batgrbproduct Analysis for Trigger=621278
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 Dec 14 01:18:27 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger621278/GCN5_download_cron
======================================================================
Trigger: 00621278 Segment: 000
BAT Trigger Time: 440128584 [s; MET]
Trigger Stop: 440128648 [s; MET]
UTC: 2014-12-13T01:56:11.090460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.660132064697 Dec: 24.0199379187291 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.21
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.21
Flight Position: [ source = BAT ]
RA: 256.660132064697 Dec: 24.0199379187291 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.560588281533 Dec: 23.9297222409012 [deg; J2000]
{ 17h 06m 14.5s , +23d 55' 47.0" }
+/- 4.22874839570999 [arcmin] (estimated 90% radius based on SNR)
+/- 3.41207148424257 [arcmin] (formal 1-sigma fit error)
SNR: 3.87730556513447
Angular difference between Flight and Ground position is 7.686508 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.295604 0.154836 -0.003696 -0.055463
0.049005 0.049485 0.042154 0.036065 [error]
Peak 0.295604 0.154836 -0.003696 -0.055463
0.049005 0.049485 0.042154 0.036065 [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 7.74e-08 5.60e-08 2.69e-08 1.82e-08 1.69e-07 1.79e-07 erg/cm2
Error 2.04e-08 2.28e-08 2.16e-08 2.93e-08 6.14e-08 7.56e-08 erg/cm2
Peak flux Power-law 4.03e-02 1.64e-02 3.94e-03 1.15e-03 6.14e-02 6.19e-02 ph/cm2/s
Error 1.08e-02 6.40e-03 3.07e-03 1.73e-03 1.66e-02 1.69e-02 ph/cm2/s
Fluence Cutoff-PL 7.83e-08 6.79e-08 1.79e-08 9.82e-10 1.65e-07 1.64e-07 erg/cm2
Error 2.19e-08 2.94e-08 2.31e-08 1.87e-08 5.50e-08 5.60e-08 erg/cm2
Peak flux Cutoff-PL 4.01e-02 2.00e-02 2.77e-03 8.42e-05 6.30e-02 6.30e-02 ph/cm2/s
Error 1.16e-02 8.52e-03 3.41e-03 1.14e-03 1.61e-02 1.62e-02 ph/cm2/s
Fluence Band 7.72e-08 6.87e-08 1.82e-08 7.36e-10 1.63e-07 1.63e-07 erg/cm2
Error 2.17e-08 -------- 2.30e-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 3.057 0.693 - - 2.14e-04 1.31e-04 64.390 57
CPL 1.260 0.000 13.2 0.0 3.60e-03 0.00e+00 62.600 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.057 0.693 - - 2.14e-04 1.31e-04 64.390 57
CPL 1.260 0.000 13.2 0.0 3.60e-03 0.00e+00 62.600 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.5606 +23.9297 0.0497 9.3 -114.1 0.3601 3.9 TRIG_00621278
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.05731 ( -0.580963 0.805318 )
Norm@50keV : 2.14204E-04 ( -0.000120758 0.000141673 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.338081e-01
Photon flux (15-150 keV) in 64 sec: 6.14051E-02 ( -0.0165031 0.0166914 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68973e-07 ( -5.72531e-08 6.55226e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25951 ( )
Epeak [keV] : 13.2415 ( )
Norm@50keV : 3.59720E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.60 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 56 degrees of freedom
# Null hypothesis probability = 2.536573e-01
Photon flux (15-150 keV) in 64 sec: 6.29558E-02 ( -0.0161411 0.0159952 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65022e-07 ( -5.18829e-08 5.81542e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31450 ( -3.46036 1.31456 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 12.9773 ( -8.67929 15.272 )
Norm@50keV : 3.19702E-03 ( -0.00320669 663218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.244642e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63395e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.55186 (-1.71914 2.26017)
R^2/D10^2 : 0.334570 (-0.332239 1.48589)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.269145e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.776e-08 4.579e-08
25- 50 6.518e-08 4.144e-08
50-150 4.294e-09 3.926e-09
15-150 1.472e-07 8.659e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.4698 (-8.52644 14.0671)
Norm : 0.808018 (-0.359697 0.893522)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.839991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.837e-08 3.985e-08
25- 50 6.721e-08 3.844e-08
50-150 1.923e-08 1.709e-08
15-150 1.648e-07 8.404e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.13542 (-2.43544 2.47359)
R1^2/D10^2 : 3.08751 (-3.02114 7.21346e+06)
kT2 [keV] : 8.97837 (-8.96859 7.00474)
R2^2/D10^2 : 2.90662E-02 (-0.0288148 0.297574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.76 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.472780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.750e-08 3.690e-08
25- 50 6.995e-08 3.834e-08
50-150 2.340e-08 1.522e-08
15-150 1.708e-07 8.720e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.05731 ( -0.580963 0.805318 )
Norm@50keV : 2.14204E-04 ( -0.000120758 0.000141673 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.338081e-01
Photon flux (15-150 keV) in 64 sec: 6.14051E-02 ( -0.0165031 0.0166914 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68973e-07 ( -5.72531e-08 6.55226e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25951 ( )
Epeak [keV] : 13.2415 ( )
Norm@50keV : 3.59720E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.60 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 56 degrees of freedom
# Null hypothesis probability = 2.536573e-01
Photon flux (15-150 keV) in 64 sec: 6.29558E-02 ( -0.0161411 0.0159951 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65022e-07 ( -5.18829e-08 5.81555e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31450 ( -5.23895 1.31456 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 12.9773 ( -8.60919 15.2718 )
Norm@50keV : 3.19702E-03 ( -0.00320669 663218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.244642e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63395e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.55186 (-1.71914 2.26017)
R^2/D10^2 : 0.334570 (-0.332239 1.48589)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.269145e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.776e-08 4.451e-08
25- 50 6.518e-08 4.205e-08
50-150 4.294e-09 3.808e-09
15-150 1.472e-07 9.296e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.4698 (-8.52644 14.0671)
Norm : 0.808018 (-0.359697 0.893522)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.839991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.837e-08 3.417e-08
25- 50 6.721e-08 3.551e-08
50-150 1.923e-08 1.716e-08
15-150 1.648e-07 8.071e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.13542 (-2.42883 2.47384)
R1^2/D10^2 : 3.08751 (-3.02114 7.21346e+06)
kT2 [keV] : 8.97837 (-8.96908 4.5145)
R2^2/D10^2 : 2.90662E-02 (-0.0288148 0.297574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.76 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.472780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.750e-08 3.878e-08
25- 50 6.995e-08 4.134e-08
50-150 2.340e-08 1.667e-08
15-150 1.708e-07 8.826e-08
Plot creation:
Sun Dec 14 01:22:14 EST 2014