batgrbproduct analysis for trigger=772006
batgrbproduct Analysis for Trigger=772006
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): Wed Sep 13 03:45:19 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger772006/GCN5_download_cron
======================================================================
Trigger: 00772006 Segment: 000
BAT Trigger Time: 526872876.608 [s; MET]
Trigger Stop: 526872880.704 [s; MET]
UTC: 2017-09-12T01:34:16.935740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 167.372184088217 Dec: -54.3596433863869 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.13
Image Trigger?: NO
Rate S/N Ratio: 13.7477270848675 [ if not an image trigger ]
Image S/N Ratio: 10.13
Flight Position: [ source = BAT ]
RA: 167.372184088217 Dec: -54.3596433863869 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 167.385978980518 Dec: -54.3431649018479 [deg; J2000]
{ 11h 09m 32.6s , -54d 20' 35.4" }
+/- 2.07970430608621 [arcmin] (estimated 90% radius based on SNR)
+/- 1.07528696698536 [arcmin] (formal 1-sigma fit error)
SNR: 10.686374573535
Angular difference between Flight and Ground position is 1.100112 arcmin
Partial Coding Fraction: 0.3476562 [ including projection effects ]
Duration
T90: 21.8880000114441 +/- 5.58652667387697
Measured from: 0.248000144958496
to: 22.1360001564026 [s; relative to TRIGTIME]
T50: 10.160000026226 +/- 3.79524753083644
Measured from: 2.42400014400482
to: 12.5840001702309 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.37999999523163
to: 3.37999999523163 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.423999965190887
to: 25.6400000452995 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.683943 0.711543 0.390982 0.063578
0.076422 0.070307 0.056304 0.049534 [error]
Peak 0.097805 0.080629 0.034204 0.010710
0.015854 0.014511 0.011814 0.010270 [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 2.50e-07 3.30e-07 3.21e-07 5.56e-07 1.08e-06 1.46e-06 erg/cm2
Error 4.16e-08 3.59e-08 5.70e-08 2.01e-07 1.32e-07 2.58e-07 erg/cm2
Peak flux Power-law 1.06e+00 6.58e-01 2.63e-01 1.41e-01 2.05e+00 2.12e+00 ph/cm2/s
Error 2.97e-01 1.32e-01 9.98e-02 1.03e-01 4.06e-01 4.16e-01 ph/cm2/s
Fluence Cutoff-PL 2.44e-07 3.38e-07 3.21e-07 3.92e-07 1.07e-06 1.30e-06 erg/cm2
Error 4.66e-08 4.48e-08 5.93e-08 4.07e-07 1.47e-07 3.71e-07 erg/cm2
Peak flux Cutoff-PL 1.07e+00 6.56e-01 2.58e-01 1.33e-01 2.05e+00 2.12e+00 ph/cm2/s
Error 2.99e-01 1.41e-01 -------- -------- 4.07e-01 4.27e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- 1.55e-06 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 2.042 0.208 - - 4.50e-03 5.82e-04 40.210 57
CPL 1.839 0.703 35.3 0.0 5.82e-03 0.00e+00 40.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.325 0.429 - - 1.16e-02 3.30e-03 53.190 57
CPL 2.494 0.000 195.1 0.0 9.22e-03 0.00e+00 52.980 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: 5.248000 sec.
T50 in the 50-300 keV band: 2.496000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.064 -0.424 25.640
T90 21.888 0.248 22.136
T50 10.160 2.424 12.584
Peak 1.000 2.380 3.380
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
167.3860 -54.3432 0.0179 40.6 -139.7 1.6817 10.7 TRIG_00772006
------------------------------------------
Foreground time interval of the image:
-0.424 25.640 (delta_t = 26.064 [sec])
Background time interval of the image:
-78.207 -0.424 (delta_t = 77.783 [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 -0.424 sec. to 25.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04244 ( -0.203086 0.21272 )
Norm@50keV : 4.49877E-03 ( -0.00058872 0.000574617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.21 using 59 PHA bins.
# Reduced chi-squared = 0.7054 for 57 degrees of freedom
# Null hypothesis probability = 9.551144e-01
Photon flux (15-150 keV) in 26.06 sec: 0.688328 ( -0.0772262 0.0774923 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.084e-06 ( -1.31188e-07 1.32732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.424 sec. to 25.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83943 ( -0.90022 0.505852 )
Epeak [keV] : 35.2567 ( )
Norm@50keV : 5.82419E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.01 using 59 PHA bins.
# Reduced chi-squared = 0.7145 for 56 degrees of freedom
# Null hypothesis probability = 9.473738e-01
Photon flux (15-150 keV) in 26.06 sec: 0.681841 ( -0.080905 0.08068 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0658e-06 ( -1.4849e-07 1.46173e-07 ) ergs/cm2
Band function
Time interval is from -0.424 sec. to 25.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.98485 ( 1.98479 1.98479 )
beta : -9.26012 ( 9.36359 19.3636 )
Epeak [keV] : 13.3440 ( -9.52806 -11.8629 )
Norm@50keV : 4.80189E-03 ( -0.000528923 0.114222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7295 for 55 degrees of freedom
# Null hypothesis probability = 9.339866e-01
Photon flux (15-150 keV) in 26.06 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] : 10.3890 (-1.35388 1.57198)
R^2/D10^2 : 0.266551 (-0.112855 0.194843)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.78 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 57 degrees of freedom
# Null hypothesis probability = 3.094616e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.545e-07 3.161e-08
25- 50 4.051e-07 6.320e-08
50-150 2.359e-07 6.635e-08
15-150 7.955e-07 1.140e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.3689 (-19.0016 31.9495)
Norm : 3.38593 (-0.59871 0.719412)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.02 using 59 PHA bins.
# Reduced chi-squared = 0.7197 for 57 degrees of freedom
# Null hypothesis probability = 9.452638e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.254e-07 3.504e-08
25- 50 3.549e-07 4.144e-08
50-150 4.428e-07 1.247e-07
15-150 1.023e-06 1.462e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.93042 (-2.13337 2.13242)
R1^2/D10^2 : 1.70730 (-1.11362 3.36725)
kT2 [keV] : 20.6409 (-6.66727 18.5899)
R2^2/D10^2 : 1.32321E-02 (-0.0116709 0.0415975)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.70 using 59 PHA bins.
# Reduced chi-squared = 0.7582 for 55 degrees of freedom
# Null hypothesis probability = 9.070300e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.324e-07 1.221e-07
25- 50 3.409e-07 1.518e-07
50-150 4.680e-07 2.560e-07
15-150 1.041e-06 4.166e-07
Peak spectrum fit
Power-law model
Time interval is from 2.380 sec. to 3.380 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.32481 ( -0.400308 0.457278 )
Norm@50keV : 1.15798E-02 ( -0.00339549 0.00321241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.19 using 59 PHA bins.
# Reduced chi-squared = 0.9331 for 57 degrees of freedom
# Null hypothesis probability = 6.189021e-01
Photon flux (15-150 keV) in 1 sec: 2.05198 ( -0.405875 0.406659 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1118e-07 ( -2.5391e-08 2.62728e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.380 sec. to 3.380 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49364 ( -1.98996 -1.98996 )
Epeak [keV] : 195.052 ( )
Norm@50keV : 9.22315E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.98 using 59 PHA bins.
# Reduced chi-squared = 0.9461 for 56 degrees of freedom
# Null hypothesis probability = 5.898342e-01
Photon flux (15-150 keV) in 1 sec: 2.05424 ( -0.40966 0.40444 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11151e-07 ( -2.64546e-08 2.5856e-08 ) ergs/cm2
Band function
Time interval is from 2.380 sec. to 3.380 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.28377 ( 5.28377 5.28377 )
beta : -2.32481 ( -0.457279 0.400451 )
Epeak [keV] : 9.34901 ( -9.34901 -9.34901 )
Norm@50keV : 1.57386 ( -0.461495 0.436611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.19 using 59 PHA bins.
# Reduced chi-squared = 0.9670 for 55 degrees of freedom
# Null hypothesis probability = 5.442073e-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] : 7.95599 (-1.91668 2.42539)
R^2/D10^2 : 2.18118 (-1.44063 4.72297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.850394e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.486e-08 1.029e-08
25- 50 4.310e-08 1.575e-08
50-150 1.111e-08 6.543e-09
15-150 7.908e-08 3.086e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.5222 (-18.1454 43.0271)
Norm : 12.4853 (-4.37109 7.78473)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.08 using 59 PHA bins.
# Reduced chi-squared = 0.9664 for 57 degrees of freedom
# Null hypothesis probability = 5.472670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.924e-08 7.800e-09
25- 50 3.947e-08 1.338e-08
50-150 3.260e-08 1.855e-08
15-150 1.013e-07 3.473e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.54049 (-2.16005 2.79456)
R1^2/D10^2 : 18.8455 (-15.9231 437.195)
kT2 [keV] : 19.3288 (-9.8474 47.6814)
R2^2/D10^2 : 4.59095E-02 (-0.0428332 0.763249)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.86 using 59 PHA bins.
# Reduced chi-squared = 0.9793 for 55 degrees of freedom
# Null hypothesis probability = 5.182670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.401e-08 1.859e-08
25- 50 3.197e-08 1.724e-08
50-150 4.531e-08 2.964e-08
15-150 1.113e-07 6.095e-08
Plot creation:
Wed Sep 13 04:14:22 EDT 2017