batgrbproduct Analysis for Trigger=605700
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 Jul 20 21:38:29 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/trigger605700
======================================================================
Trigger: 00605700 Segment: 000
BAT Trigger Time: 427495787.968 [s; MET]
Trigger Stop: 427495796.16 [s; MET]
UTC: 2014-07-19T20:49:35.681860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 39.7382664338233 Dec: -2.37796842981903 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.91
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 10.91
Flight Position: [ source = BAT ]
RA: 39.7382664338233 Dec: -2.37796842981903 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 39.7308622511569 Dec: -2.38430799470981 [deg; J2000]
{ 02h 38m 55.4s , -02d 23' 03.5" }
+/- 1.66674923640175 [arcmin] (estimated 90% radius based on SNR)
+/- 0.80814915062591 [arcmin] (formal 1-sigma fit error)
SNR: 14.6609076733293
Angular difference between Flight and Ground position is 0.584553 arcmin
Partial Coding Fraction: 0.4257812 [ including projection effects ]
Duration
T90: 53 +/- 13.4629120178363
Measured from: -12.9679999947548
to: 40.0320000052452 [s; relative to TRIGTIME]
T50: 17 +/- 5.8309518948453
Measured from: -2.96799999475479
to: 14.0320000052452 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -4.96799999475479
to: -3.96799999475479 [s; relative to TRIGTIME]
Total Fluence
Measured from: -16.9679999947548
to: 49.0320000052452 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.583706 0.781805 0.511492 0.046326
0.070482 0.070508 0.061307 0.051354 [error]
Peak 0.026383 0.023898 0.026446 0.007507
0.008533 0.008785 0.007698 0.006581 [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 2.20e-07 3.47e-07 4.12e-07 9.50e-07 1.26e-06 1.93e-06 erg/cm2
Error 3.58e-08 3.65e-08 5.99e-08 2.82e-07 1.44e-07 3.38e-07 erg/cm2
Peak flux Power-law 1.91e-01 2.30e-01 2.01e-01 3.00e-01 7.27e-01 9.22e-01 ph/cm2/s
Error 1.23e-01 8.91e-02 6.08e-02 2.17e-01 2.30e-01 2.61e-01 ph/cm2/s
Fluence Cutoff-PL 2.00e-07 3.78e-07 4.23e-07 1.19e-06 0.00e+00 0.00e+00 erg/cm2
Error 4.17e-08 4.89e-08 6.74e-08 1.58e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.00e-01 7.36e-01 9.24e-01 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.31e-01 2.58e-01 0.00e+00 0.00e+00 0.00e+00 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 1.753 0.176 - - 2.06e-03 2.29e-04 62.790 57
CPL 1.012 0.825 62.5 345.2 5.12e-03 6.62e-03 59.950 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 1.197 0.573 - - 6.20e-03 1.81e-03 57.740 57
CPL 1.213 0.642 9999.4 0.0 6.24e-03 7.66e-03 57.750 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: 29.376000 sec.
T50 in the 50-300 keV band: 13.696000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 66.000 -16.968 49.032
T90 53.000 -12.968 40.032
T50 17.000 -2.968 14.032
Peak 1.000 -4.968 -3.968
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
39.7309 -2.3843 0.0131 43.6721 -31.5651 2.1961791 14.661 TRIG_00605700
Foreground time interval of the image:
-16.968 49.032 (delta_t = 66.000 [sec])
Background time interval of the image:
-522.867 -506.088 (delta_t = 16.779 [sec])
-239.968 -19.510 (delta_t = 220.458 [sec])
-17.968 -16.968 (delta_t = 1.000 [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 -16.968 sec. to 49.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75278 ( -0.174173 0.178663 )
Norm@50keV : 2.06259E-03 ( -0.00022997 0.000227502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.79 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 57 degrees of freedom
# Null hypothesis probability = 2.785652e-01
Photon flux (15-150 keV) in 66 sec: 0.279183 ( -0.0296551 0.0297085 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25594e-06 ( -1.43423e-07 1.44635e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -16.968 sec. to 49.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01225 ( -0.904032 0.746471 )
Epeak [keV] : 62.4510 ( -14.828 675.522 )
Norm@50keV : 5.12421E-03 ( -0.00303357 0.0102061 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.95 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 56 degrees of freedom
# Null hypothesis probability = 3.346463e-01
Photon flux (15-150 keV) in 66 sec: 0.271676 ( -0.03072 0.0307 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19171e-06 ( -1.56948e-07 1.59093e-07 ) ergs/cm2
Band function
Time interval is from -16.968 sec. to 49.032 sec.
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.6457 (-1.44219 1.62529)
R^2/D10^2 : 5.68227E-02 (-0.0206619 0.0322103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.06 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 57 degrees of freedom
# Null hypothesis probability = 5.466648e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.272e-07 2.534e-08
25- 50 4.250e-07 5.894e-08
50-150 4.226e-07 9.247e-08
15-150 9.748e-07 1.346e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 117.002 (-37.9009 66.0959)
Norm : 1.18596 (-0.091677 0.202)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.31 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.570886e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.041e-07 2.854e-08
25- 50 3.635e-07 5.240e-08
50-150 6.405e-07 2.790e-07
15-150 1.208e-06 3.359e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.71869 (-2.64206 3.5477)
R1^2/D10^2 : 0.349868 (-0.244511 1.71479)
kT2 [keV] : 20.6596 (-5.82874 41.9056)
R2^2/D10^2 : 6.58906E-03 (-0.0063995 0.0133005)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.47 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 55 degrees of freedom
# Null hypothesis probability = 2.847649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.955e-07 1.011e-07
25- 50 3.819e-07 1.779e-07
50-150 5.995e-07 3.396e-07
15-150 1.177e-06 5.943e-07
Peak spectrum fit
Power-law model
Time interval is from -4.968 sec. to -3.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19719 ( -0.609517 0.536403 )
Norm@50keV : 6.19983E-03 ( -0.00185337 0.00177652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.74 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.476170e-01
Photon flux (15-150 keV) in 1 sec: 0.727456 ( -0.228475 0.231226 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.29501e-08 ( -1.8285e-08 1.83371e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.968 sec. to -3.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21298 ( -0.762188 0.52153 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.24415E-03 ( -0.0018659 0.013451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.102334e-01
Photon flux (15-150 keV) in 1 sec: 0.736199 ( -0.238205 0.222954 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -4.968 sec. to -3.968 sec.
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.5340 (-10.428 24.3507)
R^2/D10^2 : 1.27650E-02 (-0.0126529 0.0514134)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.17 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.675572e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.511e-09 9.845e-10
25- 50 8.830e-09 5.560e-09
50-150 4.560e-08 2.869e-08
15-150 5.594e-08 3.519e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-100.399 -199.363)
Norm : 3.12779 (-0.900555 0.900424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.783055e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.789e-09 4.949e-09
25- 50 1.498e-08 9.150e-09
50-150 3.286e-08 2.047e-08
15-150 5.563e-08 3.242e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.08850 (-2.5222 5.23346)
R1^2/D10^2 : 1.51205 (-1.38018 7.15185)
kT2 [keV] : 44.2865 (-20.4781 -44.2963)
R2^2/D10^2 : 2.60209E-03 (-0.00248901 0.0137684)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Null hypothesis probability = 4.400583e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.215e-09 4.883e-09
25- 50 1.211e-08 7.125e-09
50-150 4.694e-08 2.585e-08
15-150 6.727e-08 3.526e-08
Plot creation:
Sun Jul 20 21:46:35 EDT 2014