batgrbproduct Analysis for Trigger=617110
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): Fri Oct 31 17:18:14 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger617110/GCN5_download_cron
======================================================================
Trigger: 00617110 Segment: 000
BAT Trigger Time: 436432719.424 [s; MET]
Trigger Stop: 436432721.472 [s; MET]
UTC: 2014-10-31T07:18:26.698680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 128.599081849205 Dec: -59.1379265592003 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.53
Image Trigger?: NO
Rate S/N Ratio: 16.062378404209 [ if not an image trigger ]
Image S/N Ratio: 8.53
Flight Position: [ source = BAT ]
RA: 128.599081849205 Dec: -59.1379265592003 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 128.638489142044 Dec: -59.1615574217876 [deg; J2000]
{ 08h 34m 33.2s , -59d 09' 41.6" }
+/- 1.41566110937955 [arcmin] (estimated 90% radius based on SNR)
+/- 0.471316584282977 [arcmin] (formal 1-sigma fit error)
SNR: 18.5123790932145
Angular difference between Flight and Ground position is 1.865582 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 897.091999948025 +/- 628.091645050989
Measured from: -12.6799998879433
to: 884.412000060081 [s; relative to TRIGTIME]
T50: 897.091999948025 +/- 631.095046090515
Measured from: -12.6799998879433
to: 884.412000060081 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.812000036239624
to: 0.187999963760376 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.6800000071526
to: 884.412000000477 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.308566 1.726685 1.563205 0.402730
0.180530 0.183489 0.155690 0.132582 [error]
Peak 0.047902 0.071864 0.068904 0.033209
0.011452 0.012374 0.011408 0.009066 [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 3.74e-07 7.70e-07 1.24e-06 4.47e-06 3.44e-06 6.85e-06 erg/cm2
Error 7.53e-08 9.16e-08 1.51e-07 1.24e-06 3.78e-07 1.32e-06 erg/cm2
Peak flux Power-law 4.61e-01 5.44e-01 4.64e-01 6.72e-01 1.71e+00 2.14e+00 ph/cm2/s
Error 1.45e-01 1.07e-01 8.67e-02 2.61e-01 2.95e-01 3.67e-01 ph/cm2/s
Fluence Cutoff-PL 3.69e-07 7.74e-07 1.24e-06 4.13e-06 3.43e-06 6.52e-06 erg/cm2
Error 8.16e-08 9.55e-08 1.57e-07 -------- 2.90e-07 1.92e-06 erg/cm2
Peak flux Cutoff-PL 4.32e-01 5.58e-01 4.82e-01 4.99e-01 1.69e+00 1.97e+00 ph/cm2/s
Error 1.71e-01 1.19e-01 1.06e-01 4.83e-01 2.99e-01 4.93e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.313 0.185 - - 3.93e-04 4.00e-05 55.710 57
CPL 1.311 0.186 9999.2 0.0 3.94e-04 2.17e-04 55.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.230 0.279 - - 1.45e-02 2.40e-03 63.540 57
CPL 0.939 1.601 201.0 0.0 1.99e-02 3.54e-02 63.330 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: 892.480000 sec.
T50 in the 50-300 keV band: 439.744000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 897.092 -12.680 884.412
T90 897.092 -12.680 884.412
T50 897.092 -12.680 884.412
Peak 1.000 -0.812 0.188
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
128.6385 -59.1616 0.0105 34.5 -71.9 2.5380 18.5 TRIG_00617110
------------------------------------------
Foreground time interval of the image:
-12.680 27.377 (delta_t = 40.057 [sec])
Background time interval of the image:
-239.424 -12.680 (delta_t = 226.744 [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
-12.680000 237.006000
238.576000 708.426000
714.576000 839.295900
840.576000 884.412000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31286 ( -0.186675 0.183653 )
Norm@50keV : 3.92699E-04 ( -3.99961e-05 3.99916e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.71 using 59 PHA bins.
# Reduced chi-squared = 0.9774 for 57 degrees of freedom
# Null hypothesis probability = 5.234087e-01
Photon flux (15-150 keV) in 888.1 sec: 4.69629E-02 ( -0.00508344 0.00510898 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43565e-06 ( -3.76834e-07 3.78655e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-12.680000 237.006000
238.576000 708.426000
714.576000 839.295900
840.576000 884.412000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31112 ( -0.189633 0.183228 )
Epeak [keV] : 9999.24 ( -9999.36 -9999.36 )
Norm@50keV : 3.94117E-04 ( -0.000394324 4.01485e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9950 for 56 degrees of freedom
# Null hypothesis probability = 4.854747e-01
Photon flux (15-150 keV) in 888.1 sec: 4.69756E-02 ( -0.0026101 0.0050309 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.43389e-06 ( -3.81883e-07 1.98037e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-12.680000 237.006000
238.576000 708.426000
714.576000 839.295900
840.576000 884.412000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.968848 ( 0.973764 0.973764 )
beta : -1.31628 ( 1.31623 0.190486 )
Epeak [keV] : 67.9767 ( -70.4299 -70.4299 )
Norm@50keV : 7.29781E-04 ( -0.000348689 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.476616e-01
Photon flux (15-150 keV) in 888.1 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] : 19.5945 (-2.73473 3.30885)
R^2/D10^2 : 2.18081E-03 (-0.000881365 0.00144693)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.95 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.401577e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.445e-07 3.095e-08
25- 50 7.100e-07 1.171e-07
50-150 2.014e-06 3.375e-07
15-150 2.869e-06 3.996e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.196986 (-0.0203013 0.0202987)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.83 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.076053e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.356e-07 1.337e-07
25- 50 8.379e-07 3.402e-07
50-150 1.838e-06 9.840e-07
15-150 3.111e-06 1.694e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.48688 (-1.75701 2.26626)
R1^2/D10^2 : 6.05564E-02 (-0.039684 0.146091)
kT2 [keV] : 30.3914 (-6.5107 12.7426)
R2^2/D10^2 : 4.48502E-04 (-0.000295869 0.00062622)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 55 degrees of freedom
# Null hypothesis probability = 5.121456e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.907e-07 2.001e-07
25- 50 7.465e-07 2.687e-07
50-150 2.347e-06 1.114e-06
15-150 3.484e-06 1.326e-06
Peak spectrum fit
Power-law model
Time interval is from -0.812 sec. to 0.188 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23001 ( -0.281861 0.275358 )
Norm@50keV : 1.44914E-02 ( -0.00240468 0.00240233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.54 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 57 degrees of freedom
# Null hypothesis probability = 2.571582e-01
Photon flux (15-150 keV) in 1 sec: 1.70853 ( -0.294776 0.295665 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45805e-07 ( -2.59863e-08 2.61311e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.812 sec. to 0.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.939330 ( -1.35312 1.84798 )
Epeak [keV] : 200.961 ( -200.975 -200.975 )
Norm@50keV : 1.98843E-02 ( -0.00758658 0.0631617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.33 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 56 degrees of freedom
# Null hypothesis probability = 2.336813e-01
Photon flux (15-150 keV) in 1 sec: 1.69468 ( -0.29719 0.29997 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44294e-07 ( -2.7479e-08 2.6864e-08 ) ergs/cm2
Band function
Time interval is from -0.812 sec. to 0.188 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.607229 ( 0.553891 5.31522 )
beta : -1.43378 ( 1.4504 0.474921 )
Epeak [keV] : 104.920 ( -100.486 386.917 )
Norm@50keV : 3.04163E-02 ( -0.020391 986301 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.07 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.125828e-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] : 18.1713 (-3.48992 4.82813)
R^2/D10^2 : 0.109168 (-0.0598202 0.116025)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.85 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.180328e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.195e-09 2.577e-09
25- 50 3.351e-08 9.370e-09
50-150 8.051e-08 2.627e-08
15-150 1.212e-07 3.028e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 7.14558 (-1.20715 1.20702)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.665336e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.780e-08 1.025e-08
25- 50 3.424e-08 1.960e-08
50-150 7.510e-08 4.291e-08
15-150 1.271e-07 7.280e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3221 (-7.3543 4.85196)
R1^2/D10^2 : 0.309856 ( )
kT2 [keV] : 75.4741 (-54.6634 -76.1747)
R2^2/D10^2 : 1.11654E-03 (-0.000885929 0.0139681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.15 using 59 PHA bins.
#Fit statistic : Chi-Squared = 63.13 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Null hypothesis probability = 2.105718e-01
# Null hypothesis probability = 2.110056e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-08 6.315e-09
25- 50 3.606e-08 2.068e-08
50-150 9.576e-08 4.625e-08
15-150 1.425e-07 7.020e-08
Plot creation:
Fri Oct 31 17:21:51 EDT 2014