batgrbproduct analysis for trigger=888312
batgrbproduct Analysis for Trigger=888312
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 Feb 10 13:59:18 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger888312/GCN5_download_cron
======================================================================
Trigger: 00888312 Segment: 000
BAT Trigger Time: 571415344 [s; MET]
Trigger Stop: 571415408 [s; MET]
UTC: 2019-02-09T14:28:41.610460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 285.97172123146 Dec: 3.24167223441573 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.03
Flight Position: [ source = BAT ]
RA: 285.97172123146 Dec: 3.24167223441573 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 286.000097594207 Dec: 3.20478380895878 [deg; J2000]
{ 19h 04m 00.0s , +03d 12' 17.2" }
+/- 3.83925088220519 [arcmin] (estimated 90% radius based on SNR)
+/- 2.29365188968555 [arcmin] (formal 1-sigma fit error)
SNR: 4.45123510293486
Angular difference between Flight and Ground position is 2.790760 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.222863 0.220445 0.090185 -0.043096
0.062671 0.063633 0.054580 0.046959 [error]
Peak 0.222863 0.220445 0.090185 -0.043096
0.062671 0.063633 0.054580 0.046959 [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 6.32e-08 7.82e-08 7.03e-08 1.10e-07 2.50e-07 3.20e-07 erg/cm2
Error 2.66e-08 2.90e-08 4.32e-08 1.46e-07 1.07e-07 1.93e-07 erg/cm2
Peak flux Power-law 3.23e-02 2.21e-02 9.95e-03 6.21e-03 6.74e-02 7.06e-02 ph/cm2/s
Error 1.38e-02 8.07e-03 5.94e-03 7.74e-03 2.38e-02 2.53e-02 ph/cm2/s
Fluence Cutoff-PL 6.07e-08 1.12e-07 2.05e-08 8.41e-11 1.93e-07 1.93e-07 erg/cm2
Error 3.07e-08 4.52e-08 4.41e-08 1.79e-08 8.48e-08 8.57e-08 erg/cm2
Peak flux Cutoff-PL 2.97e-02 3.23e-02 3.41e-03 7.57e-06 6.54e-02 6.54e-02 ph/cm2/s
Error 1.55e-02 1.32e-02 6.48e-03 1.29e-03 2.22e-02 2.22e-02 ph/cm2/s
Fluence Band 5.98e-08 1.11e-07 2.83e-08 4.39e-10 2.00e-07 2.00e-07 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 2.157 0.618 - - 4.16e-04 1.97e-04 76.080 57
CPL -3.001 0.775 30.7 10.7 1.24e+00 5.05e+05 71.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.157 0.618 - - 4.16e-04 1.97e-04 76.080 57
CPL -3.001 0.775 30.7 10.7 1.24e+00 5.05e+05 71.870 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
286.0001 +3.2048 0.0432 29.7 -18.6 0.5833 4.5 TRIG_00888312
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15722 ( -0.560429 0.675635 )
Norm@50keV : 4.16248E-04 ( -0.000196265 0.000198048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.08 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.649249e-02
Photon flux (15-150 keV) in 64 sec: 6.74058E-02 ( -0.0237602 0.0238032 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49538e-07 ( -1.02074e-07 1.12464e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.00139 ( 2.0222 3.57308 )
Epeak [keV] : 30.6909 ( -8.87951 12.4761 )
Norm@50keV : 1.23796 ( -1.14997 1.01097e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.87 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 56 degrees of freedom
# Null hypothesis probability = 7.505119e-02
Photon flux (15-150 keV) in 64 sec: 6.54265E-02 ( -0.0219993 0.0224774 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93089e-07 ( -7.71091e-08 9.24512e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.08006 -5 )
beta : -3.41827 ( 3.41992 1.27548 )
Epeak [keV] : 27.4564 ( -6.92721 7.30046 )
Norm@50keV : 53.8336 ( -17.118 292.809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.16 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 55 degrees of freedom
# Null hypothesis probability = 7.027948e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00333e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.05023 (-2.12165 2.93739)
R^2/D10^2 : 8.19900E-02 (-0.0819912 0.193461)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.06 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 57 degrees of freedom
# Null hypothesis probability = 8.637664e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.178e-08 3.930e-08
25- 50 1.093e-07 6.896e-08
50-150 2.930e-08 2.292e-08
15-150 2.004e-07 1.244e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.6202 (-21.4 75.6719)
Norm : 0.443568 (-0.201208 0.369377)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.25 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 57 degrees of freedom
# Null hypothesis probability = 6.210336e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.604e-08 3.954e-08
25- 50 8.836e-08 5.606e-08
50-150 7.135e-08 5.936e-08
15-150 2.258e-07 1.491e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68534 (-7.72975 -7.72975)
R1^2/D10^2 : 5.75418E-02 (-0.0572948 -0.0572948)
kT2 [keV] : 8.60504 (-8.48471 -8.48471)
R2^2/D10^2 : 2.64115E-02 (-0.0257628 -0.0257628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.06 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 55 degrees of freedom
# Null hypothesis probability = 6.112473e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.188e-08 1.218e-03
25- 50 1.092e-07 1.167e-02
50-150 2.988e-08 2.920e-01
15-150 2.009e-07 2.620e-01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15722 ( -0.560429 0.675635 )
Norm@50keV : 4.16248E-04 ( -0.000196265 0.000198048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.08 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.649249e-02
Photon flux (15-150 keV) in 64 sec: 6.74058E-02 ( -0.0237602 0.0238032 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49538e-07 ( -1.02074e-07 1.12464e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.00139 ( 2.0222 3.57308 )
Epeak [keV] : 30.6909 ( -8.96998 12.4909 )
Norm@50keV : 1.23796 ( -1.14997 1.01097e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.87 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 56 degrees of freedom
# Null hypothesis probability = 7.505119e-02
Photon flux (15-150 keV) in 64 sec: 6.54265E-02 ( -0.0219993 0.0224774 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93089e-07 ( -7.71091e-08 9.24512e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.08006 -5 )
beta : -3.41827 ( 3.41992 1.27548 )
Epeak [keV] : 27.4564 ( -6.92721 7.30046 )
Norm@50keV : 53.8336 ( -17.118 292.809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.16 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 55 degrees of freedom
# Null hypothesis probability = 7.027948e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00333e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.05023 (-2.12165 2.93739)
R^2/D10^2 : 8.19900E-02 (-0.0819912 0.193461)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.06 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 57 degrees of freedom
# Null hypothesis probability = 8.637664e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.178e-08 3.786e-08
25- 50 1.093e-07 6.646e-08
50-150 2.930e-08 2.338e-08
15-150 2.004e-07 1.260e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.6202 (-21.4 75.6719)
Norm : 0.443568 (-0.201208 0.369377)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.25 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 57 degrees of freedom
# Null hypothesis probability = 6.210336e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.604e-08 4.202e-08
25- 50 8.836e-08 5.600e-08
50-150 7.135e-08 5.901e-08
15-150 2.258e-07 1.486e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68534 (-7.72975 -7.72975)
R1^2/D10^2 : 5.75418E-02 (-0.0572948 -0.0572948)
kT2 [keV] : 8.60504 (-8.48471 -8.48471)
R2^2/D10^2 : 2.64115E-02 (-0.0257628 -0.0257628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.06 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 55 degrees of freedom
# Null hypothesis probability = 6.112473e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.188e-08 1.182e-03
25- 50 1.092e-07 1.131e-02
50-150 2.988e-08 2.588e-01
15-150 2.009e-07 2.767e-01
Plot creation:
Sun Feb 10 14:04:02 EST 2019