batgrbproduct Analysis for Trigger=603810
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): Wed Jul 9 09:30:07 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger603810/batgroup_hand_proc
======================================================================
Trigger: 00603810 Segment: 000
BAT Trigger Time: 426561233.408 [s; MET]
Trigger Stop: 426561234.432 [s; MET]
UTC: 2014-07-09T01:13:41.167180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 304.638752617788 Dec: 51.2230855104488 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.54
Image Trigger?: NO
Rate S/N Ratio: 20.1246117974981 [ if not an image trigger ]
Image S/N Ratio: 12.54
Flight Position: [ source = BAT ]
RA: 304.638752617788 Dec: 51.2230855104488 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 304.666060052446 Dec: 51.2216113392899 [deg; J2000]
{ 20h 18m 39.9s , +51d 13' 17.8" }
+/- 0.769650689132371 [arcmin] (estimated 90% radius based on SNR)
+/- 0.323444912268411 [arcmin] (formal 1-sigma fit error)
SNR: 44.2136129311941
Angular difference between Flight and Ground position is 1.029963 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 98.6039999723434 +/- 7.72893802254728
Measured from: -25.4679999947548
to: 73.1359999775887 [s; relative to TRIGTIME]
T50: 24.7879999279976 +/- 1.73129779493771
Measured from: -6.72399997711182
to: 18.0639999508858 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 15.4760000109673
to: 16.4760000109673 [s; relative to TRIGTIME]
Total Fluence
Measured from: -46.0799999833107
to: 93.4160000085831 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.664053 3.408517 2.303895 0.522835
0.087923 0.087966 0.076791 0.064105 [error]
Peak 0.092755 0.140213 0.111961 0.024144
0.009924 0.010390 0.008951 0.006705 [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 9.34e-07 1.48e-06 1.77e-06 4.12e-06 5.38e-06 8.31e-06 erg/cm2
Error 5.59e-08 5.21e-08 7.73e-08 3.94e-07 1.85e-07 4.47e-07 erg/cm2
Peak flux Power-law 1.02e+00 1.02e+00 7.18e-01 8.02e-01 3.08e+00 3.56e+00 ph/cm2/s
Error 1.41e-01 9.01e-02 7.14e-02 1.58e-01 2.59e-01 2.92e-01 ph/cm2/s
Fluence Cutoff-PL 8.40e-07 1.54e-06 1.83e-06 2.16e-06 5.19e-06 6.37e-06 erg/cm2
Error 7.16e-08 6.03e-08 8.56e-08 6.88e-07 2.09e-07 7.17e-07 erg/cm2
Peak flux Cutoff-PL 8.47e-01 1.13e+00 7.81e-01 -------- 2.97e+00 3.06e+00 ph/cm2/s
Error 1.70e-01 1.15e-01 8.56e-02 -------- 2.68e-01 3.17e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.742 0.061 - - 4.18e-03 1.40e-04 69.090 57
CPL 1.235 0.272 78.0 20.4 7.34e-03 2.22e-03 57.800 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 1.507 0.132 - - 2.46e-02 2.03e-03 65.950 57
CPL 0.454 0.693 73.1 25.0 8.43e-02 7.92e-02 57.120 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: 548.096000 sec.
T50 in the 50-300 keV band: 327.616000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 139.496 -46.080 93.416
T90 98.604 -25.468 73.136
T50 24.788 -6.724 18.064
Peak 1.000 15.476 16.476
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
304.6661 51.2216 0.0043 36.8546 -4.4803 6.2647692 44.214 TRIG_00603810
Foreground time interval of the image:
-46.080 15.693 (delta_t = 61.773 [sec])
Background time interval of the image:
-239.408 -46.080 (delta_t = 193.328 [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 -46.080 sec. to 93.416 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74240 ( -0.0608261 0.0612451 )
Norm@50keV : 4.17619E-03 ( -0.000139636 0.00013943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.308741e-01
Photon flux (15-150 keV) in 139.5 sec: 0.563118 ( -0.0201858 0.0202549 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37809e-06 ( -1.84856e-07 1.8517e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -46.080 sec. to 93.416 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23460 ( -0.280491 0.264005 )
Epeak [keV] : 78.0304 ( -11.5129 29.3646 )
Norm@50keV : 7.34069E-03 ( -0.00182706 0.00262248 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.80 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 56 degrees of freedom
# Null hypothesis probability = 4.087169e-01
Photon flux (15-150 keV) in 139.5 sec: 0.542747 ( -0.022366 0.022478 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19059e-06 ( -2.09641e-07 2.09138e-07 ) ergs/cm2
Band function
Time interval is from -46.080 sec. to 93.416 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23468 ( -0.242336 0.220773 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 78.0210 ( -9.34051 29.352 )
Norm@50keV : 7.33926E-03 ( -0.00182899 0.00262408 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.80 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.723611e-01
Photon flux (15-150 keV) in 139.5 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] : 14.1373 ( )
R^2/D10^2 : 7.29109E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 213.27 using 59 PHA bins.
# Reduced chi-squared = 3.7416 for 57 degrees of freedom
# Null hypothesis probability = 6.678824e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.290e-07 2.762e-08
25- 50 1.611e-06 7.115e-08
50-150 2.131e-06 1.444e-07
15-150 4.171e-06 1.486e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 133.527 (-20.7127 19.7634)
Norm : 2.30079 (-0.0954276 0.128552)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.273484e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.314e-07 5.643e-08
25- 50 1.514e-06 8.084e-08
50-150 2.842e-06 6.933e-07
15-150 5.187e-06 7.428e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.07101 (-1.25085 1.28071)
R1^2/D10^2 : 0.553336 (-0.225528 0.541055)
kT2 [keV] : 22.6935 (-2.95928 4.4558)
R2^2/D10^2 : 9.63382E-03 (-0.00495272 0.00767515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.40 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 55 degrees of freedom
# Null hypothesis probability = 7.891348e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.527e-07 1.030e-07
25- 50 1.555e-06 1.565e-07
50-150 2.766e-06 3.250e-07
15-150 5.073e-06 5.357e-07
Peak spectrum fit
Power-law model
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50748 ( -0.131629 0.132228 )
Norm@50keV : 2.45903E-02 ( -0.00203282 0.00202872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.95 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 57 degrees of freedom
# Null hypothesis probability = 1.949452e-01
Photon flux (15-150 keV) in 1 sec: 3.07604 ( -0.258622 0.259058 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32995e-07 ( -2.06059e-08 2.07042e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.453699 ( -0.752136 0.633607 )
Epeak [keV] : 73.0779 ( -12.9139 37.1445 )
Norm@50keV : 8.42500E-02 ( -0.0434449 0.114871 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 56 degrees of freedom
# Null hypothesis probability = 4.333396e-01
Photon flux (15-150 keV) in 1 sec: 2.96644 ( -0.26829 0.26781 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.35652E-02 ( -0.830163 1.7831 )
beta : -2.22923 ( 2.22731 0.518498 )
Epeak [keV] : 63.0277 ( -21.3305 30.2504 )
Norm@50keV : 0.135670 ( -0.0811316 1.81189 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Null hypothesis probability = 4.450717e-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] : 14.7989 (-1.23798 1.38291)
R^2/D10^2 : 0.383606 (-0.106349 0.142324)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.13 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 57 degrees of freedom
# Null hypothesis probability = 9.875987e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.763e-08 2.665e-09
25- 50 6.916e-08 6.925e-09
50-150 1.025e-07 1.572e-08
15-150 1.893e-07 1.850e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-57.5584 -199.363)
Norm : 12.7174 (-1.0292 1.02969)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.66 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.131170e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.167e-08 2.940e-09
25- 50 6.092e-08 7.175e-09
50-150 1.336e-07 4.138e-08
15-150 2.262e-07 5.490e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.0809 ( )
R1^2/D10^2 : 0.818698 (-0.353963 5.71878)
kT2 [keV] : 38.7861 (-20.9876 -38.2222)
R2^2/D10^2 : 7.12909E-03 (-0.00683072 0.189633)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.46 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.43 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 55 degrees of freedom
# Reduced chi-squared = 1.044 for 55 degrees of freedom
# Null hypothesis probability = 3.841294e-01
# Null hypothesis probability = 3.853578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.293e-08 6.205e-09
25- 50 6.918e-08 2.302e-08
50-150 1.296e-07 6.401e-08
15-150 2.217e-07 8.556e-08
Plot creation:
Wed Jul 9 10:49:02 EDT 2014