 for 56 degrees of freedom
# Null hypothesis probability = 9.176845e-01
Photon flux (15-150 keV) in 64 sec: 9.62925E-02 ( -0.0221177 0.0232355 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25721e-07 ( -6.60794e-08 1.00211e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.45056 ( 5.76249 6.45056 )
beta : -3.46602 ( -0.89668 0.680334 )
Epeak [keV] : 35.6789 ( -35.6789 -35.6789 )
Norm@50keV : 3.38750E-02 ( -0.020456 0.0279505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.37 using 59 PHA bins.
# Reduced chi-squared = 0.7703 for 55 degrees of freedom
# Null hypothesis probability = 8.937428e-01
Photon flux (15-150 keV) in 64 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] : 4.24866 (-0.980911 1.21946)
R^2/D10^2 : 1.85084 (-1.85108 5.46884)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.85 using 59 PHA bins.
# Reduced chi-squared = 0.7518 for 57 degrees of freedom
# Null hypothesis probability = 9.177806e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.432e-07 7.987e-08
25- 50 6.121e-08 3.872e-08
50-150 1.059e-09 1.055e-09
15-150 2.055e-07 1.186e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7204 (-4.39182 7.96752)
Norm : 2.50174 (-1.30046 3.82417)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.99 using 59 PHA bins.
# Reduced chi-squared = 0.7367 for 57 degrees of freedom
# Null hypothesis probability = 9.316673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.393e-07 6.611e-08
25- 50 7.325e-08 4.304e-08
50-150 7.546e-09 7.112e-09
15-150 2.201e-07 1.133e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.77008 (-2.72744 -2.72744)
R1^2/D10^2 : 10.1965 (-11.7339 -11.7339)
kT2 [keV] : 6.10626 (-5.96391 -5.96391)
R2^2/D10^2 : 0.200418 (-0.245122 5.23264)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.92 using 59 PHA bins.
# Reduced chi-squared = 0.7622 for 55 degrees of freedom
# Null hypothesis probability = 9.027912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.382e-07 6.544e-08
25- 50 7.547e-08 3.936e-08
50-150 6.643e-09 4.966e-09
15-150 2.203e-07 1.189e-07
Plot creation:
Thu Apr 3 10:37:42 EDT 2014