batgrbproduct Analysis for Trigger=664610
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): Mon Nov 23 00:28:27 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger664610/GCN5_download_cron
======================================================================
Trigger: 00664610 Segment: 000
BAT Trigger Time: 469874960 [s; MET]
Trigger Stop: 469875024 [s; MET]
UTC: 2015-11-22T08:49:04.550460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 184.205046519105 Dec: 17.5986474910626 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.9
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.9
Flight Position: [ source = BAT ]
RA: 184.205046519105 Dec: 17.5986474910626 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 184.191761813747 Dec: 17.6363274781889 [deg; J2000]
{ 12h 16m 46.0s , +17d 38' 10.8" }
+/- 4.73955553684929 [arcmin] (estimated 90% radius based on SNR)
+/- 3.07312961144722 [arcmin] (formal 1-sigma fit error)
SNR: 3.29441971099407
Angular difference between Flight and Ground position is 2.385027 arcmin
Partial Coding Fraction: 0.7578125 [ 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 0.222664 0.198923 -0.031286 0.063542
0.051627 0.053803 0.047874 0.044735 [error]
Peak 0.222664 0.198923 -0.031286 0.063542
0.051627 0.053803 0.047874 0.044735 [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 5.84e-08 6.63e-08 5.39e-08 7.31e-08 2.05e-07 2.51e-07 erg/cm2
Error 2.27e-08 2.49e-08 3.54e-08 1.02e-07 8.81e-08 1.47e-07 erg/cm2
Peak flux Power-law 2.99e-02 1.89e-02 7.67e-03 4.22e-03 5.86e-02 6.07e-02 ph/cm2/s
Error 1.18e-02 6.92e-03 4.88e-03 5.49e-03 1.99e-02 2.09e-02 ph/cm2/s
Fluence Cutoff-PL 4.97e-08 9.95e-08 3.41e-08 7.89e-10 1.84e-07 1.84e-07 erg/cm2
Error 3.86e-08 3.87e-08 3.75e-08 1.17e-08 6.49e-08 6.51e-08 erg/cm2
Peak flux Cutoff-PL 2.45e-02 2.82e-02 5.43e-03 6.92e-05 5.81e-02 5.82e-02 ph/cm2/s
Error 1.94e-02 1.05e-02 5.62e-03 8.69e-04 1.90e-02 1.91e-02 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 2.305 0.635 - - 3.35e-04 1.68e-04 80.880 57
CPL -1.371 4.444 33.5 13.7 6.65e-02 5.67e+01 76.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.305 0.635 - - 3.35e-04 1.68e-04 80.880 57
CPL -1.371 4.444 33.5 13.7 6.65e-02 5.67e+01 76.420 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 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.1918 +17.6363 0.0584 30.1 9.5 0.3506 3.3 TRIG_00664610
------------------------------------------
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: 2.30452 ( -0.560753 0.710243 )
Norm@50keV : 3.34522E-04 ( -0.000165454 0.000170804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.88 using 59 PHA bins.
# Reduced chi-squared = 1.419 for 57 degrees of freedom
# Null hypothesis probability = 2.044940e-02
Photon flux (15-150 keV) in 64 sec: 5.86329E-02 ( -0.0198443 0.0199985 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05291e-07 ( -8.30074e-08 9.31302e-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: -1.37149 ( -5.88856 2.99851 )
Epeak [keV] : 33.5132 ( -17.0944 10.2672 )
Norm@50keV : 6.64761E-02 ( -0.0759432 113.259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.42 using 59 PHA bins.
# Reduced chi-squared = 1.365 for 56 degrees of freedom
# Null hypothesis probability = 3.623340e-02
Photon flux (15-150 keV) in 64 sec: 5.81079E-02 ( -0.0190967 0.0189906 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83619e-07 ( -6.13338e-08 6.84806e-08 ) 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 : 1.95346 ( -3.08652 -1.9045 )
beta : -9.04695 ( 8.95419 18.9429 )
Epeak [keV] : 34.4624 ( -9.58906 9.68661 )
Norm@50keV : 0.140603 ( -0.129044 10.8003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.43 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 55 degrees of freedom
# Null hypothesis probability = 2.955273e-02
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] : 8.73944 (-2.20166 2.55352)
R^2/D10^2 : 5.26353E-02 (-0.0526353 0.108323)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.31 using 59 PHA bins.
# Reduced chi-squared = 1.339 for 57 degrees of freedom
# Null hypothesis probability = 4.472970e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.930e-08 2.925e-08
25- 50 1.000e-07 6.099e-08
50-150 3.485e-08 2.858e-08
15-150 1.842e-07 1.168e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.8934 (-17.405 47.4241)
Norm : 0.428415 (-0.187714 0.340742)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.66 using 59 PHA bins.
# Reduced chi-squared = 1.380 for 57 degrees of freedom
# Null hypothesis probability = 3.019365e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.051e-08 3.600e-08
25- 50 7.580e-08 4.690e-08
50-150 5.187e-08 4.589e-08
15-150 1.882e-07 1.190e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.49676 (-3.34287 -3.34287)
R1^2/D10^2 : 0.381908 (-0.381527 -0.381527)
kT2 [keV] : 9.27774 (-2.55936 189.919)
R2^2/D10^2 : 3.83392E-02 (-0.0405714 0.114822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.17 using 59 PHA bins.
# Reduced chi-squared = 1.385 for 55 degrees of freedom
# Null hypothesis probability = 3.094540e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.288e-08 3.066e-08
25- 50 9.566e-08 6.314e-08
50-150 3.891e-08 2.422e-08
15-150 1.874e-07 1.131e-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: 2.30452 ( -0.560753 0.710243 )
Norm@50keV : 3.34522E-04 ( -0.000165454 0.000170804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.88 using 59 PHA bins.
# Reduced chi-squared = 1.419 for 57 degrees of freedom
# Null hypothesis probability = 2.044940e-02
Photon flux (15-150 keV) in 64 sec: 5.86329E-02 ( -0.0198443 0.0199985 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05291e-07 ( -8.30074e-08 9.31302e-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: -1.37149 ( -5.88856 2.99851 )
Epeak [keV] : 33.5132 ( -17.0944 10.2672 )
Norm@50keV : 6.64761E-02 ( -0.0759432 113.259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.42 using 59 PHA bins.
# Reduced chi-squared = 1.365 for 56 degrees of freedom
# Null hypothesis probability = 3.623340e-02
Photon flux (15-150 keV) in 64 sec: 5.81079E-02 ( -0.0190967 0.0189906 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83619e-07 ( -6.13338e-08 6.84806e-08 ) 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 : 1.95346 ( -3.08652 -1.9045 )
beta : -9.04695 ( 8.95419 18.9429 )
Epeak [keV] : 34.4624 ( -9.58906 9.68661 )
Norm@50keV : 0.140603 ( -0.129044 10.8003 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.43 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 55 degrees of freedom
# Null hypothesis probability = 2.955273e-02
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] : 8.73944 (-2.20166 2.55352)
R^2/D10^2 : 5.26353E-02 (-0.0526353 0.108323)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.31 using 59 PHA bins.
# Reduced chi-squared = 1.339 for 57 degrees of freedom
# Null hypothesis probability = 4.472970e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.930e-08 3.005e-08
25- 50 1.000e-07 6.304e-08
50-150 3.485e-08 2.693e-08
15-150 1.842e-07 1.179e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.8934 (-17.405 47.4241)
Norm : 0.428415 (-0.187714 0.340742)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.66 using 59 PHA bins.
# Reduced chi-squared = 1.380 for 57 degrees of freedom
# Null hypothesis probability = 3.019365e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.051e-08 3.746e-08
25- 50 7.580e-08 4.666e-08
50-150 5.187e-08 4.182e-08
15-150 1.882e-07 1.210e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.49676 (-3.34287 -3.34287)
R1^2/D10^2 : 0.381908 (-0.381527 -0.381527)
kT2 [keV] : 9.27774 (-2.55936 189.919)
R2^2/D10^2 : 3.83392E-02 (-0.0405714 0.114822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.17 using 59 PHA bins.
# Reduced chi-squared = 1.385 for 55 degrees of freedom
# Null hypothesis probability = 3.094540e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.288e-08 3.306e-08
25- 50 9.566e-08 6.131e-08
50-150 3.891e-08 3.015e-08
15-150 1.874e-07 1.173e-07
Plot creation:
Mon Nov 23 00:36:54 EST 2015