batgrbproduct Analysis for Trigger=510075
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): Wed Dec 21 12:42:18 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger510075/GCN5_download_cron
======================================================================
Trigger: 00510075 Segment: 000
BAT Trigger Time: 346126495.424 [s; MET]
Trigger Stop: 346126511.808 [s; MET]
UTC: 2011-12-21T02:14:47.726260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 91.1750457754977 Dec: -23.9790138138591 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.74
Image Trigger?: NO
Rate S/N Ratio: 16.3401346383682 [ if not an image trigger ]
Image S/N Ratio: 6.74
Flight Position: [ source = BAT ]
RA: 91.1750457754977 Dec: -23.9790138138591 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 91.1813715005106 Dec: -23.9351422159113 [deg; J2000]
{ 06h 04m 43.5s , -23d 56' 06.5" }
+/- 3.38790472067156 [arcmin] (estimated 90% radius based on SNR)
+/- 1.94145304406248 [arcmin] (formal 1-sigma fit error)
SNR: 5.32198720012495
Angular difference between Flight and Ground position is 2.655049 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 16.3840000033379 +/-
Measured from: 0
to: 16.3840000033379 [s; relative to TRIGTIME]
T50: 16.3840000033379 +/-
Measured from: 0
to: 16.3840000033379 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 16.3840000033379 second)
Measured from: 2.98023223876953e-08
to: 16.3840000331402 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 16.3840000033379 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.086744 0.112072 0.007850 0.003735
0.024145 0.023872 0.019991 0.017626 [error]
Peak 0.086744 0.112072 0.007850 0.003735
0.024145 0.023872 0.019991 0.017626 [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 2.46e-08 2.98e-08 2.61e-08 3.92e-08 9.43e-08 1.20e-07 erg/cm2
Error 9.47e-09 1.05e-08 1.55e-08 5.05e-08 3.84e-08 6.76e-08 erg/cm2
Peak flux Power-law 4.92e-02 3.30e-02 1.45e-02 8.72e-03 1.01e-01 1.05e-01 ph/cm2/s
Error 1.92e-02 1.14e-02 8.33e-03 1.06e-02 3.32e-02 3.51e-02 ph/cm2/s
Fluence Cutoff-PL 2.53e-08 4.22e-08 1.22e-09 7.48e-15 6.87e-08 6.86e-08 erg/cm2
Error 1.12e-08 1.74e-08 6.90e-09 1.48e-10 2.29e-08 2.29e-08 erg/cm2
Peak flux Cutoff-PL 4.72e-02 5.02e-02 8.52e-04 2.77e-09 9.83e-02 9.82e-02 ph/cm2/s
Error 2.18e-02 1.89e-02 4.32e-03 5.07e-05 3.00e-02 3.00e-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 2.196 0.579 - - 6.11e-04 2.79e-04 64.740 57
CPL -7.376 0.000 28.3 4.9 3.32e+03 0.00e+00 56.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.196 0.579 - - 6.11e-04 2.79e-04 64.740 57
CPL -7.376 0.000 28.3 4.9 3.32e+03 0.00e+00 56.650 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 16.384 0.000 16.384
T90 16.384 0.000 16.384
T50 16.384 0.000 16.384
Peak 16.384 0.000 16.384
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
91.1814 -23.9351 0.0363 18.3 39.0 0.2565 5.3 TRIG_00510075
------------------------------------------
Foreground time interval of the image:
0.000 16.384 (delta_t = 16.384 [sec])
Background time interval of the image:
-239.424 -39.424 (delta_t = 200.000 [sec])
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 16.384 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19596 ( -0.529418 0.629053 )
Norm@50keV : 6.11352E-04 ( -0.000275922 0.000281528 )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.246801e-01
Photon flux (15-150 keV) in 16.38 sec: 0.101019 ( -0.0331198 0.0332648 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.42576e-08 ( -3.65131e-08 4.03746e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.37646 ( )
Epeak [keV] : 28.2993 ( -4.35537 5.47298 )
Norm@50keV : 3315.88 ( )
------------------------------------------------------------
# Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.505552e-01
Photon flux (15-150 keV) in 16.38 sec: 9.82879E-02 ( -0.0291685 0.0307931 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.86859e-08 ( -2.09518e-08 2.4827e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97749 ( -96.8273 -86.8278 )
beta : -8.03872 ( 6.42569 16.1998 )
Epeak [keV] : 28.7688 ( -5.70947 5.38181 )
Norm@50keV : 63.2677 ( -63.2763 67.3939 )
------------------------------------------------------------
# Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Null hypothesis probability = 4.021742e-01
Photon flux (15-150 keV) in 16.38 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] : 7.42444 (-1.59723 2.11006)
R^2/D10^2 : 0.173823 (-0.173733 0.287149)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.116157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.669e-08 1.619e-08
25- 50 4.087e-08 2.652e-08
50-150 8.341e-09 7.424e-09
15-150 7.590e-08 4.731e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.1720 (-17.7422 55.7118)
Norm : 0.716000 (-0.315797 0.559968)
------------------------------------------------------------
# Chi-Squared = 62.60 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.843494e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.624e-08 1.373e-08
25- 50 3.341e-08 1.940e-08
50-150 2.381e-08 2.048e-08
15-150 8.345e-08 5.309e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.37111 (-7.39298 -7.39298)
R1^2/D10^2 : 0.124277 (-0.123734 -0.123734)
kT2 [keV] : 7.49879 (-7.43944 -7.43944)
R2^2/D10^2 : 5.10488E-02 (-0.0504463 -0.0504463)
------------------------------------------------------------
# Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 55 degrees of freedom
# Null hypothesis probability = 3.402118e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.676e-08 4.703e-02
25- 50 4.081e-08 4.649e-01
50-150 8.277e-09 9.509e+00
15-150 7.585e-08 1.025e+01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.19596 ( -0.529418 0.629053 )
Norm@50keV : 6.11352E-04 ( -0.000275922 0.000281528 )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.246801e-01
Photon flux (15-150 keV) in 16.38 sec: 0.101019 ( -0.0331198 0.0332648 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.42576e-08 ( -3.65131e-08 4.03746e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.37646 ( )
Epeak [keV] : 28.2993 ( -4.35537 5.47298 )
Norm@50keV : 3315.88 ( )
------------------------------------------------------------
# Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.505552e-01
Photon flux (15-150 keV) in 16.38 sec: 9.82879E-02 ( -0.0291685 0.0307931 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.86859e-08 ( -2.09518e-08 2.4827e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97749 ( -96.8276 -86.8278 )
beta : -8.03872 ( 6.42569 16.1998 )
Epeak [keV] : 28.7688 ( -5.70947 5.38181 )
Norm@50keV : 63.2677 ( -63.2763 67.5999 )
------------------------------------------------------------
# Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Null hypothesis probability = 4.021742e-01
Photon flux (15-150 keV) in 16.38 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] : 7.42444 (-1.59723 2.11006)
R^2/D10^2 : 0.173823 (-0.173733 0.287149)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.116157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.669e-08 1.575e-08
25- 50 4.087e-08 2.441e-08
50-150 8.341e-09 6.761e-09
15-150 7.590e-08 4.831e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.1720 (-17.7422 55.7118)
Norm : 0.716000 (-0.315797 0.559968)
------------------------------------------------------------
# Chi-Squared = 62.60 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.843494e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.624e-08 1.579e-08
25- 50 3.341e-08 1.969e-08
50-150 2.381e-08 1.994e-08
15-150 8.345e-08 5.613e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.37111 (-7.39298 -7.39298)
R1^2/D10^2 : 0.124277 (-0.123734 -0.123734)
kT2 [keV] : 7.49879 (-7.43944 -7.43944)
R2^2/D10^2 : 5.10488E-02 (-0.0504463 -0.0504463)
------------------------------------------------------------
# Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 55 degrees of freedom
# Null hypothesis probability = 3.402118e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.676e-08 5.371e-02
25- 50 4.081e-08 3.900e-01
50-150 8.277e-09 9.631e+00
15-150 7.585e-08 1.070e+01
Plot creation:
Wed Dec 21 13:00:30 EST 2011