batgrbproduct Analysis for Trigger=586480
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): Thu Feb 13 10:00:17 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger586480/GCN5_download_cron
======================================================================
Trigger: 00586480 Segment: 000
BAT Trigger Time: 413918144 [s; MET]
Trigger Stop: 413918208 [s; MET]
UTC: 2014-02-12T17:15:32.363320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.155363882785 Dec: -28.7089943990076 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.81
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.81
Flight Position: [ source = BAT ]
RA: 266.155363882785 Dec: -28.7089943990076 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.150942913612 Dec: -28.6727059400539 [deg; J2000]
{ 17h 44m 36.2s , -28d 40' 21.7" }
+/- 2.9818251668845 [arcmin] (estimated 90% radius based on SNR)
+/- 1.53564035330815 [arcmin] (formal 1-sigma fit error)
SNR: 6.38684975840073
Angular difference between Flight and Ground position is 2.189706 arcmin
Partial Coding Fraction: 1.015625 [ 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 0.437383 0.354659 0.016967 -0.012601
0.057293 0.052161 0.043187 0.037835 [error]
Peak 0.437383 0.354659 0.016967 -0.012601
0.057293 0.052161 0.043187 0.037835 [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 1.23e-07 1.21e-07 8.38e-08 9.11e-08 3.65e-07 4.19e-07 erg/cm2
Error 2.44e-08 2.40e-08 3.19e-08 6.42e-08 7.80e-08 1.15e-07 erg/cm2
Peak flux Power-law 6.35e-02 3.49e-02 1.20e-02 5.41e-03 1.13e-01 1.16e-01 ph/cm2/s
Error 1.28e-02 6.67e-03 4.44e-03 3.57e-03 1.92e-02 1.98e-02 ph/cm2/s
Fluence Cutoff-PL 1.15e-07 1.52e-07 5.08e-08 2.42e-09 3.20e-07 3.20e-07 erg/cm2
Error 2.76e-08 3.37e-08 3.62e-08 1.43e-08 6.54e-08 6.63e-08 erg/cm2
Peak flux Cutoff-PL 5.78e-02 4.38e-02 7.95e-03 2.08e-04 1.10e-01 1.10e-01 ph/cm2/s
Error 1.46e-02 9.43e-03 5.20e-03 1.06e-03 1.87e-02 1.87e-02 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 2.536 0.355 - - 5.65e-04 1.61e-04 45.530 57
CPL 0.065 2.144 26.6 0.0 2.27e-02 0.00e+00 39.680 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.536 0.355 - - 5.65e-04 1.61e-04 45.530 57
CPL 0.065 2.144 26.6 0.0 2.27e-02 0.00e+00 39.680 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
266.1509 -28.6727 0.0301 5.1 154.1 0.6852 6.4 TRIG_00586480
------------------------------------------
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: 2.53596 ( -0.330731 0.378672 )
Norm@50keV : 5.64619E-04 ( -0.000159689 0.000161669 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.7988 for 57 degrees of freedom
# Null hypothesis probability = 8.626542e-01
Photon flux (15-150 keV) in 64 sec: 0.113405 ( -0.019162 0.0191737 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6494e-07 ( -7.58029e-08 8.02413e-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: 6.49089E-02 ( -2.47575 1.81321 )
Epeak [keV] : 26.6442 ( )
Norm@50keV : 2.27328E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.68 using 59 PHA bins.
# Reduced chi-squared = 0.7086 for 56 degrees of freedom
# Null hypothesis probability = 9.514209e-01
Photon flux (15-150 keV) in 64 sec: 0.109780 ( -0.0186705 0.018774 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19931e-07 ( -6.11034e-08 6.96941e-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 : -0.229531 ( -1.71707 2.6093 )
beta : -9.37167 ( 9.37167 19.3711 )
Epeak [keV] : 26.3249 ( -5.56851 6.86957 )
Norm@50keV : 1.72204E-02 ( -0.0200885 0.770622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.75 using 59 PHA bins.
# Reduced chi-squared = 0.7227 for 55 degrees of freedom
# Null hypothesis probability = 9.394917e-01
Photon flux (15-150 keV) in 64 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] : 7.45791 (-1.17494 1.33672)
R^2/D10^2 : 0.172946 (-0.0859602 0.179215)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.13 using 59 PHA bins.
# Reduced chi-squared = 0.7216 for 57 degrees of freedom
# Null hypothesis probability = 9.438907e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.051e-07 2.650e-08
25- 50 1.623e-07 4.534e-08
50-150 3.364e-08 1.850e-08
15-150 3.011e-07 7.667e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.5493 (-8.70519 13.8187)
Norm : 0.943515 (-0.271392 0.403213)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.95 using 59 PHA bins.
# Reduced chi-squared = 0.7185 for 57 degrees of freedom
# Null hypothesis probability = 9.461850e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.219e-07 2.723e-08
25- 50 1.382e-07 3.699e-08
50-150 7.417e-08 4.278e-08
15-150 3.343e-07 9.146e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.21049 (-3.24274 -3.24274)
R1^2/D10^2 : 2.41883 (-2.38206 -2.38206)
kT2 [keV] : 8.75195 (-1.94779 -8.76984)
R2^2/D10^2 : 7.59135E-02 (-0.0752914 0.169517)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.09 using 59 PHA bins.
# Reduced chi-squared = 0.7107 for 55 degrees of freedom
# Null hypothesis probability = 9.483656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.149e-07 5.613e-08
25- 50 1.531e-07 8.646e-08
50-150 5.081e-08 3.328e-08
15-150 3.189e-07 1.588e-07
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: 2.53596 ( -0.330731 0.378672 )
Norm@50keV : 5.64619E-04 ( -0.000159689 0.000161669 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.7988 for 57 degrees of freedom
# Null hypothesis probability = 8.626542e-01
Photon flux (15-150 keV) in 64 sec: 0.113405 ( -0.019162 0.0191737 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6494e-07 ( -7.58029e-08 8.02413e-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: 6.49089E-02 ( -2.47575 1.81321 )
Epeak [keV] : 26.6442 ( )
Norm@50keV : 2.27328E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.68 using 59 PHA bins.
# Reduced chi-squared = 0.7086 for 56 degrees of freedom
# Null hypothesis probability = 9.514209e-01
Photon flux (15-150 keV) in 64 sec: 0.109780 ( -0.0186705 0.018774 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19931e-07 ( -6.11034e-08 6.96941e-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 : -0.229531 ( -1.71707 2.6093 )
beta : -9.37167 ( 9.37167 19.3711 )
Epeak [keV] : 26.3249 ( -5.56851 6.86957 )
Norm@50keV : 1.72204E-02 ( -0.0200885 0.770622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.75 using 59 PHA bins.
# Reduced chi-squared = 0.7227 for 55 degrees of freedom
# Null hypothesis probability = 9.394917e-01
Photon flux (15-150 keV) in 64 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] : 7.45791 (-1.17494 1.33672)
R^2/D10^2 : 0.172946 (-0.0859602 0.179215)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.13 using 59 PHA bins.
# Reduced chi-squared = 0.7216 for 57 degrees of freedom
# Null hypothesis probability = 9.438907e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.051e-07 2.727e-08
25- 50 1.623e-07 4.688e-08
50-150 3.364e-08 1.714e-08
15-150 3.011e-07 8.915e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.5493 (-8.70519 13.8187)
Norm : 0.943515 (-0.271392 0.403213)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.95 using 59 PHA bins.
# Reduced chi-squared = 0.7185 for 57 degrees of freedom
# Null hypothesis probability = 9.461850e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.219e-07 2.746e-08
25- 50 1.382e-07 3.840e-08
50-150 7.417e-08 4.295e-08
15-150 3.343e-07 9.626e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.21049 (-3.24274 -3.24274)
R1^2/D10^2 : 2.41883 (-2.38206 -2.38206)
kT2 [keV] : 8.75195 (-1.94808 -8.76984)
R2^2/D10^2 : 7.59135E-02 (-0.0752914 0.169517)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.09 using 59 PHA bins.
# Reduced chi-squared = 0.7107 for 55 degrees of freedom
# Null hypothesis probability = 9.483656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.149e-07 6.013e-08
25- 50 1.531e-07 8.861e-08
50-150 5.081e-08 3.398e-08
15-150 3.189e-07 1.681e-07
Plot creation:
Thu Feb 13 10:46:09 EST 2014