batgrbproduct Analysis for Trigger=729410
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 Jan 2 11:26:55 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger729410/batgroup_hand_proc
======================================================================
Trigger: 00729410 Segment: 000
BAT Trigger Time: 504992824 [s; MET]
Trigger Stop: 504992936 [s; MET]
UTC: 2017-01-01T19:46:45.603660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 259.889321778484 Dec: -25.0252159272683 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.13
Flight Position: [ source = BAT ]
RA: 259.889321778484 Dec: -25.0252159272683 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 259.915251468015 Dec: -25.0097322374122 [deg; J2000]
{ 17h 19m 39.7s , -25d 00' 35.0" }
+/- 2.24510167156626 [arcmin] (estimated 90% radius based on SNR)
+/- 0.930195238304054 [arcmin] (formal 1-sigma fit error)
SNR: 9.57971627843877
Angular difference between Flight and Ground position is 1.688390 arcmin
Partial Coding Fraction: 0.3515625 [ including projection effects ]
Duration
T90: 112 +/-
Measured from: 0
to: 112 [s; relative to TRIGTIME]
T50: 112 +/-
Measured from: 0
to: 112 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 112 second)
Measured from: 0
to: 112 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.545003 1.054477 0.728657 0.057657
0.135536 0.119892 0.098963 0.080969 [error]
Peak 0.545003 1.054477 0.728657 0.057657
0.135536 0.119892 0.098963 0.080969 [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 2.14e-07 3.94e-07 5.59e-07 1.67e-06 1.60e-06 2.83e-06 erg/cm2
Error 5.38e-08 6.10e-08 9.60e-08 6.18e-07 2.39e-07 6.84e-07 erg/cm2
Peak flux Power-law 6.16e-02 6.21e-02 4.40e-02 4.96e-02 1.87e-01 2.17e-01 ph/cm2/s
Error 1.57e-02 9.87e-03 7.34e-03 1.69e-02 2.80e-02 3.06e-02 ph/cm2/s
Fluence Cutoff-PL 1.72e-07 4.30e-07 6.02e-07 5.01e-07 1.50e-06 1.70e-06 erg/cm2
Error 6.47e-08 7.44e-08 1.13e-07 7.85e-07 2.58e-07 7.37e-07 erg/cm2
Peak flux Cutoff-PL 4.89e-02 6.69e-02 4.81e-02 1.96e-02 1.77e-01 1.83e-01 ph/cm2/s
Error 1.90e-02 1.17e-02 8.80e-03 2.02e-02 2.94e-02 3.58e-02 ph/cm2/s
Fluence Band 1.72e-07 4.28e-07 6.00e-07 5.21e-07 1.50e-06 1.74e-06 erg/cm2
Error 6.19e-08 7.39e-08 1.02e-07 -------- -------- -------- erg/cm2
Peak flux Band 5.16e-02 6.54e-02 4.78e-02 2.55e-02 1.81e-01 1.91e-01 ph/cm2/s
Error -------- -------- 8.45e-03 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.497 0.239 - - 1.50e-03 2.12e-04 68.400 57
CPL 0.419 1.189 76.3 166.1 4.98e-03 1.08e-02 65.180 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 1.497 0.239 - - 1.50e-03 2.12e-04 68.400 57
CPL 0.419 1.189 76.3 166.1 4.98e-03 1.08e-02 65.180 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 112.000 0.000 112.000
T90 112.000 0.000 112.000
T50 112.000 0.000 112.000
Peak 112.000 0.000 112.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
259.9153 -25.0097 0.0202 34.6713 -60.4635 2.5424338 9.580 TRIG_00729410
Foreground time interval of the image:
0.000 112.000 (delta_t = 112.000 [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 112.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49661 ( -0.239014 0.238164 )
Norm@50keV : 1.50192E-03 ( -0.000211821 0.000211615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.432863e-01
Photon flux (15-150 keV) in 112 sec: 0.187328 ( -0.0278534 0.028055 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59666e-06 ( -2.37719e-07 2.39529e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.418708 ( -1.34949 1.02874 )
Epeak [keV] : 76.3471 ( -19.3756 312.789 )
Norm@50keV : 4.97904E-03 ( -0.00497903 0.0165222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.18 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 56 degrees of freedom
# Null hypothesis probability = 1.876722e-01
Photon flux (15-150 keV) in 112 sec: 0.177430 ( -0.029276 0.029545 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49654e-06 ( -2.56346e-07 2.59482e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.418702 ( -1.13603 1.24455 )
beta : -10.0000 ( 10 1.77636e-14 )
Epeak [keV] : 76.3346 ( -19.3729 245.127 )
Norm@50keV : 4.97924E-03 ( -0.00497924 0.0165441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.18 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.637049e-01
Photon flux (15-150 keV) in 112 sec: 0.180599 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49905e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7219 (-2.34497 2.87828)
R^2/D10^2 : 1.84199E-02 (-0.00838672 0.014561)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.131594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.058e-07 3.284e-08
25- 50 4.386e-07 9.979e-08
50-150 7.527e-07 2.117e-07
15-150 1.297e-06 2.360e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-85.0295 -199.363)
Norm : 0.775236 (-0.108289 0.118229)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.98 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.719773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.162e-07 1.206e-07
25- 50 4.159e-07 2.302e-07
50-150 9.122e-07 5.087e-07
15-150 1.544e-06 8.596e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.92547 (-5.71704 5.1301)
R1^2/D10^2 : 7.50751E-02 (-0.0527121 2.62819)
kT2 [keV] : 25.0423 (-21.2707 96.2689)
R2^2/D10^2 : 2.48950E-03 (-0.00243721 0.00714271)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.84 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 55 degrees of freedom
# Null hypothesis probability = 1.710632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.602e-07 9.027e-08
25- 50 4.447e-07 2.426e-07
50-150 9.024e-07 4.926e-07
15-150 1.507e-06 7.700e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49661 ( -0.239014 0.238164 )
Norm@50keV : 1.50192E-03 ( -0.000211821 0.000211615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.432863e-01
Photon flux (15-150 keV) in 112 sec: 0.187328 ( -0.0278534 0.028055 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59666e-06 ( -2.37719e-07 2.39529e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.418708 ( -1.34949 1.02874 )
Epeak [keV] : 76.3471 ( -19.3756 312.789 )
Norm@50keV : 4.97904E-03 ( -0.00497903 0.0165222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.18 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 56 degrees of freedom
# Null hypothesis probability = 1.876722e-01
Photon flux (15-150 keV) in 112 sec: 0.177430 ( -0.029276 0.029545 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49654e-06 ( -2.56346e-07 2.59482e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.418702 ( -1.13603 1.24525 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 76.3346 ( -19.3729 245.126 )
Norm@50keV : 4.97924E-03 ( -0.00497924 0.0165441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.18 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.637049e-01
Photon flux (15-150 keV) in 112 sec: 0.180599 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49905e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7219 (-2.34497 2.87828)
R^2/D10^2 : 1.84199E-02 (-0.00838672 0.014561)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.131594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.058e-07 2.880e-08
25- 50 4.386e-07 8.338e-08
50-150 7.527e-07 1.900e-07
15-150 1.297e-06 2.538e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-85.0295 -199.363)
Norm : 0.775236 (-0.108289 0.118229)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.98 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.719773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.162e-07 1.219e-07
25- 50 4.159e-07 2.289e-07
50-150 9.122e-07 5.139e-07
15-150 1.544e-06 8.613e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.92547 (-5.71704 5.1301)
R1^2/D10^2 : 7.50751E-02 (-0.0527121 2.62819)
kT2 [keV] : 25.0423 (-21.9979 97.0282)
R2^2/D10^2 : 2.48950E-03 (-0.00243721 0.0071426)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.84 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 55 degrees of freedom
# Null hypothesis probability = 1.710632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.602e-07 9.486e-08
25- 50 4.447e-07 2.358e-07
50-150 9.024e-07 5.097e-07
15-150 1.507e-06 7.650e-07
Plot creation:
Mon Jan 2 11:36:22 EST 2017