batgrbproduct Analysis for Trigger=711084
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): Mon Sep 5 20:51:43 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger711084/batgroup_hand_proc
======================================================================
Trigger: 00711084 Segment: 000
BAT Trigger Time: 494767155.2 [s; MET]
Trigger Stop: 494767156.224 [s; MET]
UTC: 2016-09-05T11:18:58.384380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 162.236616675553 Dec: -50.8000612070971 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.29
Image Trigger?: NO
Rate S/N Ratio: 42.5910788780937 [ if not an image trigger ]
Image S/N Ratio: 16.29
Flight Position: [ source = BAT ]
RA: 162.236616675553 Dec: -50.8000612070971 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 162.248850817234 Dec: -50.8025504121035 [deg; J2000]
{ 10h 48m 59.7s , -50d 48' 09.2" }
+/- 0.553746205958928 [arcmin] (estimated 90% radius based on SNR)
+/- 0.160321008022037 [arcmin] (formal 1-sigma fit error)
SNR: 70.7648008968436
Angular difference between Flight and Ground position is 0.487375 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 64 +/- 16
Measured from: -15.1999999880791
to: 48.8000000119209 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.800000011920929
to: 16.8000000119209 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.30000001192093
to: 9.30000001192093 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.1999999880791
to: 96.8000000119209 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.147272 7.284007 7.467525 2.418210
0.076806 0.078431 0.073534 0.060211 [error]
Peak 0.161227 0.272460 0.302114 0.117165
0.009514 0.011064 0.011553 0.009516 [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 1.17e-06 2.85e-06 5.53e-06 2.64e-05 1.50e-05 3.60e-05 erg/cm2
Error 4.31e-08 6.14e-08 8.70e-08 1.02e-06 2.30e-07 1.04e-06 erg/cm2
Peak flux Power-law 1.32e+00 1.85e+00 1.93e+00 3.69e+00 6.26e+00 8.78e+00 ph/cm2/s
Error 1.18e-01 9.83e-02 9.03e-02 3.88e-01 2.67e-01 4.35e-01 ph/cm2/s
Fluence Cutoff-PL 1.12e-06 2.85e-06 5.62e-06 2.29e-05 1.49e-05 3.25e-05 erg/cm2
Error 6.08e-08 6.23e-08 1.14e-07 3.53e-06 2.39e-07 2.60e-06 erg/cm2
Peak flux Cutoff-PL 1.31e+00 1.85e+00 1.93e+00 3.67e+00 6.26e+00 8.76e+00 ph/cm2/s
Error 1.32e-01 6.92e-02 1.01e-01 7.18e-01 2.66e-01 7.48e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- 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 1.042 0.029 - - 1.25e-02 2.05e-04 43.080 57
CPL 0.912 0.120 535.2 2089.1 1.41e-02 1.18e-03 39.670 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.941 0.077 - - 5.45e-02 2.31e-03 41.760 57
CPL 0.935 0.194 9992.3 0.0 5.48e-02 1.11e-02 41.760 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: 36.992000 sec.
T50 in the 50-300 keV band: 12.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 112.000 -15.200 96.800
T90 64.000 -15.200 48.800
T50 16.000 0.800 16.800
Peak 1.000 8.300 9.300
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
162.2489 -50.8026 0.0027 9.3791 -70.6209 8.6705526 70.765 TRIG_00711084
Foreground time interval of the image:
-15.200 11.701 (delta_t = 26.901 [sec])
Background time interval of the image:
-46.899 -15.200 (delta_t = 31.699 [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 -15.200 sec. to 96.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04219 ( -0.0293155 0.0291806 )
Norm@50keV : 1.25321E-02 ( -0.000205135 0.000204664 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.08 using 59 PHA bins.
# Reduced chi-squared = 0.7558 for 57 degrees of freedom
# Null hypothesis probability = 9.137446e-01
Photon flux (15-150 keV) in 112 sec: 1.44659 ( -0.0249758 0.0250348 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49572e-05 ( -2.30255e-07 2.30326e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.200 sec. to 96.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.912142 ( -0.122924 0.117985 )
Epeak [keV] : 535.206 ( -226.08 3952.16 )
Norm@50keV : 1.40887E-02 ( -0.000752879 0.00160673 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.67 using 59 PHA bins.
# Reduced chi-squared = 0.7085 for 56 degrees of freedom
# Null hypothesis probability = 9.515525e-01
Photon flux (15-150 keV) in 112 sec: 1.43349 ( -0.0274 0.02752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49008e-05 ( -2.38896e-07 2.38224e-07 ) ergs/cm2
Band function
Time interval is from -15.200 sec. to 96.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.9999 -4.9999 )
beta : -1.04581 ( -0.0297723 0.0297696 )
Epeak [keV] : 23.0075 ( -23.0075 5.39574 )
Norm@50keV : 1403.47 ( -21.0605 1.975e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.77 using 59 PHA bins.
# Reduced chi-squared = 0.7777 for 55 degrees of freedom
# Null hypothesis probability = 8.850248e-01
Photon flux (15-150 keV) in 112 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] : 24.1844 ( )
R^2/D10^2 : 3.74569E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 645.99 using 59 PHA bins.
# Reduced chi-squared = 11.333 for 57 degrees of freedom
# Null hypothesis probability = 1.020487e-100
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.337e-07 1.406e-08
25- 50 2.418e-06 5.768e-08
50-150 1.053e-05 2.369e-07
15-150 1.338e-05 2.072e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 6.40697 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1027.53 using 59 PHA bins.
# Reduced chi-squared = 18.0268 for 57 degrees of freedom
# Null hypothesis probability = 4.856924e-178
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.787e-06 2.968e-08
25- 50 3.437e-06 6.104e-08
50-150 7.538e-06 1.327e-07
15-150 1.276e-05 2.240e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.60097 (-0.762204 0.815825)
R1^2/D10^2 : 0.379299 (-0.0801018 0.108802)
kT2 [keV] : 38.9332 (-2.76848 3.55778)
R2^2/D10^2 : 7.27841E-03 (-0.00172593 0.00192972)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9250 for 55 degrees of freedom
# Null hypothesis probability = 6.329972e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.480e-07 6.625e-08
25- 50 2.941e-06 1.058e-07
50-150 1.102e-05 3.590e-07
15-150 1.491e-05 4.368e-07
Peak spectrum fit
Power-law model
Time interval is from 8.300 sec. to 9.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.941251 ( -0.0776353 0.0770051 )
Norm@50keV : 5.44969E-02 ( -0.00230863 0.00230487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7326 for 57 degrees of freedom
# Null hypothesis probability = 9.351231e-01
Photon flux (15-150 keV) in 1 sec: 6.25960 ( -0.266954 0.267039 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0206e-07 ( -2.86963e-08 2.88349e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.300 sec. to 9.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.935041 ( -0.309822 0.0776308 )
Epeak [keV] : 9992.27 ( -9991.24 -9991.24 )
Norm@50keV : 5.48431E-02 ( -0.00229944 0.0199293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7457 for 56 degrees of freedom
# Null hypothesis probability = 9.216083e-01
Photon flux (15-150 keV) in 1 sec: 6.25770 ( -0.26592 0.26697 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.02175e-07 ( -3.0443e-08 2.8677e-08 ) ergs/cm2
Band function
Time interval is from 8.300 sec. to 9.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -4.99997 -4.99997 )
beta : -0.952626 ( -0.0797674 0.079697 )
Epeak [keV] : 23.1202 ( -23.1202 5.18081 )
Norm@50keV : 5449.03 ( -228.199 7.63088e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.43 using 59 PHA bins.
# Reduced chi-squared = 0.7532 for 55 degrees of freedom
# Null hypothesis probability = 9.121805e-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] : 22.3260 ( )
R^2/D10^2 : 0.214974 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 136.18 using 59 PHA bins.
# Reduced chi-squared = 2.3891 for 57 degrees of freedom
# Null hypothesis probability = 1.988081e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.970e-08 1.650e-09
25- 50 1.051e-07 6.695e-09
50-150 3.913e-07 2.700e-08
15-150 5.161e-07 2.815e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 24.7232 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 204.86 using 59 PHA bins.
# Reduced chi-squared = 3.5940 for 57 degrees of freedom
# Null hypothesis probability = 1.505962e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.156e-08 2.945e-09
25- 50 1.184e-07 5.650e-09
50-150 2.597e-07 1.240e-08
15-150 4.397e-07 2.635e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.8511 (-2.35071 2.5856)
R1^2/D10^2 : 1.23321 (-0.490814 1.10687)
kT2 [keV] : 52.2723 (-16.111 80.9807)
R2^2/D10^2 : 1.48917E-02 (-0.0105103 0.0168569)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.06 using 59 PHA bins.
# Reduced chi-squared = 0.8375 for 55 degrees of freedom
# Null hypothesis probability = 7.991572e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.454e-08 5.805e-09
25- 50 1.154e-07 1.882e-08
50-150 4.546e-07 1.792e-07
15-150 6.045e-07 1.968e-07
Plot creation:
Mon Sep 5 21:16:27 EDT 2016