batgrbproduct analysis for trigger=776347
batgrbproduct Analysis for Trigger=776347
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu Oct 5 16:04:44 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger776347/GCN5_download_cron
======================================================================
Trigger: 00776347 Segment: 000
BAT Trigger Time: 528796552 [s; MET]
Trigger Stop: 528796640 [s; MET]
UTC: 2017-10-04T07:55:32.213440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 139.161615042698 Dec: 52.6799760162536 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.15
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.15
Flight Position: [ source = BAT ]
RA: 139.161615042698 Dec: 52.6799760162536 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.151525786027 Dec: 52.6817498943591 [deg; J2000]
{ 09h 16m 36.4s , +52d 40' 54.3" }
+/- 1.31915569973388 [arcmin] (estimated 90% radius based on SNR)
+/- 0.382269414853367 [arcmin] (formal 1-sigma fit error)
SNR: 20.4770253606611
Angular difference between Flight and Ground position is 0.382121 arcmin
Partial Coding Fraction: 0.421875 [ including projection effects ]
Duration
T90: 128 +/- 16
Measured from: 1.00000011920929
to: 129.000000119209 [s; relative to TRIGTIME]
T50: 64 +/- 16
Measured from: 17.0000001192093
to: 81.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 56.5
to: 57.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1
to: 161 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.460667 1.760271 1.335098 0.358862
0.107532 0.112577 0.098868 0.086877 [error]
Peak 0.035080 0.018779 0.024739 0.010240
0.009906 0.009897 0.008500 0.007692 [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 5.00e-07 8.33e-07 1.05e-06 2.66e-06 3.13e-06 5.05e-06 erg/cm2
Error 6.00e-08 5.96e-08 9.79e-08 5.36e-07 2.32e-07 6.08e-07 erg/cm2
Peak flux Power-law 3.65e-01 2.53e-01 1.15e-01 7.28e-02 7.69e-01 8.06e-01 ph/cm2/s
Error 1.79e-01 8.87e-02 9.52e-02 1.02e-01 2.62e-01 2.76e-01 ph/cm2/s
Fluence Cutoff-PL 5.01e-07 8.34e-07 1.05e-06 2.64e-06 3.13e-06 5.03e-06 erg/cm2
Error 6.26e-08 6.16e-08 9.90e-08 8.62e-07 1.75e-07 8.90e-07 erg/cm2
Peak flux Cutoff-PL 3.66e-01 2.53e-01 1.15e-01 7.17e-02 7.69e-01 8.05e-01 ph/cm2/s
Error 1.78e-01 9.22e-02 7.62e-02 1.01e-01 2.61e-01 2.74e-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 1.661 0.125 - - 2.11e-03 1.48e-04 48.980 57
CPL 1.665 0.126 9999.4 -0.0 2.10e-03 1.64e-03 48.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.137 0.800 - - 4.80e-03 2.35e-03 49.610 57
CPL 2.154 0.000 158.6 0.0 4.65e-03 0.00e+00 49.570 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: 96.704000 sec.
T50 in the 50-300 keV band: 40.320000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 160.000 1.000 161.000
T90 128.000 1.000 129.000
T50 64.000 17.000 81.000
Peak 1.000 56.500 57.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.1515 +52.6817 0.0094 44.6 -6.1 4.5259 20.5 TRIG_00776347
------------------------------------------
Foreground time interval of the image:
1.000 95.301 (delta_t = 94.301 [sec])
Background time interval of the image:
-239.000 1.000 (delta_t = 240.000 [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 161.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66116 ( -0.124677 0.126034 )
Norm@50keV : 2.10523E-03 ( -0.000148255 0.000147488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 57 degrees of freedom
# Null hypothesis probability = 7.661805e-01
Photon flux (15-150 keV) in 160 sec: 0.275911 ( -0.0197168 0.01979 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12928e-06 ( -2.31867e-07 2.32949e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 161.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66488 ( -0.128884 0.123507 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 2.10326E-03 ( -0.00210763 0.00116472 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8749 for 56 degrees of freedom
# Null hypothesis probability = 7.350986e-01
Photon flux (15-150 keV) in 160 sec: 0.275762 ( -0.019723 0.019562 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1287e-06 ( -1.17984e-07 2.31296e-07 ) ergs/cm2
Band function
Time interval is from 1.000 sec. to 161.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34112 ( 1.34136 1.34136 )
beta : -1.66076 ( -0.12611 0.124501 )
Epeak [keV] : 24.4349 ( -24.3681 -24.3681 )
Norm@50keV : 4.58675E-03 ( -0.00236472 0.301582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8906 for 55 degrees of freedom
# Null hypothesis probability = 7.026684e-01
Photon flux (15-150 keV) in 160 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] : 14.1277 ( )
R^2/D10^2 : 3.62372E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 116.40 using 59 PHA bins.
# Reduced chi-squared = 2.0422 for 57 degrees of freedom
# Null hypothesis probability = 5.847821e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.442e-07 3.272e-08
25- 50 9.165e-07 8.176e-08
50-150 1.210e-06 1.571e-07
15-150 2.371e-06 1.968e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 163.303 (-46.3631 -163.324)
Norm : 1.11979 (-0.0883145 0.101598)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.61 using 59 PHA bins.
# Reduced chi-squared = 0.9055 for 57 degrees of freedom
# Null hypothesis probability = 6.766412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.566e-07 4.912e-08
25- 50 8.565e-07 1.531e-07
50-150 1.749e-06 6.909e-07
15-150 3.062e-06 8.670e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.83774 (-1.46266 1.63051)
R1^2/D10^2 : 0.357942 (-0.185181 0.474543)
kT2 [keV] : 28.2538 (-6.22816 12.3769)
R2^2/D10^2 : 2.40976E-03 (-0.00167068 0.00358581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9588 for 55 degrees of freedom
# Null hypothesis probability = 5.616967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.695e-07 1.159e-07
25- 50 8.490e-07 1.786e-07
50-150 1.812e-06 6.627e-07
15-150 3.131e-06 9.154e-07
Peak spectrum fit
Power-law model
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13732 ( -0.68975 0.910261 )
Norm@50keV : 4.79636E-03 ( -0.0025121 0.00219598 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.61 using 59 PHA bins.
# Reduced chi-squared = 0.8703 for 57 degrees of freedom
# Null hypothesis probability = 7.458823e-01
Photon flux (15-150 keV) in 1 sec: 0.768794 ( -0.261726 0.261751 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.47365e-08 ( -1.85945e-08 1.96462e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15419 ( -1.99914 -1.99914 )
Epeak [keV] : 158.551 ( )
Norm@50keV : 4.65167E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.8852 for 56 degrees of freedom
# Null hypothesis probability = 7.151991e-01
Photon flux (15-150 keV) in 1 sec: 0.768588 ( -0.261239 0.261572 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.43574e-08 ( -1.82318e-08 2.97072e-08 ) ergs/cm2
Band function
Time interval is from 56.500 sec. to 57.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.95367 ( 9.95367 9.95367 )
beta : -2.13741 ( -0.910198 0.68996 )
Epeak [keV] : 15.4846 ( -15.4846 -15.4846 )
Norm@50keV : 0.651865 ( -0.341425 0.298472 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.61 using 59 PHA bins.
# Reduced chi-squared = 0.9020 for 55 degrees of freedom
# Null hypothesis probability = 6.800445e-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] : 5.52668 (-2.00435 12.9654)
R^2/D10^2 : 3.57444 (-3.54398 25.9091)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.81 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 57 degrees of freedom
# Null hypothesis probability = 5.575309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.277e-08 7.655e-09
25- 50 1.059e-08 7.120e-09
50-150 6.838e-10 6.875e-10
15-150 2.404e-08 1.571e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.5472 (-62.5895 -62.5895)
Norm : 3.86767 (-1.7871 5.56884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.57 using 59 PHA bins.
# Reduced chi-squared = 0.8872 for 57 degrees of freedom
# Null hypothesis probability = 7.133747e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.783e-09 6.345e-09
25- 50 1.508e-08 9.490e-09
50-150 1.775e-08 1.457e-08
15-150 4.261e-08 2.885e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.14391 (-1.90537 2.57328)
R1^2/D10^2 : 10.5998 (-6.7747 32.2044)
kT2 [keV] : 21.0759 (-16.3143 -20.9675)
R2^2/D10^2 : 1.56508E-02 (-0.015572 0.085916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.27 using 59 PHA bins.
# Reduced chi-squared = 0.8776 for 55 degrees of freedom
# Null hypothesis probability = 7.275951e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.272e-08 8.095e-09
25- 50 1.131e-08 5.705e-09
50-150 2.244e-08 1.524e-08
15-150 4.647e-08 2.487e-08
Plot creation:
Thu Oct 5 16:29:56 EDT 2017