batgrbproduct Analysis for Trigger=551030
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 Mar 14 18:17:41 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger551030/GCN5_download_cron
======================================================================
Trigger: 00551030 Segment: 000
BAT Trigger Time: 384945104 [s; MET]
Trigger Stop: 384945168 [s; MET]
UTC: 2013-03-14T09:11:33.678560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 41.38433012623 Dec: -30.2553313620773 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.82
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.82
Flight Position: [ source = BAT ]
RA: 41.38433012623 Dec: -30.2553313620773 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.4135062171963 Dec: -30.2535206895056 [deg; J2000]
{ 02h 45m 39.2s , -30d 15' 12.7" }
+/- 4.12058058609098 [arcmin] (estimated 90% radius based on SNR)
+/- 2.2439626079224 [arcmin] (formal 1-sigma fit error)
SNR: 4.02352183744273
Angular difference between Flight and Ground position is 1.516030 arcmin
Partial Coding Fraction: 0.2617188 [ 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 0.345013 0.218836 0.107317 -0.012635
0.086539 0.089937 0.080571 0.072686 [error]
Peak 0.345013 0.218836 0.107317 -0.012635
0.086539 0.089937 0.080571 0.072686 [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 1.17e-07 1.18e-07 8.39e-08 9.48e-08 3.56e-07 4.14e-07 erg/cm2
Error 4.92e-08 4.93e-08 6.45e-08 1.56e-07 1.61e-07 2.49e-07 erg/cm2
Peak flux Power-law 6.02e-02 3.39e-02 1.20e-02 5.60e-03 1.09e-01 1.12e-01 ph/cm2/s
Error 2.58e-02 1.37e-02 8.96e-03 8.52e-03 3.92e-02 4.05e-02 ph/cm2/s
Fluence Cutoff-PL 1.14e-07 1.34e-07 6.54e-08 1.14e-08 3.23e-07 3.25e-07 erg/cm2
Error 5.30e-08 9.97e-08 7.61e-08 9.64e-08 2.53e-07 2.58e-07 erg/cm2
Peak flux Cutoff-PL 5.81e-02 3.85e-02 9.82e-03 9.07e-04 1.07e-01 1.07e-01 ph/cm2/s
Error 2.77e-02 1.76e-02 1.08e-02 5.67e-03 3.86e-02 3.88e-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 5.82e-02 3.79e-02 1.09e-01 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.77e-02 3.93e-02 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 2.494 0.784 - - 5.57e-04 3.23e-04 68.980 57
CPL 1.294 0.000 20.2 0.0 3.38e-03 0.00e+00 68.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.494 0.784 - - 5.57e-04 3.23e-04 68.980 57
CPL 1.294 0.000 20.2 0.0 3.38e-03 0.00e+00 68.400 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
41.4135 -30.2535 0.0480 47.2 -31.9 0.7245 4.0 TRIG_00551030
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49402 ( -0.666819 0.90155 )
Norm@50keV : 5.57417E-04 ( -0.000319154 0.000327171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.98 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.327663e-01
Photon flux (15-150 keV) in 64 sec: 0.109102 ( -0.0391419 0.0391864 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56148e-07 ( -1.51595e-07 1.69631e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29387 ( )
Epeak [keV] : 20.1759 ( )
Norm@50keV : 3.38326E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 56 degrees of freedom
# Null hypothesis probability = 1.236854e-01
Photon flux (15-150 keV) in 64 sec: 0.107253 ( -0.0384131 0.038779 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23273e-07 ( -3.23273e-07 1.82616e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97082 ( -7.95479 -4.97082 )
beta : -3.05856 ( 3.05856 1.00884 )
Epeak [keV] : 21.6773 ( -21.6773 6.80252 )
Norm@50keV : 387.086 ( -133.138 2.64235e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246831e-01
Photon flux (15-150 keV) in 64 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] : 6.18727 (-2.21562 4.50611)
R^2/D10^2 : 0.347051 (-0.342739 2.18853)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.52 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.235682e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.179e-07 7.152e-08
25- 50 1.256e-07 8.483e-08
50-150 1.303e-08 1.107e-08
15-150 2.566e-07 1.574e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.0179 (-18.0175 56.8605)
Norm : 0.865599 (-0.455975 1.32081)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.39 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.435041e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.146e-07 7.178e-08
25- 50 1.334e-07 8.234e-08
50-150 7.629e-08 6.733e-08
15-150 3.243e-07 2.066e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.43956 (-4.43978 3.86105)
R1^2/D10^2 : 1.10965 (-1.10945 973058)
kT2 [keV] : 13.9398 (-13.9405 -13.9405)
R2^2/D10^2 : 7.34135E-03 (-0.00733961 0.0416872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Null hypothesis probability = 1.189844e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.240e-07 7.293e-08
25- 50 1.218e-07 6.134e-08
50-150 9.233e-08 7.590e-08
15-150 3.382e-07 1.804e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49402 ( -0.666819 0.90155 )
Norm@50keV : 5.57417E-04 ( -0.000319154 0.000327171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.98 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.327663e-01
Photon flux (15-150 keV) in 64 sec: 0.109102 ( -0.0391419 0.0391864 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.56148e-07 ( -1.51595e-07 1.69631e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29387 ( )
Epeak [keV] : 20.1759 ( )
Norm@50keV : 3.38326E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 56 degrees of freedom
# Null hypothesis probability = 1.236854e-01
Photon flux (15-150 keV) in 64 sec: 0.107253 ( -0.0384131 0.038779 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23273e-07 ( -3.23273e-07 1.82616e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97082 ( -7.95479 -4.97082 )
beta : -3.05856 ( 3.05856 1.00884 )
Epeak [keV] : 21.6773 ( -21.6773 6.80252 )
Norm@50keV : 387.086 ( -133.138 2.64235e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246831e-01
Photon flux (15-150 keV) in 64 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] : 6.18727 (-2.21562 4.50611)
R^2/D10^2 : 0.347051 (-0.342739 2.18853)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.52 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.235682e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.179e-07 6.979e-08
25- 50 1.256e-07 8.307e-08
50-150 1.303e-08 1.245e-08
15-150 2.566e-07 1.622e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.0179 (-18.0175 56.8605)
Norm : 0.865599 (-0.455975 1.32081)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.39 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.435041e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.146e-07 7.050e-08
25- 50 1.334e-07 8.061e-08
50-150 7.629e-08 6.707e-08
15-150 3.243e-07 2.134e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.43956 (-4.43978 3.86105)
R1^2/D10^2 : 1.10965 (-1.10945 973058)
kT2 [keV] : 13.9398 (-13.9405 -13.9405)
R2^2/D10^2 : 7.34135E-03 (-0.00733961 0.0416872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.57 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Null hypothesis probability = 1.189844e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.240e-07 7.398e-08
25- 50 1.218e-07 7.085e-08
50-150 9.233e-08 6.992e-08
15-150 3.382e-07 1.853e-07
Plot creation:
Thu Mar 14 18:56:46 EDT 2013