batgrbproduct Analysis for Trigger=598497
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): Fri May 9 13:25:27 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger598497/GCN5_download_cron
======================================================================
Trigger: 00598497 Segment: 000
BAT Trigger Time: 421294945.6 [s; MET]
Trigger Stop: 421294949.696 [s; MET]
UTC: 2014-05-09T02:22:13.613280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 46.608358981037 Dec: -62.6535551180924 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.6
Image Trigger?: NO
Rate S/N Ratio: 10.1488915650922 [ if not an image trigger ]
Image S/N Ratio: 7.6
Flight Position: [ source = BAT ]
RA: 46.608358981037 Dec: -62.6535551180924 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 46.5639097799908 Dec: -62.6619044605091 [deg; J2000]
{ 03h 06m 15.3s , -62d 39' 42.9" }
+/- 1.90023094866231 [arcmin] (estimated 90% radius based on SNR)
+/- 0.81239165289865 [arcmin] (formal 1-sigma fit error)
SNR: 12.1569195108063
Angular difference between Flight and Ground position is 1.323424 arcmin
Partial Coding Fraction: 0.1953125 [ including projection effects ]
Duration
T90: 23.2000000476837 +/- 5.17115694874123
Measured from: -2.83199989795685
to: 20.3680001497269 [s; relative to TRIGTIME]
T50: 9.08799999952316 +/- 2.62020458549755
Measured from: 0.992000102996826
to: 10.08000010252 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.77999997138977
to: 2.77999997138977 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.80800002813339
to: 23.1200000047684 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.554778 0.661231 0.497708 0.196844
0.068576 0.072148 0.064606 0.056382 [error]
Peak 0.050754 0.051172 0.074101 0.016732
0.013950 0.015237 0.013428 0.011573 [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 1.82e-07 3.16e-07 4.19e-07 1.14e-06 1.22e-06 2.05e-06 erg/cm2
Error 3.43e-08 3.73e-08 6.38e-08 3.64e-07 1.54e-07 4.16e-07 erg/cm2
Peak flux Power-law 5.09e-01 5.14e-01 3.65e-01 4.13e-01 1.55e+00 1.80e+00 ph/cm2/s
Error 2.10e-01 1.36e-01 9.97e-02 2.26e-01 3.86e-01 4.23e-01 ph/cm2/s
Fluence Cutoff-PL 1.73e-07 3.29e-07 4.28e-07 6.75e-07 1.19e-06 1.60e-06 erg/cm2
Error 3.98e-08 3.56e-08 6.92e-08 6.96e-07 1.68e-07 5.54e-07 erg/cm2
Peak flux Cutoff-PL 4.34e-01 5.53e-01 3.99e-01 2.00e-01 1.51e+00 1.59e+00 ph/cm2/s
Error 3.55e-01 1.68e-01 1.33e-01 3.19e-01 4.10e-01 5.33e-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 1.591 0.196 - - 4.85e-03 5.70e-04 73.750 57
CPL 1.245 0.639 107.2 -30.9 7.32e-03 8.08e-03 73.150 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.494 0.387 - - 1.24e-02 2.93e-03 60.360 57
CPL 0.681 2.171 85.2 -26.3 3.11e-02 3.52e-01 59.890 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: 32.768000 sec.
T50 in the 50-300 keV band: 14.400000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.928 -3.808 23.120
T90 23.200 -2.832 20.368
T50 9.088 0.992 10.080
Peak 1.000 1.780 2.780
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
46.5639 -62.6619 0.0158 44.2 30.1 1.7151 12.2 TRIG_00598497
------------------------------------------
Foreground time interval of the image:
-3.808 23.120 (delta_t = 26.928 [sec])
Background time interval of the image:
-239.600 -152.680 (delta_t = 86.920 [sec])
-151.600 -3.808 (delta_t = 147.792 [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 -3.808 sec. to 23.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59117 ( -0.19426 0.197131 )
Norm@50keV : 4.84894E-03 ( -0.000572306 0.000567999 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.75 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 57 degrees of freedom
# Null hypothesis probability = 6.706902e-02
Photon flux (15-150 keV) in 26.93 sec: 0.621418 ( -0.072479 0.0726193 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22255e-06 ( -1.53531e-07 1.54863e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.808 sec. to 23.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24543 ( -0.88692 0.390654 )
Epeak [keV] : 107.225 ( -45.3292 -107.229 )
Norm@50keV : 7.31825E-03 ( -0.00296452 0.0131982 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.15 using 59 PHA bins.
# Reduced chi-squared = 1.306 for 56 degrees of freedom
# Null hypothesis probability = 6.162460e-02
Photon flux (15-150 keV) in 26.93 sec: 0.613289 ( -0.074959 0.07472 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19388e-06 ( -1.68576e-07 1.6748e-07 ) ergs/cm2
Band function
Time interval is from -3.808 sec. to 23.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98603 ( -4.98603 -4.98603 )
beta : -1.68799 ( -0.255601 0.219772 )
Epeak [keV] : 24.2746 ( -24.2746 4.97602 )
Norm@50keV : 659.794 ( -74.3587 2.63087e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.58 using 59 PHA bins.
# Reduced chi-squared = 1.301 for 55 degrees of freedom
# Null hypothesis probability = 6.589834e-02
Photon flux (15-150 keV) in 26.93 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] : 14.2851 (-1.88969 2.20707)
R^2/D10^2 : 8.26318E-02 (-0.0334799 0.0552007)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.08 using 59 PHA bins.
# Reduced chi-squared = 1.580 for 57 degrees of freedom
# Null hypothesis probability = 3.420095e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.572e-08 1.990e-08
25- 50 3.632e-07 6.154e-08
50-150 4.929e-07 1.200e-07
15-150 9.518e-07 1.382e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 182.143 (-76.0678 -180.953)
Norm : 2.53883 (-0.301239 0.364205)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.13 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.368819e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.722e-07 9.583e-08
25- 50 3.276e-07 1.744e-07
50-150 6.966e-07 3.794e-07
15-150 1.196e-06 6.502e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.86340 (-1.91196 3.63028)
R1^2/D10^2 : 1.19551 (-0.931154 4.46513)
kT2 [keV] : 21.7523 (-5.1227 20.0723)
R2^2/D10^2 : 1.48540E-02 (-0.0134112 0.0159016)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.49 using 59 PHA bins.
# Reduced chi-squared = 1.336 for 55 degrees of freedom
# Null hypothesis probability = 4.856483e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.774e-07 8.876e-08
25- 50 3.197e-07 1.540e-07
50-150 6.647e-07 3.685e-07
15-150 1.162e-06 4.959e-07
Peak spectrum fit
Power-law model
Time interval is from 1.780 sec. to 2.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49390 ( -0.388989 0.384305 )
Norm@50keV : 1.24411E-02 ( -0.00292893 0.00292505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.36 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.554119e-01
Photon flux (15-150 keV) in 1 sec: 1.55061 ( -0.385125 0.387331 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18141e-07 ( -2.9126e-08 2.92844e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.780 sec. to 2.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.681379 ( -3.18369 1.15903 )
Epeak [keV] : 85.2350 ( -32.6637 -85.1675 )
Norm@50keV : 3.11173E-02 ( -0.0311837 0.672873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.89 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 56 degrees of freedom
# Null hypothesis probability = 3.365308e-01
Photon flux (15-150 keV) in 1 sec: 1.51317 ( -0.41854 0.40049 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14599e-07 ( -3.06083e-08 3.0766e-08 ) ergs/cm2
Band function
Time interval is from 1.780 sec. to 2.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.452640 ( 0.68779 3.5231 )
beta : -2.24422 ( 2.08124 2.22829 )
Epeak [keV] : 76.8206 ( -76.8196 244.279 )
Norm@50keV : 4.03955E-02 ( -0.0403868 1245.48 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.57 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 55 degrees of freedom
# Null hypothesis probability = 3.129016e-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] : 16.5202 (-3.33433 4.42446)
R^2/D10^2 : 0.134141 (-0.0786285 0.166078)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.29 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.248094e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.512e-09 3.463e-09
25- 50 3.247e-08 1.339e-08
50-150 6.268e-08 2.853e-08
15-150 1.027e-07 4.198e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-111.559 -199.363)
Norm : 6.45635 (-1.51265 1.68122)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.616480e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-08 9.505e-09
25- 50 3.093e-08 1.813e-08
50-150 6.783e-08 3.966e-08
15-150 1.148e-07 6.680e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.87591 (-2.9067 20.5937)
R1^2/D10^2 : 12.4943 (-12.9472 2181.71)
kT2 [keV] : 18.5561 (-4.17219 -18.5365)
R2^2/D10^2 : 8.12093E-02 (-0.0806085 0.115905)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.494748e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.528e-08 9.435e-09
25- 50 2.942e-08 1.651e-08
50-150 6.603e-08 4.094e-08
15-150 1.107e-07 6.065e-08
Plot creation:
Fri May 9 13:30:19 EDT 2014