batgrbproduct Analysis for Trigger=592916
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): Mon Mar 24 00:17:31 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger592916/GCN5_download_cron
======================================================================
Trigger: 00592916 Segment: 000
BAT Trigger Time: 417263003.712 [s; MET]
Trigger Stop: 417263004.736 [s; MET]
UTC: 2014-03-23T10:23:11.917100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 356.888109888947 Dec: -79.9167691220257 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.58
Image Trigger?: NO
Rate S/N Ratio: 35.2562051276084 [ if not an image trigger ]
Image S/N Ratio: 7.58
Flight Position: [ source = BAT ]
RA: 356.888109888947 Dec: -79.9167691220257 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 356.975443771524 Dec: -79.9159063040228 [deg; J2000]
{ 23h 47m 54.1s , -79d 54' 57.3" }
+/- 1.00615761942162 [arcmin] (estimated 90% radius based on SNR)
+/- 0.39560331728562 [arcmin] (formal 1-sigma fit error)
SNR: 30.1515594870802
Angular difference between Flight and Ground position is 0.918916 arcmin
Partial Coding Fraction: 0.1269531 [ including projection effects ]
Duration
T90: 104.851999938488 +/- 2.59570412054245
Measured from: 0.348000109195709
to: 105.200000047684 [s; relative to TRIGTIME]
T50: 72.0079999566078 +/- 0.996971460129056
Measured from: 12.0000001192093
to: 84.0080000758171 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.4200000166893
to: 7.4200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.08799999952316
to: 117.367999970913 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.993685 8.520005 6.852621 1.870801
0.124985 0.138084 0.127999 0.104122 [error]
Peak 0.093483 0.242795 0.306228 0.098090
0.019777 0.025089 0.025179 0.020295 [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 2.48e-06 4.19e-06 5.37e-06 1.39e-05 1.59e-05 2.59e-05 erg/cm2
Error 1.10e-07 1.08e-07 1.39e-07 8.17e-07 3.48e-07 8.82e-07 erg/cm2
Peak flux Power-law 1.38e+00 1.86e+00 1.86e+00 3.36e+00 6.19e+00 8.46e+00 ph/cm2/s
Error 2.84e-01 2.41e-01 1.91e-01 7.09e-01 6.51e-01 8.68e-01 ph/cm2/s
Fluence Cutoff-PL 2.29e-06 4.24e-06 5.53e-06 9.87e-06 1.56e-05 2.19e-05 erg/cm2
Error 1.48e-07 1.15e-07 1.65e-07 1.90e-06 3.78e-07 1.92e-06 erg/cm2
Peak flux Cutoff-PL 1.13e+00 1.92e+00 2.05e+00 1.91e+00 6.07e+00 7.02e+00 ph/cm2/s
Error 3.59e-01 2.68e-01 2.69e-01 1.12e+00 6.62e-01 9.35e-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 1.639 0.040 - - 1.37e-02 2.96e-04 59.100 57
CPL 1.344 0.173 126.8 58.7 1.85e-02 3.20e-03 50.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.002 0.163 - - 5.38e-02 5.52e-03 54.950 57
CPL 0.295 0.766 145.3 960.0 1.08e-01 9.02e-02 51.990 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: 104.256000 sec.
T50 in the 50-300 keV band: 61.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 124.456 -7.088 117.368
T90 104.852 0.348 105.200
T50 72.008 12.000 84.008
Peak 1.000 6.420 7.420
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
356.9754 -79.9159 0.0064 49.1 159.1 7.2717 30.2 TRIG_00592916
------------------------------------------
Foreground time interval of the image:
-7.088 16.089 (delta_t = 23.177 [sec])
Background time interval of the image:
-239.712 -7.088 (delta_t = 232.624 [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 -7.088 sec. to 117.368 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63909 ( -0.0404766 0.0405173 )
Norm@50keV : 1.36873E-02 ( -0.000296448 0.000296439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.10 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.987189e-01
Photon flux (15-150 keV) in 124.5 sec: 1.78084 ( -0.0455723 0.0457707 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58663e-05 ( -3.48375e-07 3.48453e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.088 sec. to 117.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34443 ( -0.175876 0.169695 )
Epeak [keV] : 126.850 ( -27.0513 90.2951 )
Norm@50keV : 1.84758E-02 ( -0.00286979 0.00353211 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.8959 for 56 degrees of freedom
# Null hypothesis probability = 6.941424e-01
Photon flux (15-150 keV) in 124.5 sec: 1.73625 ( -0.05114 0.05154 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56219e-05 ( -3.79352e-07 3.77111e-07 ) ergs/cm2
Band function
Time interval is from -7.088 sec. to 117.368 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11221 ( -0.356709 0.591662 )
beta : -1.78353 ( 1.78355 0.0994608 )
Epeak [keV] : 81.5347 ( -29.495 92.9403 )
Norm@50keV : 2.48896E-02 ( -0.00853427 0.0321372 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.82 using 59 PHA bins.
# Reduced chi-squared = 0.8877 for 55 degrees of freedom
# Null hypothesis probability = 7.083231e-01
Photon flux (15-150 keV) in 124.5 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] : 16.4121 ( )
R^2/D10^2 : 0.136981 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 467.03 using 59 PHA bins.
# Reduced chi-squared = 8.1936 for 57 degrees of freedom
# Null hypothesis probability = 1.021927e-65
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.442e-07 4.233e-08
25- 50 4.059e-06 1.208e-07
50-150 7.715e-06 2.702e-07
15-150 1.272e-05 3.075e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 184.230 (-20.3241 -184.077)
Norm : 7.12153 (-0.187279 0.202714)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.50 using 59 PHA bins.
# Reduced chi-squared = 0.8860 for 57 degrees of freedom
# Null hypothesis probability = 7.157311e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.230e-06 1.071e-07
25- 50 4.249e-06 2.210e-07
50-150 9.071e-06 1.846e-06
15-150 1.555e-05 2.061e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.08604 (-0.718464 0.752004)
R1^2/D10^2 : 1.11071 (-0.277517 0.41087)
kT2 [keV] : 28.0617 (-2.41636 3.16024)
R2^2/D10^2 : 1.51902E-02 (-0.00502029 0.00634735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.25 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 55 degrees of freedom
# Null hypothesis probability = 9.358877e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.890e-06 1.320e-07
25- 50 4.392e-06 1.936e-07
50-150 9.075e-06 5.279e-07
15-150 1.536e-05 7.843e-07
Peak spectrum fit
Power-law model
Time interval is from 6.420 sec. to 7.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00231 ( -0.165832 0.160744 )
Norm@50keV : 5.37529E-02 ( -0.00553928 0.00550208 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.95 using 59 PHA bins.
# Reduced chi-squared = 0.9640 for 57 degrees of freedom
# Null hypothesis probability = 5.524012e-01
Photon flux (15-150 keV) in 1 sec: 6.18930 ( -0.650129 0.652225 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.80806e-07 ( -5.97721e-08 5.98061e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.420 sec. to 7.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.295371 ( -0.836678 0.695031 )
Epeak [keV] : 145.332 ( -48.4414 1871.47 )
Norm@50keV : 0.107995 ( -0.0524192 0.127958 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9284 for 56 degrees of freedom
# Null hypothesis probability = 6.273788e-01
Photon flux (15-150 keV) in 1 sec: 6.07356 ( -0.66102 0.66375 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.74324e-07 ( -6.2129e-08 6.1587e-08 ) ergs/cm2
Band function
Time interval is from 6.420 sec. to 7.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.99999 -4.99999 )
beta : -1.16835 ( -0.351998 0.209766 )
Epeak [keV] : 37.3193 ( -37.3193 9.61886 )
Norm@50keV : 371.098 ( -36.6106 9.89955e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.09 using 59 PHA bins.
# Reduced chi-squared = 0.9834 for 55 degrees of freedom
# Null hypothesis probability = 5.094462e-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] : 22.6560 (-2.60986 3.13745)
R^2/D10^2 : 0.210255 (-0.0719108 0.102495)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.19 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.281673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.970e-08 3.660e-09
25- 50 1.060e-07 1.680e-08
50-150 4.065e-07 6.035e-08
15-150 5.321e-07 6.780e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 25.8028 (-2.70517 2.70487)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.69 using 59 PHA bins.
# Reduced chi-squared = 1.503 for 57 degrees of freedom
# Null hypothesis probability = 8.307050e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.427e-08 3.568e-08
25- 50 1.236e-07 6.126e-08
50-150 2.711e-07 1.347e-07
15-150 4.591e-07 2.445e-07
Double BB
R1^2/D10^2 : 2.42613E-02 ( )
kT2 [keV] : 12.5289 (-7.45439 -12.6199)
R2^2/D10^2 : 0.759839 (-0.460671 7.81814)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.26 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.23 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.21 using 59 PHA bins.
# Reduced chi-squared = 0.9501 for 55 degrees of freedom
# Reduced chi-squared = 0.9496 for 55 degrees of freedom
# Reduced chi-squared = 0.9494 for 55 degrees of freedom
# Null hypothesis probability = 5.801318e-01
# Null hypothesis probability = 5.811776e-01
# Null hypothesis probability = 5.817338e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.073e-08 1.771e-08
25- 50 1.178e-07 6.200e-08
50-150 4.200e-07 2.207e-07
15-150 5.685e-07 2.864e-07
Plot creation:
Mon Mar 24 00:48:32 EDT 2014