batgrbproduct Analysis for Trigger=575650
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 Oct 24 17:21:47 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger575650/GCN5_download_cron
======================================================================
Trigger: 00575650 Segment: 000
BAT Trigger Time: 404280904 [s; MET]
Trigger Stop: 404280968 [s; MET]
UTC: 2013-10-24T04:14:52.812200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.890634646078 Dec: -15.8224568476094 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.51
Flight Position: [ source = BAT ]
RA: 244.890634646078 Dec: -15.8224568476094 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.942268420412 Dec: -15.7242367727204 [deg; J2000]
{ 16h 19m 46.1s , -15d 43' 27.3" }
+/- 1.32444437348117 [arcmin] (estimated 90% radius based on SNR)
+/- 0.527779831719665 [arcmin] (formal 1-sigma fit error)
SNR: 20.3603148882456
Angular difference between Flight and Ground position is 6.604424 arcmin
Partial Coding Fraction: 0.734375 [ 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 1.319751 0.183396 0.056769 0.044398
0.056907 0.050915 0.043179 0.038094 [error]
Peak 1.319751 0.183396 0.056769 0.044398
0.056907 0.050915 0.043179 0.038094 [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 4.31e-07 8.07e-08 7.34e-09 7.24e-10 5.20e-07 5.20e-07 erg/cm2
Error 5.16e-08 2.39e-08 5.21e-09 1.04e-09 6.01e-08 6.01e-08 erg/cm2
Peak flux Power-law 2.35e-01 2.57e-02 1.17e-03 5.53e-05 2.62e-01 2.62e-01 ph/cm2/s
Error 2.90e-02 7.21e-03 8.05e-04 7.72e-05 3.00e-02 3.00e-02 ph/cm2/s
Fluence Cutoff-PL 4.37e-07 6.45e-08 8.88e-10 4.64e-13 5.03e-07 5.03e-07 erg/cm2
Error 5.37e-08 3.23e-08 6.42e-09 7.89e-10 6.07e-08 6.43e-08 erg/cm2
Peak flux Cutoff-PL 2.38e-01 2.13e-02 1.55e-04 4.25e-08 2.59e-01 2.59e-01 ph/cm2/s
Error 3.00e-02 1.01e-02 1.00e-03 5.84e-05 3.06e-02 3.06e-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 5.460 0.574 - - 1.09e-04 6.18e-05 39.170 57
CPL 1.000 0.000 50.0 0.0 2.21e-03 0.00e+00 184.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.460 0.574 - - 1.09e-04 6.18e-05 39.170 57
CPL 1.000 0.000 50.0 0.0 2.21e-03 0.00e+00 184.670 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
244.9423 -15.7242 0.0094 23.8 -56.2 2.0414 20.4 TRIG_00575650
------------------------------------------
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: 5.45953 ( -0.553288 0.594958 )
Norm@50keV : 1.08968E-04 ( -4.90393e-05 7.45003e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.17 using 59 PHA bins.
# Reduced chi-squared = 0.6872 for 57 degrees of freedom
# Null hypothesis probability = 9.656689e-01
Photon flux (15-150 keV) in 64 sec: 0.262274 ( -0.0299982 0.030017 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19788e-07 ( -5.99001e-08 6.02233e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.20667E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 184.67 using 59 PHA bins.
# Reduced chi-squared = 3.2976 for 56 degrees of freedom
# Null hypothesis probability = 1.189319e-15
Photon flux (15-150 keV) in 64 sec: 0.259127 ( -0.03063 0.030496 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.02732e-07 ( -6.04371e-08 6.08704e-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 : 1.23580 ( -3.25893 -1.22247 )
beta : -5.98548 ( 5.98155 1.01795 )
Epeak [keV] : 9.18208 ( -9.11356 2.85383 )
Norm@50keV : 62.3922 ( -59.1443 80903.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.72 using 59 PHA bins.
# Reduced chi-squared = 0.7040 for 55 degrees of freedom
# Null hypothesis probability = 9.529075e-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] : 2.73046 (-0.292331 0.336922)
R^2/D10^2 : 67.7487 (-37.9287 89.7994)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.94 using 59 PHA bins.
# Reduced chi-squared = 0.7007 for 57 degrees of freedom
# Null hypothesis probability = 9.580150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.408e-07 1.222e-07
25- 50 4.569e-08 1.612e-08
50-150 3.298e-11 3.076e-11
15-150 4.866e-07 1.350e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.09816 (-0.812936 1.04089)
Norm : 55.5847 (-26.756 55.5423)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.67 using 59 PHA bins.
# Reduced chi-squared = 0.6783 for 57 degrees of freedom
# Null hypothesis probability = 9.700646e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.395e-07 1.127e-07
25- 50 5.802e-08 2.088e-08
50-150 3.314e-10 2.944e-10
15-150 4.978e-07 1.406e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.66460 (-2.66403 0.34348)
R1^2/D10^2 : 79.4490 (-45.778 130.81)
kT2 [keV] : 21.2111 (-21.0332 -21.0332)
R2^2/D10^2 : 6.24415E-04 (-0.000641299 0.0235659)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.90 using 59 PHA bins.
# Reduced chi-squared = 0.6891 for 55 degrees of freedom
# Null hypothesis probability = 9.618991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.412e-07 1.687e-07
25- 50 5.886e-08 2.547e-08
50-150 5.873e-08 5.065e-08
15-150 5.588e-07 1.974e-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: 5.45953 ( -0.553288 0.594958 )
Norm@50keV : 1.08968E-04 ( -4.90393e-05 7.45003e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.17 using 59 PHA bins.
# Reduced chi-squared = 0.6872 for 57 degrees of freedom
# Null hypothesis probability = 9.656689e-01
Photon flux (15-150 keV) in 64 sec: 0.262274 ( -0.0299982 0.030017 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19788e-07 ( -5.99001e-08 6.02233e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.20667E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 184.67 using 59 PHA bins.
# Reduced chi-squared = 3.2976 for 56 degrees of freedom
# Null hypothesis probability = 1.189319e-15
Photon flux (15-150 keV) in 64 sec: 0.259127 ( -0.03063 0.030496 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.02732e-07 ( -6.04371e-08 6.08704e-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 : 1.23580 ( -3.25893 -1.22247 )
beta : -5.98548 ( 5.98155 1.01795 )
Epeak [keV] : 9.18208 ( -9.11356 3.6649 )
Norm@50keV : 62.3922 ( -59.1443 95161.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.72 using 59 PHA bins.
# Reduced chi-squared = 0.7040 for 55 degrees of freedom
# Null hypothesis probability = 9.529075e-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] : 2.73046 (-0.292331 0.336922)
R^2/D10^2 : 67.7487 (-37.9287 89.7994)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.94 using 59 PHA bins.
# Reduced chi-squared = 0.7007 for 57 degrees of freedom
# Null hypothesis probability = 9.580150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.408e-07 1.368e-07
25- 50 4.569e-08 1.694e-08
50-150 3.298e-11 2.893e-11
15-150 4.866e-07 1.811e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.09816 (-0.812936 1.04089)
Norm : 55.5847 (-26.756 55.5423)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.67 using 59 PHA bins.
# Reduced chi-squared = 0.6783 for 57 degrees of freedom
# Null hypothesis probability = 9.700646e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.395e-07 1.114e-07
25- 50 5.802e-08 2.069e-08
50-150 3.314e-10 2.849e-10
15-150 4.978e-07 1.303e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.66460 (-2.66403 0.34348)
R1^2/D10^2 : 79.4490 (-45.778 130.81)
kT2 [keV] : 21.2111 (-21.0332 -21.0332)
R2^2/D10^2 : 6.24415E-04 (-0.000641299 0.0261219)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.90 using 59 PHA bins.
# Reduced chi-squared = 0.6891 for 55 degrees of freedom
# Null hypothesis probability = 9.618991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.412e-07 1.952e-07
25- 50 5.886e-08 2.675e-08
50-150 5.873e-08 4.419e-08
15-150 5.588e-07 2.168e-07
Plot creation:
Thu Oct 24 17:38:08 EDT 2013