batgrbproduct Analysis for Trigger=601646
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): Sat Jun 14 20:57:58 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger601646/GCN5_download_cron
======================================================================
Trigger: 00601646 Segment: 000
BAT Trigger Time: 424400712 [s; MET]
Trigger Stop: 424400776 [s; MET]
UTC: 2014-06-14T01:04:59.863980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 231.231943297946 Dec: -79.0949444262299 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.09
Flight Position: [ source = BAT ]
RA: 231.231943297946 Dec: -79.0949444262299 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 231.170825786448 Dec: -79.1103107562281 [deg; J2000]
{ 15h 24m 41.0s , -79d 06' 37.1" }
+/- 2.37949609264149 [arcmin] (estimated 90% radius based on SNR)
+/- 1.07137528587274 [arcmin] (formal 1-sigma fit error)
SNR: 8.81622512395703
Angular difference between Flight and Ground position is 1.153539 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 854.659999907017 +/- 160.05867252182
Measured from: 48.8920001387596
to: 903.552000045776 [s; relative to TRIGTIME]
T50: 542.55999994278 +/- 84.5985920310756
Measured from: 68.5440001487732
to: 611.104000091553 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 956.871999979019
to: 957.871999979019 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.512000024318695
to: 957.639999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.776656 0.879123 0.489332 0.235946
0.189188 0.201136 0.187672 0.195927 [error]
Peak -0.005192 0.004422 0.018703 0.023010
0.008685 0.009821 0.010095 0.012139 [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 1.79e-07 3.29e-07 4.65e-07 1.38e-06 1.33e-06 2.35e-06 erg/cm2
Error 7.02e-08 8.46e-08 1.77e-07 1.13e-06 4.25e-07 1.29e-06 erg/cm2
Peak flux Power-law 2.46e-04 1.31e-02 3.17e-02 7.84e-02 4.92e-01 2.13e-01 ph/cm2/s
Error 5.00e-02 7.66e-02 1.07e+00 2.09e-01 1.20e+00 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 1.70e-07 3.54e-07 4.62e-07 5.14e-07 1.24e-06 1.50e-06 erg/cm2
Error 7.75e-08 1.14e-07 2.10e-07 8.86e-07 4.84e-07 1.48e-06 erg/cm2
Peak flux Cutoff-PL 3.20e-01 1.87e-01 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
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 1.501 0.465 - - 1.47e-04 4.18e-05 67.360 57
CPL 0.932 1.873 82.4 0.0 3.06e-04 5.82e-03 67.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.207 0.699 - - 1.46e-03 1.68e-03 44.600 57
CPL -9.112 0.000 74.1 0.0 5.65e+00 5.84e+02 43.230 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: 32.000000 sec.
T50 in the 50-300 keV band: 17.024000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 957.128 0.512 957.640
T90 854.660 48.892 903.552
T50 542.560 68.544 611.104
Peak 1.000 956.872 957.872
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
231.1708 -79.1103 0.0217 11.3 49.0 0.9984 8.8 TRIG_00601646
------------------------------------------
Foreground time interval of the image:
0.512 74.101 (delta_t = 73.589 [sec])
Background time interval of the image:
-141.799 -88.660 (delta_t = 53.139 [sec])
-84.000 0.512 (delta_t = 84.512 [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
0.512000 485.580000
487.000000 624.420000
626.000000 873.070000
874.000000 957.640000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50142 ( -0.45389 0.475566 )
Norm@50keV : 1.47034E-04 ( -4.24934e-05 4.10436e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.36 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.638669e-01
Photon flux (15-150 keV) in 953.2 sec: 1.83626E-02 ( -0.00469449 0.00469448 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32925e-06 ( -4.12367e-07 4.36998e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.512000 485.580000
487.000000 624.420000
626.000000 873.070000
874.000000 957.640000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.931971 ( -2.7365 1.00886 )
Epeak [keV] : 82.4496 ( -82.4521 -82.4521 )
Norm@50keV : 3.06383E-04 ( -0.000306372 0.011338 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.04 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 56 degrees of freedom
# Null hypothesis probability = 1.482457e-01
Photon flux (15-150 keV) in 953.2 sec: 1.79041E-02 ( -0.0048843 0.0048687 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23535e-06 ( -4.64529e-07 5.03966e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.512000 485.580000
487.000000 624.420000
626.000000 873.070000
874.000000 957.640000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.36394 ( -1.53149 2.22161 )
beta : -1.71940 ( 9.37021 19.3702 )
Epeak [keV] : 26.9515 ( -47.9996 -86.7822 )
Norm@50keV : 3.71764 ( -3.71544 1.40479 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.36 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 55 degrees of freedom
# Null hypothesis probability = 1.402266e-01
Photon flux (15-150 keV) in 953.2 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] : 12.5186 (-3.4802 5.34668)
R^2/D10^2 : 3.93149E-03 (-0.00279448 0.00849597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.39 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.256224e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.245e-07 6.250e-08
25- 50 4.114e-07 2.205e-07
50-150 3.984e-07 2.509e-07
15-150 9.343e-07 4.573e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.355 (-199.36 -199.36)
Norm : 7.49471E-02 (-0.0191099 0.0191183)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.12 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.688609e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.779e-07 1.072e-07
25- 50 3.422e-07 2.050e-07
50-150 7.505e-07 4.520e-07
15-150 1.271e-06 7.573e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.27232 (-7.46777 -7.46777)
R1^2/D10^2 : 1.76218E-02 (-0.0158977 -0.0158977)
kT2 [keV] : 26.0868 (-28.1315 -28.1315)
R2^2/D10^2 : 2.17395E-04 (-0.000164009 0.000973994)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.82 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 55 degrees of freedom
# Null hypothesis probability = 1.318824e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.722e-07 1.090e-07
25- 50 3.570e-07 1.976e-07
50-150 7.364e-07 4.436e-07
15-150 1.266e-06 6.286e-07
Peak spectrum fit
Power-law model
Time interval is from 956.872 sec. to 957.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.206591 ( 0.194619 1.59194 )
Norm@50keV : 1.45656E-03 ( -0.0014608 0.0019069 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.60 using 59 PHA bins.
# Reduced chi-squared = 0.7825 for 57 degrees of freedom
# Null hypothesis probability = 8.838220e-01
Photon flux (15-150 keV) in 1 sec: 0.212881 ( -0.213224 0.20522 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.96156e-08 ( -2.70268e-08 2.73854e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 956.872 sec. to 957.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.11212 ( )
Epeak [keV] : 74.0677 ( )
Norm@50keV : 5.65442 ( -6.23398 1162.16 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.23 using 59 PHA bins.
# Reduced chi-squared = 0.7720 for 56 degrees of freedom
# Null hypothesis probability = 8.940967e-01
Photon flux (15-150 keV) in 1 sec: 0.320392 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 956.872 sec. to 957.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06494 ( 1.10626 1.10626 )
beta : 0.226893 ( -1.60012 -0.206175 )
Epeak [keV] : 24.5768 ( -25.348 -25.348 )
Norm@50keV : 1.73131E-03 ( -0.00174365 6608.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.60 using 59 PHA bins.
# Reduced chi-squared = 0.8110 for 55 degrees of freedom
# Null hypothesis probability = 8.406420e-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] : 37.8534 ( )
R^2/D10^2 : 2.07952E-03 (-0.00209227 0.0288562)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.19 using 59 PHA bins.
# Reduced chi-squared = 0.7752 for 57 degrees of freedom
# Null hypothesis probability = 8.925303e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.85 using 59 PHA bins.
# Reduced chi-squared = 0.8395 for 57 degrees of freedom
# Null hypothesis probability = 8.006709e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00000 (-4 -4)
R1^2/D10^2 : 0.0 (0 0)
kT2 [keV] : 38.3884 (-23.292 -38.3884)
R2^2/D10^2 : 2.11458E-03 (-0.00209599 0.0287102)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.18 using 59 PHA bins.
# Reduced chi-squared = 0.8033 for 55 degrees of freedom
# Null hypothesis probability = 8.516864e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat Jun 14 21:02:10 EDT 2014