batgrbproduct analysis for trigger=1054627
batgrbproduct Analysis for Trigger=1054627
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): Thu Jun 10 19:39:08 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1054627/batgroup_hand_proc
======================================================================
Trigger: 01054627 Segment: 000
BAT Trigger Time: 645030250.56 [s; MET]
Trigger Stop: 645030251.584 [s; MET]
UTC: 2021-06-10T15:03:43.387320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 204.285446740885 Dec: 14.4803131180607 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.79
Image Trigger?: NO
Rate S/N Ratio: 18.8148877222268 [ if not an image trigger ]
Image S/N Ratio: 7.79
Flight Position: [ source = BAT ]
RA: 204.285446740885 Dec: 14.4803131180607 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 204.284016860347 Dec: 14.4756955581358 [deg; J2000]
{ 13h 37m 08.2s , +14d 28' 32.5" }
+/- 1.70591992025749 [arcmin] (estimated 90% radius based on SNR)
+/- 0.647891043698896 [arcmin] (formal 1-sigma fit error)
SNR: 14.1823726816602
Angular difference between Flight and Ground position is 0.289239 arcmin
Partial Coding Fraction: 0.265625 [ including projection effects ]
Duration
T90: 13.6160000562668 +/- 3.15130957354563
Measured from: -4.69599997997284
to: 8.92000007629395 [s; relative to TRIGTIME]
T50: 4.25599992275238 +/- 1.25628024155385
Measured from: -1.76799988746643
to: 2.48800003528595 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.291999936103821
to: 0.708000063896179 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.97599995136261
to: 11.3519999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.432041 0.490455 0.475982 0.151034
0.052513 0.055938 0.048528 0.040521 [error]
Peak 0.083854 0.103429 0.094521 0.018671
0.014870 0.016417 0.013957 0.010971 [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 1.27e-07 2.46e-07 3.70e-07 1.20e-06 1.04e-06 1.95e-06 erg/cm2
Error 2.43e-08 2.80e-08 4.82e-08 3.49e-07 1.18e-07 3.81e-07 erg/cm2
Peak flux Power-law 8.34e-01 8.37e-01 5.89e-01 6.57e-01 2.52e+00 2.92e+00 ph/cm2/s
Error 2.16e-01 1.38e-01 1.13e-01 2.54e-01 3.96e-01 4.54e-01 ph/cm2/s
Fluence Cutoff-PL 1.27e-07 2.48e-07 3.67e-07 1.11e-06 1.03e-06 1.85e-06 erg/cm2
Error 2.41e-08 2.81e-08 4.72e-08 4.75e-07 1.19e-07 4.88e-07 erg/cm2
Peak flux Cutoff-PL 7.91e-01 8.65e-01 6.09e-01 4.66e-01 2.50e+00 2.73e+00 ph/cm2/s
Error 2.48e-01 1.63e-01 9.95e-02 4.66e-01 4.02e-01 5.64e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 7.93e-01 8.64e-01 6.08e-01 4.74e-01 2.50e+00 2.74e+00 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 1.413 0.186 - - 6.23e-03 6.44e-04 66.110 0
CPL 1.412 0.850 9999.3 0.0 6.25e-03 4.78e-03 66.130 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.507 0.257 - - 2.01e-02 3.17e-03 47.960 0
CPL 1.196 0.835 131.9 0.0 2.90e-02 5.10e-02 0.779 0
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: 5.632000 sec.
T50 in the 50-300 keV band: 2.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 17.328 -5.976 11.352
T90 13.616 -4.696 8.920
T50 4.256 -1.768 2.488
Peak 1.000 -0.292 0.708
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
204.2840 +14.4757 0.0136 35.8 49.4 1.5436 14.2 TRIG_01054627
------------------------------------------
Foreground time interval of the image:
-5.976 11.352 (delta_t = 17.328 [sec])
Background time interval of the image:
-239.560 -5.976 (delta_t = 233.584 [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 -5.976 sec. to 11.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41325 ( -0.186704 0.185768 )
Norm@50keV : 6.23186E-03 ( -0.000645462 0.00064323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.91e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 17.33 sec: 0.761239 ( -0.0815137 0.0818102 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04076e-06 ( -1.1778e-07 1.1844e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.976 sec. to 11.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41208 ( -0.406301 1.2946 )
Epeak [keV] : 9999.32 ( -9999.36 -9999.36 )
Norm@50keV : 6.25262E-03 ( -0.00625275 0.0033095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.67e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 17.33 sec: 0.763069 ( -0.08399 0.079929 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03452e-06 ( -1.12265e-07 1.25724e-07 ) ergs/cm2
Band function
Time interval is from -5.976 sec. to 11.352 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94125 ( -4.94125 -4.94125 )
beta : -1.44300 ( -0.203962 0.197355 )
Epeak [keV] : 21.2944 ( -21.2944 6.44838 )
Norm@50keV : 1473.42 ( -151.163 2.84504e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 17.33 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] : 17.4215 (-2.63433 3.23265)
R^2/D10^2 : 5.07031E-02 (-0.0222303 0.038717)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 102.81 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.92e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.394e-08 1.170e-08
25- 50 2.433e-07 3.657e-08
50-150 5.312e-07 1.066e-07
15-150 8.284e-07 1.189e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-44.6833 -200)
Norm : 3.14551 (-0.325248 0.325248)
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.86 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.18e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.358e-07 5.780e-08
25- 50 2.611e-07 1.130e-07
50-150 5.727e-07 3.119e-07
15-150 9.696e-07 4.233e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.27992 (-1.57066 2.15847)
R1^2/D10^2 : 1.26934 (-0.828316 2.66044)
kT2 [keV] : 32.0244 (-7.89153 18.2099)
R2^2/D10^2 : 5.76762E-03 (-0.0042081 0.00887956)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.64e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.381e-07 6.741e-08
25- 50 2.324e-07 7.904e-08
50-150 7.009e-07 3.342e-07
15-150 1.071e-06 4.086e-07
Peak spectrum fit
Power-law model
Time interval is from -0.292 sec. to 0.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50681 ( -0.25477 0.258534 )
Norm@50keV : 2.01453E-02 ( -0.00317887 0.00315567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.98e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 2.51955 ( -0.395916 0.396485 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90896e-07 ( -3.24044e-08 3.26797e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.292 sec. to 0.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19560 ( -1.11673 0.552801 )
Epeak [keV] : 131.900 ( -131.9 -131.9 )
Norm@50keV : 2.89600E-02 ( -0.0289601 0.0730206 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.65 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.79e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 2.49828 ( -0.40138 0.40169 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88075e-07 ( -3.3989e-08 3.3885e-08 ) ergs/cm2
Band function
Time interval is from -0.292 sec. to 0.708 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19624 ( 1.1976 0.625032 )
beta : -4.00622 ( 9.36904 19.369 )
Epeak [keV] : 134.688 ( -67.0795 -134.61 )
Norm@50keV : 2.87559E-02 ( -0.0115323 0.0229714 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 2.49939 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.8852e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.5850 (-2.8709 3.59056)
R^2/D10^2 : 0.254324 (-0.132052 0.267093)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.19e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.284e-08 4.080e-09
25- 50 5.282e-08 1.425e-08
50-150 8.876e-08 2.733e-08
15-150 1.544e-07 3.889e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-88.9586 -199.363)
Norm : 10.3793 (-1.59053 1.59095)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.79 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.03e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.585e-08 1.479e-08
25- 50 4.972e-08 2.822e-08
50-150 1.090e-07 6.175e-08
15-150 1.846e-07 1.059e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.97588 (-2.48198 4.05416)
R1^2/D10^2 : 4.38663 (-3.57379 34.4928)
kT2 [keV] : 23.7535 (-6.49847 20.8446)
R2^2/D10^2 : 4.79171E-02 (-0.0425631 0.11076)
------------------------------------------------------------
#Fit statistic : Chi-Squared 47.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.57e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.552e-08 1.464e-08
25- 50 4.709e-08 2.333e-08
50-150 1.139e-07 6.550e-08
15-150 1.865e-07 9.840e-08
Plot creation:
Thu Jun 10 19:45:52 EDT 2021