batgrbproduct Analysis for Trigger=703176
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): Wed Jul 6 17:04:36 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger703176/GCN5_download_cron
======================================================================
Trigger: 00703176 Segment: 000
BAT Trigger Time: 489445344 [s; MET]
Trigger Stop: 489445408 [s; MET]
UTC: 2016-07-05T21:02:07.482980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 168.085793209721 Dec: 46.7215352735169 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.56
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.56
Flight Position: [ source = BAT ]
RA: 168.085793209721 Dec: 46.7215352735169 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 168.107046587336 Dec: 46.706889385126 [deg; J2000]
{ 11h 12m 25.7s , +46d 42' 24.8" }
+/- 2.33006486096769 [arcmin] (estimated 90% radius based on SNR)
+/- 0.897532579869976 [arcmin] (formal 1-sigma fit error)
SNR: 9.08462356722735
Angular difference between Flight and Ground position is 1.239619 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 54.3679999709129 +/- 12.4123823520011
Measured from: -5.0919998884201
to: 49.2760000824928 [s; relative to TRIGTIME]
T50: 28.783999979496 +/- 10.7218206893608
Measured from: 4.10400009155273
to: 32.8880000710487 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 26.0440000295639
to: 27.0440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.0879999995232
to: 54.6959999799728 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.512633 0.338705 0.353931 0.064406
0.053330 0.055324 0.048613 0.043547 [error]
Peak 0.022421 0.013774 0.014995 0.006035
0.006466 0.006417 0.005698 0.005448 [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 1.32e-07 2.04e-07 2.37e-07 5.28e-07 7.29e-07 1.10e-06 erg/cm2
Error 2.78e-08 2.59e-08 5.09e-08 2.42e-07 1.14e-07 2.86e-07 erg/cm2
Peak flux Power-law 2.08e-01 1.55e-01 7.69e-02 5.44e-02 4.66e-01 4.95e-01 ph/cm2/s
Error 1.17e-01 5.58e-02 6.66e-02 9.50e-02 1.57e-01 1.73e-01 ph/cm2/s
Fluence Cutoff-PL 1.33e-07 2.05e-07 2.35e-07 5.14e-07 7.26e-07 1.09e-06 erg/cm2
Error 2.77e-08 2.59e-08 5.04e-08 3.25e-07 1.10e-07 2.97e-07 erg/cm2
Peak flux Cutoff-PL 2.26e-01 1.52e-01 6.63e-02 4.01e-02 4.64e-01 4.83e-01 ph/cm2/s
Error 1.19e-01 5.69e-02 5.58e-02 9.59e-02 1.57e-01 1.76e-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 1.786 0.267 - - 1.13e-03 1.71e-04 53.150 57
CPL 3.150 0.801 331.1 98.0 2.69e-04 3.94e-04 49.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.007 0.997 - - 3.09e-03 1.63e-03 63.980 57
CPL 2.128 0.842 52.5 0.0 2.31e-03 0.00e+00 63.380 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: 76.096000 sec.
T50 in the 50-300 keV band: 33.408000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 69.784 -15.088 54.696
T90 54.368 -5.092 49.276
T50 28.784 4.104 32.888
Peak 1.000 26.044 27.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
168.1070 +46.7069 0.0212 32.1 9.3 1.0760 9.1 TRIG_00703176
------------------------------------------
Foreground time interval of the image:
-15.088 54.696 (delta_t = 69.784 [sec])
Background time interval of the image:
-239.000 -15.088 (delta_t = 223.912 [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 -15.088 sec. to 54.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78647 ( -0.258412 0.275228 )
Norm@50keV : 1.13454E-03 ( -0.00017473 0.000166809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9325 for 57 degrees of freedom
# Null hypothesis probability = 6.201979e-01
Photon flux (15-150 keV) in 69.78 sec: 0.155523 ( -0.0199263 0.0199513 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29187e-07 ( -1.12716e-07 1.14681e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.088 sec. to 54.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.15012 ( -1.17847 0.423894 )
Epeak [keV] : 331.129 ( -67.5515 128.519 )
Norm@50keV : 2.69200E-04 ( -0.000271424 0.000516072 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.82 using 59 PHA bins.
# Reduced chi-squared = 0.8896 for 56 degrees of freedom
# Null hypothesis probability = 7.065998e-01
Photon flux (15-150 keV) in 69.78 sec: 0.155756 ( -0.01975 0.019715 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26354e-07 ( -1.09123e-07 1.10071e-07 ) ergs/cm2
Band function
Time interval is from -15.088 sec. to 54.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43085 ( 1.43132 1.43132 )
beta : -1.78403 ( 1.78639 0.258152 )
Epeak [keV] : 18.1728 ( -18.184 -18.184 )
Norm@50keV : 2.73562E-03 ( -0.00273841 1.08048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9664 for 55 degrees of freedom
# Null hypothesis probability = 5.455380e-01
Photon flux (15-150 keV) in 69.78 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] : 14.2987 (-3.0575 3.61065)
R^2/D10^2 : 1.85176E-02 (-0.0183122 0.0249296)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.68 using 59 PHA bins.
# Reduced chi-squared = 1.538 for 57 degrees of freedom
# Null hypothesis probability = 5.590867e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.568e-08 1.557e-08
25- 50 2.114e-07 4.424e-08
50-150 2.877e-07 7.822e-08
15-150 5.548e-07 1.119e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 144.960 (-67.8717 -143.428)
Norm : 0.627062 (-0.0906239 0.133729)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.07 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.725147e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.127e-07 5.743e-08
25- 50 2.078e-07 1.110e-07
50-150 4.044e-07 2.416e-07
15-150 7.249e-07 4.138e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.94437 (-0.883597 1.11226)
R1^2/D10^2 : 2.37648 (-1.64604 6.68431)
kT2 [keV] : 24.1592 (-5.26442 8.46854)
R2^2/D10^2 : 2.60664E-03 (-0.00161239 0.00342152)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.55 using 59 PHA bins.
# Reduced chi-squared = 0.8282 for 55 degrees of freedom
# Null hypothesis probability = 8.143022e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.596e-07 8.062e-08
25- 50 1.535e-07 5.638e-08
50-150 4.553e-07 1.991e-07
15-150 7.684e-07 2.866e-07
Peak spectrum fit
Power-law model
Time interval is from 26.044 sec. to 27.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00717 ( -0.87683 1.11735 )
Norm@50keV : 3.09493E-03 ( -0.00181024 0.0014559 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.98 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.449179e-01
Photon flux (15-150 keV) in 1 sec: 0.465801 ( -0.157086 0.157066 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85002e-08 ( -1.31078e-08 1.42572e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.044 sec. to 27.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12804 ( -1.02495 0.659966 )
Epeak [keV] : 52.5232 ( )
Norm@50keV : 2.31296E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.38 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 56 degrees of freedom
# Null hypothesis probability = 2.322453e-01
Photon flux (15-150 keV) in 1 sec: 0.464237 ( -0.156883 0.157368 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79168e-08 ( -1.25525e-08 1.48411e-08 ) ergs/cm2
Band function
Time interval is from 26.044 sec. to 27.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99539 ( 9.99539 9.99539 )
beta : -2.01029 ( -1.11291 0.87874 )
Epeak [keV] : 17.6085 ( -17.6085 -17.6085 )
Norm@50keV : 0.420054 ( -0.24585 0.198066 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.98 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 55 degrees of freedom
# Null hypothesis probability = 1.904406e-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] : 5.01690 (-1.57862 2.76115)
R^2/D10^2 : 3.34605 (-3.34594 17.2258)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.01 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 57 degrees of freedom
# Null hypothesis probability = 1.507934e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.248e-09 5.010e-09
25- 50 5.432e-09 3.382e-09
50-150 2.245e-10 2.313e-10
15-150 1.390e-08 8.325e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.546 (-199.546 -199.546)
Norm : 1.76940 (-0.621002 7.4257)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.82 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.981393e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.141e-09 3.303e-09
25- 50 8.875e-09 5.440e-09
50-150 1.432e-08 1.147e-08
15-150 2.833e-08 2.032e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.55006 (-1.48493 1.79366)
R1^2/D10^2 : 4.90044 (-3.99963 20.1601)
kT2 [keV] : 99.8661 (-74.2459 -99.9504)
R2^2/D10^2 : 2.65903E-04 (-0.000219277 0.00582147)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.03 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Null hypothesis probability = 3.642916e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.208e-09 4.994e-09
25- 50 5.438e-09 3.059e-09
50-150 2.566e-08 2.383e-08
15-150 3.930e-08 2.590e-08
Plot creation:
Wed Jul 6 17:09:36 EDT 2016