batgrbproduct Analysis for Trigger=594081
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): Mon Mar 31 17:11:02 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger594081/GCN5_download_cron
======================================================================
Trigger: 00594081 Segment: 000
BAT Trigger Time: 417937800 [s; MET]
Trigger Stop: 417938120 [s; MET]
UTC: 2014-03-31T05:49:48.173160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 134.844638913522 Dec: 2.7069009242252 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.74
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.74
Flight Position: [ source = BAT ]
RA: 134.844638913522 Dec: 2.7069009242252 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 134.859925511017 Dec: 2.75541430442498 [deg; J2000]
{ 08h 59m 26.4s , +02d 45' 19.5" }
+/- 3.17705222077677 [arcmin] (estimated 90% radius based on SNR)
+/- 1.64121496163227 [arcmin] (formal 1-sigma fit error)
SNR: 5.83365487687871
Angular difference between Flight and Ground position is 3.051575 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 209.551999926567 +/- 33.3105342810254
Measured from: 92.0280001163483
to: 301.580000042915 [s; relative to TRIGTIME]
T50: 41.7319999337196 +/- 61.3011214644215
Measured from: 161.540000140667
to: 203.272000074387 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 292.487999975681
to: 293.487999975681 [s; relative to TRIGTIME]
Total Fluence
Measured from: 87.283999979496
to: 321.139999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.549131 0.551002 0.283505 0.031897
0.073707 0.075391 0.065429 0.056340 [error]
Peak 0.015810 0.013367 0.007228 0.002922
0.004841 0.004916 0.004318 0.003602 [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 1.50e-07 2.02e-07 2.01e-07 3.62e-07 6.71e-07 9.15e-07 erg/cm2
Error 3.02e-08 3.24e-08 5.81e-08 2.02e-07 1.34e-07 2.72e-07 erg/cm2
Peak flux Power-law 1.09e-01 9.61e-02 5.83e-02 5.34e-02 2.86e-01 3.17e-01 ph/cm2/s
Error 6.46e-02 3.67e-02 4.70e-02 7.65e-02 1.09e-01 1.27e-01 ph/cm2/s
Fluence Cutoff-PL 9.22e-08 1.64e-07 1.53e-07 7.36e-08 4.59e-07 4.83e-07 erg/cm2
Error 2.81e-08 4.21e-08 7.33e-08 2.36e-07 1.45e-07 3.40e-07 erg/cm2
Peak flux Cutoff-PL 1.12e-01 9.62e-02 5.71e-02 1.47e-03 2.86e-01 3.15e-01 ph/cm2/s
Error 6.42e-02 3.66e-02 3.15e-03 1.09e-01 1.24e-01 0.00e+00 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 2.006 0.295 - - 3.12e-04 6.59e-05 66.160 57
CPL 1.247 1.510 36.1 0.0 9.43e-04 0.00e+00 65.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.722 0.832 - - 2.14e-03 1.00e-03 49.130 57
CPL 2.102 0.837 40.4 -0.0 1.29e-03 0.00e+00 48.840 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 233.856 87.284 321.140
T90 209.552 92.028 301.580
T50 41.732 161.540 203.272
Peak 1.000 292.488 293.488
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
134.8599 +2.7554 0.0332 9.1 48.2 1.4902 5.8 TRIG_00594081
------------------------------------------
Foreground time interval of the image:
87.284 281.140 (delta_t = 193.856 [sec])
282.000 321.140 (delta_t = 39.140 [sec])
Background time interval of the image:
-10.899 87.284 (delta_t = 98.183 [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
87.284000 281.140000
282.000000 321.140000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00579 ( -0.282276 0.306746 )
Norm@50keV : 3.12036E-04 ( -6.68059e-05 6.50883e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.16 using 59 PHA bins.
# Reduced chi-squared = 1.161 for 57 degrees of freedom
# Null hypothesis probability = 1.902068e-01
Photon flux (15-150 keV) in 233 sec: 4.69304E-02 ( -0.00724648 0.0072479 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70677e-07 ( -1.31155e-07 1.3757e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
87.284000 281.140000
282.000000 321.140000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24673 ( -2.15671 0.864116 )
Epeak [keV] : 36.1178 ( )
Norm@50keV : 9.43473E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.17 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 56 degrees of freedom
# Null hypothesis probability = 1.879983e-01
Photon flux (15-150 keV) in 233 sec: 4.57491E-02 ( -0.0074418 0.0075009 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59408e-07 ( -1.33859e-07 1.56732e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
87.284000 281.140000
282.000000 321.140000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.76766 ( -6.0111 -4.76766 )
beta : -2.44769 ( -0.65026 0.451453 )
Epeak [keV] : 24.9263 ( -4.52948 4.21623 )
Norm@50keV : 38.8018 ( -5.86682 375.632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.78 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.468249e-01
Photon flux (15-150 keV) in 233 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] : 8.08002 (-1.2946 1.6296)
R^2/D10^2 : 5.04602E-02 (-0.0259181 0.0499452)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.30 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.272362e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.398e-07 3.841e-08
25- 50 2.490e-07 6.798e-08
50-150 6.754e-08 3.420e-08
15-150 4.563e-07 1.142e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.9189 (-21.452 45.9052)
Norm : 0.253404 (-0.0598033 0.0817478)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.12 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.150475e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.471e-07 3.012e-08
25- 50 2.201e-07 4.475e-08
50-150 2.395e-07 1.176e-07
15-150 6.067e-07 1.646e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.45722 (-1.57369 1.73819)
R1^2/D10^2 : 0.102242 (-0.058238 0.168163)
kT2 [keV] : 27.3685 (-13.692 -27.3357)
R2^2/D10^2 : 2.89849E-04 (-0.000288598 0.00378603)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.67 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 55 degrees of freedom
# Null hypothesis probability = 2.498672e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.539e-07 8.296e-08
25- 50 2.192e-07 1.130e-07
50-150 2.909e-07 1.623e-07
15-150 6.641e-07 3.318e-07
Peak spectrum fit
Power-law model
Time interval is from 292.488 sec. to 293.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72203 ( -0.768626 0.896348 )
Norm@50keV : 2.13668E-03 ( -0.00106482 0.000943242 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8619 for 57 degrees of freedom
# Null hypothesis probability = 7.613686e-01
Photon flux (15-150 keV) in 1 sec: 0.285994 ( -0.1088 0.108816 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97501e-08 ( -9.2237e-09 9.96121e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 292.488 sec. to 293.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10177 ( -0.778777 0.894908 )
Epeak [keV] : 40.4187 ( -9999.34 -9999.35 )
Norm@50keV : 1.28768E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.84 using 59 PHA bins.
# Reduced chi-squared = 0.8721 for 56 degrees of freedom
# Null hypothesis probability = 7.403564e-01
Photon flux (15-150 keV) in 1 sec: 0.285940 ( -0.108884 0.108794 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97171e-09 ( -5.745e-10 6.7267e-10 ) ergs/cm2
Band function
Time interval is from 292.488 sec. to 293.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98786 ( -4.98786 -4.98786 )
beta : -1.76483 ( -1.19187 0.780183 )
Epeak [keV] : 20.1972 ( -20.1972 69.4425 )
Norm@50keV : 1058.73 ( -400.515 4.10541e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.93 using 59 PHA bins.
# Reduced chi-squared = 0.8897 for 55 degrees of freedom
# Null hypothesis probability = 7.043516e-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] : 10.1399 (-4.69919 11.7808)
R^2/D10^2 : 0.121321 (-0.119909 1.15504)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9184 for 57 degrees of freedom
# Null hypothesis probability = 6.499206e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.552e-09 1.612e-09
25- 50 6.470e-09 4.137e-09
50-150 3.515e-09 2.754e-09
15-150 1.254e-08 8.650e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 191.745 (-166.758 -166.758)
Norm : 1.14591 (-0.451337 1.18637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.55 using 59 PHA bins.
# Reduced chi-squared = 0.8694 for 57 degrees of freedom
# Null hypothesis probability = 7.476137e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.868e-09 1.760e-09
25- 50 5.491e-09 3.401e-09
50-150 1.189e-08 7.535e-09
15-150 2.025e-08 1.289e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31044 (-3.53943 7.53226)
R1^2/D10^2 : 1.14451 (-0.949638 194.692)
kT2 [keV] : 35.1949 (-29.8487 -37.0131)
R2^2/D10^2 : 1.46548E-03 (-0.00121117 0.0118953)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8907 for 55 degrees of freedom
# Null hypothesis probability = 7.022981e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.777e-09 2.472e-09
25- 50 4.337e-09 2.545e-09
50-150 1.370e-08 9.055e-09
15-150 2.181e-08 1.245e-08
Plot creation:
Mon Mar 31 17:29:50 EDT 2014