batgrbproduct Analysis for Trigger=618032
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 Nov 10 02:16:03 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger618032/GCN5_download_cron
======================================================================
Trigger: 00618032 Segment: 000
BAT Trigger Time: 437212072 [s; MET]
Trigger Stop: 437212192 [s; MET]
UTC: 2014-11-09T07:47:39.235840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 222.360819451024 Dec: 73.1249180132632 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.55
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.55
Flight Position: [ source = BAT ]
RA: 222.360819451024 Dec: 73.1249180132632 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 222.48324705118 Dec: 73.1526486916919 [deg; J2000]
{ 14h 49m 56.0s , +73d 09' 09.5" }
+/- 2.27665798662006 [arcmin] (estimated 90% radius based on SNR)
+/- 1.01398329538419 [arcmin] (formal 1-sigma fit error)
SNR: 9.3905917695039
Angular difference between Flight and Ground position is 2.703329 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 54.2519999146461 +/- 5.37069083571149
Measured from: -11.987999856472
to: 42.2640000581741 [s; relative to TRIGTIME]
T50: 39.4239999651909 +/- 7.53355399739429
Measured from: -4.8079999089241
to: 34.6160000562668 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 28.0519999861717
to: 29.0519999861717 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.1759999990463
to: 44.1800000071526 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.374076 0.457291 0.281996 0.013320
0.047934 0.049007 0.042176 0.035063 [error]
Peak 0.014172 0.012991 0.019992 0.015751
0.006467 0.006480 0.005670 0.004694 [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 1.20e-07 1.80e-07 2.01e-07 4.26e-07 6.29e-07 9.26e-07 erg/cm2
Error 2.08e-08 2.17e-08 3.98e-08 1.68e-07 9.25e-08 2.10e-07 erg/cm2
Peak flux Power-law 7.44e-02 1.14e-01 1.30e-01 2.84e-01 4.02e-01 6.02e-01 ph/cm2/s
Error 6.50e-02 5.96e-02 4.19e-02 2.46e-01 1.45e-01 2.27e-01 ph/cm2/s
Fluence Cutoff-PL 1.10e-07 1.97e-07 2.01e-07 1.34e-07 5.88e-07 6.42e-07 erg/cm2
Error 2.39e-08 2.93e-08 4.49e-08 1.52e-07 9.92e-08 2.40e-07 erg/cm2
Peak flux Cutoff-PL 7.85e-02 1.17e-01 1.29e-01 2.70e-01 4.06e-01 5.98e-01 ph/cm2/s
Error -------- -------- -------- 3.03e-01 1.46e-01 2.62e-01 ph/cm2/s
Fluence Band 1.09e-07 1.96e-07 2.00e-07 1.37e-07 5.89e-07 6.46e-07 erg/cm2
Error -------- -------- 4.31e-08 -------- 9.88e-08 -------- 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 1.837 0.220 - - 1.19e-03 1.73e-04 50.720 57
CPL 1.053 0.948 53.4 -19.0 3.25e-03 6.16e-03 48.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.807 0.737 - - 3.50e-03 1.36e-03 38.030 57
CPL 0.825 0.721 9999.4 0.0 3.53e-03 8.53e-03 38.040 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 57.356 -13.176 44.180
T90 54.252 -11.988 42.264
T50 39.424 -4.808 34.616
Peak 1.000 28.052 29.052
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
222.4832 +73.1526 0.0205 17.0 71.8 0.9450 9.4 TRIG_00618032
------------------------------------------
Foreground time interval of the image:
-13.176 44.180 (delta_t = 57.356 [sec])
Background time interval of the image:
-239.000 -13.176 (delta_t = 225.824 [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 -13.176 sec. to 44.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83739 ( -0.213538 0.226035 )
Norm@50keV : 1.19209E-03 ( -0.000175116 0.000170926 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.72 using 59 PHA bins.
# Reduced chi-squared = 0.8899 for 57 degrees of freedom
# Null hypothesis probability = 7.080922e-01
Photon flux (15-150 keV) in 57.36 sec: 0.166709 ( -0.0201275 0.0201313 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.28855e-07 ( -9.14588e-08 9.36276e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.176 sec. to 44.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05253 ( -1.04673 0.8484 )
Epeak [keV] : 53.4120 ( -15.3238 -53.412 )
Norm@50keV : 3.25295E-03 ( -0.00325297 0.00906817 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.24 using 59 PHA bins.
# Reduced chi-squared = 0.8615 for 56 degrees of freedom
# Null hypothesis probability = 7.598988e-01
Photon flux (15-150 keV) in 57.36 sec: 0.162073 ( -0.020685 0.020702 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.88376e-07 ( -9.6355e-08 1.02084e-07 ) ergs/cm2
Band function
Time interval is from -13.176 sec. to 44.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05387 ( -0.915856 1.00148 )
beta : -10.00000 ( 10 3.74037e-07 )
Epeak [keV] : 53.4496 ( -15.371 1394.64 )
Norm@50keV : 3.24586E-03 ( -0.000388681 0.00908306 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.24 using 59 PHA bins.
# Reduced chi-squared = 0.8772 for 55 degrees of freedom
# Null hypothesis probability = 7.285197e-01
Photon flux (15-150 keV) in 57.36 sec: 0.163541 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.88772e-07 ( -5.8837e-07 -9.7138e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.4888 (-1.5982 1.86247)
R^2/D10^2 : 4.75128E-02 (-0.0202442 0.0351052)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.03 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.666632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.572e-08 1.634e-08
25- 50 2.261e-07 3.880e-08
50-150 1.741e-07 5.346e-08
15-150 4.760e-07 7.795e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.1536 (-29.7995 60.7585)
Norm : 0.762608 (-0.121489 0.151352)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8506 for 57 degrees of freedom
# Null hypothesis probability = 7.817107e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.141e-07 1.979e-08
25- 50 1.926e-07 3.080e-08
50-150 2.916e-07 1.375e-07
15-150 5.983e-07 1.576e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.50489 (-2.2021 3.04946)
R1^2/D10^2 : 0.879147 (-0.728015 26.8314)
kT2 [keV] : 16.0994 (-3.67405 7.64831)
R2^2/D10^2 : 1.13179E-02 (-0.00914237 0.0211424)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.77 using 59 PHA bins.
# Reduced chi-squared = 0.8685 for 55 degrees of freedom
# Null hypothesis probability = 7.448230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.140e-07 6.284e-08
25- 50 1.866e-07 8.884e-08
50-150 2.678e-07 1.528e-07
15-150 5.685e-07 2.335e-07
Peak spectrum fit
Power-law model
Time interval is from 28.052 sec. to 29.052 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.806544 ( -0.823027 0.650226 )
Norm@50keV : 3.50026E-03 ( -0.00145386 0.00125694 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.03 using 59 PHA bins.
# Reduced chi-squared = 0.6671 for 57 degrees of freedom
# Null hypothesis probability = 9.750014e-01
Photon flux (15-150 keV) in 1 sec: 0.402183 ( -0.142605 0.146456 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07929e-08 ( -1.34702e-08 1.34856e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.052 sec. to 29.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.824659 ( -0.811047 0.631163 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.52969E-03 ( -0.00148077 0.015585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.04 using 59 PHA bins.
# Reduced chi-squared = 0.6793 for 56 degrees of freedom
# Null hypothesis probability = 9.683862e-01
Photon flux (15-150 keV) in 1 sec: 0.406255 ( -0.148576 0.142559 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07548e-08 ( -1.34083e-08 1.33358e-08 ) ergs/cm2
Band function
Time interval is from 28.052 sec. to 29.052 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -0.806329 ( -0.65009 0.823028 )
Epeak [keV] : 14.2622 ( -14.2622 -14.2622 )
Norm@50keV : 0.475706 ( -0.1976 0.170837 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.03 using 59 PHA bins.
# Reduced chi-squared = 0.6914 for 55 degrees of freedom
# Null hypothesis probability = 9.606108e-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] : 32.5622 (-13.1411 57.3462)
R^2/D10^2 : 4.57188E-03 (-0.00456992 0.0170916)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.36 using 59 PHA bins.
# Reduced chi-squared = 0.7081 for 57 degrees of freedom
# Null hypothesis probability = 9.533670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.201e-10 4.624e-10
25- 50 4.587e-09 2.824e-09
50-150 3.312e-08 2.017e-08
15-150 3.843e-08 2.299e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-100.25 -199.363)
Norm : 1.71770 (-0.595556 0.595556)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.23 using 59 PHA bins.
# Reduced chi-squared = 0.7408 for 57 degrees of freedom
# Null hypothesis probability = 9.280220e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.277e-09 2.703e-09
25- 50 8.228e-09 5.190e-09
50-150 1.805e-08 1.130e-08
15-150 3.055e-08 1.815e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.93850 (-3.78157 21.058)
R1^2/D10^2 : 4.04281 (-4.03445 76.0766)
kT2 [keV] : 41.1585 (-18.7691 -41.1583)
R2^2/D10^2 : 2.31768E-03 (-0.00224669 0.00450822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.04 using 59 PHA bins.
# Reduced chi-squared = 0.6734 for 55 degrees of freedom
# Null hypothesis probability = 9.699300e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.906e-09 2.336e-09
25- 50 4.591e-09 2.468e-09
50-150 3.379e-08 1.998e-08
15-150 4.228e-08 2.360e-08
Plot creation:
Mon Nov 10 02:18:59 EST 2014