batgrbproduct analysis for trigger=805318
batgrbproduct Analysis for Trigger=805318
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jan 16 14:40:28 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger805318/GCN5_download_cron
======================================================================
Trigger: 00805318 Segment: 000
BAT Trigger Time: 537682584 [s; MET]
Trigger Stop: 537682648 [s; MET]
UTC: 2018-01-15T04:16:03.681260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 12.0731321155951 Dec: -15.607820379834 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.76
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.76
Flight Position: [ source = BAT ]
RA: 12.0731321155951 Dec: -15.607820379834 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 12.0396682761276 Dec: -15.6323281609371 [deg; J2000]
{ 00h 48m 09.5s , -15d 37' 56.4" }
+/- 1.8344796229893 [arcmin] (estimated 90% radius based on SNR)
+/- 0.677259134189621 [arcmin] (formal 1-sigma fit error)
SNR: 12.7841362713775
Angular difference between Flight and Ground position is 2.429276 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 41.1319999694824 +/- 3.11285851853654
Measured from: 27.7760001420975
to: 68.9080001115799 [s; relative to TRIGTIME]
T50: 30.7839999198914 +/- 2.89306068287936
Measured from: 33.6920001506805
to: 64.4760000705719 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 30.7519999742508
to: 31.7519999742508 [s; relative to TRIGTIME]
Total Fluence
Measured from: 26.4919999837875
to: 70.555999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.365358 0.518110 0.274148 0.080486
0.048920 0.051144 0.044970 0.039769 [error]
Peak 0.022421 0.026977 0.016515 0.010409
0.007436 0.007575 0.006594 0.005809 [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 1.24e-07 2.04e-07 2.56e-07 6.36e-07 7.62e-07 1.22e-06 erg/cm2
Error 2.29e-08 2.39e-08 4.56e-08 2.38e-07 1.06e-07 2.79e-07 erg/cm2
Peak flux Power-law 1.84e-01 1.90e-01 1.39e-01 1.64e-01 5.77e-01 6.77e-01 ph/cm2/s
Error 1.06e-01 6.53e-02 5.76e-02 1.58e-01 1.81e-01 2.17e-01 ph/cm2/s
Fluence Cutoff-PL 1.24e-07 2.04e-07 2.55e-07 6.24e-07 7.60e-07 1.21e-06 erg/cm2
Error 2.31e-08 2.38e-08 4.28e-08 3.96e-07 1.07e-07 2.88e-07 erg/cm2
Peak flux Cutoff-PL 1.95e-01 1.93e-01 1.34e-01 1.48e-01 5.80e-01 6.68e-01 ph/cm2/s
Error 1.06e-01 6.58e-02 5.57e-02 1.86e-01 1.81e-01 2.19e-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 1.676 0.218 - - 1.86e-03 2.42e-04 37.390 57
CPL 1.683 0.219 9999.4 -0.0 1.86e-03 0.00e+00 37.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.451 0.644 - - 4.68e-03 1.50e-03 45.030 57
CPL 2.333 0.649 116.9 0.0 1.59e-03 8.16e-03 44.700 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: 52.544000 sec.
T50 in the 50-300 keV band: 36.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 44.064 26.492 70.556
T90 41.132 27.776 68.908
T50 30.784 33.692 64.476
Peak 1.000 30.752 31.752
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
12.0397 -15.6323 0.0152 27.2 129.7 1.2887 12.8 TRIG_00805318
------------------------------------------
Foreground time interval of the image:
26.492 70.101 (delta_t = 43.609 [sec])
Background time interval of the image:
-239.000 -10.290 (delta_t = 228.710 [sec])
-10.000 26.492 (delta_t = 36.492 [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 26.492 sec. to 70.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67552 ( -0.214367 0.220773 )
Norm@50keV : 1.86331E-03 ( -0.000245055 0.000239775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.39 using 59 PHA bins.
# Reduced chi-squared = 0.6560 for 57 degrees of freedom
# Null hypothesis probability = 9.792509e-01
Photon flux (15-150 keV) in 44.06 sec: 0.245389 ( -0.0287161 0.0287358 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.61692e-07 ( -1.05308e-07 1.07228e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.492 sec. to 70.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68259 ( -0.221299 0.216381 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 1.85764E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.40 using 59 PHA bins.
# Reduced chi-squared = 0.6678 for 56 degrees of freedom
# Null hypothesis probability = 9.736184e-01
Photon flux (15-150 keV) in 44.06 sec: 0.245474 ( -0.02883 0.028578 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.59819e-07 ( -1.07379e-07 1.07361e-07 ) ergs/cm2
Band function
Time interval is from 26.492 sec. to 70.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20256 ( 1.20882 1.20882 )
beta : -1.73301 ( 1.7331 0.269325 )
Epeak [keV] : 53.7004 ( -55.0294 -55.0294 )
Norm@50keV : 3.82295E-03 ( -0.00204797 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.33 using 59 PHA bins.
# Reduced chi-squared = 0.6788 for 55 degrees of freedom
# Null hypothesis probability = 9.673546e-01
Photon flux (15-150 keV) in 44.06 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] : 11.1453 (-1.56465 1.97262)
R^2/D10^2 : 7.63115E-02 (-0.0344431 0.0575341)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.12 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.979373e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.749e-08 1.917e-08
25- 50 2.516e-07 3.703e-08
50-150 1.783e-07 5.364e-08
15-150 5.173e-07 8.065e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 149.971 (-66.1437 -148.389)
Norm : 1.00558 (-0.128734 0.179366)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.80 using 59 PHA bins.
# Reduced chi-squared = 0.6808 for 57 degrees of freedom
# Null hypothesis probability = 9.689102e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.138e-07 6.061e-08
25- 50 2.109e-07 1.119e-07
50-150 4.163e-07 2.431e-07
15-150 7.410e-07 4.114e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.98793 (-1.65574 1.69934)
R1^2/D10^2 : 0.214655 (-0.10624 0.263594)
kT2 [keV] : 49.1376 (-22.5427 -49.1375)
R2^2/D10^2 : 4.07270E-04 (-0.000381712 0.00143021)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.24 using 59 PHA bins.
# Reduced chi-squared = 0.6407 for 55 degrees of freedom
# Null hypothesis probability = 9.824692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.138e-07 4.233e-08
25- 50 2.248e-07 8.407e-08
50-150 4.643e-07 2.429e-07
15-150 8.029e-07 3.155e-07
Peak spectrum fit
Power-law model
Time interval is from 30.752 sec. to 31.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45063 ( -0.660162 0.628201 )
Norm@50keV : 4.68030E-03 ( -0.0015366 0.00147302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.03 using 59 PHA bins.
# Reduced chi-squared = 0.7899 for 57 degrees of freedom
# Null hypothesis probability = 8.744540e-01
Photon flux (15-150 keV) in 1 sec: 0.576867 ( -0.180952 0.181261 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.47824e-08 ( -1.58649e-08 1.64529e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 30.752 sec. to 31.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33318 ( -0.699212 0.59955 )
Epeak [keV] : 116.854 ( -9999.36 -9999.36 )
Norm@50keV : 1.59361E-03 ( -0.00159269 0.0147318 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.70 using 59 PHA bins.
# Reduced chi-squared = 0.7983 for 56 degrees of freedom
# Null hypothesis probability = 8.610405e-01
Photon flux (15-150 keV) in 1 sec: 0.580426 ( -0.184171 0.178665 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.43106e-08 ( -1.54249e-08 1.61765e-08 ) ergs/cm2
Band function
Time interval is from 30.752 sec. to 31.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98826 ( -4.98826 -4.98826 )
beta : -1.58885 ( -1.08517 0.747443 )
Epeak [keV] : 25.1327 ( -25.1327 58.5679 )
Norm@50keV : 470.314 ( -143.613 4.40294e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.78 using 59 PHA bins.
# Reduced chi-squared = 0.8141 for 55 degrees of freedom
# Null hypothesis probability = 8.359719e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.96427e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3315 (-3.95286 18.4474)
R^2/D10^2 : 0.228278 (-0.222656 1.16311)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.8971 for 57 degrees of freedom
# Null hypothesis probability = 6.936668e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.014e-09 3.180e-09
25- 50 1.305e-08 8.215e-09
50-150 7.477e-09 5.445e-09
15-150 2.554e-08 1.585e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.354 (-199.359 -199.359)
Norm : 2.34465 (-0.727313 0.728199)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.70 using 59 PHA bins.
# Reduced chi-squared = 0.8017 for 57 degrees of freedom
# Null hypothesis probability = 8.586388e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.838e-09 3.587e-09
25- 50 1.123e-08 7.215e-09
50-150 2.463e-08 1.508e-08
15-150 4.170e-08 2.550e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.17874 (-2.48963 3.35166)
R1^2/D10^2 : 0.783113 (-0.639962 1.33124)
kT2 [keV] : 199.361 (-199.363 -199.363)
R2^2/D10^2 : 1.19883E-04 (-5.96945e-05 0.00451365)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.53 using 59 PHA bins.
# Reduced chi-squared = 0.7552 for 55 degrees of freedom
# Null hypothesis probability = 9.101804e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.804e-09 4.231e-09
25- 50 1.086e-08 7.010e-09
50-150 3.348e-08 1.174e-08
15-150 5.114e-08 1.944e-08
Plot creation:
Tue Jan 16 14:45:53 EST 2018