batgrbproduct Analysis for Trigger=583861
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 Jan 15 01:58:55 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger583861/GCN5_download_cron
======================================================================
Trigger: 00583861 Segment: 000
BAT Trigger Time: 411393472 [s; MET]
Trigger Stop: 411393536 [s; MET]
UTC: 2014-01-14T11:57:40.482160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 188.482555589256 Dec: 27.9264396826658 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.96
Flight Position: [ source = BAT ]
RA: 188.482555589256 Dec: 27.9264396826658 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 188.497838352254 Dec: 27.9427346240143 [deg; J2000]
{ 12h 33m 59.5s , +27d 56' 33.8" }
+/- 1.89509061411586 [arcmin] (estimated 90% radius based on SNR)
+/- 0.83739794383548 [arcmin] (formal 1-sigma fit error)
SNR: 12.2040540353743
Angular difference between Flight and Ground position is 1.269721 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 139.699999928474 +/- 16.5221713749102
Measured from: 44.5960001349449
to: 184.296000063419 [s; relative to TRIGTIME]
T50: 52.3359999060631 +/- 2.97106375812777
Measured from: 87.3920001387596
to: 139.728000044823 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 115.879999995232
to: 116.879999995232 [s; relative to TRIGTIME]
Total Fluence
Measured from: 24.255999982357
to: 202.519999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.528032 2.468077 1.153391 0.228242
0.076002 0.078372 0.067697 0.057705 [error]
Peak 0.045310 0.045466 0.017875 0.006809
0.006175 0.006537 0.005502 0.004525 [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 7.40e-07 9.66e-07 9.24e-07 1.57e-06 3.15e-06 4.20e-06 erg/cm2
Error 5.12e-08 4.02e-08 6.61e-08 2.34e-07 1.47e-07 2.93e-07 erg/cm2
Peak flux Power-law 4.22e-01 3.07e-01 1.48e-01 1.01e-01 9.25e-01 9.78e-01 ph/cm2/s
Error 8.64e-02 4.91e-02 4.26e-02 5.40e-02 1.44e-01 1.57e-01 ph/cm2/s
Fluence Cutoff-PL 7.16e-07 9.88e-07 9.18e-07 1.03e-06 3.07e-06 3.65e-06 erg/cm2
Error 6.11e-08 5.01e-08 6.97e-08 5.59e-07 1.87e-07 5.87e-07 erg/cm2
Peak flux Cutoff-PL 4.13e-01 3.24e-01 1.44e-01 5.10e-02 9.14e-01 9.32e-01 ph/cm2/s
Error 9.13e-02 6.77e-02 5.16e-02 8.50e-02 1.47e-01 1.75e-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 2.064 0.088 - - 1.95e-03 9.76e-05 51.700 57
CPL 1.822 0.320 32.5 24.2 2.64e-03 1.21e-03 50.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.051 0.301 - - 6.02e-03 1.31e-03 45.700 57
CPL 1.626 1.228 33.7 0.0 1.10e-02 0.00e+00 45.350 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: 128.704000 sec.
T50 in the 50-300 keV band: 53.696000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 178.264 24.256 202.520
T90 139.700 44.596 184.296
T50 52.336 87.392 139.728
Peak 1.000 115.880 116.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
188.4978 +27.9427 0.0158 6.9 -168.1 0.9258 12.2 TRIG_00583861
------------------------------------------
Foreground time interval of the image:
24.256 28.951 (delta_t = 4.695 [sec])
30.000 49.670 (delta_t = 19.670 [sec])
51.000 72.001 (delta_t = 21.001 [sec])
Background time interval of the image:
-239.000 -197.470 (delta_t = 41.530 [sec])
-196.000 24.256 (delta_t = 220.256 [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
Multiple GTIs in the spectrum
tstart tstop
24.256000 28.951300
30.000000 49.670000
51.000000 148.820000
150.000000 202.520000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06371 ( -0.086977 0.0885666 )
Norm@50keV : 1.94838E-03 ( -9.8092e-05 9.71585e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.70 using 59 PHA bins.
# Reduced chi-squared = 0.9070 for 57 degrees of freedom
# Null hypothesis probability = 6.734957e-01
Photon flux (15-150 keV) in 174.7 sec: 0.301154 ( -0.013203 0.0132417 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.15234e-06 ( -1.46071e-07 1.47129e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
24.256000 28.951300
30.000000 49.670000
51.000000 148.820000
150.000000 202.520000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82182 ( -0.370985 0.26849 )
Epeak [keV] : 32.4679 ( -28.4385 19.9592 )
Norm@50keV : 2.63958E-03 ( -0.00089068 0.0015377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.26 using 59 PHA bins.
# Reduced chi-squared = 0.8974 for 56 degrees of freedom
# Null hypothesis probability = 6.910418e-01
Photon flux (15-150 keV) in 174.7 sec: 0.295962 ( -0.014965 0.014991 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.06854e-06 ( -1.86213e-07 1.87488e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
24.256000 28.951300
30.000000 49.670000
51.000000 148.820000
150.000000 202.520000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.65398 ( 1.65398 1.65398 )
beta : -2.21367 ( 2.21367 0.204729 )
Epeak [keV] : 33.1165 ( -33.1165 15.0099 )
Norm@50keV : 3.37174E-03 ( -0.00105946 407.938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.83 using 59 PHA bins.
# Reduced chi-squared = 0.9061 for 55 degrees of freedom
# Null hypothesis probability = 6.717853e-01
Photon flux (15-150 keV) in 174.7 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] : 10.4182 ( )
R^2/D10^2 : 0.110350 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 165.91 using 59 PHA bins.
# Reduced chi-squared = 2.9106 for 57 degrees of freedom
# Null hypothesis probability = 1.426981e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.316e-07 3.520e-08
25- 50 1.136e-06 5.381e-08
50-150 6.666e-07 7.556e-08
15-150 2.234e-06 1.109e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.6797 (-8.41091 10.4413)
Norm : 1.48082 (-0.115154 0.128027)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.05 using 59 PHA bins.
# Reduced chi-squared = 0.9658 for 57 degrees of freedom
# Null hypothesis probability = 5.485612e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.574e-07 4.053e-08
25- 50 1.023e-06 4.158e-08
50-150 1.237e-06 1.333e-07
15-150 2.918e-06 1.424e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.44035 (-0.7811 0.884604)
R1^2/D10^2 : 0.991614 (-0.425379 0.866649)
kT2 [keV] : 18.3387 (-2.5098 3.69975)
R2^2/D10^2 : 9.25899E-03 (-0.00484687 0.00783604)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.594089e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.919e-07 1.033e-07
25- 50 9.744e-07 1.108e-07
50-150 1.273e-06 2.489e-07
15-150 2.939e-06 3.905e-07
Peak spectrum fit
Power-law model
Time interval is from 115.880 sec. to 116.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05086 ( -0.285874 0.315925 )
Norm@50keV : 6.01902E-03 ( -0.00133574 0.0012911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.70 using 59 PHA bins.
# Reduced chi-squared = 0.8018 for 57 degrees of freedom
# Null hypothesis probability = 8.585304e-01
Photon flux (15-150 keV) in 1 sec: 0.924625 ( -0.143862 0.143889 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.56875e-08 ( -1.10568e-08 1.15186e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 115.880 sec. to 116.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62624 ( -1.64066 0.816095 )
Epeak [keV] : 33.6623 ( )
Norm@50keV : 1.10127E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8098 for 56 degrees of freedom
# Null hypothesis probability = 8.447762e-01
Photon flux (15-150 keV) in 1 sec: 0.914271 ( -0.146458 0.146649 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.28538e-08 ( -1.27587e-08 1.35815e-08 ) ergs/cm2
Band function
Time interval is from 115.880 sec. to 116.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95747 ( -4.95747 -4.95747 )
beta : -2.19122 ( -0.469429 0.343315 )
Epeak [keV] : 20.7595 ( -20.7595 5.07548 )
Norm@50keV : 3340.29 ( -515.901 9.79852e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.8123 for 55 degrees of freedom
# Null hypothesis probability = 8.386085e-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] : 8.53756 (-1.47501 1.7857)
R^2/D10^2 : 0.799531 (-0.416816 0.869106)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.70 using 59 PHA bins.
# Reduced chi-squared = 0.9245 for 57 degrees of freedom
# Null hypothesis probability = 6.371152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-08 3.471e-09
25- 50 2.151e-08 5.460e-09
50-150 6.965e-09 3.308e-09
15-150 3.949e-08 9.975e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.1232 (-21.0358 43.5306)
Norm : 5.03276 (-1.19675 1.63061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.48 using 59 PHA bins.
# Reduced chi-squared = 0.7978 for 57 degrees of freedom
# Null hypothesis probability = 8.640081e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.250e-08 2.783e-09
25- 50 1.863e-08 3.660e-09
50-150 2.003e-08 9.805e-09
15-150 5.116e-08 1.267e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.88221 (-2.90654 2.58811)
R1^2/D10^2 : 2.60947 (-1.83562 30.6293)
kT2 [keV] : 20.6720 (-17.8421 -20.8286)
R2^2/D10^2 : 1.63088E-02 (-0.0155484 0.0422382)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.41 using 59 PHA bins.
# Reduced chi-squared = 0.8256 for 55 degrees of freedom
# Null hypothesis probability = 8.183945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.298e-08 7.425e-09
25- 50 1.787e-08 9.390e-09
50-150 2.239e-08 1.482e-08
15-150 5.324e-08 2.920e-08
Plot creation:
Wed Jan 15 02:22:23 EST 2014