batgrbproduct Analysis for Trigger=646423
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 Jun 26 14:55:42 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger646423/GCN5_download_cron
======================================================================
Trigger: 00646423 Segment: 000
BAT Trigger Time: 456934568 [s; MET]
Trigger Stop: 456934888 [s; MET]
UTC: 2015-06-25T14:15:54.233340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 209.511563841611 Dec: -64.7342105267556 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.5
Flight Position: [ source = BAT ]
RA: 209.511563841611 Dec: -64.7342105267556 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 209.511197305145 Dec: -64.7100770176338 [deg; J2000]
{ 13h 58m 02.7s , -64d 42' 36.3" }
+/- 2.95559977570546 [arcmin] (estimated 90% radius based on SNR)
+/- 1.44863619122139 [arcmin] (formal 1-sigma fit error)
SNR: 6.46796240982261
Angular difference between Flight and Ground position is 1.448041 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.462739 0.734791 0.450828 0.126494
0.101404 0.102648 0.091133 0.087110 [error]
Peak 0.462739 0.734791 0.450828 0.126494
0.101404 0.102648 0.091133 0.087110 [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 1.48e-07 2.72e-07 3.85e-07 1.15e-06 1.10e-06 1.95e-06 erg/cm2
Error 3.84e-08 4.55e-08 8.69e-08 5.41e-07 2.11e-07 6.17e-07 erg/cm2
Peak flux Power-law 1.49e-02 1.50e-02 1.06e-02 1.19e-02 4.52e-02 5.25e-02 ph/cm2/s
Error 3.94e-03 2.55e-03 2.32e-03 5.22e-03 7.45e-03 8.96e-03 ph/cm2/s
Fluence Cutoff-PL 1.26e-07 3.11e-07 3.89e-07 2.29e-07 9.79e-07 1.06e-06 erg/cm2
Error 4.61e-08 6.25e-08 1.03e-07 6.29e-07 2.31e-07 5.35e-07 erg/cm2
Peak flux Cutoff-PL 1.25e-02 1.69e-02 1.10e-02 3.31e-03 4.30e-02 4.38e-02 ph/cm2/s
Error 4.75e-03 3.37e-03 2.74e-03 4.14e-03 7.82e-03 9.75e-03 ph/cm2/s
Fluence Band 1.00e-07 3.26e-07 4.18e-07 3.19e-07 1.00e-06 1.17e-06 erg/cm2
Error -------- -------- -------- 6.61e-07 -------- -------- 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 1.499 0.279 - - 3.62e-04 6.27e-05 55.440 57
CPL 0.284 1.496 64.9 -23.9 1.62e-03 6.29e-03 52.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.499 0.279 - - 3.62e-04 6.27e-05 55.440 57
CPL 0.284 1.496 64.9 -23.9 1.62e-03 6.29e-03 52.840 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
209.5112 -64.7101 0.0297 17.5 -95.2 1.6633 6.5 TRIG_00646423
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49920 ( -0.276643 0.281488 )
Norm@50keV : 3.62459E-04 ( -6.31001e-05 6.23113e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 57 degrees of freedom
# Null hypothesis probability = 5.337076e-01
Photon flux (15-150 keV) in 320 sec: 4.52394E-02 ( -0.00744797 0.00745375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10045e-06 ( -2.08294e-07 2.13739e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.283599 ( -1.7225 1.26977 )
Epeak [keV] : 64.9425 ( -17.1368 -64.9424 )
Norm@50keV : 1.62376E-03 ( -0.00162376 0.0109603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.84 using 59 PHA bins.
# Reduced chi-squared = 0.9436 for 56 degrees of freedom
# Null hypothesis probability = 5.951284e-01
Photon flux (15-150 keV) in 320 sec: 4.29970E-02 ( -0.0078199 0.0078283 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.79434e-07 ( -2.17578e-07 2.44832e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93504 ( -4.93504 -4.93504 )
beta : -1.69200 ( -0.393154 0.341768 )
Epeak [keV] : 27.1977 ( -27.1977 7.22658 )
Norm@50keV : 21.6545 ( -3.5056 172322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.22 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 55 degrees of freedom
# Null hypothesis probability = 5.428632e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.99907e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0043 (-2.3242 2.87286)
R^2/D10^2 : 6.72181E-03 (-0.00326445 0.00607222)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.58 using 59 PHA bins.
# Reduced chi-squared = 0.9750 for 57 degrees of freedom
# Null hypothesis probability = 5.286239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.911e-08 2.784e-08
25- 50 3.315e-07 1.036e-07
50-150 4.282e-07 1.456e-07
15-150 8.488e-07 2.082e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.215 (-107.279 -199.238)
Norm : 0.185665 (-0.0301955 0.0345418)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.32 using 59 PHA bins.
# Reduced chi-squared = 0.9530 for 57 degrees of freedom
# Null hypothesis probability = 5.761944e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.480e-07 8.454e-08
25- 50 2.846e-07 1.591e-07
50-150 6.240e-07 3.531e-07
15-150 1.057e-06 6.053e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.06013 (-3.17643 -5.05998)
R1^2/D10^2 : 9.41386E-02 (-0.0898026 10.4833)
kT2 [keV] : 16.9822 (-3.89341 -16.9806)
R2^2/D10^2 : 2.98604E-03 (-0.00292183 0.00521156)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.21 using 59 PHA bins.
# Reduced chi-squared = 0.9492 for 55 degrees of freedom
# Null hypothesis probability = 5.819591e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.330e-07 7.622e-08
25- 50 2.999e-07 1.619e-07
50-150 5.131e-07 3.115e-07
15-150 9.459e-07 5.069e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49920 ( -0.276643 0.281488 )
Norm@50keV : 3.62459E-04 ( -6.31001e-05 6.23113e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 57 degrees of freedom
# Null hypothesis probability = 5.337076e-01
Photon flux (15-150 keV) in 320 sec: 4.52394E-02 ( -0.00744797 0.00745375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10045e-06 ( -2.08294e-07 2.13739e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.283599 ( -1.7225 1.26977 )
Epeak [keV] : 64.9425 ( -17.1368 -64.9424 )
Norm@50keV : 1.62376E-03 ( -0.00162376 0.0109603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.84 using 59 PHA bins.
# Reduced chi-squared = 0.9436 for 56 degrees of freedom
# Null hypothesis probability = 5.951284e-01
Photon flux (15-150 keV) in 320 sec: 4.29970E-02 ( -0.0078199 0.0078283 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.79434e-07 ( -2.17578e-07 2.44832e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93504 ( -4.93504 -4.93504 )
beta : -1.69200 ( -0.393154 0.341768 )
Epeak [keV] : 27.1977 ( -27.1977 7.22658 )
Norm@50keV : 21.6545 ( -3.5056 172322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.22 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 55 degrees of freedom
# Null hypothesis probability = 5.428632e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.99907e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0043 (-2.3242 2.87286)
R^2/D10^2 : 6.72181E-03 (-0.00326445 0.00607222)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.58 using 59 PHA bins.
# Reduced chi-squared = 0.9750 for 57 degrees of freedom
# Null hypothesis probability = 5.286239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.911e-08 2.971e-08
25- 50 3.315e-07 9.123e-08
50-150 4.282e-07 1.528e-07
15-150 8.488e-07 2.410e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.215 (-107.279 -199.238)
Norm : 0.185665 (-0.0301955 0.0345418)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.32 using 59 PHA bins.
# Reduced chi-squared = 0.9530 for 57 degrees of freedom
# Null hypothesis probability = 5.761944e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.480e-07 8.480e-08
25- 50 2.846e-07 1.603e-07
50-150 6.240e-07 3.502e-07
15-150 1.057e-06 5.936e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.06013 (-3.17643 -5.05998)
R1^2/D10^2 : 9.41386E-02 (-0.0898026 10.4833)
kT2 [keV] : 16.9822 (-3.89341 -16.9806)
R2^2/D10^2 : 2.98604E-03 (-0.00292183 0.00521156)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.21 using 59 PHA bins.
# Reduced chi-squared = 0.9492 for 55 degrees of freedom
# Null hypothesis probability = 5.819591e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.330e-07 6.842e-08
25- 50 2.999e-07 1.590e-07
50-150 5.131e-07 3.042e-07
15-150 9.459e-07 4.978e-07
Plot creation:
Fri Jun 26 15:00:17 EDT 2015