batgrbproduct Analysis for Trigger=519207
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 Apr 3 07:53:53 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger519207/GCN5_download_cron
======================================================================
Trigger: 00519207 Segment: 000
BAT Trigger Time: 355099770.944 [s; MET]
Trigger Stop: 355099772.992 [s; MET]
UTC: 2012-04-02T22:49:22.884260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 314.326034146859 Dec: 19.257856995811 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.63
Image Trigger?: NO
Rate S/N Ratio: 13.076696830622 [ if not an image trigger ]
Image S/N Ratio: 6.63
Flight Position: [ source = BAT ]
RA: 314.326034146859 Dec: 19.257856995811 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 314.362235109033 Dec: 19.2961252653304 [deg; J2000]
{ 20h 57m 26.9s , +19d 17' 46.1" }
+/- 3.57398620097738 [arcmin] (estimated 90% radius based on SNR)
+/- 2.28787841407426 [arcmin] (formal 1-sigma fit error)
SNR: 4.93060250824144
Angular difference between Flight and Ground position is 3.078262 arcmin
Partial Coding Fraction: 0.4179688 [ including projection effects ]
Duration
T90: 2.04799997806549 +/-
Measured from: 0
to: 2.04799997806549 [s; relative to TRIGTIME]
T50: 2.04799997806549 +/-
Measured from: 0
to: 2.04799997806549 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 2.04799997806549 second)
Measured from: 0
to: 2.04799997806549 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 2.04799997806549 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.048346 0.055745 0.012168 0.006704
0.013166 0.013126 0.011004 0.009045 [error]
Peak 0.048346 0.055745 0.012168 0.006704
0.013166 0.013126 0.011004 0.009045 [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 1.33e-08 1.90e-08 2.01e-08 3.93e-08 6.46e-08 9.15e-08 erg/cm2
Error 5.58e-09 6.00e-09 9.52e-09 4.40e-08 2.34e-08 4.84e-08 erg/cm2
Peak flux Power-law 2.11e-01 1.66e-01 8.80e-02 6.76e-02 4.96e-01 5.33e-01 ph/cm2/s
Error 9.01e-02 5.25e-02 4.05e-02 5.90e-02 1.57e-01 1.69e-01 ph/cm2/s
Fluence Cutoff-PL 1.27e-08 2.87e-08 1.63e-09 5.81e-14 4.31e-08 0.00e+00 erg/cm2
Error 6.40e-09 9.78e-09 5.32e-09 1.35e-10 1.36e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.89e-01 2.66e-01 8.98e-03 1.70e-07 4.64e-01 4.64e-01 ph/cm2/s
Error 9.87e-02 8.41e-02 2.65e-02 3.69e-04 1.40e-01 1.40e-01 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 1.917 0.516 - - 3.43e-03 1.26e-03 59.870 57
CPL -7.794 0.000 30.3 5.2 1.61e+04 0.00e+00 51.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.917 0.516 - - 3.43e-03 1.26e-03 59.870 57
CPL -7.794 0.000 30.3 5.2 1.61e+04 0.00e+00 51.810 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 2.048 0.000 2.048
T90 2.048 0.000 2.048
T50 2.048 0.000 2.048
Peak 2.048 0.000 2.048
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
314.3622 +19.2961 0.0393 32.0 -112.1 0.1212 4.9 TRIG_00519207
------------------------------------------
Foreground time interval of the image:
0.000 2.048 (delta_t = 2.048 [sec])
Background time interval of the image:
-120.743 -10.944 (delta_t = 109.799 [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 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91684 ( -0.499018 0.533794 )
Norm@50keV : 3.43416E-03 ( -0.00127284 0.00125075 )
------------------------------------------------------------
# Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.721041e-01
Photon flux (15-150 keV) in 2.048 sec: 0.496433 ( -0.156833 0.157142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4639e-08 ( -2.2759e-08 2.4072e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.79432 ( )
Epeak [keV] : 30.2983 ( -4.35833 5.98734 )
Norm@50keV : 1.61342E+04 ( )
------------------------------------------------------------
# Chi-Squared = 51.81 using 59 PHA bins.
# Reduced chi-squared = 0.9253 for 56 degrees of freedom
# Null hypothesis probability = 6.339420e-01
Photon flux (15-150 keV) in 2.048 sec: 0.463741 ( -0.137031 0.143022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30842e-08 ( -1.28166e-08 1.44763e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99982 ( -10483.1 -10468.1 )
beta : -4.14741 ( 4.16171 1.97486 )
Epeak [keV] : 30.7016 ( -6.75632 5.70786 )
Norm@50keV : 198.882 ( -197.808 723.997 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.024958e-01
Photon flux (15-150 keV) in 2.048 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] : 8.27935 (-1.74845 2.47612)
R^2/D10^2 : 0.546363 (-0.546365 0.86451)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731084e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.421e-08 8.471e-09
25- 50 2.638e-08 1.474e-08
50-150 7.744e-09 6.191e-09
15-150 4.833e-08 2.891e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.1247 (-30.0204 -57.1263)
Norm : 2.75628 (-1.13176 1.86425)
------------------------------------------------------------
# Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.252011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-08 7.847e-09
25- 50 2.108e-08 1.272e-08
50-150 2.302e-08 1.822e-08
15-150 5.817e-08 3.808e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.984 ( )
R1^2/D10^2 : 3.23844E-05 (-3.24065e-05 4.73891e-05)
kT2 [keV] : 7.91251 (-1.67816 2.33353)
R2^2/D10^2 : 0.628056 (-0.411129 1.00529)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 55 degrees of freedom
# Reduced chi-squared = 0.9666 for 55 degrees of freedom
# Null hypothesis probability = 4.973256e-01
# Null hypothesis probability = 5.451585e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-08 7.806e-03
25- 50 2.639e-08 6.506e-02
50-150 7.791e-09 1.713e+00
15-150 4.837e-08 1.805e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91684 ( -0.499018 0.533794 )
Norm@50keV : 3.43416E-03 ( -0.00127284 0.00125075 )
------------------------------------------------------------
# Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.721041e-01
Photon flux (15-150 keV) in 2.048 sec: 0.496433 ( -0.156833 0.157142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.4639e-08 ( -2.2759e-08 2.4072e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.79432 ( )
Epeak [keV] : 30.2983 ( -4.35833 5.98734 )
Norm@50keV : 1.61342E+04 ( )
------------------------------------------------------------
# Chi-Squared = 51.81 using 59 PHA bins.
# Reduced chi-squared = 0.9253 for 56 degrees of freedom
# Null hypothesis probability = 6.339420e-01
Photon flux (15-150 keV) in 2.048 sec: 0.463741 ( -0.137031 0.143022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30842e-08 ( -1.28166e-08 1.44763e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 2.048 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99982 ( -10483.1 -10468.1 )
beta : -4.14741 ( 4.16171 1.97486 )
Epeak [keV] : 30.7016 ( -6.75632 5.70786 )
Norm@50keV : 198.882 ( -197.808 723.997 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.024958e-01
Photon flux (15-150 keV) in 2.048 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] : 8.27935 (-1.74845 2.47612)
R^2/D10^2 : 0.546363 (-0.546365 0.86451)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9544 for 57 degrees of freedom
# Null hypothesis probability = 5.731084e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.421e-08 8.333e-09
25- 50 2.638e-08 1.616e-08
50-150 7.744e-09 5.843e-09
15-150 4.833e-08 3.033e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.1247 (-30.0204 -57.1263)
Norm : 2.75628 (-1.13176 1.86425)
------------------------------------------------------------
# Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.252011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-08 8.501e-09
25- 50 2.108e-08 1.309e-08
50-150 2.302e-08 1.825e-08
15-150 5.817e-08 3.588e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.984 ( )
R1^2/D10^2 : 3.23844E-05 (-3.24065e-05 4.73891e-05)
kT2 [keV] : 7.91251 (-1.67816 2.33353)
R2^2/D10^2 : 0.628056 (-0.411129 1.00529)
------------------------------------------------------------
# Chi-Squared = 54.40 using 59 PHA bins.
# Chi-Squared = 53.16 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 55 degrees of freedom
# Reduced chi-squared = 0.9666 for 55 degrees of freedom
# Null hypothesis probability = 4.973256e-01
# Null hypothesis probability = 5.451585e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-08 7.627e-03
25- 50 2.639e-08 6.835e-02
50-150 7.791e-09 1.592e+00
15-150 4.837e-08 1.519e+00
Plot creation:
Tue Apr 3 08:10:49 EDT 2012