batgrbproduct Analysis for Trigger=523489
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): Mon Jun 4 10:38:34 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger523489/GCN5_download_cron
======================================================================
Trigger: 00523489 Segment: 000
BAT Trigger Time: 360439736 [s; MET]
Trigger Stop: 360440056 [s; MET]
UTC: 2012-06-03T18:08:47.721700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 250.460198728634 Dec: -45.5043802794411 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.22
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.22
Flight Position: [ source = BAT ]
RA: 250.460198728634 Dec: -45.5043802794411 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 250.479393042647 Dec: -45.5402012680344 [deg; J2000]
{ 16h 41m 55.1s , -45d 32' 24.7" }
+/- 4.29174451923086 [arcmin] (estimated 90% radius based on SNR)
+/- 1.81651751102451 [arcmin] (formal 1-sigma fit error)
SNR: 3.79625800872383
Angular difference between Flight and Ground position is 2.295732 arcmin
Partial Coding Fraction: 0.828125 [ 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 0.671861 0.462057 -0.002255 -0.000256
0.124515 0.112111 0.094495 0.083287 [error]
Peak 0.671861 0.462057 -0.002255 -0.000256
0.124515 0.112111 0.094495 0.083287 [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 1.86e-07 1.62e-07 9.63e-08 8.62e-08 4.82e-07 5.31e-07 erg/cm2
Error 5.46e-08 5.46e-08 6.27e-08 1.18e-07 1.63e-07 2.22e-07 erg/cm2
Peak flux Power-law 1.93e-02 9.39e-03 2.79e-03 1.05e-03 3.21e-02 3.25e-02 ph/cm2/s
Error 5.76e-03 3.04e-03 1.76e-03 1.35e-03 8.57e-03 8.78e-03 ph/cm2/s
Fluence Cutoff-PL 1.84e-07 2.06e-07 1.40e-08 6.65e-12 4.03e-07 0.00e+00 erg/cm2
Error 6.48e-08 7.84e-08 4.03e-08 4.22e-09 1.14e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.82e-02 1.24e-02 4.83e-04 1.23e-07 3.11e-02 3.11e-02 ph/cm2/s
Error 6.83e-03 4.45e-03 1.24e-03 6.85e-05 8.17e-03 8.17e-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 2.749 0.593 - - 1.39e-04 6.82e-05 52.010 57
CPL -3.396 0.789 25.3 9.1 2.95e+00 0.00e+00 46.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.749 0.593 - - 1.39e-04 6.82e-05 52.010 57
CPL -3.396 0.789 25.3 9.1 2.95e+00 0.00e+00 46.840 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
250.4794 -45.5402 0.0507 20.7 35.3 1.2909 3.8 TRIG_00523489
------------------------------------------
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: 2.74878 ( -0.529068 0.656197 )
Norm@50keV : 1.39096E-04 ( -6.52677e-05 7.1228e-05 )
------------------------------------------------------------
# Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 57 degrees of freedom
# Null hypothesis probability = 6.623907e-01
Photon flux (15-150 keV) in 320 sec: 3.20712E-02 ( -0.00855391 0.00858197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8176e-07 ( -1.54821e-07 1.72076e-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: -3.39558 ( 2.09887 3.67697 )
Epeak [keV] : 25.3292 ( -12.5229 5.68989 )
Norm@50keV : 2.95065 ( )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.033555e-01
Photon flux (15-150 keV) in 320 sec: 3.11204E-02 ( -0.0081575 0.0081879 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03235e-07 ( -1.08692e-07 1.19952e-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 : 3.26212 ( -4.26336 -2.77746 )
beta : -8.83808 ( 6.85623 16.7976 )
Epeak [keV] : 25.2732 ( -4.44668 4.99843 )
Norm@50keV : 2.37539 ( -2.38804 14.3869 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8514 for 55 degrees of freedom
# Null hypothesis probability = 7.754535e-01
Photon flux (15-150 keV) in 320 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] : 6.21362 (-1.25112 1.5136)
R^2/D10^2 : 0.109293 (-0.0674005 0.183084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8249 for 57 degrees of freedom
# Null hypothesis probability = 8.243742e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 1.092e-07
25- 50 2.025e-07 1.226e-07
50-150 2.136e-08 1.755e-08
15-150 4.122e-07 2.450e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7073 (-8.40144 16.25)
Norm : 0.364441 (-0.1615 0.317092)
------------------------------------------------------------
# Chi-Squared = 49.36 using 59 PHA bins.
# Reduced chi-squared = 0.8659 for 57 degrees of freedom
# Null hypothesis probability = 7.541246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.933e-07 8.493e-08
25- 50 1.799e-07 1.019e-07
50-150 6.163e-08 5.058e-08
15-150 4.348e-07 2.205e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.28963 (-6.26998 85.9291)
R1^2/D10^2 : 7.63934E-02 (-0.0769343 -0.0769343)
kT2 [keV] : 6.11466 (-6.1583 -6.1583)
R2^2/D10^2 : 3.08597E-02 (-0.0317889 -0.0317889)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8550 for 55 degrees of freedom
# Null hypothesis probability = 7.692675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.875e-07 3.341e-01
25- 50 2.036e-07 2.819e+00
50-150 2.191e-08 7.187e+01
15-150 4.129e-07 7.038e+01
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: 2.74878 ( -0.529068 0.656197 )
Norm@50keV : 1.39096E-04 ( -6.52677e-05 7.1228e-05 )
------------------------------------------------------------
# Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9124 for 57 degrees of freedom
# Null hypothesis probability = 6.623907e-01
Photon flux (15-150 keV) in 320 sec: 3.20712E-02 ( -0.00855391 0.00858197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8176e-07 ( -1.54821e-07 1.72076e-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: -3.39558 ( 2.09887 3.67697 )
Epeak [keV] : 25.3292 ( -12.5229 5.68989 )
Norm@50keV : 2.95065 ( )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 56 degrees of freedom
# Null hypothesis probability = 8.033555e-01
Photon flux (15-150 keV) in 320 sec: 3.11204E-02 ( -0.0081575 0.0081879 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03235e-07 ( -1.08692e-07 1.19952e-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 : 3.26212 ( -4.26336 -2.77746 )
beta : -8.83808 ( 6.85623 16.7976 )
Epeak [keV] : 25.2732 ( -4.44668 4.99843 )
Norm@50keV : 2.37539 ( -2.38804 14.3869 )
------------------------------------------------------------
# Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8514 for 55 degrees of freedom
# Null hypothesis probability = 7.754535e-01
Photon flux (15-150 keV) in 320 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] : 6.21362 (-1.25112 1.5136)
R^2/D10^2 : 0.109293 (-0.0674005 0.183084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8249 for 57 degrees of freedom
# Null hypothesis probability = 8.243742e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 1.127e-07
25- 50 2.025e-07 1.232e-07
50-150 2.136e-08 1.745e-08
15-150 4.122e-07 2.329e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7073 (-8.40144 16.25)
Norm : 0.364441 (-0.1615 0.317092)
------------------------------------------------------------
# Chi-Squared = 49.36 using 59 PHA bins.
# Reduced chi-squared = 0.8659 for 57 degrees of freedom
# Null hypothesis probability = 7.541246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.933e-07 8.222e-08
25- 50 1.799e-07 1.020e-07
50-150 6.163e-08 5.301e-08
15-150 4.348e-07 2.182e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.28963 (-6.26998 85.9291)
R1^2/D10^2 : 7.63934E-02 (-0.0769343 -0.0769343)
kT2 [keV] : 6.11466 (-6.1583 -6.1583)
R2^2/D10^2 : 3.08597E-02 (-0.0317889 -0.0317889)
------------------------------------------------------------
# Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8550 for 55 degrees of freedom
# Null hypothesis probability = 7.692675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.875e-07 3.158e-01
25- 50 2.036e-07 2.565e+00
50-150 2.191e-08 6.826e+01
15-150 4.129e-07 7.554e+01
Plot creation:
Mon Jun 4 10:59:26 EDT 2012