batgrbproduct Analysis for Trigger=708598
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): Tue Aug 16 18:29:37 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger708598/GCN5_download_cron
======================================================================
Trigger: 00708598 Segment: 000
BAT Trigger Time: 492954328.448 [s; MET]
Trigger Stop: 492954329.472 [s; MET]
UTC: 2016-08-15T11:45:11.734520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.686231783051 Dec: 84.2999980928292 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.55
Image Trigger?: NO
Rate S/N Ratio: 29.3938769133981 [ if not an image trigger ]
Image S/N Ratio: 12.55
Flight Position: [ source = BAT ]
RA: 288.686231783051 Dec: 84.2999980928292 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 288.615876946123 Dec: 84.2983117521784 [deg; J2000]
{ 19h 14m 27.8s , +84d 17' 53.9" }
+/- 0.969587036007044 [arcmin] (estimated 90% radius based on SNR)
+/- 0.337030019489018 [arcmin] (formal 1-sigma fit error)
SNR: 31.7892362679252
Angular difference between Flight and Ground position is 0.431354 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 8.56799989938736 +/- 1.8342955655889
Measured from: -4.25999987125397
to: 4.30800002813339 [s; relative to TRIGTIME]
T50: 2.8759999871254 +/- 0.288804421340564
Measured from: -0.159999907016754
to: 2.71600008010864 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.14399999380112
to: 3.14399999380112 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.40799999237061
to: 5.19599997997284 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.655606 0.914607 0.630638 0.122512
0.038448 0.041560 0.036154 0.028534 [error]
Peak 0.145190 0.191980 0.160017 0.030176
0.013073 0.014506 0.012830 0.009220 [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 2.49e-07 4.00e-07 4.84e-07 1.15e-06 1.46e-06 2.28e-06 erg/cm2
Error 2.18e-08 2.18e-08 3.49e-08 1.72e-07 8.40e-08 2.02e-07 erg/cm2
Peak flux Power-law 1.62e+00 1.56e+00 1.05e+00 1.11e+00 4.69e+00 5.35e+00 ph/cm2/s
Error 2.19e-01 1.32e-01 1.02e-01 2.16e-01 3.80e-01 4.14e-01 ph/cm2/s
Fluence Cutoff-PL 2.19e-07 4.30e-07 5.06e-07 4.43e-07 1.39e-06 1.60e-06 erg/cm2
Error 2.64e-08 2.72e-08 3.95e-08 2.07e-07 9.10e-08 2.22e-07 erg/cm2
Peak flux Cutoff-PL 1.48e+00 1.62e+00 1.11e+00 7.37e-01 4.60e+00 4.94e+00 ph/cm2/s
Error 2.74e-01 1.51e-01 1.23e-01 4.31e-01 3.93e-01 5.62e-01 ph/cm2/s
Fluence Band 2.17e-07 4.28e-07 5.05e-07 4.46e-07 1.39e-06 1.60e-06 erg/cm2
Error 2.49e-08 2.63e-08 3.72e-08 -------- -------- -------- erg/cm2
Peak flux Band 1.50e+00 1.61e+00 1.10e+00 7.78e-01 4.62e+00 5.00e+00 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 1.724 0.092 - - 1.36e-02 7.54e-04 59.910 57
CPL 0.961 0.414 67.8 15.7 3.31e-02 1.65e-02 48.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.570 0.132 - - 3.68e-02 2.90e-03 33.760 57
CPL 1.134 0.538 106.5 -35.7 5.96e-02 3.83e-02 31.780 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: 3.968000 sec.
T50 in the 50-300 keV band: 2.176000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 11.604 -6.408 5.196
T90 8.568 -4.260 4.308
T50 2.876 -0.160 2.716
Peak 1.000 2.144 3.144
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
288.6159 +84.2983 0.0061 41.9 13.6 2.4709 31.8 TRIG_00708598
------------------------------------------
Foreground time interval of the image:
-6.408 5.196 (delta_t = 11.604 [sec])
Background time interval of the image:
-239.448 -6.408 (delta_t = 233.040 [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 -6.408 sec. to 5.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72439 ( -0.0910604 0.0922754 )
Norm@50keV : 1.36328E-02 ( -0.000755555 0.000752509 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.91 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.704545e-01
Photon flux (15-150 keV) in 11.6 sec: 1.82628 ( -0.10074 0.10093 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46157e-06 ( -8.38518e-08 8.41658e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.408 sec. to 5.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.961479 ( -0.434085 0.394837 )
Epeak [keV] : 67.7808 ( -9.69587 21.7575 )
Norm@50keV : 3.30875E-02 ( -0.0119543 0.0211321 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.14 using 59 PHA bins.
# Reduced chi-squared = 0.8596 for 56 degrees of freedom
# Null hypothesis probability = 7.632595e-01
Photon flux (15-150 keV) in 11.6 sec: 1.75912 ( -0.1059 0.10618 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39478e-06 ( -9.09208e-08 9.11644e-08 ) ergs/cm2
Band function
Time interval is from -6.408 sec. to 5.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.961404 ( -0.290771 0.553532 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 67.7665 ( -8.78164 21.7556 )
Norm@50keV : 3.30884E-02 ( -0.0119493 0.0211557 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.14 using 59 PHA bins.
# Reduced chi-squared = 0.8753 for 55 degrees of freedom
# Null hypothesis probability = 7.320943e-01
Photon flux (15-150 keV) in 11.6 sec: 1.76726 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39437e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.7242 (-0.830142 0.884979)
R^2/D10^2 : 0.274014 (-0.0565072 0.0708234)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.51 using 59 PHA bins.
# Reduced chi-squared = 1.8335 for 57 degrees of freedom
# Null hypothesis probability = 1.268913e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.267e-07 1.165e-08
25- 50 4.618e-07 3.010e-08
50-150 5.668e-07 6.177e-08
15-150 1.155e-06 6.902e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 128.537 (-25.8869 32.2385)
Norm : 7.64855 (-0.503129 0.611427)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.05 using 59 PHA bins.
# Reduced chi-squared = 0.8780 for 57 degrees of freedom
# Null hypothesis probability = 7.312649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.303e-07 1.966e-08
25- 50 4.169e-07 3.149e-08
50-150 7.689e-07 2.229e-07
15-150 1.416e-06 2.609e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85232 (-1.30441 1.66093)
R1^2/D10^2 : 3.28885 (-1.86085 5.44919)
kT2 [keV] : 19.3277 (-2.39473 3.84595)
R2^2/D10^2 : 6.30459E-02 (-0.0340054 0.0465708)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.40 using 59 PHA bins.
# Reduced chi-squared = 0.8983 for 55 degrees of freedom
# Null hypothesis probability = 6.874556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.207e-07 6.884e-08
25- 50 4.178e-07 7.076e-08
50-150 7.284e-07 1.391e-07
15-150 1.367e-06 2.183e-07
Peak spectrum fit
Power-law model
Time interval is from 2.144 sec. to 3.144 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56995 ( -0.13065 0.132586 )
Norm@50keV : 3.68166E-02 ( -0.0029044 0.00289627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.76 using 59 PHA bins.
# Reduced chi-squared = 0.5924 for 57 degrees of freedom
# Null hypothesis probability = 9.939016e-01
Photon flux (15-150 keV) in 1 sec: 4.68812 ( -0.37916 0.379941 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4564e-07 ( -2.89547e-08 2.90506e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.144 sec. to 3.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13409 ( -0.587246 0.488931 )
Epeak [keV] : 106.550 ( -35.1995 -106.55 )
Norm@50keV : 5.96401E-02 ( -0.0242412 0.0522945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.78 using 59 PHA bins.
# Reduced chi-squared = 0.5675 for 56 degrees of freedom
# Null hypothesis probability = 9.962478e-01
Photon flux (15-150 keV) in 1 sec: 4.60330 ( -0.39248 0.39304 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40068e-07 ( -3.0137e-08 3.006e-08 ) ergs/cm2
Band function
Time interval is from 2.144 sec. to 3.144 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13412 ( -0.338045 0.613771 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 106.527 ( -27.3209 -106.527 )
Norm@50keV : 5.96345E-02 ( -0.024235 0.0523118 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.78 using 59 PHA bins.
# Reduced chi-squared = 0.5778 for 55 degrees of freedom
# Null hypothesis probability = 9.949053e-01
Photon flux (15-150 keV) in 1 sec: 4.62204 ( ) 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] : 15.9155 (-1.44353 1.59042)
R^2/D10^2 : 0.435014 (-0.125588 0.174746)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.15 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 57 degrees of freedom
# Null hypothesis probability = 1.903929e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.281e-08 3.530e-09
25- 50 9.555e-08 1.094e-08
50-150 1.688e-07 2.485e-08
15-150 2.872e-07 2.695e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.169 (-60.0058 -199.21)
Norm : 19.1260 (-1.46826 1.63141)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.03 using 59 PHA bins.
# Reduced chi-squared = 0.5620 for 57 degrees of freedom
# Null hypothesis probability = 9.969504e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.763e-08 4.475e-09
25- 50 9.162e-08 1.142e-08
50-150 2.009e-07 5.685e-08
15-150 3.401e-07 7.310e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.47888 (-1.53926 2.66733)
R1^2/D10^2 : 24.0697 (-20.2255 125.83)
kT2 [keV] : 20.3077 (-2.71888 4.86487)
R2^2/D10^2 : 0.162700 (-0.094593 0.119729)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.69 using 59 PHA bins.
# Reduced chi-squared = 0.5943 for 55 degrees of freedom
# Null hypothesis probability = 9.927597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.975e-08 2.205e-08
25- 50 8.286e-08 1.714e-08
50-150 1.986e-07 3.770e-08
15-150 3.312e-07 5.870e-08
Plot creation:
Tue Aug 16 18:34:41 EDT 2016