batgrbproduct analysis for trigger=883600
batgrbproduct Analysis for Trigger=883600
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 15 03:22:37 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger883600/GCN5_download_cron
======================================================================
Trigger: 00883600 Segment: 000
BAT Trigger Time: 569128272 [s; MET]
Trigger Stop: 569128448 [s; MET]
UTC: 2019-01-14T03:10:49.754020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 65.5439596830878 Dec: 2.16981163299757 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.28
Flight Position: [ source = BAT ]
RA: 65.5439596830878 Dec: 2.16981163299757 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 65.5426429377622 Dec: 2.19606861026972 [deg; J2000]
{ 04h 22m 10.2s , +02d 11' 45.8" }
+/- 1.66101916250363 [arcmin] (estimated 90% radius based on SNR)
+/- 0.878725542128318 [arcmin] (formal 1-sigma fit error)
SNR: 14.7332128035706
Angular difference between Flight and Ground position is 1.577396 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 66.5479999780655 +/- 10.1838122893615
Measured from: 128.068000078201
to: 194.616000056267 [s; relative to TRIGTIME]
T50: 37.0039999485016 +/- 7.62324058783511
Measured from: 137.208000063896
to: 174.212000012398 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 151.075999975204
to: 152.075999975204 [s; relative to TRIGTIME]
Total Fluence
Measured from: 126.399999976158
to: 199.22000002861 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.637510 0.549399 0.312121 -0.028722
0.059585 0.061636 0.054021 0.046727 [error]
Peak 0.023794 0.019189 0.017070 0.006914
0.007660 0.007589 0.006788 0.005584 [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 1.87e-07 2.44e-07 2.34e-07 3.97e-07 7.96e-07 1.06e-06 erg/cm2
Error 2.84e-08 2.88e-08 4.99e-08 1.64e-07 1.15e-07 2.24e-07 erg/cm2
Peak flux Power-law 1.79e-01 1.80e-01 1.27e-01 1.42e-01 5.41e-01 6.27e-01 ph/cm2/s
Error 1.04e-01 6.36e-02 5.65e-02 1.40e-01 1.80e-01 2.12e-01 ph/cm2/s
Fluence Cutoff-PL 1.79e-07 2.65e-07 2.21e-07 1.24e-07 7.42e-07 7.89e-07 erg/cm2
Error 3.07e-08 3.86e-08 5.91e-08 2.40e-07 1.26e-07 2.74e-07 erg/cm2
Peak flux Cutoff-PL 1.88e-01 1.82e-01 1.22e-01 1.29e-01 5.44e-01 6.25e-01 ph/cm2/s
Error 1.04e-01 6.44e-02 5.67e-02 -------- 1.81e-01 2.04e-01 ph/cm2/s
Fluence Band 1.78e-07 2.60e-07 2.26e-07 1.56e-07 7.56e-07 8.24e-07 erg/cm2
Error -------- -------- -------- -------- 1.28e-07 -------- 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 2.062 0.220 - - 1.18e-03 1.84e-04 48.580 57
CPL 1.401 0.888 35.9 0.0 2.94e-03 0.00e+00 46.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.503 0.663 - - 4.33e-03 1.51e-03 39.680 57
CPL 2.334 0.668 117.9 0.0 1.61e-03 8.76e-03 39.210 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 72.820 126.400 199.220
T90 66.548 128.068 194.616
T50 37.004 137.208 174.212
Peak 1.000 151.076 152.076
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
65.5426 +2.1961 0.0131 23.2 34.3 1.4501 14.7 TRIG_00883600
------------------------------------------
Foreground time interval of the image:
126.400 182.901 (delta_t = 56.501 [sec])
Background time interval of the image:
-239.000 -193.760 (delta_t = 45.240 [sec])
-192.000 -180.140 (delta_t = 11.860 [sec])
-179.000 -105.050 (delta_t = 73.950 [sec])
-104.000 126.400 (delta_t = 230.400 [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 126.400 sec. to 199.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06226 ( -0.212153 0.22742 )
Norm@50keV : 1.18028E-03 ( -0.00018635 0.000182201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8522 for 57 degrees of freedom
# Null hypothesis probability = 7.788014e-01
Photon flux (15-150 keV) in 72.82 sec: 0.182304 ( -0.0208053 0.0208055 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.95886e-07 ( -1.13325e-07 1.16821e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 126.400 sec. to 199.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40131 ( -0.977917 0.798174 )
Epeak [keV] : 35.8914 ( )
Norm@50keV : 2.93918E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.59 using 59 PHA bins.
# Reduced chi-squared = 0.8320 for 56 degrees of freedom
# Null hypothesis probability = 8.105901e-01
Photon flux (15-150 keV) in 72.82 sec: 0.178578 ( -0.021105 0.021183 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.42116e-07 ( -1.2123e-07 1.31426e-07 ) ergs/cm2
Band function
Time interval is from 126.400 sec. to 199.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.16695 ( 1.39845 0.97459 )
beta : -2.24731 ( 9.37154 19.3715 )
Epeak [keV] : 22.2275 ( -35.8926 -35.8926 )
Norm@50keV : 100.014 ( -100.092 2245.39 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.24 using 59 PHA bins.
# Reduced chi-squared = 0.8226 for 55 degrees of freedom
# Null hypothesis probability = 8.230940e-01
Photon flux (15-150 keV) in 72.82 sec: 0.179599 ( 6.8204 -0.022269 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.55668e-07 ( -7.55158e-07 -1.3687e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.06909 (-1.31942 1.5446)
R^2/D10^2 : 0.122377 (-0.0552734 0.102843)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.04 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.714380e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.433e-07 2.760e-08
25- 50 3.082e-07 4.679e-08
50-150 1.203e-07 4.315e-08
15-150 5.717e-07 8.997e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.3476 (-16.5852 27.3884)
Norm : 0.979466 (-0.176315 0.215533)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.62 using 59 PHA bins.
# Reduced chi-squared = 0.8179 for 57 degrees of freedom
# Null hypothesis probability = 8.352515e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.779e-07 2.632e-08
25- 50 2.669e-07 3.255e-08
50-150 2.923e-07 9.980e-08
15-150 7.372e-07 1.230e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.90369 (-1.18343 1.43855)
R1^2/D10^2 : 0.930682 (-0.581298 1.98871)
kT2 [keV] : 16.5408 (-3.91403 6.61332)
R2^2/D10^2 : 8.77461E-03 (-0.00657294 0.0113354)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.93 using 59 PHA bins.
# Reduced chi-squared = 0.7988 for 55 degrees of freedom
# Null hypothesis probability = 8.578899e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.882e-07 9.595e-08
25- 50 2.500e-07 1.273e-07
50-150 3.039e-07 1.768e-07
15-150 7.422e-07 3.914e-07
Peak spectrum fit
Power-law model
Time interval is from 151.076 sec. to 152.076 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50276 ( -0.65174 0.675068 )
Norm@50keV : 4.33018E-03 ( -0.00155602 0.00146564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.68 using 59 PHA bins.
# Reduced chi-squared = 0.6962 for 57 degrees of freedom
# Null hypothesis probability = 9.607162e-01
Photon flux (15-150 keV) in 1 sec: 0.540978 ( -0.1797 0.179953 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10598e-08 ( -1.55391e-08 1.59435e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 151.076 sec. to 152.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33432 ( -0.682536 0.653667 )
Epeak [keV] : 117.857 ( -9999.36 -9999.36 )
Norm@50keV : 1.60517E-03 ( -0.00160565 0.0159169 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.21 using 59 PHA bins.
# Reduced chi-squared = 0.7002 for 56 degrees of freedom
# Null hypothesis probability = 9.568499e-01
Photon flux (15-150 keV) in 1 sec: 0.543638 ( -0.183528 0.177875 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.08874e-08 ( -1.53552e-08 1.57716e-08 ) ergs/cm2
Band function
Time interval is from 151.076 sec. to 152.076 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11532 ( 1.10704 1.10704 )
beta : -1.50323 ( 1.50627 0.653947 )
Epeak [keV] : 48.3392 ( -47.3103 -47.3103 )
Norm@50keV : 8.91787E-03 ( -0.00927079 1.38626e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.68 using 59 PHA bins.
# Reduced chi-squared = 0.7214 for 55 degrees of freedom
# Null hypothesis probability = 9.405128e-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] : 12.4129 (-5.95151 21.6043)
R^2/D10^2 : 0.109698 (-0.104635 1.04534)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.38 using 59 PHA bins.
# Reduced chi-squared = 0.7961 for 57 degrees of freedom
# Null hypothesis probability = 8.663001e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.582e-09 2.297e-09
25- 50 1.172e-08 7.445e-09
50-150 1.110e-08 8.475e-09
15-150 2.641e-08 1.754e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 (-199.362 -199.362)
Norm : 2.19650 (-0.724108 0.724898)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.18 using 59 PHA bins.
# Reduced chi-squared = 0.7050 for 57 degrees of freedom
# Null hypothesis probability = 9.553933e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.469e-09 3.490e-09
25- 50 1.052e-08 6.510e-09
50-150 2.307e-08 1.443e-08
15-150 3.907e-08 2.396e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.36864 (-3.26543 5.90265)
R1^2/D10^2 : 1.03973 (-0.94658 21.8747)
kT2 [keV] : 48.9228 (-45.8189 -48.9182)
R2^2/D10^2 : 1.24368E-03 (-0.00112717 0.0244288)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.72 using 59 PHA bins.
# Reduced chi-squared = 0.7039 for 55 degrees of freedom
# Null hypothesis probability = 9.529284e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.405e-09 3.813e-09
25- 50 9.255e-09 5.060e-09
50-150 2.922e-08 1.812e-08
15-150 4.489e-08 2.285e-08
Plot creation:
Tue Jan 15 03:27:48 EST 2019