batgrbproduct Analysis for Trigger=682059
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): Sat Apr 9 03:23:37 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger682059/GCN5_download_cron
======================================================================
Trigger: 00682059 Segment: 000
BAT Trigger Time: 481789559.872 [s; MET]
Trigger Stop: 481789560.256 [s; MET]
UTC: 2016-04-08T06:25:43.777280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 122.557289379001 Dec: 71.1402129989282 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.3
Image Trigger?: NO
Rate S/N Ratio: 38.9615194775563 [ if not an image trigger ]
Image S/N Ratio: 11.3
Flight Position: [ source = BAT ]
RA: 122.557289379001 Dec: 71.1402129989282 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 122.561530425181 Dec: 71.127820223831 [deg; J2000]
{ 08h 10m 14.8s , +71d 07' 40.2" }
+/- 1.82620975765807 [arcmin] (estimated 90% radius based on SNR)
+/- 1.02494599734677 [arcmin] (formal 1-sigma fit error)
SNR: 12.8669194299556
Angular difference between Flight and Ground position is 0.748105 arcmin
Partial Coding Fraction: 0.3320312 [ including projection effects ]
Duration
T90: 0.319999933242798 +/- 0.0368781685195268
Measured from: 0.03600013256073
to: 0.356000065803528 [s; relative to TRIGTIME]
T50: 0.179999947547913 +/- 0.0432666203311027
Measured from: 0.100000143051147
to: 0.28000009059906 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.303999960422516
to: 0.696000039577484 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0160000324249268
to: 0.37200003862381 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.025465 0.056563 0.089753 0.054547
0.007033 0.009607 0.010140 0.009440 [error]
Peak 0.024813 0.078421 0.121923 0.051105
0.011163 0.013534 0.013351 0.011835 [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 9.87e-09 2.70e-08 5.98e-08 3.49e-07 1.61e-07 4.46e-07 erg/cm2
Error 3.05e-09 5.04e-09 9.10e-09 1.24e-07 2.47e-08 1.27e-07 erg/cm2
Peak flux Power-law 4.32e-01 6.20e-01 6.61e-01 1.31e+00 2.12e+00 3.02e+00 ph/cm2/s
Error 1.40e-01 1.27e-01 1.02e-01 4.16e-01 3.40e-01 4.88e-01 ph/cm2/s
Fluence Cutoff-PL 8.84e-09 2.75e-08 6.28e-08 2.28e-07 1.60e-07 3.28e-07 erg/cm2
Error 3.92e-09 5.43e-09 1.20e-08 2.37e-07 2.52e-08 1.56e-07 erg/cm2
Peak flux Cutoff-PL 2.74e-01 6.41e-01 7.86e-01 4.86e-01 2.02e+00 2.19e+00 ph/cm2/s
Error 1.68e-01 1.51e-01 1.46e-01 4.23e-01 3.51e-01 5.47e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.66e-01 6.44e-01 7.83e-01 6.51e-01 2.01e+00 2.36e+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 0.854 0.252 - - 3.96e-02 5.94e-03 57.100 57
CPL 0.477 0.890 251.7 0.0 5.67e-02 0.00e+00 56.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.907 0.251 - - 1.85e-02 2.95e-03 54.650 57
CPL -0.580 1.491 105.4 111.0 7.66e-02 1.74e-01 50.240 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: 0.384000 sec.
T50 in the 50-300 keV band: 0.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.356 0.016 0.372
T90 0.320 0.036 0.356
T50 0.180 0.100 0.280
Peak 1.000 -0.304 0.696
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
122.5615 +71.1278 0.0150 45.9 -25.3 0.2421 12.9 TRIG_00682059
------------------------------------------
Foreground time interval of the image:
0.016 0.372 (delta_t = 0.356 [sec])
Background time interval of the image:
-40.671 0.016 (delta_t = 40.687 [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 0.016 sec. to 0.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.853944 ( -0.25794 0.245865 )
Norm@50keV : 3.96057E-02 ( -0.00598373 0.0059012 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.714343e-01
Photon flux (15-150 keV) in 0.356 sec: 4.54618 ( -0.676 0.677947 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6115e-07 ( -2.46376e-08 2.47129e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 0.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.477102 ( -1.28331 0.496238 )
Epeak [keV] : 251.662 ( -251.641 -251.641 )
Norm@50keV : 5.66637E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.72 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.481043e-01
Photon flux (15-150 keV) in 0.356 sec: 4.49566 ( -0.69339 0.69152 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60235e-07 ( -2.52578e-08 2.50866e-08 ) ergs/cm2
Band function
Time interval is from 0.016 sec. to 0.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99998 ( 9.99998 9.99998 )
beta : -0.853945 ( -0.245852 0.257941 )
Epeak [keV] : 16.0692 ( -16.0692 -16.0692 )
Norm@50keV : 5.38298 ( -0.81328 0.802076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.970548e-01
Photon flux (15-150 keV) in 0.356 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] : 25.4996 (-4.3447 5.97774)
R^2/D10^2 : 0.110019 (-0.0515965 0.0854262)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.37 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.222054e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.377e-09 1.242e-09
25- 50 2.508e-08 7.109e-09
50-150 1.206e-07 3.156e-08
15-150 1.500e-07 3.701e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-31.1809 -200)
Norm : 17.9555 (-2.79592 2.79592)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.08 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 57 degrees of freedom
# Null hypothesis probability = 3.337388e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.592e-08 9.028e-09
25- 50 3.062e-08 1.743e-08
50-150 6.716e-08 3.772e-08
15-150 1.137e-07 6.474e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.16481 (-2.31705 7.55732)
R1^2/D10^2 : 18.5089 (-18.2248 2307.82)
kT2 [keV] : 29.2510 (-5.93663 25.2989)
R2^2/D10^2 : 6.93870E-02 (-0.0601718 0.071401)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.77 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Null hypothesis probability = 4.456447e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.062e-08 4.836e-09
25- 50 2.343e-08 7.848e-09
50-150 1.251e-07 4.482e-08
15-150 1.592e-07 6.358e-08
Peak spectrum fit
Power-law model
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.906690 ( -0.257943 0.243426 )
Norm@50keV : 1.84689E-02 ( -0.00297383 0.00293411 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.65 using 59 PHA bins.
# Reduced chi-squared = 0.9588 for 57 degrees of freedom
# Null hypothesis probability = 5.635917e-01
Photon flux (15-150 keV) in 1 sec: 2.12002 ( -0.339342 0.341623 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06738e-07 ( -3.22545e-08 3.23607e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.579752 ( -1.74755 1.23532 )
Epeak [keV] : 105.357 ( -27.0149 194.889 )
Norm@50keV : 7.66096E-02 ( -0.0766096 0.271987 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.8972 for 56 degrees of freedom
# Null hypothesis probability = 6.916016e-01
Photon flux (15-150 keV) in 1 sec: 2.01781 ( -0.34927 0.35225 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98467e-07 ( -3.4587e-08 3.425e-08 ) ergs/cm2
Band function
Time interval is from -0.304 sec. to 0.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.579968 ( -0.936133 0.729776 )
beta : -10.00000 ( 10 3.45234e-06 )
Epeak [keV] : 105.339 ( -20.4896 194.419 )
Norm@50keV : 7.66348E-02 ( -0.0113266 0.272955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.9135 for 55 degrees of freedom
# Null hypothesis probability = 6.566817e-01
Photon flux (15-150 keV) in 1 sec: 2.00707 ( ) 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] : 23.2773 (-3.65091 4.83879)
R^2/D10^2 : 6.85713E-02 (-0.0309447 0.0501038)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.8942 for 57 degrees of freedom
# Null hypothesis probability = 6.995471e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.694e-09 2.137e-09
25- 50 3.656e-08 8.870e-09
50-150 1.479e-07 4.176e-08
15-150 1.912e-07 4.475e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.1604 -200)
Norm : 8.76363 (-1.42886 1.42886)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.23 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 57 degrees of freedom
# Null hypothesis probability = 8.414785e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.183e-08 1.243e-08
25- 50 4.199e-08 2.342e-08
50-150 9.210e-08 5.220e-08
15-150 1.559e-07 8.820e-08
Double BB
R1^2/D10^2 : 1.52025E-04 (-0.000152026 0.00895693)
kT2 [keV] : 19.9153 (-19.9153 7.01315)
R2^2/D10^2 : 9.69118E-02 (-0.0969122 1.70988)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.27 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.25 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9139 for 55 degrees of freedom
# Reduced chi-squared = 0.9136 for 55 degrees of freedom
# Reduced chi-squared = 0.9123 for 55 degrees of freedom
# Null hypothesis probability = 6.557994e-01
# Null hypothesis probability = 6.563766e-01
# Null hypothesis probability = 6.591572e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.636e-09 5.585e-09
25- 50 3.830e-08 2.589e-08
50-150 1.510e-07 8.385e-08
15-150 1.979e-07 1.062e-07
Plot creation:
Sat Apr 9 03:30:23 EDT 2016