batgrbproduct Analysis for Trigger=607742
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 Aug 1 13:47:29 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger607742/batgroup_hand_proc
======================================================================
Trigger: 00607742 Segment: 000
BAT Trigger Time: 428442243.648 [s; MET]
Trigger Stop: 428442245.696 [s; MET]
UTC: 2014-07-30T19:43:51.315580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 56.430725282402 Dec: -66.5388247653078 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.36
Image Trigger?: NO
Rate S/N Ratio: 13.7840487520902 [ if not an image trigger ]
Image S/N Ratio: 7.36
Flight Position: [ source = BAT ]
RA: 56.430725282402 Dec: -66.5388247653078 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 56.3500096376485 Dec: -66.5802010362801 [deg; J2000]
{ 03h 45m 24.0s , -66d 34' 48.7" }
+/- 2.12350966709243 [arcmin] (estimated 90% radius based on SNR)
+/- 1.21981703170393 [arcmin] (formal 1-sigma fit error)
SNR: 10.3728484711798
Angular difference between Flight and Ground position is 3.142387 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 41.2799999713898 +/- 3.66536218104199
Measured from: -13.0799999833107
to: 28.1999999880791 [s; relative to TRIGTIME]
T50: 20.160000026226 +/- 13.1790282214932
Measured from: -8.79199999570847
to: 11.3680000305176 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.17199999094009
to: 2.17199999094009 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.527999997139
to: 29.6079999804497 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.329024 0.230021 0.077976 0.007866
0.031969 0.031497 0.028131 0.025876 [error]
Peak 0.028996 0.025553 0.014221 0.001339
0.005172 0.005116 0.004514 0.004019 [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 9.09e-08 9.17e-08 6.51e-08 7.34e-08 2.77e-07 3.21e-07 erg/cm2
Error 1.51e-08 1.53e-08 2.23e-08 4.71e-08 5.14e-08 7.97e-08 erg/cm2
Peak flux Power-law 2.18e-01 1.74e-01 9.34e-02 7.32e-02 5.19e-01 5.59e-01 ph/cm2/s
Error 6.56e-02 3.89e-02 3.38e-02 4.99e-02 1.15e-01 1.29e-01 ph/cm2/s
Fluence Cutoff-PL 8.93e-08 9.76e-08 5.64e-08 1.99e-08 2.57e-07 2.63e-07 erg/cm2
Error 1.58e-08 1.95e-08 2.23e-08 6.01e-08 5.88e-08 9.42e-08 erg/cm2
Peak flux Cutoff-PL 2.02e-01 1.96e-01 9.21e-02 2.18e-02 5.07e-01 5.12e-01 ph/cm2/s
Error 7.20e-02 5.09e-02 4.16e-02 4.74e-02 8.67e-02 1.24e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.05e-01 1.92e-01 -------- -------- -------- 5.20e-01 ph/cm2/s
Error 5.06e-02 -------- -------- -------- -------- 1.25e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.495 0.324 - - 6.42e-04 1.61e-04 65.800 57
CPL 1.860 0.000 7.6 0.0 1.66e-03 0.00e+00 65.080 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 1.897 0.395 - - 3.62e-03 1.01e-03 58.660 57
CPL 0.922 1.538 45.8 0.0 1.35e-02 0.00e+00 57.100 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 43.136 -13.528 29.608
T90 41.280 -13.080 28.200
T50 20.160 -8.792 11.368
Peak 1.000 1.172 2.172
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
56.3500 -66.5802 0.0185 2.6361 -73.4455 0.6612198 10.373 TRIG_00607742
Foreground time interval of the image:
-13.528 29.608 (delta_t = 43.136 [sec])
Background time interval of the image:
-408.347 -392.077 (delta_t = 16.270 [sec])
-239.648 -13.528 (delta_t = 226.120 [sec])
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 -13.528 sec. to 29.608 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49537 ( -0.302942 0.344942 )
Norm@50keV : 6.41775E-04 ( -0.000161126 0.00016124 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.80 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 57 degrees of freedom
# Null hypothesis probability = 1.986040e-01
Photon flux (15-150 keV) in 43.14 sec: 0.125717 ( -0.017307 0.0173198 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76507e-07 ( -4.99354e-08 5.29367e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.528 sec. to 29.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85955 ( )
Epeak [keV] : 7.57640 ( )
Norm@50keV : 1.66083E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.08 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 56 degrees of freedom
# Null hypothesis probability = 1.900176e-01
Photon flux (15-150 keV) in 43.14 sec: 0.123326 ( -0.017629 0.01785 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57279e-07 ( -5.29591e-08 6.45862e-08 ) ergs/cm2
Band function
Time interval is from -13.528 sec. to 29.608 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.92051 ( 1.9443 1.9443 )
beta : -10.0000 ( 10 2.30926e-14 )
Epeak [keV] : 4.75736 ( -3.64264 24.4324 )
Norm@50keV : 1.51438E-03 ( -0.00050936 0.0231209 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.09 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 55 degrees of freedom
# Null hypothesis probability = 1.657529e-01
Photon flux (15-150 keV) in 43.14 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] : 6.86937 (-1.10487 1.28174)
R^2/D10^2 : 0.251722 (-0.126957 0.273732)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.15 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.343478e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.069e-08 2.112e-08
25- 50 1.065e-07 2.711e-08
50-150 1.648e-08 8.432e-09
15-150 2.037e-07 4.228e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.7521 (-9.22123 14.7428)
Norm : 0.984784 (-0.262394 0.401114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.41 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 57 degrees of freedom
# Null hypothesis probability = 2.078734e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.755e-08 1.667e-08
25- 50 1.014e-07 2.155e-08
50-150 5.735e-08 2.958e-08
15-150 2.463e-07 5.270e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.97320 (-2.00551 1.99823)
R1^2/D10^2 : 1.75317 (-1.36659 76.8103)
kT2 [keV] : 11.6851 (-3.79251 12.4663)
R2^2/D10^2 : 1.92802E-02 (-0.0184753 0.099)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.02 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 55 degrees of freedom
# Null hypothesis probability = 1.671945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.053e-08 4.860e-08
25- 50 9.662e-08 5.045e-08
50-150 5.916e-08 3.753e-08
15-150 2.463e-07 1.274e-07
Peak spectrum fit
Power-law model
Time interval is from 1.172 sec. to 2.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89671 ( -0.373927 0.415756 )
Norm@50keV : 3.61954E-03 ( -0.0010299 0.000996519 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.142854e-01
Photon flux (15-150 keV) in 1 sec: 0.518719 ( -0.115448 0.115458 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3279e-08 ( -8.98372e-09 9.46248e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.172 sec. to 2.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.921517 ( -1.89849 1.17726 )
Epeak [keV] : 45.7660 ( )
Norm@50keV : 1.34714E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 56 degrees of freedom
# Null hypothesis probability = 4.339178e-01
Photon flux (15-150 keV) in 1 sec: 0.507155 ( -0.114696 0.058734 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05427e-08 ( -8.9776e-09 9.9818e-09 ) ergs/cm2
Band function
Time interval is from 1.172 sec. to 2.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89505 ( -7.58425 -4.89505 )
beta : -2.20548 ( -0.924532 0.508235 )
Epeak [keV] : 24.5478 ( -24.5478 7.0205 )
Norm@50keV : 553.441 ( -120.577 3.84837e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.31 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.254916e-01
Photon flux (15-150 keV) in 1 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] : 9.67794 (-2.58458 3.92792)
R^2/D10^2 : 0.279362 (-0.199033 0.625485)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.24 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 57 degrees of freedom
# Null hypothesis probability = 3.265201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.265e-09 2.552e-09
25- 50 1.249e-08 5.692e-09
50-150 5.925e-09 3.374e-09
15-150 2.368e-08 1.041e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.0811 (-35.5646 115.486)
Norm : 2.53854 (-0.690242 1.03424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.29 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.641551e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.549e-09 2.115e-09
25- 50 1.058e-08 5.415e-09
50-150 1.416e-08 1.165e-08
15-150 3.128e-08 1.866e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.77839 (-2.23019 2.87672)
R1^2/D10^2 : 1.34401 (-1.02929 7.09608)
kT2 [keV] : 19.1160 (-7.3381 18.606)
R2^2/D10^2 : 1.53546E-02 (-0.0140338 0.0906124)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.57 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.529995e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.738e-09 3.985e-09
25- 50 1.049e-08 5.195e-09
50-150 1.470e-08 8.955e-09
15-150 3.192e-08 1.681e-08
Plot creation:
Fri Aug 1 14:08:02 EDT 2014