batgrbproduct analysis for trigger=770502
batgrbproduct Analysis for Trigger=770502
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): Mon Sep 4 08:24:31 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger770502/GCN5_download_cron
======================================================================
Trigger: 00770502 Segment: 000
BAT Trigger Time: 526122008 [s; MET]
Trigger Stop: 526122112 [s; MET]
UTC: 2017-09-03T08:59:48.372260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 233.806075212174 Dec: -57.2442016660091 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 10.8
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.8
Flight Position: [ source = BAT ]
RA: 233.806075212174 Dec: -57.2442016660091 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 233.797783526371 Dec: -57.2468129573439 [deg; J2000]
{ 15h 35m 11.5s , -57d 14' 48.5" }
+/- 2.09494963076878 [arcmin] (estimated 90% radius based on SNR)
+/- 0.803841860706704 [arcmin] (formal 1-sigma fit error)
SNR: 10.5754528173969
Angular difference between Flight and Ground position is 0.311447 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 104 +/-
Measured from: 0
to: 104 [s; relative to TRIGTIME]
T50: 104 +/-
Measured from: 0
to: 104 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 104 second)
Measured from: 0
to: 104 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 104 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.573802 0.576407 0.390423 0.025866
0.066338 0.065321 0.055967 0.050592 [error]
Peak 0.573802 0.576407 0.390423 0.025866
0.066338 0.065321 0.055967 0.050592 [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 1.60e-07 2.39e-07 2.66e-07 5.61e-07 8.35e-07 1.23e-06 erg/cm2
Error 2.75e-08 2.82e-08 5.23e-08 2.21e-07 1.21e-07 2.75e-07 erg/cm2
Peak flux Power-law 5.00e-02 4.11e-02 2.29e-02 1.88e-02 1.22e-01 1.33e-01 ph/cm2/s
Error 8.75e-03 4.85e-03 4.34e-03 6.89e-03 1.45e-02 1.60e-02 ph/cm2/s
Fluence Cutoff-PL 1.49e-07 2.61e-07 2.62e-07 1.75e-07 7.76e-07 8.47e-07 erg/cm2
Error 3.14e-08 3.82e-08 5.89e-08 2.89e-07 1.33e-07 3.45e-07 erg/cm2
Peak flux Cutoff-PL 4.60e-02 4.46e-02 2.29e-02 7.45e-03 1.19e-01 1.21e-01 ph/cm2/s
Error 1.01e-02 6.41e-03 4.87e-03 1.09e-02 1.50e-02 1.79e-02 ph/cm2/s
Fluence Band 1.47e-07 2.60e-07 2.62e-07 1.87e-07 7.77e-07 8.61e-07 erg/cm2
Error 3.07e-08 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.64e-02 4.42e-02 2.32e-02 8.51e-03 1.19e-01 1.22e-01 ph/cm2/s
Error 1.01e-02 -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.843 0.219 - - 8.73e-04 1.25e-04 56.730 57
CPL 1.101 0.949 52.2 -18.2 2.29e-03 4.46e-03 54.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.843 0.219 - - 8.73e-04 1.25e-04 56.730 57
CPL 1.101 0.949 52.2 -18.2 2.29e-03 4.46e-03 54.570 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 104.000 0.000 104.000
T90 104.000 0.000 104.000
T50 104.000 0.000 104.000
Peak 104.000 0.000 104.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
233.7978 -57.2468 0.0181 9.8 34.9 1.5380 10.6 TRIG_00770502
------------------------------------------
Foreground time interval of the image:
0.000 104.000 (delta_t = 104.000 [sec])
Background time interval of the image:
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 0.000 sec. to 104.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84328 ( -0.213655 0.22458 )
Norm@50keV : 8.73488E-04 ( -0.000126353 0.000123446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 0.9952 for 57 degrees of freedom
# Null hypothesis probability = 4.852729e-01
Photon flux (15-150 keV) in 104 sec: 0.122444 ( -0.0144604 0.0144633 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.35365e-07 ( -1.19339e-07 1.225e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10101 ( -1.05769 0.839924 )
Epeak [keV] : 52.2454 ( -15.922 -52.2459 )
Norm@50keV : 2.28925E-03 ( -0.0022892 0.00662457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9746 for 56 degrees of freedom
# Null hypothesis probability = 5.289543e-01
Photon flux (15-150 keV) in 104 sec: 0.118823 ( -0.014996 0.015018 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75847e-07 ( -1.2803e-07 1.38363e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10131 ( -0.743604 1.14524 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 52.2333 ( -15.8981 -52.2333 )
Norm@50keV : 2.28836E-03 ( -0.00228836 0.00663048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9923 for 55 degrees of freedom
# Null hypothesis probability = 4.908137e-01
Photon flux (15-150 keV) in 104 sec: 0.119412 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.76629e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.4144 (-1.54545 1.78295)
R^2/D10^2 : 3.53835E-02 (-0.0147342 0.025414)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.69 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.782360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.008e-07 2.294e-08
25- 50 2.987e-07 4.857e-08
50-150 2.260e-07 6.484e-08
15-150 6.255e-07 1.026e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.3659 (-28.6698 58.6366)
Norm : 0.563529 (-0.0901803 0.113716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.73 using 59 PHA bins.
# Reduced chi-squared = 0.9602 for 57 degrees of freedom
# Null hypothesis probability = 5.607728e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.527e-07 2.720e-08
25- 50 2.559e-07 3.489e-08
50-150 3.798e-07 1.910e-07
15-150 7.884e-07 2.177e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.29662 (-1.47201 2.14687)
R1^2/D10^2 : 0.810917 (-0.642245 5.22029)
kT2 [keV] : 15.6643 (-3.06803 5.21757)
R2^2/D10^2 : 9.13257E-03 (-0.00634434 0.0126133)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.88 using 59 PHA bins.
# Reduced chi-squared = 0.9614 for 55 degrees of freedom
# Null hypothesis probability = 5.561981e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.557e-07 8.146e-08
25- 50 2.473e-07 1.201e-07
50-150 3.410e-07 1.974e-07
15-150 7.440e-07 3.296e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84328 ( -0.213655 0.22458 )
Norm@50keV : 8.73488E-04 ( -0.000126353 0.000123446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 0.9952 for 57 degrees of freedom
# Null hypothesis probability = 4.852729e-01
Photon flux (15-150 keV) in 104 sec: 0.122444 ( -0.0144604 0.0144633 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.35365e-07 ( -1.19339e-07 1.225e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10101 ( -1.05769 0.839924 )
Epeak [keV] : 52.2454 ( -15.922 -52.2459 )
Norm@50keV : 2.28925E-03 ( -0.0022892 0.00662457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9746 for 56 degrees of freedom
# Null hypothesis probability = 5.289543e-01
Photon flux (15-150 keV) in 104 sec: 0.118823 ( -0.014996 0.015018 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75847e-07 ( -1.2803e-07 1.38363e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 104.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10131 ( -0.743604 1.14528 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 52.2333 ( -15.8981 -52.2333 )
Norm@50keV : 2.28836E-03 ( -0.00228836 0.00663048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9923 for 55 degrees of freedom
# Null hypothesis probability = 4.908137e-01
Photon flux (15-150 keV) in 104 sec: 0.119412 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.76629e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.4144 (-1.54545 1.78295)
R^2/D10^2 : 3.53835E-02 (-0.0147342 0.025414)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.69 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.782360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.008e-07 2.247e-08
25- 50 2.987e-07 5.247e-08
50-150 2.260e-07 6.568e-08
15-150 6.255e-07 1.065e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.3659 (-28.6698 58.6366)
Norm : 0.563529 (-0.0901803 0.113716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.73 using 59 PHA bins.
# Reduced chi-squared = 0.9602 for 57 degrees of freedom
# Null hypothesis probability = 5.607728e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.527e-07 2.844e-08
25- 50 2.559e-07 3.713e-08
50-150 3.798e-07 1.896e-07
15-150 7.884e-07 2.149e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.29662 (-1.47201 2.14687)
R1^2/D10^2 : 0.810917 (-0.642245 5.22029)
kT2 [keV] : 15.6643 (-3.06803 5.21757)
R2^2/D10^2 : 9.13257E-03 (-0.00634434 0.0126133)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.88 using 59 PHA bins.
# Reduced chi-squared = 0.9614 for 55 degrees of freedom
# Null hypothesis probability = 5.561981e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.557e-07 7.738e-08
25- 50 2.473e-07 1.250e-07
50-150 3.410e-07 1.981e-07
15-150 7.440e-07 3.602e-07
Plot creation:
Mon Sep 4 08:47:58 EDT 2017