batgrbproduct Analysis for Trigger=652046
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 Aug 14 07:58:11 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger652046/GCN5_download_cron
======================================================================
Trigger: 00652046 Segment: 000
BAT Trigger Time: 461134483.22 [s; MET]
Trigger Stop: 461134483.284 [s; MET]
UTC: 2015-08-13T04:54:28.233680 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 216.66067442462 Dec: -7.54127008420654 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.5
Image Trigger?: NO
Rate S/N Ratio: 10.1488915650922 [ if not an image trigger ]
Image S/N Ratio: 6.5
Flight Position: [ source = BAT ]
RA: 216.66067442462 Dec: -7.54127008420654 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 216.654934910614 Dec: -7.54145498533092 [deg; J2000]
{ 14h 26m 37.2s , -07d 32' 29.2" }
+/- 4.24608458468471 [arcmin] (estimated 90% radius based on SNR)
+/- 2.8809345295812 [arcmin] (formal 1-sigma fit error)
SNR: 3.85471034624092
Angular difference between Flight and Ground position is 0.341572 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 0.0639999508857727 +/-
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
T50: 0.0639999508857727 +/-
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0639999508857727 second)
Measured from: -2.98023223876953e-08
to: 0.0639999210834503 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000464 0.000982 0.004927 0.005474
0.001527 0.001354 0.001412 0.001535 [error]
Peak -0.000464 0.000982 0.004927 0.005474
0.001527 0.001354 0.001412 0.001535 [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 4.54e-126.52e-13 1.10e-11 4.72e-11 3.13e-08 1.01e-09 2.39e-08 erg/cm2
Error 2.02e-10 3.30e-10 5.53e-10 3.07e-08 1.57e-09 3.16e-08 erg/cm2
Peak flux Power-law 2.09e-032.77e-04 2.72e-03 2.20e-02 1.14e+00 8.57e-02 1.01e+00 ph/cm2/s
Error 1.02e-01 9.13e-02 7.32e-02 1.14e+00 2.74e-01 1.20e+00 ph/cm2/s
Fluence Cutoff-PL 3.18e-11 1.53e-10 6.12e-10 9.79e-09 1.87e-09 1.05e-08 erg/cm2
Error 2.18e-10 -------- -------- -------- 1.83e-09 5.23e-07 erg/cm2
Peak flux Cutoff-PL 1.71e-02 4.19e-02 8.02e-02 4.03e-01 2.21e-01 5.36e-01 ph/cm2/s
Error 1.11e-01 -------- -------- 1.63e+01 -------- 1.50e+00 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.066 1.002 - - 1.78e-04 2.22e-03 69.280 57
CPL -2.928 1.292 9999.4 0.0 8.65e-05 0.00e+00 69.150 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.066 1.002 - - 1.78e-04 2.22e-03 69.280 57
CPL -2.928 1.448 9999.4 0.0 8.65e-05 0.00e+00 69.150 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 -0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
216.6549 -7.5415 0.0502 11.5 -98.2 0.0110 3.9 TRIG_00652046
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.220 -3.220 (delta_t = 57.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.06582 ( 0.945909 2.94971 )
Norm@50keV : 1.78175E-04 ( -0.000178643 0.00425912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.28 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.274895e-01
Photon flux (15-150 keV) in 0.064 sec: 8.57365E-02 ( -0.0869812 0.460467 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01265e-09 ( -1.01135e-09 2.12916e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.92835 ( 2.92833 5.51181 )
Epeak [keV] : 9999.35 ( -9999.35 -9999.35 )
Norm@50keV : 8.64646E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.15 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 56 degrees of freedom
# Null hypothesis probability = 1.114131e-01
Photon flux (15-150 keV) in 0.064 sec: 0.221213 0.186643 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87208e-09 ( -1.27757e-09 2.37302e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : 1.99709 ( -1.99995 -1.99995 )
Epeak [keV] : 136.139 ( -136.004 -136.004 )
Norm@50keV : 2.77299E-03 ( -0.00273512 2.71326e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.29 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.308205e-02
Photon flux (15-150 keV) in 0.064 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] : 200.000 (-200 -200)
R^2/D10^2 : 1.07866E-04 (-0.000107839 -0.000107839)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.61 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 57 degrees of freedom
# Null hypothesis probability = 1.220125e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.346 (-199.362 -199.362)
Norm : 1.51487 (-1.51797 1.59876)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.03 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 57 degrees of freedom
# Null hypothesis probability = 1.001200e-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
Double BB
R1^2/D10^2 : 2.44263E-02 (-0.00840075 9.88462e+06)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 9.16198E-05 (-9.1985e-05 -9.1985e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.39 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 55 degrees of freedom
# Reduced chi-squared = 1.266 for 55 degrees of freedom
# Reduced chi-squared = 1.262 for 55 degrees of freedom
# Null hypothesis probability = 8.746064e-02
# Null hypothesis probability = 8.882218e-02
# Null hypothesis probability = 9.176602e-02
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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.06582 ( 0.945909 2.94971 )
Norm@50keV : 1.78175E-04 ( -0.000178643 0.00425912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.28 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.274895e-01
Photon flux (15-150 keV) in 0.064 sec: 8.57365E-02 ( -0.0869812 0.460467 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01265e-09 ( -1.01135e-09 2.12916e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.92835 ( 2.92833 5.82366 )
Epeak [keV] : 9999.35 ( -9999.35 -9999.35 )
Norm@50keV : 8.64646E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.15 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 56 degrees of freedom
# Null hypothesis probability = 1.114131e-01
Photon flux (15-150 keV) in 0.064 sec: 0.221213 0.186643 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87208e-09 ( -1.27756e-09 2.37277e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : 1.99709 ( -1.99995 -1.99995 )
Epeak [keV] : 136.139 ( -136.004 -136.004 )
Norm@50keV : 2.77299E-03 ( -0.00273512 2.71326e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.29 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.308205e-02
Photon flux (15-150 keV) in 0.064 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] : 200.000 (-200 -200)
R^2/D10^2 : 1.07866E-04 (-0.000107839 -0.000107839)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.61 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 57 degrees of freedom
# Null hypothesis probability = 1.220125e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.346 (-199.362 -199.362)
Norm : 1.51487 (-1.51797 1.59876)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.03 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 57 degrees of freedom
# Null hypothesis probability = 1.001200e-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
Double BB
R1^2/D10^2 : 2.44263E-02 (-0.00840075 9.88462e+06)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 9.16198E-05 (-9.1985e-05 -9.1985e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.39 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 55 degrees of freedom
# Reduced chi-squared = 1.266 for 55 degrees of freedom
# Reduced chi-squared = 1.262 for 55 degrees of freedom
# Null hypothesis probability = 8.746064e-02
# Null hypothesis probability = 8.882218e-02
# Null hypothesis probability = 9.176602e-02
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:
Fri Aug 14 08:01:03 EDT 2015