batgrbproduct Analysis for Trigger=712505
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): Sat Sep 17 10:50:07 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger712505/GCN5_download_cron
======================================================================
Trigger: 00712505 Segment: 000
BAT Trigger Time: 495804636.224 [s; MET]
Trigger Stop: 495804637.248 [s; MET]
UTC: 2016-09-17T11:30:19.349940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 295.670955502867 Dec: 46.398883954926 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.62
Image Trigger?: NO
Rate S/N Ratio: 29.2574776766556 [ if not an image trigger ]
Image S/N Ratio: 8.62
Flight Position: [ source = BAT ]
RA: 295.670955502867 Dec: 46.398883954926 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 295.651732075245 Dec: 46.3998041747242 [deg; J2000]
{ 19h 42m 36.4s , +46d 23' 59.3" }
+/- 1.47766015979566 [arcmin] (estimated 90% radius based on SNR)
+/- 0.594320425956565 [arcmin] (formal 1-sigma fit error)
SNR: 17.412815667844
Angular difference between Flight and Ground position is 0.797335 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 14.5599999427795 +/- 1.83462262268703
Measured from: 0.0840001702308655
to: 14.6440001130104 [s; relative to TRIGTIME]
T50: 7.96799993515015 +/- 1.5091892197436
Measured from: 1.84000015258789
to: 9.80800008773804 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0079999566078186
to: 0.992000043392181 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.339999973773956
to: 15.3080000281334 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.248384 0.474931 0.623852 0.296775
0.043368 0.046077 0.042548 0.037215 [error]
Peak 0.057021 0.072823 0.105575 0.043801
0.011949 0.013311 0.012733 0.011394 [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 7.98e-08 2.14e-07 4.62e-07 2.60e-06 1.25e-06 3.36e-06 erg/cm2
Error 1.58e-08 2.52e-08 3.84e-08 5.25e-07 1.03e-07 5.31e-07 erg/cm2
Peak flux Power-law 4.28e-01 6.35e-01 7.02e-01 1.46e+00 2.21e+00 3.23e+00 ph/cm2/s
Error 1.47e-01 1.30e-01 9.71e-02 4.79e-01 3.26e-01 4.89e-01 ph/cm2/s
Fluence Cutoff-PL 7.96e-08 2.14e-07 4.62e-07 2.41e-06 1.25e-06 3.16e-06 erg/cm2
Error 1.59e-08 2.51e-08 3.16e-08 7.26e-07 1.03e-07 8.54e-07 erg/cm2
Peak flux Cutoff-PL 4.40e-01 6.43e-01 7.00e-01 1.42e+00 2.22e+00 3.20e+00 ph/cm2/s
Error 1.09e-01 1.31e-01 9.79e-02 5.62e-01 3.27e-01 5.80e-01 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 0.888 0.154 - - 7.06e-03 6.35e-04 67.280 57
CPL 0.885 0.161 9999.4 0.0 7.11e-03 2.40e-03 67.290 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.855 0.270 - - 1.92e-02 2.88e-03 49.500 57
CPL 0.861 0.273 9999.4 0.0 1.94e-02 7.01e-03 49.540 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: 14.528000 sec.
T50 in the 50-300 keV band: 8.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.648 -0.340 15.308
T90 14.560 0.084 14.644
T50 7.968 1.840 9.808
Peak 1.000 -0.008 0.992
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
295.6517 +46.3998 0.0110 41.3 176.9 1.6484 17.4 TRIG_00712505
------------------------------------------
Foreground time interval of the image:
-0.340 15.308 (delta_t = 15.648 [sec])
Background time interval of the image:
-60.224 -0.340 (delta_t = 59.884 [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 -0.340 sec. to 15.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.888490 ( -0.157086 0.150142 )
Norm@50keV : 7.05802E-03 ( -0.000640219 0.000629388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.28 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.654608e-01
Photon flux (15-150 keV) in 15.65 sec: 0.810058 ( -0.0727554 0.0731482 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24522e-06 ( -1.03367e-07 1.03523e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.340 sec. to 15.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.884684 ( -0.173173 0.149027 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 7.10798E-03 ( -0.00060028 0.00420705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.29 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 56 degrees of freedom
# Null hypothesis probability = 1.434521e-01
Photon flux (15-150 keV) in 15.65 sec: 0.810280 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24516e-06 ( -1.02944e-07 1.03806e-07 ) ergs/cm2
Band function
Time interval is from -0.340 sec. to 15.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -0.930657 ( -0.165595 0.167037 )
Epeak [keV] : 27.8408 ( -27.8399 7.68103 )
Norm@50keV : 233.410 ( -18.8008 1.0023e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.91 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 55 degrees of freedom
# Null hypothesis probability = 1.489844e-01
Photon flux (15-150 keV) in 15.65 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] : 26.7887 (-3.14361 3.89204)
R^2/D10^2 : 1.60470E-02 (-0.00539681 0.00759899)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.30 using 59 PHA bins.
# Reduced chi-squared = 1.654 for 57 degrees of freedom
# Null hypothesis probability = 1.380096e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-08 5.462e-09
25- 50 1.769e-07 2.754e-08
50-150 9.292e-07 1.100e-07
15-150 1.136e-06 1.221e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 3.48222 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 125.49 using 59 PHA bins.
# Reduced chi-squared = 2.2016 for 57 degrees of freedom
# Null hypothesis probability = 4.639963e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.357e-07 1.710e-08
25- 50 2.610e-07 4.053e-08
50-150 5.725e-07 1.751e-07
15-150 9.693e-07 3.725e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.56148 (-2.75849 3.96631)
R1^2/D10^2 : 0.222838 (-0.134967 0.415599)
kT2 [keV] : 46.7325 (-13.398 63.8032)
R2^2/D10^2 : 2.76093E-03 (-0.00197212 0.00426666)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.09 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 55 degrees of freedom
# Null hypothesis probability = 1.453632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.470e-08 4.151e-08
25- 50 2.260e-07 1.084e-07
50-150 9.489e-07 4.905e-07
15-150 1.250e-06 5.746e-07
Peak spectrum fit
Power-law model
Time interval is from -0.008 sec. to 0.992 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.855065 ( -0.28108 0.259363 )
Norm@50keV : 1.92446E-02 ( -0.00292528 0.00283158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
# Reduced chi-squared = 0.8685 for 57 degrees of freedom
# Null hypothesis probability = 7.492676e-01
Photon flux (15-150 keV) in 1 sec: 2.20900 ( -0.325331 0.327196 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19851e-07 ( -3.10993e-08 3.12464e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.008 sec. to 0.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.861390 ( -0.296311 0.249357 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.94342E-02 ( -0.00271997 0.0113016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.54 using 59 PHA bins.
# Reduced chi-squared = 0.8847 for 56 degrees of freedom
# Null hypothesis probability = 7.162399e-01
Photon flux (15-150 keV) in 1 sec: 2.21885 ( -0.33718 0.31718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19752e-07 ( -3.1013e-08 3.0565e-08 ) ergs/cm2
Band function
Time interval is from -0.008 sec. to 0.992 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99998 ( 9.99998 9.99998 )
beta : -0.855061 ( -0.259334 0.281081 )
Epeak [keV] : 15.3572 ( -15.3572 -15.3572 )
Norm@50keV : 2.61561 ( -0.39759 0.384851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 55 degrees of freedom
# Null hypothesis probability = 6.838017e-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] : 29.1344 (-6.27461 9.6121)
R^2/D10^2 : 3.40163E-02 (-0.0186684 0.0364719)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.46 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 57 degrees of freedom
# Null hypothesis probability = 2.320560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.598e-09 1.513e-09
25- 50 2.802e-08 8.295e-09
50-150 1.698e-07 4.185e-08
15-150 2.025e-07 4.745e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-29.6727 -200)
Norm : 9.24505 (-1.34811 1.34811)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.96 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 57 degrees of freedom
# Null hypothesis probability = 1.011469e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.303e-08 1.319e-08
25- 50 4.430e-08 2.433e-08
50-150 9.716e-08 5.530e-08
15-150 1.645e-07 9.330e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.65142 (-3.38911 5.04822)
R1^2/D10^2 : 0.941639 (-0.692099 2.93633)
kT2 [keV] : 59.4719 (-25.0776 -59.9038)
R2^2/D10^2 : 4.62485E-03 (-0.00430323 0.0140718)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523599e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.498e-08 8.895e-09
25- 50 3.845e-08 2.075e-08
50-150 1.752e-07 9.385e-08
15-150 2.286e-07 1.174e-07
Plot creation:
Mon Sep 19 11:41:42 EDT 2016