batgrbproduct Analysis for Trigger=702252
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 Jul 1 00:14:34 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger702252/GCN5_download_cron
======================================================================
Trigger: 00702252 Segment: 000
BAT Trigger Time: 488952266.432 [s; MET]
Trigger Stop: 488952267.456 [s; MET]
UTC: 2016-06-30T04:04:09.942380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.239285438184 Dec: -56.0685035261327 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.82
Image Trigger?: NO
Rate S/N Ratio: 17.8044938147649 [ if not an image trigger ]
Image S/N Ratio: 7.82
Flight Position: [ source = BAT ]
RA: 198.239285438184 Dec: -56.0685035261327 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 198.23762151237 Dec: -56.0289648664935 [deg; J2000]
{ 13h 12m 57.0s , -56d 01' 44.3" }
+/- 1.36775809763151 [arcmin] (estimated 90% radius based on SNR)
+/- 0.442510022328386 [arcmin] (formal 1-sigma fit error)
SNR: 19.4455122257986
Angular difference between Flight and Ground position is 2.372975 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 29.5040000081062 +/- 5.51118136655692
Measured from: -0.31199985742569
to: 29.1920001506805 [s; relative to TRIGTIME]
T50: 10.8800000548363 +/- 2.33502715804584
Measured from: 2.42400014400482
to: 13.3040001988411 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.419999957084656
to: 0.580000042915344 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1
to: 34.8880000114441 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.472389 0.646286 0.571482 0.170358
0.048991 0.048199 0.042003 0.035199 [error]
Peak 0.041476 0.033945 0.066152 0.015431
0.008738 0.009185 0.007965 0.006914 [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 1.36e-07 2.79e-07 4.46e-07 1.59e-06 1.24e-06 2.45e-06 erg/cm2
Error 1.98e-08 2.38e-08 4.07e-08 3.31e-07 1.01e-07 3.55e-07 erg/cm2
Peak flux Power-law 2.58e-01 3.65e-01 3.83e-01 7.40e-01 1.24e+00 1.75e+00 ph/cm2/s
Error 1.03e-01 8.51e-02 6.24e-02 2.99e-01 2.11e-01 3.03e-01 ph/cm2/s
Fluence Cutoff-PL 1.32e-07 2.82e-07 4.52e-07 1.29e-06 1.23e-06 2.15e-06 erg/cm2
Error 1.81e-08 2.66e-08 4.55e-08 5.92e-07 1.10e-07 5.62e-07 erg/cm2
Peak flux Cutoff-PL 2.66e-01 3.71e-01 3.81e-01 7.14e-01 1.25e+00 1.73e+00 ph/cm2/s
Error 1.05e-01 -------- 6.30e-02 3.38e-01 -------- 3.52e-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 1.321 0.136 - - 3.51e-03 2.62e-04 67.560 57
CPL 1.174 0.416 304.2 0.0 4.11e-03 2.08e-03 67.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.931 0.327 - - 1.08e-02 1.82e-03 61.990 57
CPL 2.012 -0.290 4.5 0.0 2.11e-03 0.00e+00 61.670 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: 14.720000 sec.
T50 in the 50-300 keV band: 6.976000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 35.888 -1.000 34.888
T90 29.504 -0.312 29.192
T50 10.880 2.424 13.304
Peak 1.000 -0.420 0.580
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
198.2376 -56.0290 0.0100 27.3 -74.4 1.5194 19.4 TRIG_00702252
------------------------------------------
Foreground time interval of the image:
-1.000 15.869 (delta_t = 16.869 [sec])
Background time interval of the image:
-35.331 -1.000 (delta_t = 34.331 [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 -1.000 sec. to 34.888 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32082 ( -0.136725 0.135806 )
Norm@50keV : 3.50525E-03 ( -0.00026206 0.00026204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.56 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 57 degrees of freedom
# Null hypothesis probability = 1.598565e-01
Photon flux (15-150 keV) in 35.89 sec: 0.419832 ( -0.0329708 0.0331054 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23697e-06 ( -1.01174e-07 1.01709e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.000 sec. to 34.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17388 ( -0.564438 0.268003 )
Epeak [keV] : 304.184 ( -304.227 -304.227 )
Norm@50keV : 4.11089E-03 ( -0.000838664 0.00332753 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.32 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 56 degrees of freedom
# Null hypothesis probability = 1.429619e-01
Photon flux (15-150 keV) in 35.89 sec: 0.416515 ( -0.03489 0.034829 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22583e-06 ( -1.10362e-07 1.08901e-07 ) ergs/cm2
Band function
Time interval is from -1.000 sec. to 34.888 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.04667 ( 0.963321 0.963321 )
beta : -1.42610 ( 1.40667 0.215067 )
Epeak [keV] : 165.453 ( -132.359 -132.359 )
Norm@50keV : 4.83761E-03 ( -0.00152193 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.25 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 55 degrees of freedom
# Null hypothesis probability = 1.243429e-01
Photon flux (15-150 keV) in 35.89 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] : 17.7208 (-1.74158 2.00319)
R^2/D10^2 : 2.74751E-02 (-0.0083655 0.0116625)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.18 using 59 PHA bins.
# Reduced chi-squared = 1.8102 for 57 degrees of freedom
# Null hypothesis probability = 1.756870e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.231e-08 1.055e-08
25- 50 2.848e-07 3.081e-08
50-150 6.464e-07 9.421e-08
15-150 9.935e-07 9.224e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-22.9043 -200)
Norm : 1.75181 (-0.132138 0.132138)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.25 using 59 PHA bins.
# Reduced chi-squared = 1.338 for 57 degrees of freedom
# Null hypothesis probability = 4.522126e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.566e-07 1.416e-08
25- 50 3.012e-07 3.747e-08
50-150 6.607e-07 2.184e-07
15-150 1.119e-06 2.283e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.44953 (-2.77493 2.98829)
R1^2/D10^2 : 0.207633 (-0.119427 0.546461)
kT2 [keV] : 32.7054 (-9.17126 30.8998)
R2^2/D10^2 : 2.86054E-03 (-0.00240651 0.0062345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.02 using 59 PHA bins.
# Reduced chi-squared = 1.273 for 55 degrees of freedom
# Null hypothesis probability = 8.352280e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.162e-07 5.062e-08
25- 50 2.956e-07 9.150e-08
50-150 8.145e-07 3.821e-07
15-150 1.226e-06 4.694e-07
Peak spectrum fit
Power-law model
Time interval is from -0.420 sec. to 0.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.930781 ( -0.339823 0.315149 )
Norm@50keV : 1.07833E-02 ( -0.00184927 0.00178674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.99 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 57 degrees of freedom
# Null hypothesis probability = 3.026974e-01
Photon flux (15-150 keV) in 1 sec: 1.23821 ( -0.210207 0.212006 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.196e-07 ( -1.97816e-08 1.98545e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.420 sec. to 0.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01244 ( -1.43159 -2.01244 )
Epeak [keV] : 4.51362 ( )
Norm@50keV : 2.11333E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.67 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 56 degrees of freedom
# Null hypothesis probability = 2.805519e-01
Photon flux (15-150 keV) in 1 sec: 1.24503 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19551e-07 ( -1.9501e-08 1.9296e-08 ) ergs/cm2
Band function
Time interval is from -0.420 sec. to 0.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -0.930769 ( -0.314843 0.33981 )
Epeak [keV] : 13.7581 ( -13.7581 -13.7581 )
Norm@50keV : 1.46560 ( -0.251353 0.242846 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.99 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 55 degrees of freedom
# Null hypothesis probability = 2.409136e-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] : 29.1759 (-6.50686 10.3261)
R^2/D10^2 : 1.85734E-02 (-0.0105967 0.0211412)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.56 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 57 degrees of freedom
# Null hypothesis probability = 9.284406e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.516e-09 9.650e-10
25- 50 1.534e-08 5.212e-09
50-150 9.319e-08 3.047e-08
15-150 1.111e-07 3.765e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-40.7294 -200)
Norm : 5.23184 (-0.862989 0.862989)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.311 for 57 degrees of freedom
# Null hypothesis probability = 5.778536e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.303e-08 7.445e-09
25- 50 2.506e-08 1.419e-08
50-150 5.496e-08 3.135e-08
15-150 9.305e-08 5.260e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.71929 (-1.4211 2.33404)
R1^2/D10^2 : 17.3261 (-15.5852 143.321)
kT2 [keV] : 35.9994 (-9.07618 17.6156)
R2^2/D10^2 : 9.78398E-03 (-0.00621876 0.0127241)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.39 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 55 degrees of freedom
# Null hypothesis probability = 4.226878e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.271e-08 7.023e-09
25- 50 1.482e-08 6.078e-09
50-150 9.695e-08 4.630e-08
15-150 1.245e-07 5.155e-08
Plot creation:
Fri Jul 1 00:21:39 EDT 2016