batgrbproduct analysis for trigger=1051453
batgrbproduct Analysis for Trigger=1051453
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 v2.48
Process Start Time (local time): Fri May 28 11:33:52 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1051453/GCN5_download_cron
======================================================================
Trigger: 01051453 Segment: 000
BAT Trigger Time: 643792096 [s; MET]
Trigger Stop: 643792192 [s; MET]
UTC: 2021-05-27T07:07:48.910080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 172.354664489761 Dec: 31.618254634337 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.78
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.78
Flight Position: [ source = BAT ]
RA: 172.354664489761 Dec: 31.618254634337 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 172.345645317472 Dec: 31.6269398127508 [deg; J2000]
{ 11h 29m 23.0s , +31d 37' 37.0" }
+/- 1.84984462594904 [arcmin] (estimated 90% radius based on SNR)
+/- 0.63963106042818 [arcmin] (formal 1-sigma fit error)
SNR: 12.6327118797237
Angular difference between Flight and Ground position is 0.695624 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 63.2119998931885 +/- 11.1451652247028
Measured from: -4.40799987316132
to: 58.8040000200272 [s; relative to TRIGTIME]
T50: 38.9439998865128 +/- 9.39995739966743
Measured from: 2.22000014781952
to: 41.1640000343323 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 17.8639999628067
to: 18.8639999628067 [s; relative to TRIGTIME]
Total Fluence
Measured from: -17.0720000267029
to: 62.4520000219345 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.580258 0.518750 0.234738 -0.025601
0.053576 0.055193 0.048447 0.044463 [error]
Peak 0.016403 0.023621 0.015894 -0.001248
0.006130 0.006170 0.005630 0.005022 [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 1.91e-07 2.13e-07 1.69e-07 2.22e-07 6.55e-07 7.94e-07 erg/cm2
Error 2.86e-08 2.70e-08 4.32e-08 1.08e-07 9.75e-08 1.64e-07 erg/cm2
Peak flux Power-law 1.51e-01 1.48e-01 1.01e-01 1.07e-01 4.43e-01 5.07e-01 ph/cm2/s
Error 8.12e-02 5.02e-02 4.50e-02 1.02e-01 1.46e-01 1.71e-01 ph/cm2/s
Fluence Cutoff-PL 1.87e-07 2.23e-07 1.60e-07 9.88e-08 6.26e-07 6.69e-07 erg/cm2
Error 3.04e-08 3.51e-08 5.09e-08 1.42e-07 1.12e-07 2.11e-07 erg/cm2
Peak flux Cutoff-PL 1.52e-01 1.48e-01 1.00e-01 1.06e-01 4.43e-01 5.08e-01 ph/cm2/s
Error 8.35e-02 5.59e-02 4.66e-02 9.59e-02 1.46e-01 1.85e-01 ph/cm2/s
Fluence Band 1.85e-07 2.21e-07 1.61e-07 1.02e-07 6.27e-07 6.72e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.39e-01 1.61e-01 8.34e-02 6.33e-02 4.09e-01 4.54e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.48e-01 1.77e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.333 0.255 - - 8.56e-04 1.58e-04 55.750 57
CPL 1.925 0.000 7.0 0.0 1.52e-03 0.00e+00 55.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.554 0.615 - - 3.49e-03 1.23e-03 41.760 57
CPL 1.559 0.618 9999.4 0.0 3.49e-03 5.70e-02 41.760 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 79.524 -17.072 62.452
T90 63.212 -4.408 58.804
T50 38.944 2.220 41.164
Peak 1.000 17.864 18.864
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
172.3456 +31.6269 0.0153 25.9 -168.5 1.4055 12.6 TRIG_01051453
------------------------------------------
Foreground time interval of the image:
-17.072 62.452 (delta_t = 79.524 [sec])
Background time interval of the image:
-239.000 -206.700 (delta_t = 32.300 [sec])
-206.000 -17.072 (delta_t = 188.928 [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 -17.072 sec. to 62.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33274 ( -0.242919 0.267659 )
Norm@50keV : 8.56120E-04 ( -0.000159992 0.000156706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.75 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.22e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 79.52 sec: 0.152388 ( -0.0174731 0.0174735 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54655e-07 ( -9.55727e-08 9.93388e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.072 sec. to 62.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92469 ( )
Epeak [keV] : 6.98657 ( )
Norm@50keV : 1.52451E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.05e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 79.52 sec: 0.150139 ( -0.018042 0.018128 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.26074e-07 ( -1.06395e-07 1.17239e-07 ) ergs/cm2
Band function
Time interval is from -17.072 sec. to 62.452 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.89378 ( 1.8174 0.206847 )
beta : -9.37167 ( 9.37165 19.3717 )
Epeak [keV] : 9.33306 ( -1.23247 33.2789 )
Norm@50keV : 1.58508E-03 ( -0.000418122 0.000357326 )
------------------------------------------------------------
Photon flux (15-150 keV) in 79.52 sec: 0.150236 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.26575e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.76286 (-1.12928 1.31568)
R^2/D10^2 : 0.182698 (-0.0847346 0.163568)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.36 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.55e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.547e-07 3.292e-08
25- 50 2.568e-07 4.537e-08
50-150 6.100e-08 2.361e-08
15-150 4.724e-07 7.896e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.8851 (-10.8897 17.115)
Norm : 0.980404 (-0.208012 0.28623)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.07 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.10e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.788e-07 2.680e-08
25- 50 2.350e-07 3.837e-08
50-150 1.812e-07 7.360e-08
15-150 5.951e-07 9.721e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.43532 (-1.39471 1.44552)
R1^2/D10^2 : 1.32318 (-0.892449 6.17898)
kT2 [keV] : 14.7294 (-3.97639 7.11087)
R2^2/D10^2 : 9.87722E-03 (-0.00799854 0.0294603)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.92e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.902e-07 9.570e-08
25- 50 2.139e-07 1.117e-07
50-150 2.063e-07 1.246e-07
15-150 6.105e-07 3.214e-07
Peak spectrum fit
Power-law model
Time interval is from 17.864 sec. to 18.864 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55428 ( -0.60133 0.627851 )
Norm@50keV : 3.49343E-03 ( -0.00125774 0.00120389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.35e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.442796 ( -0.145598 0.145899 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28677e-08 ( -1.23036e-08 1.29063e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 17.864 sec. to 18.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55893 ( -0.608927 0.627177 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.49226E-03 ( -0.00349917 0.110552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.22e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.442854 ( -0.146898 0.145547 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26499e-08 ( -1.37921e-08 1.30547e-08 ) ergs/cm2
Band function
Time interval is from 17.864 sec. to 18.864 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.86548 ( -4.86548 -4.86548 )
beta : -1.80860 ( -1.68649 0.746449 )
Epeak [keV] : 27.0707 ( -27.0707 64.045 )
Norm@50keV : 205.496 ( -66.0466 3.51518e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.408918 ( 6.59108 -0.146295 ) 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] : 10.2224 (-3.68556 12.2576)
R^2/D10^2 : 0.186975 (-0.184333 0.814356)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.71e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.008e-09 2.537e-09
25- 50 1.028e-08 6.305e-09
50-150 5.714e-09 4.395e-09
15-150 2.000e-08 1.240e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.021 (-152.255 -199.077)
Norm : 1.79967 (-0.587404 0.936512)
------------------------------------------------------------
#Fit statistic : Chi-Squared 41.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.34e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.482e-09 2.885e-09
25- 50 8.621e-09 5.480e-09
50-150 1.890e-08 1.161e-08
15-150 3.200e-08 1.969e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.04383 (-2.85111 4.55714)
R1^2/D10^2 : 0.595492 (-0.503747 3.85596)
kT2 [keV] : 39.1424 (-28.3714 -38.3895)
R2^2/D10^2 : 1.55249E-03 (-0.00156866 0.0293074)
------------------------------------------------------------
#Fit statistic : Chi-Squared 40.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.32e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.089e-09 3.223e-09
25- 50 8.734e-09 5.595e-09
50-150 2.078e-08 1.225e-08
15-150 3.460e-08 1.695e-08
Plot creation:
Fri May 28 11:42:55 EDT 2021