batgrbproduct Analysis for Trigger=707231
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): Fri Aug 5 01:57:19 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger707231/GCN5_download_cron
======================================================================
Trigger: 00707231 Segment: 000
BAT Trigger Time: 491967184 [s; MET]
Trigger Stop: 491967248 [s; MET]
UTC: 2016-08-04T01:32:47.341920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 221.638607807751 Dec: 10.0011165699529 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.89
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.89
Flight Position: [ source = BAT ]
RA: 221.638607807751 Dec: 10.0011165699529 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 221.651670770508 Dec: 10.0017173751793 [deg; J2000]
{ 14h 46m 36.4s , +10d 00' 06.2" }
+/- 1.29974550597118 [arcmin] (estimated 90% radius based on SNR)
+/- 0.452481123287985 [arcmin] (formal 1-sigma fit error)
SNR: 20.9152774823552
Angular difference between Flight and Ground position is 0.772708 arcmin
Partial Coding Fraction: 0.2851562 [ including projection effects ]
Duration
T90: 144.199999988079 +/- 19.2297524738119
Measured from: 37.8680000901222
to: 182.068000078201 [s; relative to TRIGTIME]
T50: 50.5519999265671 +/- 2.73241868886491
Measured from: 78.7080001235008
to: 129.260000050068 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 88.5920000076294
to: 89.5920000076294 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.1399999856949
to: 247.148000001907 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.236270 7.688049 4.723901 0.640286
0.136557 0.139262 0.121346 0.103206 [error]
Peak 0.077919 0.124187 0.095178 0.017706
0.011704 0.012660 0.011305 0.008799 [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 2.62e-06 3.58e-06 3.62e-06 6.62e-06 1.19e-05 1.64e-05 erg/cm2
Error 1.25e-07 9.93e-08 1.28e-07 5.10e-07 3.12e-07 6.00e-07 erg/cm2
Peak flux Power-law 1.11e+00 9.85e-01 6.03e-01 5.59e-01 2.93e+00 3.25e+00 ph/cm2/s
Error 2.03e-01 1.16e-01 9.06e-02 1.66e-01 3.41e-01 3.67e-01 ph/cm2/s
Fluence Cutoff-PL 2.30e-06 3.71e-06 3.73e-06 3.31e-06 1.15e-05 1.31e-05 erg/cm2
Error 1.63e-07 1.12e-07 1.41e-07 8.00e-07 3.61e-07 8.92e-07 erg/cm2
Peak flux Cutoff-PL 1.01e+00 1.04e+00 6.33e-01 3.18e-01 2.87e+00 3.00e+00 ph/cm2/s
Error 2.40e-01 1.41e-01 1.04e-01 2.53e-01 3.49e-01 4.45e-01 ph/cm2/s
Fluence Band 2.28e-06 3.70e-06 3.72e-06 3.88e-06 1.14e-05 1.36e-05 erg/cm2
Error -------- -------- -------- -------- 3.62e-07 -------- erg/cm2
Peak flux Band 1.02e+00 1.03e+00 6.32e-01 3.46e-01 2.88e+00 3.03e+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 1.987 0.050 - - 5.84e-03 1.55e-04 79.050 57
CPL 1.400 0.226 52.7 5.4 1.12e-02 2.79e-03 56.980 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.708 0.192 - - 2.20e-02 2.63e-03 68.560 57
CPL 1.155 0.774 75.9 -26.3 4.23e-02 4.82e-02 66.980 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: 154.816000 sec.
T50 in the 50-300 keV band: 43.712000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 222.008 25.140 247.148
T90 144.200 37.868 182.068
T50 50.552 78.708 129.260
Peak 1.000 88.592 89.592
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
221.6517 +10.0017 0.0092 47.4 7.9 3.9557 20.9 TRIG_00707231
------------------------------------------
Foreground time interval of the image:
25.140 71.901 (delta_t = 46.761 [sec])
Background time interval of the image:
-239.000 25.140 (delta_t = 264.140 [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 25.140 sec. to 247.148 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98653 ( -0.0496342 0.0500329 )
Norm@50keV : 5.84098E-03 ( -0.000155548 0.000155282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.05 using 59 PHA bins.
# Reduced chi-squared = 1.387 for 57 degrees of freedom
# Null hypothesis probability = 2.825360e-02
Photon flux (15-150 keV) in 222 sec: 0.870767 ( -0.0261995 0.0263406 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19499e-05 ( -3.11861e-07 3.12014e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.140 sec. to 247.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40001 ( -0.23182 0.220791 )
Epeak [keV] : 52.6606 ( -5.06021 5.6898 )
Norm@50keV : 1.11769E-02 ( -0.00237593 0.00320965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.98 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 56 degrees of freedom
# Null hypothesis probability = 4.383424e-01
Photon flux (15-150 keV) in 222 sec: 0.826226 ( -0.029976 0.030252 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14504e-05 ( -3.61838e-07 3.60928e-07 ) ergs/cm2
Band function
Time interval is from 25.140 sec. to 247.148 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38870 ( -0.228706 0.445419 )
beta : -2.79699 ( 2.79701 0.599497 )
Epeak [keV] : 52.3991 ( -8.05998 5.82565 )
Norm@50keV : 1.13363E-02 ( -0.00248166 0.00881931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.036927e-01
Photon flux (15-150 keV) in 222 sec: 0.825586 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14258e-05 ( -1.14243e-05 -3.60661e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.9549 ( )
R^2/D10^2 : 0.142001 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 313.10 using 59 PHA bins.
# Reduced chi-squared = 5.4929 for 57 degrees of freedom
# Null hypothesis probability = 4.891096e-37
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.122e-06 5.894e-08
25- 50 3.850e-06 1.199e-07
50-150 4.077e-06 2.176e-07
15-150 9.050e-06 2.830e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.1223 (-6.6641 7.61246)
Norm : 3.88684 (-0.174654 0.184288)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.43 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.590929e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.244e-06 9.779e-08
25- 50 3.728e-06 1.032e-07
50-150 5.397e-06 2.620e-07
15-150 1.137e-05 3.008e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.60703 (-0.751906 0.788388)
R1^2/D10^2 : 1.18917 (-0.385316 0.677866)
kT2 [keV] : 20.4723 (-1.8226 2.38216)
R2^2/D10^2 : 1.80268E-02 (-0.00683056 0.00916349)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.19 using 59 PHA bins.
# Reduced chi-squared = 1.276 for 55 degrees of freedom
# Null hypothesis probability = 8.146657e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.057e-06 2.070e-07
25- 50 3.741e-06 2.309e-07
50-150 5.332e-06 3.974e-07
15-150 1.113e-05 6.505e-07
Peak spectrum fit
Power-law model
Time interval is from 88.592 sec. to 89.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70812 ( -0.188856 0.195155 )
Norm@50keV : 2.20057E-02 ( -0.00264054 0.00261222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.56 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.402949e-01
Photon flux (15-150 keV) in 1 sec: 2.93095 ( -0.340251 0.340913 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.0362e-07 ( -2.52854e-08 2.54652e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 88.592 sec. to 89.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15477 ( -0.874279 0.673487 )
Epeak [keV] : 75.8862 ( -23.3165 -75.8862 )
Norm@50keV : 4.23015E-02 ( -0.021967 0.0744819 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.98 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 56 degrees of freedom
# Null hypothesis probability = 1.494583e-01
Photon flux (15-150 keV) in 1 sec: 2.87407 ( -0.34895 0.34925 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97939e-07 ( -2.68e-08 2.6802e-08 ) ergs/cm2
Band function
Time interval is from 88.592 sec. to 89.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.15473 ( -0.482092 0.721339 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 75.8713 ( -22.6711 -75.8713 )
Norm@50keV : 4.22987E-02 ( -0.0219685 0.0745366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.98 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 55 degrees of freedom
# Null hypothesis probability = 1.289941e-01
Photon flux (15-150 keV) in 1 sec: 2.88438 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97775e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4915 (-1.80673 2.1002)
R^2/D10^2 : 0.474729 (-0.19491 0.327369)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.21 using 59 PHA bins.
# Reduced chi-squared = 1.477 for 57 degrees of freedom
# Null hypothesis probability = 1.104372e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.830e-08 3.870e-09
25- 50 6.556e-08 1.009e-08
50-150 7.705e-08 1.815e-08
15-150 1.609e-07 2.685e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 136.787 (-49.9124 -135.22)
Norm : 12.2183 (-1.60265 2.07118)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.08 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.697697e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.160e-08 7.790e-09
25- 50 5.777e-08 1.313e-08
50-150 1.096e-07 6.036e-08
15-150 1.990e-07 7.407e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.72567 (-2.04347 2.48476)
R1^2/D10^2 : 3.71993 (-2.38858 6.65343)
kT2 [keV] : 22.9355 (-5.63621 12.5798)
R2^2/D10^2 : 5.09053E-02 (-0.0412011 0.0682597)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.35 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.405251e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.074e-08 1.647e-08
25- 50 5.909e-08 2.661e-08
50-150 1.081e-07 5.828e-08
15-150 1.980e-07 8.369e-08
Plot creation:
Fri Aug 5 02:03:32 EDT 2016