batgrbproduct Analysis for Trigger=586863
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 Feb 18 02:58:10 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger586863/GCN5_download_cron
======================================================================
Trigger: 00586863 Segment: 000
BAT Trigger Time: 414338941.76 [s; MET]
Trigger Stop: 414338942.784 [s; MET]
UTC: 2014-02-17T14:08:50.103520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.133293968185 Dec: -28.7466967620912 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.97
Image Trigger?: NO
Rate S/N Ratio: 36.8646171823335 [ if not an image trigger ]
Image S/N Ratio: 15.97
Flight Position: [ source = BAT ]
RA: 266.133293968185 Dec: -28.7466967620912 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.135501152623 Dec: -28.735837889453 [deg; J2000]
{ 17h 44m 32.5s , -28d 44' 09.0" }
+/- 1.60311602926514 [arcmin] (estimated 90% radius based on SNR)
+/- 0.657093842711513 [arcmin] (formal 1-sigma fit error)
SNR: 15.499271975521
Angular difference between Flight and Ground position is 0.661798 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 156.531999945641 +/- 24.660628551416
Measured from: -119.827999889851
to: 36.7040000557899 [s; relative to TRIGTIME]
T50: 41.2679999470711 +/- 28.5955118824806
Measured from: -29.2359998822212
to: 12.0320000648499 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0759999752044678
to: 0.924000024795532 [s; relative to TRIGTIME]
Total Fluence
Measured from: -133.463999986649
to: 55.2480000257492 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.311680 1.061704 0.115318 -0.113376
0.107077 0.096889 0.081134 0.072594 [error]
Peak 0.206415 0.085763 0.005206 0.001461
0.010375 0.008082 0.005759 0.005181 [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 6.70e-07 4.00e-07 1.52e-07 7.70e-08 1.26e-06 1.30e-06 erg/cm2
Error 7.06e-08 5.22e-08 4.42e-08 4.00e-08 1.28e-07 1.42e-07 erg/cm2
Peak flux Power-law 1.97e+00 6.40e-01 1.16e-01 2.44e-02 2.74e+00 2.75e+00 ph/cm2/s
Error 2.08e-01 7.54e-02 2.93e-02 1.06e-02 2.49e-01 2.50e-01 ph/cm2/s
Fluence Cutoff-PL 6.61e-07 4.16e-07 9.37e-08 6.74e-09 1.18e-06 1.18e-06 erg/cm2
Error 7.40e-08 5.89e-08 6.29e-08 3.63e-08 1.36e-07 1.43e-07 erg/cm2
Peak flux Cutoff-PL 1.91e+00 7.06e-01 1.43e-02 2.13e-06 2.63e+00 2.63e+00 ph/cm2/s
Error 2.32e-01 9.76e-02 1.79e-02 4.33e-05 2.54e-01 2.54e-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 3.395 0.263 - - 4.53e-04 9.91e-05 65.640 57
CPL 1.890 0.000 2.1 0.0 5.27e-03 0.00e+00 62.890 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.466 0.233 - - 6.97e-03 1.39e-03 78.350 57
CPL 1.000 0.000 50.0 0.0 3.34e-02 0.00e+00 231.420 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 188.712 -133.464 55.248
T90 156.532 -119.828 36.704
T50 41.268 -29.236 12.032
Peak 1.000 -0.076 0.924
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.1355 -28.7358 0.0124 0.0 91.9 2.8289 15.5 TRIG_00586863
------------------------------------------
Foreground time interval of the image:
-81.359 55.248 (delta_t = 136.607 [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 -133.464 sec. to 55.248 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39496 ( -0.252702 0.273353 )
Norm@50keV : 4.52771E-04 ( -9.57275e-05 0.000102526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.022766e-01
Photon flux (15-150 keV) in 188.7 sec: 0.168296 ( -0.0151068 0.0151124 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2625e-06 ( -1.26373e-07 1.29565e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -133.464 sec. to 55.248 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89033 ( )
Epeak [keV] : 2.07037 ( )
Norm@50keV : 5.26593E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.89 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 56 degrees of freedom
# Null hypothesis probability = 2.455039e-01
Photon flux (15-150 keV) in 188.7 sec: 0.163904 ( -0.015548 0.015587 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17627e-06 ( -1.28056e-07 1.44442e-07 ) ergs/cm2
Band function
Time interval is from -133.464 sec. to 55.248 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.97776 ( -0.344302 0.144862 )
beta : -9.37167 ( 9.37167 19.3713 )
Epeak [keV] : 0.447479 ( -0.130622 13.1345 )
Norm@50keV : 4.54890E-03 ( -0.00116534 0.00126116 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.81 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 55 degrees of freedom
# Null hypothesis probability = 2.191470e-01
Photon flux (15-150 keV) in 188.7 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] : 4.83401 (-0.489029 0.546986)
R^2/D10^2 : 1.57368 (-0.653089 1.15579)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.16 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 57 degrees of freedom
# Null hypothesis probability = 5.387610e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.297e-07 9.944e-08
25- 50 3.780e-07 6.633e-08
50-150 1.302e-08 6.201e-09
15-150 1.021e-06 1.409e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.1920 (-2.46455 3.01428)
Norm : 3.16963 (-0.842513 1.09399)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.71 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.523054e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.499e-07 9.218e-08
25- 50 4.192e-07 6.123e-08
50-150 6.589e-08 2.946e-08
15-150 1.135e-06 1.311e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.27589 (-0.830677 0.800791)
R1^2/D10^2 : 8.55012 (-5.53609 30.7196)
kT2 [keV] : 8.43665 (-2.12904 3.67027)
R2^2/D10^2 : 6.48997E-02 (-0.0552989 0.25943)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.18 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 55 degrees of freedom
# Null hypothesis probability = 2.639462e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.740e-07 3.402e-07
25- 50 4.133e-07 2.169e-07
50-150 9.797e-08 6.147e-08
15-150 1.185e-06 5.793e-07
Peak spectrum fit
Power-law model
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.46629 ( -0.225295 0.240468 )
Norm@50keV : 6.96938E-03 ( -0.00134731 0.00142874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.35 using 59 PHA bins.
# Reduced chi-squared = 1.375 for 57 degrees of freedom
# Null hypothesis probability = 3.187735e-02
Photon flux (15-150 keV) in 1 sec: 2.74286 ( -0.249252 0.249348 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07442e-07 ( -1.04701e-08 1.06069e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.34455E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 231.42 using 59 PHA bins.
# Reduced chi-squared = 4.1325 for 56 degrees of freedom
# Null hypothesis probability = 3.430260e-23
Photon flux (15-150 keV) in 1 sec: 2.62888 ( -0.25426 0.25344 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.50598e-08 ( -9.0403e-09 9.1692e-09 ) ergs/cm2
Band function
Time interval is from -0.076 sec. to 0.924 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.87108 ( )
beta : -4.02359 ( )
Epeak [keV] : 7.63219 ( )
Norm@50keV : 2.78231E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 135.82 using 59 PHA bins.
# Reduced chi-squared = 2.4695 for 55 degrees of freedom
# Null hypothesis probability = 8.755077e-09
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] : 4.84652 (-0.355373 0.381272)
R^2/D10^2 : 27.2512 (-8.80475 13.2145)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 0.9881 for 57 degrees of freedom
# Null hypothesis probability = 5.004121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.840e-08 8.435e-09
25- 50 3.529e-08 5.795e-09
50-150 1.231e-09 5.646e-10
15-150 9.493e-08 1.009e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.8880 (-1.69245 2.10642)
Norm : 60.2946 (-12.4951 18.4463)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.83 using 59 PHA bins.
# Reduced chi-squared = 1.102 for 57 degrees of freedom
# Null hypothesis probability = 2.773446e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.002e-08 8.295e-09
25- 50 3.518e-08 4.925e-09
50-150 4.521e-09 1.757e-09
15-150 9.972e-08 1.143e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.79183 (-0.371794 0.372971)
R1^2/D10^2 : 28.6549 (-8.76232 14.5007)
kT2 [keV] : 199.223 (-178.263 -199.215)
R2^2/D10^2 : 5.60250E-05 (-4.93226e-05 0.000264775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.87 using 59 PHA bins.
# Reduced chi-squared = 0.9613 for 55 degrees of freedom
# Null hypothesis probability = 5.563721e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.867e-08 7.650e-09
25- 50 3.502e-08 6.170e-09
50-150 1.595e-08 2.859e-09
15-150 1.097e-07 1.100e-08
Plot creation:
Tue Feb 18 03:21:47 EST 2014