batgrbproduct Analysis for Trigger=582894
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 Jan 5 15:24:42 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger582894/GCN5_download_cron
======================================================================
Trigger: 00582894 Segment: 000
BAT Trigger Time: 410537968 [s; MET]
Trigger Stop: 410539640 [s; MET]
UTC: 2014-01-04T14:19:16.522280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.1896554852019 Dec: 0.545786889397492 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.93
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.93
Flight Position: [ source = BAT ]
RA: 54.1896554852019 Dec: 0.545786889397492 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.2964096540945 Dec: 0.621279108384954 [deg; J2000]
{ 03h 37m 11.1s , +00d 37' 16.6" }
+/- 5.66455844950495 [arcmin] (estimated 90% radius based on SNR)
+/- 3.91253811985162 [arcmin] (formal 1-sigma fit error)
SNR: 2.55368227612337
Angular difference between Flight and Ground position is 7.844720 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 1672 +/-
Measured from: 0
to: 1672 [s; relative to TRIGTIME]
T50: 1672 +/-
Measured from: 0
to: 1672 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1672 second)
Measured from: 0
to: 1672 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1672 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.250460 0.697069 0.271708 -0.067937
0.187450 0.192483 0.169211 0.150554 [error]
Peak 1.250460 0.697069 0.271708 -0.067937
0.187450 0.192483 0.169211 0.150554 [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 3.60e-07 2.88e-07 1.55e-07 1.21e-07 8.57e-07 9.24e-07 erg/cm2
Error 8.66e-08 1.05e-07 1.20e-07 1.97e-07 2.95e-07 4.01e-07 erg/cm2
Peak flux Power-law 1.25e-02 5.58e-03 1.50e-03 5.01e-04 1.98e-02 2.00e-02 ph/cm2/s
Error 3.07e-03 1.93e-03 1.12e-03 7.59e-04 4.61e-03 4.76e-03 ph/cm2/s
Fluence Cutoff-PL 3.62e-07 2.85e-07 1.51e-07 1.16e-07 8.47e-07 9.13e-07 erg/cm2
Error 8.61e-08 1.05e-07 1.20e-07 1.93e-07 3.07e-07 4.00e-07 erg/cm2
Peak flux Cutoff-PL 1.25e-02 5.55e-03 1.48e-03 4.85e-04 1.98e-02 2.00e-02 ph/cm2/s
Error 3.05e-03 1.44e-03 1.40e-03 8.40e-04 4.55e-03 4.69e-03 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 2.894 0.693 - - 7.78e-05 4.46e-05 54.060 57
CPL 1.931 0.000 1.9 0.0 4.06e-04 0.00e+00 54.950 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.894 0.693 - - 7.78e-05 4.46e-05 54.060 57
CPL 1.931 0.000 1.9 0.0 4.06e-04 0.00e+00 54.950 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 1672.000 0.000 1672.000
T90 1672.000 0.000 1672.000
T50 1672.000 0.000 1672.000
Peak 1672.000 0.000 1672.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.2964 +0.6213 0.0749 15.2 78.9 1.5052 2.6 TRIG_00582894
------------------------------------------
Foreground time interval of the image:
0.000 308.560 (delta_t = 308.560 [sec])
310.000 878.130 (delta_t = 568.130 [sec])
879.000 963.111 (delta_t = 84.111 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 308.560000
310.000000 878.130000
879.000000 963.111300
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.89376 ( -0.598404 0.788187 )
Norm@50keV : 7.78288E-05 ( -4.15789e-05 4.75467e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9484 for 57 degrees of freedom
# Null hypothesis probability = 5.860480e-01
Photon flux (15-150 keV) in 960.8 sec: 1.98339E-02 ( -0.00459674 0.00462049 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.57298e-07 ( -2.71709e-07 3.18583e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 308.560000
310.000000 878.130000
879.000000 963.111300
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93050 ( )
Epeak [keV] : 1.88314 ( )
Norm@50keV : 4.06439E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.95 using 59 PHA bins.
# Reduced chi-squared = 0.9812 for 56 degrees of freedom
# Null hypothesis probability = 5.146485e-01
Photon flux (15-150 keV) in 960.8 sec: 1.97889E-02 ( -0.0045481 0.0045599 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46853e-07 ( -2.93125e-07 3.21499e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 308.560000
310.000000 878.130000
879.000000 963.111300
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.78546 ( 1.78211 1.78211 )
beta : -2.94938 ( 2.94651 0.646668 )
Epeak [keV] : 4.01491 ( -4.0141 149.264 )
Norm@50keV : 6.39982E-04 ( -0.000714222 170157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 55 degrees of freedom
# Null hypothesis probability = 5.120679e-01
Photon flux (15-150 keV) in 960.8 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] : 4.71005 (-1.14297 1.51008)
R^2/D10^2 : 0.211879 (-0.212078 0.614722)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.748774e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-07 2.206e-07
25- 50 2.177e-07 1.371e-07
50-150 6.573e-09 6.509e-09
15-150 6.117e-07 3.534e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.6257 (-7.2209 15.8692)
Norm : 0.295923 (-0.151178 0.388347)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.29 using 59 PHA bins.
# Reduced chi-squared = 0.9700 for 57 degrees of freedom
# Null hypothesis probability = 5.395626e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.703e-07 1.520e-07
25- 50 2.780e-07 1.473e-07
50-150 5.990e-08 5.390e-08
15-150 7.082e-07 3.199e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.22712 (-1.34761 1.39427)
R1^2/D10^2 : 0.333560 (-0.244205 0.896106)
kT2 [keV] : 36.1428 (-33.2685 -36.1502)
R2^2/D10^2 : 5.11928E-05 (-5.05639e-05 0.0144327)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9536 for 55 degrees of freedom
# Null hypothesis probability = 5.726521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-07 2.178e-07
25- 50 2.184e-07 1.207e-07
50-150 4.958e-07 3.535e-07
15-150 1.102e-06 5.702e-07
Peak spectrum fit
Power-law model
Time interval is from 879.000 sec. to 963.111 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.89376 ( -0.598404 0.788187 )
Norm@50keV : 7.78288E-05 ( -4.15789e-05 4.75467e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9484 for 57 degrees of freedom
# Null hypothesis probability = 5.860480e-01
Photon flux (15-150 keV) in 960.8 sec: 1.98339E-02 ( -0.00459674 0.00462049 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.57298e-07 ( -2.71709e-07 3.18583e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 879.000 sec. to 963.111 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93050 ( )
Epeak [keV] : 1.88314 ( )
Norm@50keV : 4.06439E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.95 using 59 PHA bins.
# Reduced chi-squared = 0.9812 for 56 degrees of freedom
# Null hypothesis probability = 5.146485e-01
Photon flux (15-150 keV) in 960.8 sec: 1.97889E-02 ( -0.0045481 0.0045599 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46853e-07 ( -2.94006e-07 3.18761e-07 ) ergs/cm2
Band function
Time interval is from 879.000 sec. to 963.111 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.78546 ( 1.78211 1.78211 )
beta : -2.94938 ( 2.94651 0.646668 )
Epeak [keV] : 4.01491 ( -4.0141 149.264 )
Norm@50keV : 6.39982E-04 ( -0.000714222 170157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9822 for 55 degrees of freedom
# Null hypothesis probability = 5.120679e-01
Photon flux (15-150 keV) in 960.8 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] : 4.71005 (-1.14297 1.51008)
R^2/D10^2 : 0.211879 (-0.212078 0.614722)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.748774e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-07 2.212e-07
25- 50 2.177e-07 1.244e-07
50-150 6.573e-09 6.351e-09
15-150 6.117e-07 3.557e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.6257 (-7.2209 15.8692)
Norm : 0.295923 (-0.151178 0.388347)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.29 using 59 PHA bins.
# Reduced chi-squared = 0.9700 for 57 degrees of freedom
# Null hypothesis probability = 5.395626e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.703e-07 1.445e-07
25- 50 2.780e-07 1.438e-07
50-150 5.990e-08 5.228e-08
15-150 7.082e-07 3.221e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.22712 (-1.34761 1.39427)
R1^2/D10^2 : 0.333560 (-0.244205 0.896106)
kT2 [keV] : 36.1428 (-36.15 -36.1502)
R2^2/D10^2 : 5.11928E-05 (-5.05639e-05 0.0144327)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9536 for 55 degrees of freedom
# Null hypothesis probability = 5.726521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.874e-07 2.280e-07
25- 50 2.184e-07 1.166e-07
50-150 4.958e-07 3.121e-07
15-150 1.102e-06 5.714e-07
Plot creation:
Sun Jan 5 15:43:15 EST 2014