batgrbproduct Analysis for Trigger=530441
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 Aug 9 21:52:51 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger530441/GCN5_download_cron
======================================================================
Trigger: 00530441 Segment: 000
BAT Trigger Time: 366185704 [s; MET]
Trigger Stop: 366185768 [s; MET]
UTC: 2012-08-09T06:14:54.482640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 246.932337752063 Dec: -48.5407496109497 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.43
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.43
Flight Position: [ source = BAT ]
RA: 246.932337752063 Dec: -48.5407496109497 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 246.960807992612 Dec: -48.6180488077812 [deg; J2000]
{ 16h 27m 50.6s , -48d 37' 05.0" }
+/- 4.1635863772764 [arcmin] (estimated 90% radius based on SNR)
+/- 3.21979187692901 [arcmin] (formal 1-sigma fit error)
SNR: 3.96428341751441
Angular difference between Flight and Ground position is 4.773654 arcmin
Partial Coding Fraction: 0.71875 [ 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 0.308186 0.175660 0.007235 -0.008578
0.055248 0.049763 0.042533 0.037572 [error]
Peak 0.308186 0.175660 0.007235 -0.008578
0.055248 0.049763 0.042533 0.037572 [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 8.80e-08 7.15e-08 3.93e-08 3.17e-08 2.13e-07 2.30e-07 erg/cm2
Error 2.66e-08 2.64e-08 2.93e-08 4.95e-08 7.57e-08 1.00e-07 erg/cm2
Peak flux Power-law 4.61e-02 2.10e-02 5.77e-03 1.98e-03 7.40e-02 7.49e-02 ph/cm2/s
Error 1.42e-02 7.45e-03 4.16e-03 2.88e-03 2.02e-02 2.07e-02 ph/cm2/s
Fluence Cutoff-PL 8.75e-08 7.95e-08 2.41e-08 1.83e-09 1.93e-07 0.00e+00 erg/cm2
Error 2.83e-08 3.26e-08 3.38e-08 4.20e-08 9.72e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.53e-02 2.36e-02 3.77e-03 1.54e-04 7.27e-02 7.28e-02 ph/cm2/s
Error 1.52e-02 9.42e-03 4.88e-03 2.40e-03 1.97e-02 1.99e-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 2.863 0.693 - - 2.97e-04 1.66e-04 53.930 57
CPL 1.375 0.000 12.9 0.0 3.15e-03 0.00e+00 53.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.863 0.693 - - 2.97e-04 1.66e-04 53.930 57
CPL 1.375 0.000 12.9 0.0 3.15e-03 0.00e+00 53.160 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
246.9608 -48.6180 0.0483 27.3 -137.9 0.4331 4.0 TRIG_00530441
------------------------------------------
Foreground time interval of the image:
0.000 8.350 (delta_t = 8.350 [sec])
9.000 64.000 (delta_t = 55.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 8.350000
9.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.86341 ( -0.598364 0.787743 )
Norm@50keV : 2.96786E-04 ( -0.000157375 0.000173736 )
------------------------------------------------------------
# Chi-Squared = 53.93 using 59 PHA bins.
# Reduced chi-squared = 0.9461 for 57 degrees of freedom
# Null hypothesis probability = 5.909919e-01
Photon flux (15-150 keV) in 63.35 sec: 7.40376E-02 ( -0.0202203 0.0202728 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12846e-07 ( -7.13473e-08 8.00155e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 8.350000
9.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37485 ( )
Epeak [keV] : 12.8770 ( )
Norm@50keV : 3.15450E-03 ( )
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9493 for 56 degrees of freedom
# Null hypothesis probability = 5.831198e-01
Photon flux (15-150 keV) in 63.35 sec: 7.27386E-02 ( -0.0197384 0.0196465 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92893e-07 ( -6.21356e-08 1.32294e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 8.350000
9.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38602 ( 1.38602 1.38602 )
beta : -9.37166 ( 9.99998 20 )
Epeak [keV] : 12.7850 ( -5.76768 14.1169 )
Norm@50keV : 3.08648E-03 ( -0.00308725 945996 )
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9665 for 55 degrees of freedom
# Null hypothesis probability = 5.452920e-01
Photon flux (15-150 keV) in 63.35 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] : 5.81763 (-1.73196 2.28103)
R^2/D10^2 : 0.311102 (-0.309403 1.26346)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.622866e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.467e-08 5.014e-08
25- 50 7.889e-08 4.849e-08
50-150 6.355e-09 5.372e-09
15-150 1.699e-07 1.032e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.0021 (-9.48291 19.2394)
Norm : 0.855145 (-0.416586 1.01155)
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9326 for 57 degrees of freedom
# Null hypothesis probability = 6.199597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.747e-08 4.302e-08
25- 50 7.949e-08 4.617e-08
50-150 2.582e-08 2.254e-08
15-150 1.928e-07 1.051e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.51642 (-3.51476 1.7374)
R1^2/D10^2 : 2.01315 (-2.01713 -2.01713)
kT2 [keV] : 9.24371 (-9.23934 -9.23934)
R2^2/D10^2 : 2.71654E-02 (-0.0272347 0.677799)
------------------------------------------------------------
# Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9586 for 55 degrees of freedom
# Null hypothesis probability = 5.620249e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.895e-08 4.501e-08
25- 50 7.900e-08 4.530e-08
50-150 2.666e-08 1.872e-08
15-150 1.946e-07 1.040e-07
Peak spectrum fit
Power-law model
Time interval is from 9.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.86341 ( -0.598364 0.787743 )
Norm@50keV : 2.96786E-04 ( -0.000157375 0.000173736 )
------------------------------------------------------------
# Chi-Squared = 53.93 using 59 PHA bins.
# Reduced chi-squared = 0.9461 for 57 degrees of freedom
# Null hypothesis probability = 5.909919e-01
Photon flux (15-150 keV) in 63.35 sec: 7.40376E-02 ( -0.0202203 0.0202728 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12846e-07 ( -7.13473e-08 8.00155e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37485 ( )
Epeak [keV] : 12.8770 ( )
Norm@50keV : 3.15450E-03 ( )
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9493 for 56 degrees of freedom
# Null hypothesis probability = 5.831198e-01
Photon flux (15-150 keV) in 63.35 sec: 7.27386E-02 ( -0.0197384 0.0196465 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92893e-07 ( -6.21356e-08 1.32294e-07 ) ergs/cm2
Band function
Time interval is from 9.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38602 ( 1.38602 1.38602 )
beta : -9.37166 ( 9.99998 20 )
Epeak [keV] : 12.7850 ( -5.76768 14.1169 )
Norm@50keV : 3.08648E-03 ( -0.00308725 963985 )
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9665 for 55 degrees of freedom
# Null hypothesis probability = 5.452920e-01
Photon flux (15-150 keV) in 63.35 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] : 5.81763 (-1.73196 2.28103)
R^2/D10^2 : 0.311102 (-0.309403 1.26346)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.622866e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.467e-08 4.970e-08
25- 50 7.889e-08 4.694e-08
50-150 6.355e-09 5.518e-09
15-150 1.699e-07 9.902e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.0021 (-9.48291 19.2394)
Norm : 0.855145 (-0.416586 1.01155)
------------------------------------------------------------
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9326 for 57 degrees of freedom
# Null hypothesis probability = 6.199597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.747e-08 4.387e-08
25- 50 7.949e-08 4.175e-08
50-150 2.582e-08 2.247e-08
15-150 1.928e-07 1.035e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.51642 (-3.51476 1.7374)
R1^2/D10^2 : 2.01315 (-2.01713 -2.01713)
kT2 [keV] : 9.24371 (-9.23934 -9.23934)
R2^2/D10^2 : 2.71654E-02 (-0.0272347 0.677799)
------------------------------------------------------------
# Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9586 for 55 degrees of freedom
# Null hypothesis probability = 5.620249e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.895e-08 4.824e-08
25- 50 7.900e-08 4.197e-08
50-150 2.666e-08 1.732e-08
15-150 1.946e-07 1.036e-07
Plot creation:
Thu Aug 9 22:33:38 EDT 2012