batgrbproduct Analysis for Trigger=727167
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): Sat Dec 17 09:26:22 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger727167/GCN5_download_cron
======================================================================
Trigger: 00727167 Segment: 000
BAT Trigger Time: 503630872 [s; MET]
Trigger Stop: 503630976 [s; MET]
UTC: 2016-12-17T01:27:34.681680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 150.637595876745 Dec: 52.3891561258775 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.21
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.21
Flight Position: [ source = BAT ]
RA: 150.637595876745 Dec: 52.3891561258775 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 150.658401491507 Dec: 52.3441252896874 [deg; J2000]
{ 10h 02m 38.0s , +52d 20' 38.9" }
+/- 2.12701177148287 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05004198194492 [arcmin] (formal 1-sigma fit error)
SNR: 10.3484588033845
Angular difference between Flight and Ground position is 2.807313 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 18.1759999990463 +/- 5.81273637182669
Measured from: 34.7280001044273
to: 52.9040001034737 [s; relative to TRIGTIME]
T50: 7.2960000038147 +/- 2.49024979503804
Measured from: 37.8640001416206
to: 45.1600001454353 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 42.6439999938011
to: 43.6439999938011 [s; relative to TRIGTIME]
Total Fluence
Measured from: 33.7680000066757
to: 53.8640000224113 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.232206 0.173683 0.040447 0.008789
0.024490 0.025001 0.020813 0.017745 [error]
Peak 0.029111 0.018044 0.001595 0.002024
0.005480 0.005716 0.004691 0.003936 [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 6.97e-08 6.25e-08 3.86e-08 3.62e-08 1.86e-07 2.07e-07 erg/cm2
Error 1.14e-08 1.19e-08 1.50e-08 2.57e-08 3.65e-08 5.09e-08 erg/cm2
Peak flux Power-law 2.32e-01 1.21e-01 3.89e-02 1.61e-02 4.00e-01 4.07e-01 ph/cm2/s
Error 7.33e-02 4.63e-02 2.91e-02 2.40e-02 1.21e-01 1.27e-01 ph/cm2/s
Fluence Cutoff-PL 6.89e-08 7.01e-08 2.39e-08 2.00e-09 1.65e-07 1.65e-07 erg/cm2
Error 1.21e-08 1.52e-08 1.99e-08 2.03e-08 3.58e-08 4.38e-08 erg/cm2
Peak flux Cutoff-PL 2.36e-01 1.35e-01 2.26e-02 8.49e-04 3.94e-01 3.94e-01 ph/cm2/s
Error 7.96e-02 6.77e-02 -------- 1.15e-02 1.18e-01 1.19e-01 ph/cm2/s
Fluence Band 7.43e-08 7.33e-08 3.45e-08 2.26e-08 1.94e-07 2.05e-07 erg/cm2
Error 1.32e-08 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.35e-01 1.33e-01 2.57e-02 -------- 3.96e-01 3.96e-01 ph/cm2/s
Error 7.68e-02 -------- -------- -------- 8.85e-02 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.695 0.349 - - 8.71e-04 2.52e-04 51.640 57
CPL 1.000 0.000 50.0 0.0 3.88e-03 0.00e+00 73.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.632 0.706 - - 1.88e-03 1.09e-03 69.810 57
CPL 1.122 0.000 17.0 0.0 2.23e-02 0.00e+00 69.180 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.096 33.768 53.864
T90 18.176 34.728 52.904
T50 7.296 37.864 45.160
Peak 1.000 42.644 43.644
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
150.6584 +52.3441 0.0186 5.2 -58.4 0.4988 10.3 TRIG_00727167
------------------------------------------
Foreground time interval of the image:
33.768 53.864 (delta_t = 20.096 [sec])
Background time interval of the image:
-239.000 33.768 (delta_t = 272.768 [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 33.768 sec. to 53.864 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.69529 ( -0.323738 0.375041 )
Norm@50keV : 8.71248E-04 ( -0.000248442 0.000255648 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9059 for 57 degrees of freedom
# Null hypothesis probability = 6.757609e-01
Photon flux (15-150 keV) in 20.1 sec: 0.193844 ( -0.0283143 0.0283613 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8599e-07 ( -3.52608e-08 3.76547e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 33.768 sec. to 53.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.88246E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.17 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 56 degrees of freedom
# Null hypothesis probability = 6.143272e-02
Photon flux (15-150 keV) in 20.1 sec: 0.189061 ( -0.027792 0.028116 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64672e-07 ( -3.16251e-08 3.9922e-08 ) ergs/cm2
Band function
Time interval is from 33.768 sec. to 53.864 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.693991 ( -0.694049 -0.694049 )
beta : -3.30320 ( 3.30447 0.721666 )
Epeak [keV] : 20.9639 ( -20.967 5.57246 )
Norm@50keV : 0.271558 ( -0.271497 286.258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.96 using 59 PHA bins.
# Reduced chi-squared = 0.8902 for 55 degrees of freedom
# Null hypothesis probability = 7.033183e-01
Photon flux (15-150 keV) in 20.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93645e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.12398 (-0.932857 1.09043)
R^2/D10^2 : 0.653650 (-0.327927 0.685505)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9184 for 57 degrees of freedom
# Null hypothesis probability = 6.499805e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.738e-08 1.648e-08
25- 50 7.023e-08 2.054e-08
50-150 6.989e-09 4.200e-09
15-150 1.446e-07 3.617e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.1786 (-6.87095 10.316)
Norm : 1.91973 (-0.555325 0.879199)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8620 for 57 degrees of freedom
# Null hypothesis probability = 7.613554e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.912e-08 1.266e-08
25- 50 6.932e-08 1.760e-08
50-150 2.806e-08 1.769e-08
15-150 1.665e-07 3.858e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.54204 (-4.30915 1.6671)
R1^2/D10^2 : 1.74201 (-1.25804 -1.73669)
kT2 [keV] : 11.3386 (-9.73177 24.975)
R2^2/D10^2 : 2.41249E-02 (-0.0236291 0.585947)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8832 for 55 degrees of freedom
# Null hypothesis probability = 7.169644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.015e-08 3.884e-08
25- 50 6.766e-08 3.566e-08
50-150 2.932e-08 1.711e-08
15-150 1.671e-07 8.305e-08
Peak spectrum fit
Power-law model
Time interval is from 42.644 sec. to 43.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.63183 ( -0.597716 0.81465 )
Norm@50keV : 1.87562E-03 ( -0.00104601 0.00113776 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.81 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.187106e-01
Photon flux (15-150 keV) in 1 sec: 0.400323 ( -0.120715 0.121733 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95016e-08 ( -7.60162e-09 8.80251e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 42.644 sec. to 43.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12208 ( )
Epeak [keV] : 16.9850 ( )
Norm@50keV : 2.22943E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.18 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 56 degrees of freedom
# Null hypothesis probability = 1.109614e-01
Photon flux (15-150 keV) in 1 sec: 0.394448 ( -0.116181 0.119663 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68803e-08 ( -6.488e-09 1.02805e-08 ) ergs/cm2
Band function
Time interval is from 42.644 sec. to 43.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94031 ( -7.46477 -4.94031 )
beta : -3.11622 ( 3.11622 0.901346 )
Epeak [keV] : 19.4680 ( -19.468 5.59744 )
Norm@50keV : 2953.34 ( -832.682 1.11855e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.39 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 55 degrees of freedom
# Null hypothesis probability = 1.059527e-01
Photon flux (15-150 keV) in 1 sec: 0.395920 ( 6.60408 -0.059196 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85894e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.70870 (-1.68757 2.34995)
R^2/D10^2 : 1.86732 (-1.86678 6.89894)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.96 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 57 degrees of freedom
# Null hypothesis probability = 1.162368e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.501e-09 4.426e-09
25- 50 6.699e-09 4.286e-09
50-150 4.980e-10 5.010e-10
15-150 1.470e-08 8.520e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.7698 (-11.9098 28.5684)
Norm : 4.07295 (-1.97077 4.90236)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.212e-09 3.936e-09
25- 50 7.151e-09 4.313e-09
50-150 2.821e-09 2.578e-09
15-150 1.718e-08 1.040e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.30837 (-4.29421 3.1252)
R1^2/D10^2 : 4.78619 (-4.82873 -4.82873)
kT2 [keV] : 11.5048 (-11.4685 -11.4685)
R2^2/D10^2 : 4.77831E-02 (-0.0488926 5.87434)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.82 using 59 PHA bins.
# Reduced chi-squared = 1.251 for 55 degrees of freedom
# Null hypothesis probability = 9.964125e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.499e-09 4.532e-09
25- 50 6.722e-09 4.077e-09
50-150 3.130e-09 2.075e-09
15-150 1.735e-08 1.072e-08
Plot creation:
Sat Dec 17 09:31:07 EST 2016