batgrbproduct Analysis for Trigger=557771
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): Sun Jun 9 18:55:32 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557771/GCN5_download_cron
======================================================================
Trigger: 00557771 Segment: 000
BAT Trigger Time: 392426072 [s; MET]
Trigger Stop: 392426136 [s; MET]
UTC: 2013-06-08T23:14:21.348120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 24.5798859527311 Dec: 41.4938034558663 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.45
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.45
Flight Position: [ source = BAT ]
RA: 24.5798859527311 Dec: 41.4938034558663 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 24.5971992672733 Dec: 41.4917988610012 [deg; J2000]
{ 01h 38m 23.3s , +41d 29' 30.5" }
+/- 2.54902464564138 [arcmin] (estimated 90% radius based on SNR)
+/- 1.55785924767516 [arcmin] (formal 1-sigma fit error)
SNR: 7.99068562952451
Angular difference between Flight and Ground position is 0.787342 arcmin
Partial Coding Fraction: 0.4570312 [ including projection effects ]
Duration
T90: 151.375999927521 +/- 10.8413366403143
Measured from: -131.671999871731
to: 19.7040000557899 [s; relative to TRIGTIME]
T50: 19.839999973774 +/- 59.331824430747
Measured from: -11.5359998941422
to: 8.30400007963181 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 19.055999994278
to: 20.055999994278 [s; relative to TRIGTIME]
Total Fluence
Measured from: -134.191999971867
to: 22.2039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.958750 0.529956 0.371024 -0.089743
0.106453 0.110078 0.098584 0.092979 [error]
Peak 0.034962 0.018631 0.012795 0.006233
0.009659 0.009744 0.008544 0.008256 [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 3.42e-07 3.03e-07 1.85e-07 1.71e-07 9.02e-07 1.00e-06 erg/cm2
Error 6.44e-08 6.32e-08 8.10e-08 1.40e-07 1.92e-07 2.70e-07 erg/cm2
Peak flux Power-law 3.09e-01 1.93e-01 7.72e-02 4.18e-02 6.00e-01 6.21e-01 ph/cm2/s
Error 1.64e-01 8.97e-02 6.37e-02 7.25e-02 2.55e-01 2.68e-01 ph/cm2/s
Fluence Cutoff-PL 3.41e-07 3.08e-07 1.78e-07 1.15e-07 8.88e-07 9.43e-07 erg/cm2
Error 6.57e-08 7.20e-08 9.58e-08 1.41e-07 2.05e-07 2.97e-07 erg/cm2
Peak flux Cutoff-PL 3.05e-01 2.02e-01 7.42e-02 2.25e-02 5.96e-01 6.03e-01 ph/cm2/s
Error 1.70e-01 1.11e-01 7.47e-02 6.99e-02 2.56e-01 2.71e-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 6.13e-01 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 2.715 0.409 - - 5.40e-04 1.75e-04 55.400 57
CPL 1.948 0.000 2.4 0.0 1.66e-03 0.00e+00 55.900 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.319 0.952 - - 3.40e-03 2.19e-03 69.760 57
CPL 1.926 0.000 7.0 0.0 6.02e-03 0.00e+00 69.700 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 156.396 -134.192 22.204
T90 151.376 -131.672 19.704
T50 19.840 -11.536 8.304
Peak 1.000 19.056 20.056
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
24.5972 +41.4918 0.0242 41.2 -148.0 1.4560 8.0 TRIG_00557771
------------------------------------------
Foreground time interval of the image:
-75.599 22.204 (delta_t = 97.803 [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 -134.192 sec. to 22.204 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.71452 ( -0.373807 0.445062 )
Norm@50keV : 5.39602E-04 ( -0.000173235 0.000175863 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 0.9719 for 57 degrees of freedom
# Null hypothesis probability = 5.354768e-01
Photon flux (15-150 keV) in 156.4 sec: 0.121598 ( -0.0193642 0.0193795 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02395e-07 ( -1.85519e-07 1.98184e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -134.192 sec. to 22.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94782 ( )
Epeak [keV] : 2.39821 ( )
Norm@50keV : 1.66311E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.90 using 59 PHA bins.
# Reduced chi-squared = 0.9983 for 56 degrees of freedom
# Null hypothesis probability = 4.784687e-01
Photon flux (15-150 keV) in 156.4 sec: 0.121071 ( -0.019356 0.019655 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.87781e-07 ( -2.02027e-07 2.08622e-07 ) ergs/cm2
Band function
Time interval is from -134.192 sec. to 22.204 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.21203 ( 4.21203 4.21203 )
beta : -2.71447 ( -0.445001 0.373587 )
Epeak [keV] : 3.88412 ( -3.88412 -3.88412 )
Norm@50keV : 7.33423E-02 ( -0.0235479 0.0238994 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.596854e-01
Photon flux (15-150 keV) in 156.4 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] : 5.39394 (-1.02412 1.39337)
R^2/D10^2 : 0.678888 (-0.430696 1.13275)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.62 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.279297e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.465e-07 1.217e-07
25- 50 2.716e-07 1.079e-07
50-150 1.574e-08 1.103e-08
15-150 6.337e-07 1.974e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1079 (-9.06922 14.9265)
Norm : 1.13671 (-0.39195 0.766408)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.666206e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.265e-07 7.320e-08
25- 50 3.356e-07 1.028e-07
50-150 1.436e-07 8.382e-08
15-150 8.057e-07 1.891e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.90638 (-0.94921 1.0974)
R1^2/D10^2 : 2.47287 (-1.68857 7.72603)
kT2 [keV] : 15.0913 (-4.90414 8.30698)
R2^2/D10^2 : 5.90155E-03 (-0.00496028 0.0247816)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9577 for 55 degrees of freedom
# Null hypothesis probability = 5.639252e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.572e-07 1.971e-07
25- 50 2.813e-07 1.451e-07
50-150 2.741e-07 1.722e-07
15-150 9.127e-07 4.883e-07
Peak spectrum fit
Power-law model
Time interval is from 19.056 sec. to 20.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.31901 ( -0.794692 1.10839 )
Norm@50keV : 3.39940E-03 ( -0.00221256 0.00217299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.76 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.194906e-01
Photon flux (15-150 keV) in 1 sec: 0.600422 ( -0.255339 0.255506 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26016e-08 ( -1.65193e-08 1.86453e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 19.056 sec. to 20.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92578 ( )
Epeak [keV] : 6.96362 ( )
Norm@50keV : 6.02425E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.70 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 56 degrees of freedom
# Null hypothesis probability = 1.032139e-01
Photon flux (15-150 keV) in 1 sec: 0.596124 ( -0.255013 0.256615 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14602e-08 ( -1.97416e-08 1.94501e-08 ) ergs/cm2
Band function
Time interval is from 19.056 sec. to 20.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93886 ( -6.92885 -4.93886 )
beta : -2.80338 ( 2.80338 1.12972 )
Epeak [keV] : 22.3551 ( -22.3551 9.62022 )
Norm@50keV : 1534.69 ( -635.921 1.7554e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.02 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 55 degrees of freedom
# Null hypothesis probability = 9.685748e-02
Photon flux (15-150 keV) in 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] : 6.33060 (-2.35388 4.61389)
R^2/D10^2 : 1.73316 (-1.73263 11.5145)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.40 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 57 degrees of freedom
# Null hypothesis probability = 1.094339e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.929e-09 6.115e-09
25- 50 1.110e-08 7.535e-09
50-150 1.260e-09 1.198e-09
15-150 2.229e-08 1.480e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.8242 (-37.844 -37.844)
Norm : 4.05497 (-2.37983 9.11507)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.80 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.188013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.130e-09 5.795e-09
25- 50 1.172e-08 8.000e-09
50-150 8.518e-09 7.340e-09
15-150 2.937e-08 2.007e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.13134 (-5.23221 3.69547)
R1^2/D10^2 : 3.58824 (-3.36595 153.836)
kT2 [keV] : 22.7514 (-23.7365 -23.7365)
R2^2/D10^2 : 6.84232E-03 (-0.00609916 5.7946)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.74 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 55 degrees of freedom
# Null hypothesis probability = 1.008315e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.032e-08 6.680e-09
25- 50 1.021e-08 5.925e-09
50-150 1.377e-08 1.004e-08
15-150 3.429e-08 1.893e-08
Plot creation:
Sun Jun 9 19:15:50 EDT 2013