batgrbproduct Analysis for Trigger=652334
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): Tue Aug 18 07:08:27 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger652334/GCN5_download_cron
======================================================================
Trigger: 00652334 Segment: 000
BAT Trigger Time: 461469928.384 [s; MET]
Trigger Stop: 461469928.64 [s; MET]
UTC: 2015-08-17T02:05:13.380040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 249.643455724632 Dec: -12.065631269064 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.83
Image Trigger?: NO
Rate S/N Ratio: 26.2678510731274 [ if not an image trigger ]
Image S/N Ratio: 10.83
Flight Position: [ source = BAT ]
RA: 249.643455724632 Dec: -12.065631269064 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 249.63459272104 Dec: -12.0504892183331 [deg; J2000]
{ 16h 38m 32.3s , -12d 03' 01.8" }
+/- 0.753658258132231 [arcmin] (estimated 90% radius based on SNR)
+/- 0.222972769703162 [arcmin] (formal 1-sigma fit error)
SNR: 45.5599704703528
Angular difference between Flight and Ground position is 1.046835 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 45.1399999856949 +/- 199.680663010251
Measured from: -5.71599990129471
to: 39.4240000844002 [s; relative to TRIGTIME]
T50: 19.0079998970032 +/- 4.25859506033178
Measured from: 3.7480001449585
to: 22.7560000419617 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.216000020504
to: 12.216000020504 [s; relative to TRIGTIME]
Total Fluence
Measured from: -16.7639999985695
to: 308.768000006676 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.678900 4.343294 2.433848 0.485000
0.123447 0.118753 0.098318 0.092813 [error]
Peak 0.220290 0.402941 0.458024 0.152760
0.011020 0.013018 0.013682 0.009560 [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 1.19e-06 1.76e-06 1.95e-06 4.06e-06 6.13e-06 8.96e-06 erg/cm2
Error 7.48e-08 6.47e-08 1.02e-07 4.58e-07 2.35e-07 5.34e-07 erg/cm2
Peak flux Power-law 2.02e+00 2.84e+00 2.96e+00 5.68e+00 9.62e+00 1.35e+01 ph/cm2/s
Error 1.49e-01 1.25e-01 1.08e-01 4.63e-01 3.34e-01 5.17e-01 ph/cm2/s
Fluence Cutoff-PL 1.13e-06 1.81e-06 1.96e-06 2.44e-06 5.94e-06 7.34e-06 erg/cm2
Error 9.02e-08 7.75e-08 1.06e-07 1.04e-06 2.84e-07 1.09e-06 erg/cm2
Peak flux Cutoff-PL 1.96e+00 2.85e+00 3.00e+00 5.18e+00 9.58e+00 1.30e+01 ph/cm2/s
Error 1.92e-01 1.28e-01 1.37e-01 1.05e+00 3.41e-01 9.87e-01 ph/cm2/s
Fluence Band 1.05e-06 1.85e-06 1.90e-06 3.50e-06 5.94e-06 8.33e-06 erg/cm2
Error 1.04e-07 8.72e-08 1.08e-07 5.91e-07 2.59e-07 -------- 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 1.854 0.070 - - 2.05e-03 7.78e-05 44.050 57
CPL 1.529 0.284 68.5 56.2 3.02e-03 1.03e-03 39.900 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.939 0.061 - - 8.37e-02 2.88e-03 43.360 57
CPL 0.846 0.180 745.9 0.0 9.17e-02 1.41e-02 42.890 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: 33.024000 sec.
T50 in the 50-300 keV band: 14.144000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 325.532 -16.764 308.768
T90 45.140 -5.716 39.424
T50 19.008 3.748 22.756
Peak 1.000 11.216 12.216
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
249.6346 -12.0505 0.0042 21.7 -103.0 3.5811 45.6 TRIG_00652334
------------------------------------------
Foreground time interval of the image:
-16.764 8.217 (delta_t = 24.981 [sec])
Background time interval of the image:
-154.383 -16.764 (delta_t = 137.619 [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 -16.764 sec. to 308.768 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85408 ( -0.0694333 0.0699494 )
Norm@50keV : 2.04837E-03 ( -7.79674e-05 7.76472e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.05 using 59 PHA bins.
# Reduced chi-squared = 0.7727 for 57 degrees of freedom
# Null hypothesis probability = 8.954408e-01
Photon flux (15-150 keV) in 325.5 sec: 0.288398 ( -0.0110299 0.0110654 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.13027e-06 ( -2.34255e-07 2.35097e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -16.764 sec. to 308.768 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52877 ( -0.294356 0.274545 )
Epeak [keV] : 68.5338 ( -13.7757 98.5837 )
Norm@50keV : 3.01921E-03 ( -0.000823641 0.0012426 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.90 using 59 PHA bins.
# Reduced chi-squared = 0.7126 for 56 degrees of freedom
# Null hypothesis probability = 9.487271e-01
Photon flux (15-150 keV) in 325.5 sec: 0.281723 ( -0.012259 0.012292 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93728e-06 ( -2.83934e-07 2.84227e-07 ) ergs/cm2
Band function
Time interval is from -16.764 sec. to 308.768 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.73114E-02 ( -0.751908 0.736156 )
beta : -1.98038 ( -0.168318 0.125962 )
Epeak [keV] : 34.2192 ( -15.4204 21.0983 )
Norm@50keV : 2.86148E-02 ( -0.0284837 120.032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.93 using 59 PHA bins.
# Reduced chi-squared = 0.6532 for 55 degrees of freedom
# Null hypothesis probability = 9.782808e-01
Photon flux (15-150 keV) in 325.5 sec: 0.277159 ( 6.72284 -0.012872 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94164e-06 ( -5.93937e-06 -2.57861e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1106 ( )
R^2/D10^2 : 6.27354E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 197.79 using 59 PHA bins.
# Reduced chi-squared = 3.4701 for 57 degrees of freedom
# Null hypothesis probability = 1.984462e-17
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.339e-07 4.069e-08
25- 50 2.017e-06 8.496e-08
50-150 1.789e-06 1.553e-07
15-150 4.439e-06 1.888e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 95.7450 (-12.3837 15.6355)
Norm : 1.26094 (-0.071949 0.0782097)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.39 using 59 PHA bins.
# Reduced chi-squared = 0.7261 for 57 degrees of freedom
# Null hypothesis probability = 9.403979e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.072e-06 8.072e-08
25- 50 1.838e-06 8.089e-08
50-150 2.905e-06 7.649e-07
15-150 5.815e-06 7.584e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.99160 (-0.733782 0.759915)
R1^2/D10^2 : 0.356693 (-0.106671 0.171619)
kT2 [keV] : 24.6615 (-3.36607 4.75502)
R2^2/D10^2 : 3.19100E-03 (-0.00151871 0.00244243)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.66 using 59 PHA bins.
# Reduced chi-squared = 0.6666 for 55 degrees of freedom
# Null hypothesis probability = 9.729914e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.021e-06 1.125e-07
25- 50 1.867e-06 1.571e-07
50-150 3.019e-06 5.241e-07
15-150 5.907e-06 7.552e-07
Peak spectrum fit
Power-law model
Time interval is from 11.216 sec. to 12.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.939478 ( -0.0616911 0.0612902 )
Norm@50keV : 8.37242E-02 ( -0.00287945 0.0028716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.36 using 59 PHA bins.
# Reduced chi-squared = 0.7608 for 57 degrees of freedom
# Null hypothesis probability = 9.086307e-01
Photon flux (15-150 keV) in 1 sec: 9.61626 ( -0.333585 0.333738 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.25563e-07 ( -3.42224e-08 3.42803e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.216 sec. to 12.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846314 ( -0.240969 0.118513 )
Epeak [keV] : 745.876 ( -745.876 -745.876 )
Norm@50keV : 9.17228E-02 ( -0.00460098 0.0235891 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.89 using 59 PHA bins.
# Reduced chi-squared = 0.7659 for 56 degrees of freedom
# Null hypothesis probability = 9.008785e-01
Photon flux (15-150 keV) in 1 sec: 9.57743 ( -0.34584 0.3363 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.22979e-07 ( -3.5308e-08 3.5001e-08 ) ergs/cm2
Band function
Time interval is from 11.216 sec. to 12.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.814252 ( 0.814252 0.814252 )
beta : -0.939477 ( -0.0612856 0.0617025 )
Epeak [keV] : 40.2783 ( )
Norm@50keV : 0.129197 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.36 using 59 PHA bins.
# Reduced chi-squared = 0.7884 for 55 degrees of freedom
# Null hypothesis probability = 8.716759e-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] : 23.9111 ( )
R^2/D10^2 : 0.269674 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 188.07 using 59 PHA bins.
# Reduced chi-squared = 3.2995 for 57 degrees of freedom
# Null hypothesis probability = 6.539200e-16
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 1.885e-09
25- 50 1.519e-07 7.900e-09
50-150 6.473e-07 3.170e-08
15-150 8.267e-07 3.705e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 38.7920 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 310.80 using 59 PHA bins.
# Reduced chi-squared = 5.4527 for 57 degrees of freedom
# Null hypothesis probability = 1.259611e-36
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.659e-08 3.375e-09
25- 50 1.858e-07 6.650e-09
50-150 4.075e-07 1.390e-08
15-150 6.899e-07 2.650e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.69079 (-1.30836 1.50389)
R1^2/D10^2 : 3.25970 (-1.20599 2.16759)
kT2 [keV] : 38.3937 (-4.69701 7.2533)
R2^2/D10^2 : 5.62637E-02 (-0.0225031 0.0279808)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.00 using 59 PHA bins.
# Reduced chi-squared = 0.7818 for 55 degrees of freedom
# Null hypothesis probability = 8.799759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.804e-08 8.635e-09
25- 50 1.688e-07 1.745e-08
50-150 7.063e-07 7.435e-08
15-150 9.331e-07 8.260e-08
Plot creation:
Tue Aug 18 07:22:54 EDT 2015