batgrbproduct Analysis for Trigger=706871
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 2 03:11:25 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger706871/GCN5_download_cron
======================================================================
Trigger: 00706871 Segment: 000
BAT Trigger Time: 491736527.168 [s; MET]
Trigger Stop: 491736528.192 [s; MET]
UTC: 2016-08-01T09:28:30.522860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.762767149869 Dec: 13.4995972351227 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.93
Image Trigger?: NO
Rate S/N Ratio: 14.9666295470958 [ if not an image trigger ]
Image S/N Ratio: 9.93
Flight Position: [ source = BAT ]
RA: 212.762767149869 Dec: 13.4995972351227 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 212.766150984434 Dec: 13.4826207849321 [deg; J2000]
{ 14h 11m 03.9s , +13d 28' 57.4" }
+/- 1.76428485792215 [arcmin] (estimated 90% radius based on SNR)
+/- 0.843789624472428 [arcmin] (formal 1-sigma fit error)
SNR: 13.5169083869206
Angular difference between Flight and Ground position is 1.037544 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 2.85199993848801 +/- 0.415427463220295
Measured from: -1.16799986362457
to: 1.68400007486343 [s; relative to TRIGTIME]
T50: 1.32399994134903 +/- 0.397959781634642
Measured from: -0.379999876022339
to: 0.944000065326691 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0239999890327454
to: 0.976000010967255 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.34399998188019
to: 1.82800000905991 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.105827 0.130345 0.072595 0.015799
0.012955 0.013796 0.011681 0.009279 [error]
Peak 0.046599 0.069342 0.022024 0.001185
0.007377 0.007981 0.006467 0.004886 [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 3.36e-08 5.00e-08 5.55e-08 1.17e-07 1.74e-07 2.56e-07 erg/cm2
Error 5.96e-09 6.22e-09 1.10e-08 4.57e-08 2.59e-08 5.74e-08 erg/cm2
Peak flux Power-law 5.15e-01 3.92e-01 1.99e-01 1.45e-01 1.17e+00 1.25e+00 ph/cm2/s
Error 1.07e-01 6.23e-02 4.92e-02 6.51e-02 1.86e-01 2.01e-01 ph/cm2/s
Fluence Cutoff-PL 3.10e-08 5.56e-08 5.51e-08 3.31e-08 1.63e-07 1.75e-07 erg/cm2
Error 6.75e-09 8.81e-09 1.28e-08 3.95e-08 2.81e-08 6.74e-08 erg/cm2
Peak flux Cutoff-PL 4.20e-01 5.34e-01 1.73e-01 8.08e-03 1.14e+00 1.14e+00 ph/cm2/s
Error 1.24e-01 1.00e-01 7.11e-02 1.99e-02 1.83e-01 1.84e-01 ph/cm2/s
Fluence Band 3.08e-08 5.54e-08 5.48e-08 4.60e-08 1.63e-07 1.88e-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 1.848 0.219 - - 5.98e-03 8.80e-04 56.700 57
CPL 0.996 1.026 51.3 -18.7 1.81e-02 3.97e-02 54.220 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.975 0.258 - - 7.91e-03 1.54e-03 68.910 57
CPL -0.825 1.962 39.6 7.0 3.75e-01 5.31e+00 57.860 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: 2.176000 sec.
T50 in the 50-300 keV band: 1.344000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 3.172 -1.344 1.828
T90 2.852 -1.168 1.684
T50 1.324 -0.380 0.944
Peak 1.000 -0.024 0.976
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
212.7662 +13.4826 0.0143 29.5 20.4 0.3243 13.5 TRIG_00706871
------------------------------------------
Foreground time interval of the image:
-1.344 1.828 (delta_t = 3.172 [sec])
Background time interval of the image:
-239.168 -135.798 (delta_t = 103.370 [sec])
-135.168 -1.344 (delta_t = 133.824 [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 -1.344 sec. to 1.828 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84783 ( -0.212881 0.225192 )
Norm@50keV : 5.98095E-03 ( -0.000889769 0.000869245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.70 using 59 PHA bins.
# Reduced chi-squared = 0.9947 for 57 degrees of freedom
# Null hypothesis probability = 4.863435e-01
Photon flux (15-150 keV) in 3.172 sec: 0.839944 ( -0.104709 0.104733 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74446e-07 ( -2.56425e-08 2.61369e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.344 sec. to 1.828 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.996493 ( -1.13761 0.914306 )
Epeak [keV] : 51.3023 ( -13.9599 -51.3023 )
Norm@50keV : 1.80663E-02 ( -0.0180664 0.0614118 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.22 using 59 PHA bins.
# Reduced chi-squared = 0.9682 for 56 degrees of freedom
# Null hypothesis probability = 5.424488e-01
Photon flux (15-150 keV) in 3.172 sec: 0.818844 ( -0.107071 0.107124 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62533e-07 ( -2.72405e-08 2.8888e-08 ) ergs/cm2
Band function
Time interval is from -1.344 sec. to 1.828 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.996393 ( 1.14308 4.82805 )
beta : -4.54182 ( 4.15895 14.1589 )
Epeak [keV] : 51.2870 ( -20.3607 -51.2791 )
Norm@50keV : 1.80666E-02 ( -0.0182675 365.803 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.22 using 59 PHA bins.
# Reduced chi-squared = 0.9858 for 55 degrees of freedom
# Null hypothesis probability = 5.043541e-01
Photon flux (15-150 keV) in 3.172 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62673e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.1035 (-1.54798 1.8017)
R^2/D10^2 : 0.275196 (-0.118422 0.205896)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.51 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.308171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-08 5.259e-09
25- 50 6.447e-08 1.104e-08
50-150 4.522e-08 1.441e-08
15-150 1.322e-07 2.216e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.2771 (-28.5616 57.5104)
Norm : 3.89426 (-0.647789 0.803194)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9558 for 57 degrees of freedom
# Null hypothesis probability = 5.701227e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.218e-08 5.419e-09
25- 50 5.392e-08 8.358e-09
50-150 7.997e-08 4.135e-08
15-150 1.661e-07 4.314e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.04666 (-2.76394 2.82584)
R1^2/D10^2 : 1.56680 (-1.08575 15.0155)
kT2 [keV] : 18.1060 (-5.2408 15.5615)
R2^2/D10^2 : 3.14332E-02 (-0.0288628 0.0624271)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.14 using 59 PHA bins.
# Reduced chi-squared = 0.9844 for 55 degrees of freedom
# Null hypothesis probability = 5.074309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.094e-08 1.714e-08
25- 50 5.510e-08 2.837e-08
50-150 7.465e-08 4.285e-08
15-150 1.607e-07 8.300e-08
Peak spectrum fit
Power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97548 ( -0.247947 0.2678 )
Norm@50keV : 7.91437E-03 ( -0.00155095 0.0015199 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.91 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 57 degrees of freedom
# Null hypothesis probability = 1.339423e-01
Photon flux (15-150 keV) in 1 sec: 1.17397 ( -0.185836 0.18584 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.28894e-08 ( -1.34944e-08 1.3857e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.825291 ( -2.32814 1.59641 )
Epeak [keV] : 39.6167 ( -5.87847 8.09836 )
Norm@50keV : 0.374649 ( -0.388281 10.2262 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 56 degrees of freedom
# Null hypothesis probability = 4.063249e-01
Photon flux (15-150 keV) in 1 sec: 1.13549 ( -0.182901 0.18394 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.25262e-08 ( -1.16206e-08 1.29485e-08 ) ergs/cm2
Band function
Time interval is from -0.024 sec. to 0.976 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.68240 ( -1.63563 -0.774122 )
beta : -3.29312 ( 9.99716 19.9966 )
Epeak [keV] : 36.5363 ( -5.86491 7.86443 )
Norm@50keV : 1.47866 ( -1.70206 131.246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.76 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.735903e-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] : 10.0280 (-1.3615 1.56209)
R^2/D10^2 : 0.610201 (-0.262559 0.450454)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.33 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.263506e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.251e-08 3.453e-09
25- 50 3.122e-08 7.115e-09
50-150 1.643e-08 6.322e-09
15-150 6.016e-08 1.248e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.0098 (-20.1454 36.9262)
Norm : 6.28649 (-1.34667 1.63061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.31 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 57 degrees of freedom
# Null hypothesis probability = 2.636500e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.588e-08 3.160e-09
25- 50 2.441e-08 4.575e-09
50-150 2.854e-08 1.183e-08
15-150 6.883e-08 1.712e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.02729 (-7.5603 -7.5603)
R1^2/D10^2 : 0.877011 (-0.885403 -0.885403)
kT2 [keV] : 14.0855 (-13.1636 -13.1636)
R2^2/D10^2 : 7.55182E-02 (-0.0752375 0.915758)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.70 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Reduced chi-squared = 1.049 for 55 degrees of freedom
# Null hypothesis probability = 3.748163e-01
# Null hypothesis probability = 3.756588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.341e-08 2.627e-08
25- 50 2.984e-08 8.955e-08
50-150 1.975e-08 1.746e-07
15-150 6.301e-08 2.344e-07
Plot creation:
Tue Aug 2 03:16:20 EDT 2016