batgrbproduct Analysis for Trigger=586363
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 Feb 12 08:16:06 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger586363/GCN5_download_cron
======================================================================
Trigger: 00586363 Segment: 000
BAT Trigger Time: 413850300.736 [s; MET]
Trigger Stop: 413850301.76 [s; MET]
UTC: 2014-02-11T22:24:49.102520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.182552885277 Dec: -28.7436872428809 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.99
Image Trigger?: NO
Rate S/N Ratio: 13.3790881602597 [ if not an image trigger ]
Image S/N Ratio: 9.99
Flight Position: [ source = BAT ]
RA: 266.182552885277 Dec: -28.7436872428809 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.131830135367 Dec: -28.7518676630476 [deg; J2000]
{ 17h 44m 31.6s , -28d 45' 06.7" }
+/- 1.5979369675617 [arcmin] (estimated 90% radius based on SNR)
+/- 0.685593551966533 [arcmin] (formal 1-sigma fit error)
SNR: 15.5710854659827
Angular difference between Flight and Ground position is 2.713024 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 22.7799999713898 +/- 4.20990455626898
Measured from: -0.0879998803138733
to: 22.6920000910759 [s; relative to TRIGTIME]
T50: 10.9279999136925 +/- 3.32449392414614
Measured from: 2.09200012683868
to: 13.0200000405312 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.296000003814697
to: 1.2960000038147 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.84799998998642
to: 24.9959999918938 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.659701 0.383774 0.009685 0.012384
0.039076 0.035287 0.028593 0.024601 [error]
Peak 0.066761 0.047996 0.003005 -0.003264
0.008293 0.007188 0.005627 0.004784 [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 2.09e-07 1.40e-07 6.11e-08 3.68e-08 4.28e-07 4.46e-07 erg/cm2
Error 2.25e-08 1.81e-08 1.65e-08 1.76e-08 4.75e-08 5.47e-08 erg/cm2
Peak flux Power-law 5.97e-01 3.01e-01 9.33e-02 3.69e-02 1.01e+00 1.03e+00 ph/cm2/s
Error 1.19e-01 5.95e-02 3.42e-02 2.37e-02 1.77e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 2.03e-07 1.57e-07 8.66e-09 5.25e-12 3.68e-07 3.68e-07 erg/cm2
Error 2.54e-08 2.42e-08 1.10e-08 1.02e-10 3.88e-08 3.88e-08 erg/cm2
Peak flux Cutoff-PL 6.06e-01 3.90e-01 8.70e-03 3.68e-07 1.00e+00 1.00e+00 ph/cm2/s
Error 1.40e-01 9.21e-02 1.97e-02 1.00e-04 1.71e-01 1.28e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.195 0.239 - - 1.25e-03 2.56e-04 65.490 57
CPL 1.000 0.000 50.0 0.0 6.13e-03 0.00e+00 172.210 56
The chi2 of BB fit is 42.64 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.688 0.339 - - 4.57e-03 1.32e-03 58.410 57
CPL -4.501 -0.269 24.9 3.0 7.31e+02 0.00e+00 42.960 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 25.844 -0.848 24.996
T90 22.780 -0.088 22.692
T50 10.928 2.092 13.020
Peak 1.000 0.296 1.296
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.1318 -28.7519 0.0124 16.4 25.2 0.9454 15.6 TRIG_00586363
------------------------------------------
Foreground time interval of the image:
-0.848 17.765 (delta_t = 18.613 [sec])
Background time interval of the image:
-119.736 -0.848 (delta_t = 118.888 [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 -0.848 sec. to 24.996 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.19523 ( -0.230175 0.248667 )
Norm@50keV : 1.25154E-03 ( -0.000249326 0.000262984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.49 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.058311e-01
Photon flux (15-150 keV) in 25.84 sec: 0.398103 ( -0.0379365 0.0379364 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.27797e-07 ( -4.6774e-08 4.81306e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.848 sec. to 24.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.12914E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 172.21 using 59 PHA bins.
# Reduced chi-squared = 3.0752 for 56 degrees of freedom
# Null hypothesis probability = 9.408989e-14
Photon flux (15-150 keV) in 25.84 sec: 0.376796 ( -0.03801 0.038161 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.68065e-07 ( -3.81528e-08 3.95455e-08 ) ergs/cm2
Band function
Time interval is from -0.848 sec. to 24.996 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43099 ( )
beta : -8.85729 ( )
Epeak [keV] : 33.1128 ( )
Norm@50keV : 5.23000E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.57 using 59 PHA bins.
# Reduced chi-squared = 2.4103 for 55 degrees of freedom
# Null hypothesis probability = 2.379018e-08
Photon flux (15-150 keV) in 25.84 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] : 5.36067 (-0.435771 0.470521)
R^2/D10^2 : 2.46441 (-0.817371 1.24909)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.64 using 59 PHA bins.
# Reduced chi-squared = 0.7481 for 57 degrees of freedom
# Null hypothesis probability = 9.212787e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.030e-07 2.646e-08
25- 50 1.568e-07 2.366e-08
50-150 8.837e-09 4.010e-09
15-150 3.687e-07 5.052e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.8352 (-2.5212 3.00577)
Norm : 6.61291 (-1.50789 1.99473)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.60 using 59 PHA bins.
# Reduced chi-squared = 0.8701 for 57 degrees of freedom
# Null hypothesis probability = 7.462971e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.112e-07 2.815e-08
25- 50 1.516e-07 2.348e-08
50-150 2.975e-08 1.256e-08
15-150 3.925e-07 4.470e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00242 (-5.36261 191.296)
R1^2/D10^2 : 3.18357E+04 ( )
kT2 [keV] : 5.40423 (-0.471433 0.443307)
R2^2/D10^2 : 2.35641 (-2.35627 1.32576)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.64 using 59 PHA bins.
#Fit statistic : Chi-Squared = 42.54 using 59 PHA bins.
# Reduced chi-squared = 0.7753 for 55 degrees of freedom
# Reduced chi-squared = 0.7734 for 55 degrees of freedom
# Null hypothesis probability = 8.878482e-01
# Null hypothesis probability = 8.901253e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.030e-07 5.397e-01
25- 50 1.570e-07 4.913e+00
50-150 8.860e-09 1.150e+02
15-150 3.688e-07 1.234e+02
Peak spectrum fit
Power-law model
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.68754 ( -0.321013 0.357678 )
Norm@50keV : 4.56960E-03 ( -0.00129395 0.00133846 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.231836e-01
Photon flux (15-150 keV) in 1 sec: 1.01147 ( -0.176705 0.176796 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83879e-08 ( -9.88891e-09 1.0362e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.50121 ( 3.37092 2.83295 )
Epeak [keV] : 24.8515 ( -3.01295 2.98145 )
Norm@50keV : 731.195 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.96 using 59 PHA bins.
# Reduced chi-squared = 0.7671 for 56 degrees of freedom
# Null hypothesis probability = 8.996365e-01
Photon flux (15-150 keV) in 1 sec: 1.00452 ( -0.17041 0.17061 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.9763e-08 ( -7.0827e-09 7.4737e-09 ) ergs/cm2
Band function
Time interval is from 0.296 sec. to 1.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99278 ( -3.91659 -4.99278 )
beta : -4.69570 ( 4.6957 1.40679 )
Epeak [keV] : 24.3230 ( -3.08665 2.74609 )
Norm@50keV : 1962.36 ( -314.845 3123.08 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.13 using 59 PHA bins.
# Reduced chi-squared = 0.7661 for 55 degrees of freedom
# Null hypothesis probability = 8.985022e-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] : 6.14791 (-0.794614 0.922667)
R^2/D10^2 : 3.70009 (-1.72495 3.14972)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.7775 for 57 degrees of freedom
# Null hypothesis probability = 8.898315e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.923e-08 6.372e-09
25- 50 2.021e-08 5.940e-09
50-150 2.043e-09 1.230e-09
15-150 4.148e-08 1.119e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.9593 (-6.03383 9.13354)
Norm : 10.9838 (-3.39564 4.99099)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.79 using 59 PHA bins.
# Reduced chi-squared = 0.8910 for 57 degrees of freedom
# Null hypothesis probability = 7.058830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.898e-08 4.415e-09
25- 50 1.838e-08 5.525e-09
50-150 6.876e-09 4.237e-09
15-150 4.423e-08 1.075e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.17263 (-6.17132 56.8521)
R1^2/D10^2 : 3.57910 (-3.5812 -3.5812)
kT2 [keV] : 5.84569 (-5.89234 -5.89234)
R2^2/D10^2 : 7.32821E-02 (-0.0864778 -0.0864778)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.32 using 59 PHA bins.
# Reduced chi-squared = 0.8058 for 55 degrees of freedom
# Null hypothesis probability = 8.480440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.917e-08 2.981e-03
25- 50 2.029e-08 2.705e-02
50-150 2.078e-09 6.510e-01
15-150 4.154e-08 6.185e-01
Plot creation:
Wed Feb 12 08:25:47 EST 2014