batgrbproduct analysis for trigger=777215
batgrbproduct Analysis for Trigger=777215
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): Sun Oct 8 08:02:30 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger777215/GCN5_download_cron
======================================================================
Trigger: 00777215 Segment: 000
BAT Trigger Time: 529070278.08 [s; MET]
Trigger Stop: 529070280.128 [s; MET]
UTC: 2017-10-07T11:57:38.277120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.543621795884 Dec: 42.8493348720254 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.18
Image Trigger?: NO
Rate S/N Ratio: 13.6747943311773 [ if not an image trigger ]
Image S/N Ratio: 8.18
Flight Position: [ source = BAT ]
RA: 135.543621795884 Dec: 42.8493348720254 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.635464319463 Dec: 42.92982789542 [deg; J2000]
{ 09h 02m 32.5s , +42d 55' 47.4" }
+/- 3.61408498821488 [arcmin] (estimated 90% radius based on SNR)
+/- 2.30900923034273 [arcmin] (formal 1-sigma fit error)
SNR: 4.8526376570543
Angular difference between Flight and Ground position is 6.294873 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 105 +/- 45.0444225182208
Measured from: -0.0799998641014099
to: 104.920000135899 [s; relative to TRIGTIME]
T50: 55 +/- 54.3783044972901
Measured from: 2.92000013589859
to: 57.9200001358986 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.920000016689301
to: 1.9200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0799999833106995
to: 107.920000016689 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.109913 0.209890 0.125480 0.076476
0.052070 0.054308 0.048068 0.043425 [error]
Peak 0.006564 0.024361 0.016302 0.010262
0.005091 0.005499 0.005163 0.004506 [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 3.42e-08 6.76e-08 1.04e-07 3.49e-07 2.91e-07 5.56e-07 erg/cm2
Error 1.73e-08 2.31e-08 4.30e-08 3.04e-07 1.08e-07 3.41e-07 erg/cm2
Peak flux Power-law 8.19e-02 1.19e-01 1.30e-01 2.63e-01 4.12e-01 5.94e-01 ph/cm2/s
Error 5.11e-02 4.53e-02 3.95e-02 1.90e-01 1.20e-01 2.02e-01 ph/cm2/s
Fluence Cutoff-PL 2.14e-08 9.06e-08 1.05e-07 1.75e-08 2.33e-07 2.34e-07 erg/cm2
Error 2.19e-08 3.33e-08 5.66e-08 1.12e-07 9.91e-08 1.51e-07 erg/cm2
Peak flux Cutoff-PL 8.24e-02 1.20e-01 1.29e-01 2.59e-01 4.12e-01 5.90e-01 ph/cm2/s
Error 5.51e-02 3.60e-02 4.20e-02 2.65e-01 1.21e-01 2.36e-01 ph/cm2/s
Fluence Band 2.02e-08 1.16e-07 1.17e-07 9.21e-09 2.62e-07 2.63e-07 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 1.379 0.519 - - 2.78e-04 9.35e-05 70.030 57
CPL -1.620 5.222 55.9 48.9 1.05e-02 1.52e+01 66.340 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.882 0.547 - - 3.59e-03 1.06e-03 59.100 57
CPL 0.880 0.551 9999.4 0.0 3.61e-03 1.44e-02 59.100 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: 2.560000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 108.000 -0.080 107.920
T90 105.000 -0.080 104.920
T50 55.000 2.920 57.920
Peak 1.000 0.920 1.920
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.544 42.849 0.000 10.186 -8.974 0.155 9.106 TRIG_00777215
Image time interval: -0.080 to 2.920 [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 -0.080 sec. to 107.920 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37912 ( -0.518193 0.520416 )
Norm@50keV : 2.77526E-04 ( -9.38929e-05 9.30692e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.03 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.151847e-01
Photon flux (15-150 keV) in 108 sec: 3.36447E-02 ( -0.0111073 0.0111456 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.90722e-07 ( -1.05648e-07 1.10557e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.080 sec. to 107.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.61963 ( -7.68733 2.7564 )
Epeak [keV] : 55.8878 ( -13.8691 83.9507 )
Norm@50keV : 1.04582E-02 ( -0.0134906 30.3693 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 56 degrees of freedom
# Null hypothesis probability = 1.623255e-01
Photon flux (15-150 keV) in 108 sec: 3.03262E-02 ( -0.0112421 0.0114109 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32658e-07 ( -8.53783e-08 1.12903e-07 ) ergs/cm2
Band function
Time interval is from -0.080 sec. to 107.920 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.63630 ( -1.77348 -0.819336 )
beta : -9.99999 ( 9.99999 0.000152346 )
Epeak [keV] : 55.8237 ( -14.3573 83.2949 )
Norm@50keV : 1.07097E-02 ( -0.00328812 0.443895 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.406598e-01
Photon flux (15-150 keV) in 108 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62247e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.4049 (-3.70632 5.48975)
R^2/D10^2 : 4.94028E-03 (-0.00494028 0.00900437)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.33 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.861656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.331e-08 1.482e-08
25- 50 8.917e-08 5.301e-08
50-150 1.236e-07 8.548e-08
15-150 2.361e-07 1.450e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.363 -199.363)
Norm : 0.139802 (-0.0454944 0.0454994)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.49 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 57 degrees of freedom
# Null hypothesis probability = 1.239980e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.760e-08 2.375e-08
25- 50 7.232e-08 4.290e-08
50-150 1.586e-07 9.877e-08
15-150 2.685e-07 1.691e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.27427E-02 (-0.0127427 -0.0127427)
R1^2/D10^2 : 2.45202E-03 (-0.00245202 -0.00245202)
kT2 [keV] : 14.4048 (-3.70627 5.4898)
R2^2/D10^2 : 4.94034E-03 (-0.00494033 0.00900434)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.33 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.408112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.920 sec. to 1.920 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882064 ( -0.584609 0.51026 )
Norm@50keV : 3.58731E-03 ( -0.00107329 0.00104255 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.10 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.987915e-01
Photon flux (15-150 keV) in 1 sec: 0.411715 ( -0.12006 0.120903 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.05431e-08 ( -1.25309e-08 1.2781e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.920 sec. to 1.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.879882 ( -0.592065 0.51082 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.61169E-03 ( -0.00105131 0.02778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.10 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 56 degrees of freedom
# Null hypothesis probability = 3.630216e-01
Photon flux (15-150 keV) in 1 sec: 0.411825 ( -0.122224 0.120455 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.05184e-08 ( -1.32791e-08 1.2772e-08 ) ergs/cm2
Band function
Time interval is from 0.920 sec. to 1.920 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.05498 ( -0.921254 0.68786 )
Epeak [keV] : 35.3679 ( -35.3679 23.0088 )
Norm@50keV : 32.1069 ( -9.05524 1.02879e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380783e-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] : 23.1275 (-8.31803 18.9696)
R^2/D10^2 : 1.26403E-02 (-0.0125813 0.0386074)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.64 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 57 degrees of freedom
# Null hypothesis probability = 3.137040e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.222e-09 7.840e-10
25- 50 6.650e-09 4.018e-09
50-150 2.656e-08 1.712e-08
15-150 3.444e-08 2.118e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-90.2364 -200)
Norm : 1.63356 (-0.49708 0.49708)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.57 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 57 degrees of freedom
# Null hypothesis probability = 2.562456e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.067e-09 2.554e-09
25- 50 7.824e-09 4.774e-09
50-150 1.716e-08 1.066e-08
15-150 2.905e-08 1.758e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.5940 (-9.68619 14.7011)
R1^2/D10^2 : 9.51859E-02 (-0.0461725 8.96651)
kT2 [keV] : 65.9880 (-67.1415 -69.8165)
R2^2/D10^2 : 6.13922E-04 (-0.000252506 0.0160195)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.56 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.429740e-01
# Null hypothesis probability = 3.462567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.519e-09 1.672e-09
25- 50 7.598e-09 5.155e-09
50-150 3.115e-08 1.670e-08
15-150 4.126e-08 2.117e-08
Plot creation:
Sun Oct 8 08:08:28 EDT 2017