batgrbproduct analysis for trigger=883832
batgrbproduct Analysis for Trigger=883832
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 16:16:27 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger883832/GCN5_download_cron
======================================================================
Trigger: 00883832 Segment: 000
BAT Trigger Time: 569192245.44 [s; MET]
Trigger Stop: 569192245.696 [s; MET]
UTC: 2019-01-14T20:57:03.190000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.5096952529563 Dec: -26.938758821296 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 25.36
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 25.36
Flight Position: [ source = BAT ]
RA: 54.5096952529563 Dec: -26.938758821296 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.502995751585 Dec: -26.9381939583958 [deg; J2000]
{ 03h 38m 00.7s , -26d 56' 17.5" }
+/- 0.396807980535716 [arcmin] (estimated 90% radius based on SNR)
+/- 0.128872026770839 [arcmin] (formal 1-sigma fit error)
SNR: 113.91343664008
Angular difference between Flight and Ground position is 0.359953 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 361.459999918938 +/- 11.7360333432713
Measured from: 0.288000106811523
to: 361.748000025749 [s; relative to TRIGTIME]
T50: 49.0719999074936 +/- 1.47339065076633
Measured from: 3.14400005340576
to: 52.2159999608994 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.23199999332428
to: 1.23199999332428 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.60400009155273
to: 703.191999912262 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 41.600422 48.878760 36.983300 11.459671
0.197109 0.209919 0.194058 0.178226 [error]
Peak 2.324999 4.294172 4.863500 1.830169
0.026597 0.036545 0.041352 0.033084 [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 1.02e-05 1.97e-05 2.93e-05 9.40e-05 8.26e-05 1.53e-04 erg/cm2
Error 3.22e-07 3.59e-07 3.47e-07 2.84e-06 9.57e-07 2.77e-06 erg/cm2
Peak flux Power-law 2.01e+01 2.93e+01 3.17e+01 6.41e+01 1.01e+02 1.45e+02 ph/cm2/s
Error 6.97e-01 6.08e-01 4.38e-01 2.05e+00 1.53e+00 2.14e+00 ph/cm2/s
Fluence Cutoff-PL 1.02e-05 1.97e-05 2.93e-05 9.02e-05 8.26e-05 1.48e-04 erg/cm2
Error 3.22e-07 3.60e-07 3.46e-07 -------- 9.54e-07 -------- erg/cm2
Peak flux Cutoff-PL 2.01e+01 2.93e+01 3.17e+01 6.37e+01 1.01e+02 1.45e+02 ph/cm2/s
Error -------- 6.09e-01 -------- -------- 1.52e+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 1.426 0.025 - - 1.21e-02 1.59e-04 88.740 57
CPL 1.422 0.025 10000.0 0.0 1.22e-02 1.49e-04 89.770 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.886 0.027 - - 8.79e-01 1.33e-02 33.630 57
CPL 0.879 0.027 9999.4 0.0 8.85e-01 2.12e-02 33.850 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: 154.304000 sec.
T50 in the 50-300 keV band: 14.592000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 709.796 -6.604 703.192
T90 361.460 0.288 361.748
T50 49.072 3.144 52.216
Peak 1.000 0.232 1.232
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.5030 -26.9382 0.0017 14.4 18.2 73.5693 113.9 TRIG_00883832
------------------------------------------
Foreground time interval of the image:
-6.604 13.161 (delta_t = 19.765 [sec])
Background time interval of the image:
-239.440 -6.604 (delta_t = 232.836 [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
Multiple GTIs in the spectrum
tstart tstop
-6.604000 652.170000
653.560000 703.192000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42553 ( -0.0246832 0.024494 )
Norm@50keV : 1.21252E-02 ( -0.00015911 0.000158228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.74 using 59 PHA bins.
# Reduced chi-squared = 1.557 for 57 degrees of freedom
# Null hypothesis probability = 4.507199e-03
Photon flux (15-150 keV) in 708.4 sec: 1.48539 ( -0.0247113 0.0248618 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.25761e-05 ( -9.568e-07 9.56999e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-6.604000 652.170000
653.560000 703.192000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42188 ( -0.0227701 0.0269657 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.21656E-02 ( -0.000158577 0.000139831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.77 using 59 PHA bins.
# Reduced chi-squared = 1.603 for 56 degrees of freedom
# Null hypothesis probability = 2.801663e-03
Photon flux (15-150 keV) in 708.4 sec: 1.48394 ( -0.02467 0.02486 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.25867e-05 ( -9.49964e-07 9.57048e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-6.604000 652.170000
653.560000 703.192000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13452 ( 1.13452 1.13452 )
beta : -1.42550 ( -0.0245488 0.0246186 )
Epeak [keV] : 33.5035 ( -33.5071 -33.5071 )
Norm@50keV : 2.50265E-02 ( -0.00860046 1.16034e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.74 using 59 PHA bins.
# Reduced chi-squared = 1.614 for 55 degrees of freedom
# Null hypothesis probability = 2.660973e-03
Photon flux (15-150 keV) in 708.4 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] : 22.6578 ( )
R^2/D10^2 : 3.82989E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1909.16 using 59 PHA bins.
# Reduced chi-squared = 33.4940 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.542e-06 7.474e-08
25- 50 1.368e-05 2.940e-07
50-150 5.247e-05 7.828e-07
15-150 6.869e-05 8.642e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 6.41339 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 439.77 using 59 PHA bins.
# Reduced chi-squared = 7.7152 for 57 degrees of freedom
# Null hypothesis probability = 1.639724e-60
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.131e-05 1.700e-07
25- 50 2.176e-05 3.400e-07
50-150 4.773e-05 7.226e-07
15-150 8.081e-05 1.240e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.80276 (-0.335582 0.348406)
R1^2/D10^2 : 1.12782 (-0.175877 0.2142)
kT2 [keV] : 35.7858 (-1.4589 1.64118)
R2^2/D10^2 : 7.23217E-03 (-0.000976279 0.00106325)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.17 using 59 PHA bins.
# Reduced chi-squared = 1.312 for 55 degrees of freedom
# Null hypothesis probability = 6.003947e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.544e-06 4.853e-07
25- 50 2.048e-05 4.534e-07
50-150 5.334e-05 9.103e-07
15-150 8.337e-05 1.311e-06
Peak spectrum fit
Power-law model
Time interval is from 0.232 sec. to 1.232 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.885755 ( -0.026708 0.0265964 )
Norm@50keV : 0.878827 ( -0.0133008 0.013249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.63 using 59 PHA bins.
# Reduced chi-squared = 0.5900 for 57 degrees of freedom
# Null hypothesis probability = 9.942009e-01
Photon flux (15-150 keV) in 1 sec: 100.862 ( -1.52384 1.52734 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.91785e-06 ( -1.39756e-07 1.39825e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.232 sec. to 1.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.879133 ( -0.0276523 0.0261293 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 0.884713 ( -0.0134521 0.0288988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.85 using 59 PHA bins.
# Reduced chi-squared = 0.6044 for 56 degrees of freedom
# Null hypothesis probability = 9.916374e-01
Photon flux (15-150 keV) in 1 sec: 100.817 ( -1.5234 1.525 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.84445e-11 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.232 sec. to 1.232 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99992 ( -4.99992 -4.99992 )
beta : -0.886624 ( -0.0266492 0.026807 )
Epeak [keV] : 23.9365 ( -23.9365 4.14736 )
Norm@50keV : 6.71189E+04 ( -910.185 8.91081e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.92 using 59 PHA bins.
# Reduced chi-squared = 0.5986 for 55 degrees of freedom
# Null hypothesis probability = 9.921017e-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] : 27.0635 ( )
R^2/D10^2 : 1.96011 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 830.08 using 59 PHA bins.
# Reduced chi-squared = 14.563 for 57 degrees of freedom
# Null hypothesis probability = 1.045222e-137
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.387e-07 7.500e-09
25- 50 1.408e-06 3.000e-08
50-150 7.528e-06 1.340e-07
15-150 9.175e-06 1.395e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 436.389 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1922.04 using 59 PHA bins.
# Reduced chi-squared = 33.7201 for 57 degrees of freedom
# Null hypothesis probability = 0.000000e+00
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.087e-06 1.750e-08
25- 50 2.090e-06 3.300e-08
50-150 4.584e-06 7.250e-08
15-150 7.761e-06 1.180e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.58544 (-0.677762 0.728001)
R1^2/D10^2 : 25.0457 (-4.8699 6.35143)
kT2 [keV] : 44.1067 (-2.87611 3.60174)
R2^2/D10^2 : 0.409932 (-0.0819846 0.0893029)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.58 using 59 PHA bins.
# Reduced chi-squared = 0.7379 for 55 degrees of freedom
# Null hypothesis probability = 9.267374e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.571e-07 3.285e-08
25- 50 1.750e-06 5.300e-08
50-150 7.695e-06 2.130e-07
15-150 1.000e-05 2.175e-07
Plot creation:
Tue Jan 15 16:21:58 EST 2019