batgrbproduct Analysis for Trigger=524642
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): Tue Jun 19 17:29:19 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger524642/GCN5_download_cron
======================================================================
Trigger: 00524642 Segment: 000
BAT Trigger Time: 361739216 [s; MET]
Trigger Stop: 361740816 [s; MET]
UTC: 2012-06-18T19:06:47.667800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 287.576758651454 Dec: -5.80659154235989 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.28
Flight Position: [ source = BAT ]
RA: 287.576758651454 Dec: -5.80659154235989 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 287.590783782369 Dec: -5.73198912667499 [deg; J2000]
{ 19h 10m 21.8s , -05d 43' 55.2" }
+/- 5.35181766460436 [arcmin] (estimated 90% radius based on SNR)
+/- 3.76687335863582 [arcmin] (formal 1-sigma fit error)
SNR: 2.76950545389886
Angular difference between Flight and Ground position is 4.553774 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1600 +/-
Measured from: 0
to: 1600 [s; relative to TRIGTIME]
T50: 1600 +/-
Measured from: 0
to: 1600 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1600 second)
Measured from: 0
to: 1600 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1600 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.882373 0.637354 0.173181 0.008157
0.153991 0.152484 0.137361 0.136225 [error]
Peak 0.882373 0.637354 0.173181 0.008157
0.153991 0.152484 0.137361 0.136225 [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 2.54e-07 2.47e-07 1.68e-07 1.79e-07 7.42e-07 8.49e-07 erg/cm2
Error 6.46e-08 7.26e-08 9.82e-08 2.26e-07 2.37e-07 3.58e-07 erg/cm2
Peak flux Power-law 1.17e-02 6.37e-03 2.17e-03 9.57e-04 2.08e-02 2.12e-02 ph/cm2/s
Error 3.04e-03 1.79e-03 1.22e-03 1.14e-03 4.79e-03 5.02e-03 ph/cm2/s
Fluence Cutoff-PL 2.55e-07 2.77e-07 9.83e-08 8.18e-09 6.38e-07 0.00e+00 erg/cm2
Error 6.87e-08 9.29e-08 1.41e-07 1.98e-07 3.57e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.16e-02 7.18e-03 1.36e-03 6.10e-05 2.02e-02 2.02e-02 ph/cm2/s
Error 3.23e-03 2.33e-03 1.61e-03 9.64e-04 4.65e-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 2.557 0.537 - - 1.02e-04 4.44e-05 58.610 57
CPL 0.992 0.000 19.7 0.0 1.24e-03 0.00e+00 57.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.557 0.537 - - 1.02e-04 4.44e-05 58.610 57
CPL 0.992 0.000 19.7 0.0 1.24e-03 0.00e+00 57.620 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 1600.000 0.000 1600.000
T90 1600.000 0.000 1600.000
T50 1600.000 0.000 1600.000
Peak 1600.000 0.000 1600.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.5908 -5.7320 0.0692 7.4 19.3 1.4486 2.8 TRIG_00524642
------------------------------------------
Foreground time interval of the image:
247.000 705.020 (delta_t = 458.020 [sec])
706.000 963.105 (delta_t = 257.105 [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
247.000000 705.020000
706.000000 963.104800
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55659 ( -0.480568 0.593439 )
Norm@50keV : 1.02133E-04 ( -4.3349e-05 4.53865e-05 )
------------------------------------------------------------
# Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.161495e-01
Photon flux (15-150 keV) in 715.1 sec: 2.07800E-02 ( -0.00477831 0.00480028 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42009e-07 ( -2.2286e-07 2.50206e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
247.000000 705.020000
706.000000 963.104800
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.992005 ( )
Epeak [keV] : 19.6537 ( )
Norm@50keV : 1.23890E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.62 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.150090e-01
Photon flux (15-150 keV) in 715.1 sec: 2.02224E-02 ( -0.0045671 0.0047369 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.3848e-07 ( -1.85517e-07 5.28256e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
247.000000 705.020000
706.000000 963.104800
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89007 ( -19.3547 -19.3547 )
beta : -2.94008 ( -1.4582 0.695988 )
Epeak [keV] : 20.1444 ( -20.1444 4.98157 )
Norm@50keV : 102.898 ( -102.898 32.9229 )
------------------------------------------------------------
# Chi-Squared = 57.30 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 55 degrees of freedom
# Null hypothesis probability = 3.898781e-01
Photon flux (15-150 keV) in 715.1 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] : 6.40288 (-1.49153 1.81728)
R^2/D10^2 : 5.85554E-02 (-0.0378824 0.122439)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 59.05 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.005349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.490e-07 1.424e-07
25- 50 2.851e-07 1.489e-07
50-150 3.383e-08 2.779e-08
15-150 5.679e-07 2.461e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.3457 (-10.8391 22.3476)
Norm : 0.189258 (-0.0752644 0.147647)
------------------------------------------------------------
# Chi-Squared = 57.66 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.507556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.562e-07 9.010e-08
25- 50 2.714e-07 1.157e-07
50-150 1.245e-07 1.006e-07
15-150 6.520e-07 2.686e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.82149 (-3.75061 3.94563)
R1^2/D10^2 : 0.308769 (-0.320398 -0.320398)
kT2 [keV] : 9.41133 (-9.29703 -9.29703)
R2^2/D10^2 : 7.79612E-03 (-0.00829566 0.108341)
------------------------------------------------------------
# Chi-Squared = 57.42 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 55 degrees of freedom
# Null hypothesis probability = 3.855350e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.585e-07 1.425e-07
25- 50 2.742e-07 1.530e-07
50-150 9.808e-08 6.150e-08
15-150 6.308e-07 3.518e-07
Peak spectrum fit
Power-law model
Time interval is from 706.000 sec. to 963.105 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55659 ( -0.480568 0.593439 )
Norm@50keV : 1.02133E-04 ( -4.3349e-05 4.53865e-05 )
------------------------------------------------------------
# Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.161495e-01
Photon flux (15-150 keV) in 715.1 sec: 2.07800E-02 ( -0.00477831 0.00480028 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42009e-07 ( -2.2286e-07 2.50206e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 706.000 sec. to 963.105 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.992005 ( )
Epeak [keV] : 19.6537 ( )
Norm@50keV : 1.23890E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.62 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.150090e-01
Photon flux (15-150 keV) in 715.1 sec: 2.02224E-02 ( -0.0045671 0.0047369 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.3848e-07 ( -1.85517e-07 5.28256e-07 ) ergs/cm2
Band function
Time interval is from 706.000 sec. to 963.105 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89007 ( -19.3547 -19.3547 )
beta : -2.94008 ( -1.4582 0.695988 )
Epeak [keV] : 20.1444 ( -20.1444 4.98157 )
Norm@50keV : 102.898 ( -102.898 32.9229 )
------------------------------------------------------------
# Chi-Squared = 57.30 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 55 degrees of freedom
# Null hypothesis probability = 3.898781e-01
Photon flux (15-150 keV) in 715.1 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] : 6.40288 (-1.49153 1.81728)
R^2/D10^2 : 5.85554E-02 (-0.0378824 0.122439)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 59.05 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.005349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.490e-07 1.332e-07
25- 50 2.851e-07 1.513e-07
50-150 3.383e-08 2.693e-08
15-150 5.679e-07 2.699e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.3457 (-10.8391 22.3476)
Norm : 0.189258 (-0.0752644 0.147647)
------------------------------------------------------------
# Chi-Squared = 57.66 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.507556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.562e-07 8.703e-08
25- 50 2.714e-07 1.304e-07
50-150 1.245e-07 9.547e-08
15-150 6.520e-07 2.844e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.82149 (-3.75061 3.94563)
R1^2/D10^2 : 0.308769 (-0.320398 -0.320398)
kT2 [keV] : 9.41133 (-9.29703 -9.29703)
R2^2/D10^2 : 7.79612E-03 (-0.00829566 0.108341)
------------------------------------------------------------
# Chi-Squared = 57.42 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 55 degrees of freedom
# Null hypothesis probability = 3.855350e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.585e-07 1.377e-07
25- 50 2.742e-07 1.575e-07
50-150 9.808e-08 6.153e-08
15-150 6.308e-07 3.213e-07
Plot creation:
Tue Jun 19 17:41:11 EDT 2012