batgrbproduct Analysis for Trigger=610501
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 24 21:56:35 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger610501/GCN5_download_cron
======================================================================
Trigger: 00610501 Segment: 000
BAT Trigger Time: 430562440.512 [s; MET]
Trigger Stop: 430562441.536 [s; MET]
UTC: 2014-08-24T08:40:28.076080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 206.643863339572 Dec: 33.297259588135 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8
Image Trigger?: NO
Rate S/N Ratio: 14.456832294801 [ if not an image trigger ]
Image S/N Ratio: 8
Flight Position: [ source = BAT ]
RA: 206.643863339572 Dec: 33.297259588135 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 206.626469065674 Dec: 33.2847236503389 [deg; J2000]
{ 13h 46m 30.4s , +33d 17' 05.0" }
+/- 1.70286120178311 [arcmin] (estimated 90% radius based on SNR)
+/- 0.610552967568252 [arcmin] (formal 1-sigma fit error)
SNR: 14.2187791190053
Angular difference between Flight and Ground position is 1.151866 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 3.08799993991852 +/- 0.501597423728004
Measured from: 0.372000098228455
to: 3.46000003814697 [s; relative to TRIGTIME]
T50: 1.31599998474121 +/- 0.325779070171135
Measured from: 0.924000084400177
to: 2.24000006914139 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.339999973773956
to: 1.33999997377396 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.263999998569489
to: 3.63999998569489 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.127916 0.129814 0.061961 0.016427
0.012076 0.012559 0.010768 0.010047 [error]
Peak 0.045207 0.055761 0.027659 0.006231
0.006772 0.007019 0.006187 0.005470 [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 4.03e-08 5.53e-08 5.60e-08 1.03e-07 1.85e-07 2.55e-07 erg/cm2
Error 6.08e-09 5.93e-09 1.07e-08 3.89e-08 2.43e-08 5.05e-08 erg/cm2
Peak flux Power-law 4.90e-01 3.97e-01 2.18e-01 1.75e-01 1.18e+00 1.28e+00 ph/cm2/s
Error 1.02e-01 5.76e-02 5.07e-02 7.79e-02 1.72e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 4.04e-08 5.54e-08 5.60e-08 1.02e-07 1.85e-07 2.54e-07 erg/cm2
Error 6.08e-09 6.67e-09 1.16e-08 7.29e-08 2.82e-08 6.19e-08 erg/cm2
Peak flux Cutoff-PL 4.47e-01 4.48e-01 2.09e-01 4.55e-02 1.14e+00 1.15e+00 ph/cm2/s
Error 1.18e-01 8.65e-02 6.35e-02 1.00e-01 1.79e-01 2.08e-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 1.981 0.206 - - 5.94e-03 8.16e-04 53.920 57
CPL 1.984 0.821 300.2 -6.3 5.92e-03 1.07e-02 53.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.866 0.263 - - 8.37e-03 1.48e-03 57.940 57
CPL 0.805 1.507 45.9 -8.8 3.51e-02 1.94e-01 56.000 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 3.376 0.264 3.640
T90 3.088 0.372 3.460
T50 1.316 0.924 2.240
Peak 1.000 0.340 1.340
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
206.6265 +33.2847 0.0136 27.7 -137.6 0.3215 14.2 TRIG_00610501
------------------------------------------
Foreground time interval of the image:
0.264 3.640 (delta_t = 3.376 [sec])
Background time interval of the image:
-239.512 0.264 (delta_t = 239.776 [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 0.264 sec. to 3.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98130 ( -0.201521 0.21136 )
Norm@50keV : 5.94127E-03 ( -0.000825803 0.000805533 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.92 using 59 PHA bins.
# Reduced chi-squared = 0.9459 for 57 degrees of freedom
# Null hypothesis probability = 5.914990e-01
Photon flux (15-150 keV) in 3.376 sec: 0.883617 ( -0.0937997 0.0938069 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84802e-07 ( -2.40063e-08 2.4594e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.264 sec. to 3.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98395 ( -1.00978 0.631666 )
Epeak [keV] : 300.174 ( -9976.03 -9988.54 )
Norm@50keV : 5.92129E-03 ( -0.003071 0.0183102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.92 using 59 PHA bins.
# Reduced chi-squared = 0.9629 for 56 degrees of freedom
# Null hypothesis probability = 5.538921e-01
Photon flux (15-150 keV) in 3.376 sec: 0.883353 ( -0.047788 0.093734 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84723e-07 ( -3.20359e-08 2.4399e-08 ) ergs/cm2
Band function
Time interval is from 0.264 sec. to 3.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.89574 ( -3.43587 -3.43587 )
beta : -2.12056 ( -0.381955 0.27925 )
Epeak [keV] : 23.1466 ( -22.6537 132.611 )
Norm@50keV : 37.6147 ( -37.6003 786.216 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.50 using 59 PHA bins.
# Reduced chi-squared = 0.9545 for 55 degrees of freedom
# Null hypothesis probability = 5.708956e-01
Photon flux (15-150 keV) in 3.376 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] : 9.00130 (-1.07413 1.23984)
R^2/D10^2 : 0.609943 (-0.241525 0.392804)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.09 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.932777e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.249e-08 5.771e-09
25- 50 6.906e-08 9.166e-09
50-150 2.636e-08 8.221e-09
15-150 1.279e-07 2.115e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.5943 (-19.2571 34.0546)
Norm : 4.46818 (-0.769119 0.936756)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9685 for 57 degrees of freedom
# Null hypothesis probability = 5.427579e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.833e-08 5.354e-09
25- 50 5.963e-08 7.377e-09
50-150 7.202e-08 2.093e-08
15-150 1.700e-07 2.551e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.46804 (-1.46047 1.27985)
R1^2/D10^2 : 1.14197 (-0.223572 1.26893)
kT2 [keV] : 72.4259 (-51.0668 -74.4312)
R2^2/D10^2 : 4.68890E-04 (-0.000381932 0.0098716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.50 using 59 PHA bins.
# Reduced chi-squared = 0.9182 for 55 degrees of freedom
# Null hypothesis probability = 6.470545e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.743e-08 8.980e-09
25- 50 6.208e-08 1.440e-08
50-150 9.720e-08 4.985e-08
15-150 1.967e-07 6.787e-08
Peak spectrum fit
Power-law model
Time interval is from 0.340 sec. to 1.340 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86592 ( -0.254925 0.271728 )
Norm@50keV : 8.36557E-03 ( -0.00150398 0.00146289 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.405029e-01
Photon flux (15-150 keV) in 1 sec: 1.18355 ( -0.171759 0.171775 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.69074e-08 ( -1.34689e-08 1.38798e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.340 sec. to 1.340 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.804713 ( -1.75427 1.25902 )
Epeak [keV] : 45.8634 ( -28.3444 -45.8573 )
Norm@50keV : 3.50563E-02 ( -0.0351015 0.353374 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 56 degrees of freedom
# Null hypothesis probability = 4.746789e-01
Photon flux (15-150 keV) in 1 sec: 1.14083 ( -0.178678 0.17942 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.86465e-08 ( -1.44153e-08 1.68895e-08 ) ergs/cm2
Band function
Time interval is from 0.340 sec. to 1.340 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.464255 ( 0.731899 0.731899 )
beta : -2.63433 ( 2.67183 0.91274 )
Epeak [keV] : 42.4715 ( -43.9992 29.8808 )
Norm@50keV : 5.78988E-02 ( -0.0363054 355.246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.516814e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05542e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.4171 (-1.53201 1.82037)
R^2/D10^2 : 0.491369 (-0.225178 0.404448)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.48 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 57 degrees of freedom
# Null hypothesis probability = 3.513483e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.100e-08 2.901e-09
25- 50 2.894e-08 6.165e-09
50-150 1.698e-08 6.539e-09
15-150 5.691e-08 1.170e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.6360 (-29.3413 67.1654)
Norm : 5.63374 (-1.074 1.41237)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.34 using 59 PHA bins.
# Reduced chi-squared = 0.9884 for 57 degrees of freedom
# Null hypothesis probability = 4.998680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.460e-08 2.930e-09
25- 50 2.394e-08 4.200e-09
50-150 3.340e-08 1.929e-08
15-150 7.194e-08 2.320e-08
Double BB
R1^2/D10^2 : 1.36560E-03 ( )
kT2 [keV] : 8.80710 (-3.01903 2.19137)
R2^2/D10^2 : 0.816073 (-0.440539 -0.803114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.56 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.44 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.42 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Reduced chi-squared = 1.026 for 55 degrees of freedom
# Reduced chi-squared = 1.026 for 55 degrees of freedom
# Null hypothesis probability = 4.166701e-01
# Null hypothesis probability = 4.209687e-01
# Null hypothesis probability = 4.215359e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.370e-08 7.525e-09
25- 50 2.545e-08 1.291e-08
50-150 2.677e-08 1.510e-08
15-150 6.593e-08 3.369e-08
Plot creation:
Sun Aug 24 22:00:08 EDT 2014