batgrbproduct analysis for trigger=845443
batgrbproduct Analysis for Trigger=845443
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): Sun Jul 1 15:29:50 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger845443/GCN5_download_cron
======================================================================
Trigger: 00845443 Segment: 000
BAT Trigger Time: 552049932.992 [s; MET]
Trigger Stop: 552049934.016 [s; MET]
UTC: 2018-06-30T11:11:51.803800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 48.8102458660383 Dec: -87.4820175920548 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.75
Image Trigger?: NO
Rate S/N Ratio: 11.5325625946708 [ if not an image trigger ]
Image S/N Ratio: 7.75
Flight Position: [ source = BAT ]
RA: 48.8102458660383 Dec: -87.4820175920548 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 48.8863133319282 Dec: -87.475801448081 [deg; J2000]
{ 03h 15m 32.7s , -87d 28' 32.9" }
+/- 0.830142127792442 [arcmin] (estimated 90% radius based on SNR)
+/- 0.276544789591404 [arcmin] (formal 1-sigma fit error)
SNR: 39.6839482366506
Angular difference between Flight and Ground position is 0.423568 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 18.8479999303818 +/- 6.47663124781276
Measured from: 1.44400012493134
to: 20.2920000553131 [s; relative to TRIGTIME]
T50: 3.23199999332428 +/- 0.616077879298968
Measured from: 3.58400011062622
to: 6.8160001039505 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.64800000190735
to: 4.64800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.355999946594238
to: 30.0240000486374 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.227547 1.194490 0.647759 0.104091
0.049185 0.049106 0.041095 0.034282 [error]
Peak 0.268510 0.270133 0.145825 0.027652
0.012784 0.013117 0.010381 0.007618 [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 4.15e-07 5.40e-07 5.16e-07 8.73e-07 1.76e-06 2.34e-06 erg/cm2
Error 3.31e-08 2.67e-08 4.17e-08 1.46e-07 9.54e-08 1.85e-07 erg/cm2
Peak flux Power-law 2.95e+00 2.19e+00 1.08e+00 7.58e-01 6.57e+00 6.97e+00 ph/cm2/s
Error 2.70e-01 1.24e-01 9.20e-02 1.28e-01 3.86e-01 3.91e-01 ph/cm2/s
Fluence Cutoff-PL 4.02e-07 5.53e-07 5.15e-07 5.90e-07 1.72e-06 2.06e-06 erg/cm2
Error 3.85e-08 3.31e-08 4.34e-08 3.08e-07 1.11e-07 3.53e-07 erg/cm2
Peak flux Cutoff-PL 2.96e+00 2.19e+00 1.08e+00 7.48e-01 6.57e+00 6.97e+00 ph/cm2/s
Error -------- -------- -------- -------- -------- 3.16e-01 ph/cm2/s
Fluence Band 3.98e-07 5.48e-07 5.07e-07 8.21e-07 1.74e-06 2.28e-06 erg/cm2
Error -------- -------- 4.34e-08 -------- -------- -------- 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 2.067 0.098 - - 6.26e-03 3.63e-04 36.270 57
CPL 1.832 0.289 32.2 0.0 8.39e-03 0.00e+00 35.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.019 0.108 - - 4.34e-02 2.78e-03 47.260 57
CPL 2.086 0.262 58.6 0.0 3.99e-02 0.00e+00 47.170 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: 7.552000 sec.
T50 in the 50-300 keV band: 2.688000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 30.380 -0.356 30.024
T90 18.848 1.444 20.292
T50 3.232 3.584 6.816
Peak 1.000 3.648 4.648
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
48.8863 -87.4758 0.0048 35.3 -147.2 2.9672 39.7 TRIG_00845443
------------------------------------------
Foreground time interval of the image:
-0.356 11.409 (delta_t = 11.765 [sec])
Background time interval of the image:
-90.891 -0.356 (delta_t = 90.535 [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 -0.356 sec. to 30.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06730 ( -0.0972003 0.0992508 )
Norm@50keV : 6.25718E-03 ( -0.000364796 0.000360959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.27 using 59 PHA bins.
# Reduced chi-squared = 0.6363 for 57 degrees of freedom
# Null hypothesis probability = 9.853633e-01
Photon flux (15-150 keV) in 30.38 sec: 0.968824 ( -0.050465 0.0506023 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.761e-06 ( -9.51222e-08 9.56569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.356 sec. to 30.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83204 ( -0.39509 0.182367 )
Epeak [keV] : 32.1715 ( )
Norm@50keV : 8.39026E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.05 using 59 PHA bins.
# Reduced chi-squared = 0.6259 for 56 degrees of freedom
# Null hypothesis probability = 9.872765e-01
Photon flux (15-150 keV) in 30.38 sec: 0.954805 ( -0.054588 0.054645 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72329e-06 ( -1.11385e-07 1.11613e-07 ) ergs/cm2
Band function
Time interval is from -0.356 sec. to 30.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.18371 ( 0.23011 0.23011 )
beta : -2.11537 ( 2.11605 0.119027 )
Epeak [keV] : 22.3792 ( -23.8948 24.5728 )
Norm@50keV : 2.14044 ( -2.14025 1307.95 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.54 using 59 PHA bins.
# Reduced chi-squared = 0.6279 for 55 degrees of freedom
# Null hypothesis probability = 9.860526e-01
Photon flux (15-150 keV) in 30.38 sec: 0.954273 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73634e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.5029 ( )
R^2/D10^2 : 0.348563 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 134.61 using 59 PHA bins.
# Reduced chi-squared = 2.3617 for 57 degrees of freedom
# Null hypothesis probability = 3.184871e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.415e-07 2.190e-08
25- 50 6.424e-07 3.828e-08
50-150 3.858e-07 5.134e-08
15-150 1.270e-06 7.003e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.9879 (-9.5665 12.1675)
Norm : 4.74721 (-0.420952 0.472515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.49 using 59 PHA bins.
# Reduced chi-squared = 0.6929 for 57 degrees of freedom
# Null hypothesis probability = 9.625943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.675e-07 2.734e-08
25- 50 5.752e-07 2.856e-08
50-150 7.064e-07 8.613e-08
15-150 1.649e-06 1.072e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.76447 (-0.847526 0.904991)
R1^2/D10^2 : 2.67524 (-1.12528 2.35085)
kT2 [keV] : 20.2433 (-3.13514 4.54717)
R2^2/D10^2 : 2.00007E-02 (-0.0110155 0.0200596)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.38 using 59 PHA bins.
# Reduced chi-squared = 0.6796 for 55 degrees of freedom
# Null hypothesis probability = 9.669309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.858e-07 6.280e-08
25- 50 5.484e-07 7.853e-08
50-150 7.537e-07 1.650e-07
15-150 1.688e-06 2.649e-07
Peak spectrum fit
Power-law model
Time interval is from 3.648 sec. to 4.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01889 ( -0.106909 0.108987 )
Norm@50keV : 4.34019E-02 ( -0.00279784 0.00276556 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.26 using 59 PHA bins.
# Reduced chi-squared = 0.8292 for 57 degrees of freedom
# Null hypothesis probability = 8.176047e-01
Photon flux (15-150 keV) in 1 sec: 6.56748 ( -0.385276 0.386478 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00676e-07 ( -2.44114e-08 2.45357e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.648 sec. to 4.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08611 ( -0.385474 0.138468 )
Epeak [keV] : 58.6005 ( )
Norm@50keV : 3.99031E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.17 using 59 PHA bins.
# Reduced chi-squared = 0.8423 for 56 degrees of freedom
# Null hypothesis probability = 7.936113e-01
Photon flux (15-150 keV) in 1 sec: 6.56719 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00516e-07 ( -1.2783e-08 2.4331e-08 ) ergs/cm2
Band function
Time interval is from 3.648 sec. to 4.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.61307 ( -4.13146 -4.13146 )
beta : -2.07791 ( -0.136855 0.119427 )
Epeak [keV] : 21.4604 ( -21.2347 21.8399 )
Norm@50keV : 1467.50 ( -1466.58 22271.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8245 for 55 degrees of freedom
# Null hypothesis probability = 8.201206e-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] : 10.1981 ( )
R^2/D10^2 : 2.67691 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 151.19 using 59 PHA bins.
# Reduced chi-squared = 2.6524 for 57 degrees of freedom
# Null hypothesis probability = 1.824241e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.706e-08 5.765e-09
25- 50 1.458e-07 9.500e-09
50-150 8.053e-08 1.147e-08
15-150 2.834e-07 1.850e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 72.1473 (-12.2656 16.4659)
Norm : 31.1717 (-3.05739 3.4771)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.90 using 59 PHA bins.
# Reduced chi-squared = 0.9983 for 57 degrees of freedom
# Null hypothesis probability = 4.787227e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.022e-08 6.495e-09
25- 50 1.287e-07 7.950e-09
50-150 1.690e-07 2.275e-08
15-150 3.779e-07 2.455e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23596 (-0.738868 0.779008)
R1^2/D10^2 : 14.6992 (-5.36175 9.46441)
kT2 [keV] : 26.1548 (-4.64342 6.95817)
R2^2/D10^2 : 5.46248E-02 (-0.0303992 0.0581511)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.21 using 59 PHA bins.
# Reduced chi-squared = 0.8038 for 55 degrees of freedom
# Null hypothesis probability = 8.508635e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.645e-08 1.285e-08
25- 50 1.235e-07 1.615e-08
50-150 1.943e-07 5.130e-08
15-150 4.043e-07 7.520e-08
Plot creation:
Sun Jul 1 15:35:15 EDT 2018