batgrbproduct Analysis for Trigger=590446
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 6 10:52:52 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger590446/GCN5_download_cron
======================================================================
Trigger: 00590446 Segment: 000
BAT Trigger Time: 415724432.384 [s; MET]
Trigger Stop: 415724433.408 [s; MET]
UTC: 2014-03-05T15:00:20.662000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 344.533063618552 Dec: 15.4414554624558 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.27
Image Trigger?: NO
Rate S/N Ratio: 11.7046999107196 [ if not an image trigger ]
Image S/N Ratio: 7.27
Flight Position: [ source = BAT ]
RA: 344.533063618552 Dec: 15.4414554624558 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 344.49746923225 Dec: 15.4481462794301 [deg; J2000]
{ 22h 57m 59.4s , +15d 26' 53.3" }
+/- 1.73380817964903 [arcmin] (estimated 90% radius based on SNR)
+/- 0.732038017915537 [arcmin] (formal 1-sigma fit error)
SNR: 13.8576092809581
Angular difference between Flight and Ground position is 2.097318 arcmin
Partial Coding Fraction: 0.4804688 [ including projection effects ]
Duration
T90: 13.6999999284744 +/- 1.80097417735942
Measured from: -0.259999871253967
to: 13.4400000572205 [s; relative to TRIGTIME]
T50: 7.18799996376038 +/- 2.14246585605972
Measured from: 1.13600009679794
to: 8.32400006055832 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.180000007152557
to: 1.18000000715256 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.1240000128746
to: 16.3280000090599 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.188922 0.350421 0.220908 0.039084
0.029382 0.030503 0.026481 0.022094 [error]
Peak 0.020041 0.063612 0.033414 0.007271
0.007326 0.007804 0.007341 0.005475 [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 6.77e-08 1.25e-07 1.79e-07 5.41e-07 5.11e-07 9.13e-07 erg/cm2
Error 1.17e-08 1.39e-08 2.50e-08 1.56e-07 6.14e-08 1.77e-07 erg/cm2
Peak flux Power-law 3.29e-01 3.21e-01 2.19e-01 2.35e-01 9.63e-01 1.10e+00 ph/cm2/s
Error 9.01e-02 6.19e-02 5.34e-02 1.06e-01 1.83e-01 2.15e-01 ph/cm2/s
Fluence Cutoff-PL 5.73e-08 1.43e-07 1.87e-07 1.25e-07 4.67e-07 5.12e-07 erg/cm2
Error 1.38e-08 1.90e-08 2.94e-08 6.80e-08 1.49e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.43e-01 4.53e-01 2.01e-01 1.11e-02 9.08e-01 9.08e-01 ph/cm2/s
Error 9.82e-02 9.94e-02 9.28e-02 2.92e-02 1.78e-01 1.79e-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 1.485 0.175 - - 3.08e-03 3.38e-04 51.590 57
CPL 0.319 0.921 68.8 32.5 1.25e-02 1.90e-02 45.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.553 0.279 - - 7.60e-03 1.53e-03 72.230 57
CPL -1.521 2.529 47.7 11.6 4.41e-01 2.98e+01 59.750 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: 8.576000 sec.
T50 in the 50-300 keV band: 5.056000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 17.452 -1.124 16.328
T90 13.700 -0.260 13.440
T50 7.188 1.136 8.324
Peak 1.000 0.180 1.180
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
344.4975 +15.4481 0.0139 27.7 -84.1 0.9282 13.9 TRIG_00590446
------------------------------------------
Foreground time interval of the image:
-1.124 16.328 (delta_t = 17.452 [sec])
Background time interval of the image:
-60.384 -1.124 (delta_t = 59.260 [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 -1.124 sec. to 16.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48524 ( -0.174226 0.1755 )
Norm@50keV : 3.07998E-03 ( -0.000338733 0.000337175 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.59 using 59 PHA bins.
# Reduced chi-squared = 0.9051 for 57 degrees of freedom
# Null hypothesis probability = 6.774706e-01
Photon flux (15-150 keV) in 17.45 sec: 0.382995 ( -0.041508 0.0415601 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.11114e-07 ( -6.10254e-08 6.16805e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.124 sec. to 16.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.319243 ( -1.02822 0.813782 )
Epeak [keV] : 68.8400 ( -14.1865 50.7589 )
Norm@50keV : 1.25380E-02 ( -0.00773887 0.0302037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.13 using 59 PHA bins.
# Reduced chi-squared = 0.8059 for 56 degrees of freedom
# Null hypothesis probability = 8.504341e-01
Photon flux (15-150 keV) in 17.45 sec: 0.367072 ( -0.043185 0.043114 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.66685e-07 ( -6.71127e-08 6.89292e-08 ) ergs/cm2
Band function
Time interval is from -1.124 sec. to 16.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.678225 ( -0.770546 0.648085 )
beta : -2.10306 ( 2.09475 12.0947 )
Epeak [keV] : 51.0348 ( -18.3249 43.433 )
Norm@50keV : 5.14640E-02 ( -0.0492577 4.98453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7992 for 55 degrees of freedom
# Null hypothesis probability = 8.573698e-01
Photon flux (15-150 keV) in 17.45 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] : 14.1317 (-1.60351 1.87649)
R^2/D10^2 : 5.57835E-02 (-0.0201227 0.0300226)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.41 using 59 PHA bins.
# Reduced chi-squared = 0.9194 for 57 degrees of freedom
# Null hypothesis probability = 6.477612e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.103e-08 7.687e-09
25- 50 1.540e-07 2.180e-08
50-150 2.035e-07 4.816e-08
15-150 3.985e-07 5.872e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-73.358 -199.363)
Norm : 1.58116 (-0.16755 0.16773)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.83 using 59 PHA bins.
# Reduced chi-squared = 0.8566 for 57 degrees of freedom
# Null hypothesis probability = 7.710206e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.870e-08 3.225e-08
25- 50 1.322e-07 6.474e-08
50-150 2.899e-07 1.571e-07
15-150 4.907e-07 2.331e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0026 (-4.05934 3.05221)
R1^2/D10^2 : 0.133062 (-0.0682677 0.329441)
kT2 [keV] : 30.2662 (-24.3212 -30.2613)
R2^2/D10^2 : 2.16332E-03 (-0.00214348 0.0214989)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.11 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 55 degrees of freedom
# Null hypothesis probability = 8.534124e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.270e-08 2.563e-08
25- 50 1.510e-07 7.836e-08
50-150 2.763e-07 1.474e-07
15-150 4.800e-07 2.266e-07
Peak spectrum fit
Power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55257 ( -0.274456 0.283679 )
Norm@50keV : 7.60427E-03 ( -0.00153147 0.0015194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.23 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 57 degrees of freedom
# Null hypothesis probability = 8.426097e-02
Photon flux (15-150 keV) in 1 sec: 0.963327 ( -0.18283 0.183064 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.15841e-08 ( -1.52574e-08 1.56602e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.52100 ( -3.29582 1.76268 )
Epeak [keV] : 47.7388 ( -8.96921 14.1832 )
Norm@50keV : 0.441226 ( -0.558739 59.0415 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.75 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 56 degrees of freedom
# Null hypothesis probability = 3.412507e-01
Photon flux (15-150 keV) in 1 sec: 0.907900 ( -0.176444 0.18 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.67404e-08 ( -1.37536e-08 1.57434e-08 ) ergs/cm2
Band function
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.09522 -5 )
beta : -2.58995 ( -1.33774 0.617963 )
Epeak [keV] : 35.8439 ( -5.28233 5.40181 )
Norm@50keV : 121.647 ( -20.9242 199.99 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.16 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.311808e-01
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] : 12.2485 (-1.99338 2.46365)
R^2/D10^2 : 0.250536 (-0.122428 0.224416)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.07 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.649938e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.961e-09 2.696e-09
25- 50 2.566e-08 7.250e-09
50-150 2.346e-08 8.605e-09
15-150 5.708e-08 1.538e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 144.299 (-69.9875 -142.636)
Norm : 4.11553 (-0.812756 0.99887)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.03 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.318730e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.060e-08 5.850e-09
25- 50 1.954e-08 1.072e-08
50-150 3.795e-08 2.359e-08
15-150 6.810e-08 3.987e-08
Double BB
R1^2/D10^2 : 7.81316E-03 (-0.00360686 0.453444)
kT2 [keV] : 10.8726 (-11.0992 3.44586)
R2^2/D10^2 : 0.313829 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.75 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.73 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Null hypothesis probability = 2.970702e-01
# Null hypothesis probability = 3.071166e-01
# Null hypothesis probability = 3.078916e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Thu Mar 6 11:00:50 EST 2014