batgrbproduct Analysis for Trigger=609736
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): Sun Aug 17 20:19:50 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger609736/GCN5_download_cron
======================================================================
Trigger: 00609736 Segment: 000
BAT Trigger Time: 429951733.76 [s; MET]
Trigger Stop: 429951734.784 [s; MET]
UTC: 2014-08-17T07:02:01.353900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 127.255706670156 Dec: 58.1893395054857 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.88
Image Trigger?: NO
Rate S/N Ratio: 88.3345911860127 [ if not an image trigger ]
Image S/N Ratio: 21.88
Flight Position: [ source = BAT ]
RA: 127.255706670156 Dec: 58.1893395054857 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 127.243638449286 Dec: 58.1908853669834 [deg; J2000]
{ 08h 28m 58.5s , +58d 11' 27.2" }
+/- 0.711577096413892 [arcmin] (estimated 90% radius based on SNR)
+/- 0.200924239440063 [arcmin] (formal 1-sigma fit error)
SNR: 49.457238606241
Angular difference between Flight and Ground position is 0.392780 arcmin
Partial Coding Fraction: 0.765625 [ including projection effects ]
Duration
T90: 243.912000000477 +/- 12.4987079554302
Measured from: -8.06799989938736
to: 235.844000101089 [s; relative to TRIGTIME]
T50: 213.367999970913 +/- 2.28240225459174
Measured from: 0.668000102043152
to: 214.036000072956 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.64399999380112
to: 3.64399999380112 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.2599999904633
to: 270.272000014782 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.909815 2.564266 2.039125 0.493309
0.087611 0.091266 0.080270 0.070812 [error]
Peak 0.147630 0.304837 0.333128 0.089470
0.008211 0.010123 0.010433 0.007373 [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 6.06e-07 1.12e-06 1.61e-06 4.85e-06 4.58e-06 8.19e-06 erg/cm2
Error 4.73e-08 5.05e-08 8.22e-08 5.65e-07 1.99e-07 6.13e-07 erg/cm2
Peak flux Power-law 1.65e+00 2.19e+00 2.13e+00 3.70e+00 7.18e+00 9.67e+00 ph/cm2/s
Error 1.18e-01 9.67e-02 8.28e-02 3.04e-01 2.65e-01 3.74e-01 ph/cm2/s
Fluence Cutoff-PL 6.05e-07 1.12e-06 1.61e-06 4.48e-06 4.58e-06 7.82e-06 erg/cm2
Error 4.39e-08 5.23e-08 8.59e-08 8.40e-07 2.04e-07 9.91e-07 erg/cm2
Peak flux Cutoff-PL 1.38e+00 2.26e+00 2.31e+00 2.09e+00 7.01e+00 8.04e+00 ph/cm2/s
Error 1.50e-01 1.07e-01 1.09e-01 4.43e-01 2.72e-01 5.17e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.44e+00 2.25e+00 2.27e+00 2.35e+00 7.07e+00 8.31e+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 1.484 0.076 - - 1.65e-03 6.63e-05 52.990 57
CPL 1.443 0.182 712.7 0.0 1.73e-03 3.28e-04 53.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.039 0.060 - - 6.22e-02 2.24e-03 64.990 57
CPL 0.378 0.269 143.2 40.1 1.21e-01 3.26e-02 44.690 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: 246.016000 sec.
T50 in the 50-300 keV band: 209.920000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 291.532 -21.260 270.272
T90 243.912 -8.068 235.844
T50 213.368 0.668 214.036
Peak 1.000 2.644 3.644
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
127.2436 +58.1909 0.0039 31.1 -27.4 3.9297 49.5 TRIG_00609736
------------------------------------------
Foreground time interval of the image:
-21.260 12.141 (delta_t = 33.401 [sec])
Background time interval of the image:
-239.760 -21.260 (delta_t = 218.500 [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 -21.260 sec. to 270.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48444 ( -0.0760148 0.0759707 )
Norm@50keV : 1.65105E-03 ( -6.63711e-05 6.63193e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9297 for 57 degrees of freedom
# Null hypothesis probability = 6.261017e-01
Photon flux (15-150 keV) in 291.5 sec: 0.205265 ( -0.00880888 0.00884402 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57751e-06 ( -1.98564e-07 1.99454e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.260 sec. to 270.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44272 ( -0.291783 0.0728329 )
Epeak [keV] : 712.741 ( -9999.16 -9999.16 )
Norm@50keV : 1.72812E-03 ( -6.66032e-05 0.000589915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.05 using 59 PHA bins.
# Reduced chi-squared = 0.9473 for 56 degrees of freedom
# Null hypothesis probability = 5.871917e-01
Photon flux (15-150 keV) in 291.5 sec: 0.205187 ( -0.008599 0.008756 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.57725e-06 ( -2.08772e-07 1.98395e-07 ) ergs/cm2
Band function
Time interval is from -21.260 sec. to 270.272 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09003 ( 1.08878 1.08878 )
beta : -1.48663 ( 1.48663 0.0778189 )
Epeak [keV] : 49.9067 ( -49.5596 -49.5596 )
Norm@50keV : 3.41656E-03 ( -0.00186703 0.0767348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.97 using 59 PHA bins.
# Reduced chi-squared = 0.9631 for 55 degrees of freedom
# Null hypothesis probability = 5.525021e-01
Photon flux (15-150 keV) in 291.5 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] : 16.4960 ( )
R^2/D10^2 : 1.61349E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 207.42 using 59 PHA bins.
# Reduced chi-squared = 3.6389 for 57 degrees of freedom
# Null hypothesis probability = 5.857542e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.627e-07 2.086e-08
25- 50 1.134e-06 6.602e-08
50-150 2.182e-06 1.676e-07
15-150 3.579e-06 1.734e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.837250 (-0.033963 0.0339661)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.10 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.641434e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.109e-07 2.594e-08
25- 50 1.175e-06 5.320e-08
50-150 2.577e-06 1.131e-07
15-150 4.363e-06 2.026e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.79028 (-0.982189 1.10346)
R1^2/D10^2 : 0.235301 (-0.0957281 0.184415)
kT2 [keV] : 27.8419 (-3.48595 5.07167)
R2^2/D10^2 : 2.21804E-03 (-0.000967809 0.00135462)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.02 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Null hypothesis probability = 3.645171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.737e-07 8.118e-08
25- 50 1.124e-06 1.138e-07
50-150 2.845e-06 3.666e-07
15-150 4.543e-06 4.853e-07
Peak spectrum fit
Power-law model
Time interval is from 2.644 sec. to 3.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03881 ( -0.06046 0.0601337 )
Norm@50keV : 6.22375E-02 ( -0.00224175 0.0022402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.99 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.184545e-01
Photon flux (15-150 keV) in 1 sec: 7.18241 ( -0.264502 0.264734 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.63989e-07 ( -2.57366e-08 2.57686e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.644 sec. to 3.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.378143 ( -0.277624 0.261226 )
Epeak [keV] : 143.241 ( -25.8758 54.2772 )
Norm@50keV : 0.121435 ( -0.0274657 0.0377513 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.69 using 59 PHA bins.
# Reduced chi-squared = 0.7980 for 56 degrees of freedom
# Null hypothesis probability = 8.614424e-01
Photon flux (15-150 keV) in 1 sec: 7.01377 ( -0.27169 0.27192 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.49082e-07 ( -2.7169e-08 2.703e-08 ) ergs/cm2
Band function
Time interval is from 2.644 sec. to 3.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.378098 ( -0.201881 0.328145 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 143.219 ( -18.6796 54.15 )
Norm@50keV : 0.121441 ( -0.0275079 0.037764 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.69 using 59 PHA bins.
# Reduced chi-squared = 0.8125 for 55 degrees of freedom
# Null hypothesis probability = 8.384186e-01
Photon flux (15-150 keV) in 1 sec: 7.06576 ( ) 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] : 21.5394 ( )
R^2/D10^2 : 0.279789 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 123.87 using 59 PHA bins.
# Reduced chi-squared = 2.1732 for 57 degrees of freedom
# Null hypothesis probability = 7.366019e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.425e-08 1.680e-09
25- 50 1.266e-07 6.350e-09
50-150 4.386e-07 2.520e-08
15-150 5.895e-07 2.790e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 29.3311 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 249.10 using 59 PHA bins.
# Reduced chi-squared = 4.3702 for 57 degrees of freedom
# Null hypothesis probability = 7.570443e-26
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.304e-08 2.945e-09
25- 50 1.405e-07 5.700e-09
50-150 3.081e-07 1.195e-08
15-150 5.217e-07 1.995e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.27781 (-1.88099 2.15602)
R1^2/D10^2 : 1.81970 (-0.73911 1.62744)
kT2 [keV] : 31.4981 (-3.9648 6.7782)
R2^2/D10^2 : 6.88364E-02 (-0.0341091 0.0429022)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.93 using 59 PHA bins.
# Reduced chi-squared = 0.8169 for 55 degrees of freedom
# Null hypothesis probability = 8.318127e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.132e-08 6.930e-09
25- 50 1.341e-07 1.715e-08
50-150 4.764e-07 6.590e-08
15-150 6.518e-07 8.230e-08
Plot creation:
Sun Aug 17 20:23:45 EDT 2014