batgrbproduct analysis for trigger=1046014
batgrbproduct Analysis for Trigger=1046014
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 Apr 30 19:10:33 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1046014/GCN5_download_cron
======================================================================
Trigger: 01046014 Segment: 000
BAT Trigger Time: 641472156.8 [s; MET]
Trigger Stop: 641472160.896 [s; MET]
UTC: 2021-04-30T10:42:09.864820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 57.1977339845647 Dec: 45.074287242736 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.71
Image Trigger?: NO
Rate S/N Ratio: 10.0498756211209 [ if not an image trigger ]
Image S/N Ratio: 8.71
Flight Position: [ source = BAT ]
RA: 57.1977339845647 Dec: 45.074287242736 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 57.1846161488093 Dec: 45.0796812789608 [deg; J2000]
{ 03h 48m 44.3s , +45d 04' 46.9" }
+/- 1.69861424705955 [arcmin] (estimated 90% radius based on SNR)
+/- 0.870396667175117 [arcmin] (formal 1-sigma fit error)
SNR: 14.2695926815179
Angular difference between Flight and Ground position is 0.643158 arcmin
Partial Coding Fraction: 0.25 [ including projection effects ]
Duration
T90: 11.5319999456406 +/- 2.8299661506428
Measured from: -1.69199979305267
to: 9.84000015258789 [s; relative to TRIGTIME]
T50: 6.63199996948242 +/- 1.40062272576995
Measured from: 1.39600014686584
to: 8.02800011634827 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.14000010490417
to: 2.14000010490417 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.71999990940094
to: 14.5960000753403 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.611189 0.725883 0.298704 0.072216
0.064470 0.066124 0.056327 0.048899 [error]
Peak 0.080153 0.073155 0.059090 0.015099
0.016086 0.016971 0.015236 0.011841 [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 2.48e-07 3.09e-07 2.79e-07 4.38e-07 9.87e-07 1.27e-06 erg/cm2
Error 3.79e-08 3.42e-08 5.43e-08 1.66e-07 1.26e-07 2.30e-07 erg/cm2
Peak flux Power-law 8.16e-01 6.51e-01 3.50e-01 2.74e-01 1.94e+00 2.09e+00 ph/cm2/s
Error 2.75e-01 1.49e-01 1.19e-01 1.79e-01 4.47e-01 4.77e-01 ph/cm2/s
Fluence Cutoff-PL 2.30e-07 3.42e-07 2.65e-07 1.11e-07 9.15e-07 9.49e-07 erg/cm2
Error 4.33e-08 4.98e-08 6.75e-08 2.29e-07 1.43e-07 2.25e-07 erg/cm2
Peak flux Cutoff-PL 7.79e-01 6.78e-01 3.60e-01 1.88e-01 1.92e+00 2.00e+00 ph/cm2/s
Error 3.10e-01 1.80e-01 1.28e-01 -------- 4.52e-01 5.20e-01 ph/cm2/s
Fluence Band 2.28e-07 3.99e-07 3.15e-07 2.79e-07 1.07e-06 1.22e-06 erg/cm2
Error -------- 5.59e-08 7.22e-08 2.97e-07 1.53e-07 -------- erg/cm2
Peak flux Band 7.63e-01 6.79e-01 3.66e-01 1.89e-01 1.92e+00 2.00e+00 ph/cm2/s
Error 3.10e-01 -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.146 0.209 - - 6.10e-03 8.68e-04 69.040 57
CPL 1.244 1.005 34.4 21.2 2.04e-02 5.70e-02 66.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.895 0.407 - - 1.35e-02 3.58e-03 45.950 57
CPL 1.558 1.201 62.8 -0.1 2.05e-02 8.70e-02 45.760 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: 8.576000 sec.
T50 in the 50-300 keV band: 5.568000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 17.316 -2.720 14.596
T90 11.532 -1.692 9.840
T50 6.632 1.396 8.028
Peak 1.000 1.140 2.140
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
57.1846 +45.0797 0.0135 43.3 -43.9 1.7556 14.3 TRIG_01046014
------------------------------------------
Foreground time interval of the image:
-2.720 14.596 (delta_t = 17.316 [sec])
Background time interval of the image:
-239.800 -2.720 (delta_t = 237.080 [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 -2.720 sec. to 14.596 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14589 ( -0.202034 0.216256 )
Norm@50keV : 6.10303E-03 ( -0.000878935 0.000857185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.32e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 17.32 sec: 0.982498 ( -0.108164 0.10824 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.86937e-07 ( -1.25061e-07 1.27309e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.720 sec. to 14.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24431 ( -1.25892 0.750835 )
Epeak [keV] : 34.4273 ( -29.8182 12.6439 )
Norm@50keV : 2.04017E-02 ( -0.0204207 0.0936246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.61e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 17.32 sec: 0.951045 ( -0.113395 0.113035 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.14751e-07 ( -1.38369e-07 1.46839e-07 ) ergs/cm2
Band function
Time interval is from -2.720 sec. to 14.596 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.799753 ( -5.03522 1.16193 )
beta : -2.77889 ( 9.37167 19.3717 )
Epeak [keV] : 34.0243 ( -8.83284 13.1465 )
Norm@50keV : 3.94014E-02 ( -0.0290699 15.6746 )
------------------------------------------------------------
Photon flux (15-150 keV) in 17.32 sec: 0.953697 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.068e-06 ( -1.06788e-06 -1.52598e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.42586 (-1.07849 1.20738)
R^2/D10^2 : 0.570879 (-0.216131 0.350452)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.42e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.748e-07 3.211e-08
25- 50 3.989e-07 5.421e-08
50-150 1.750e-07 5.246e-08
15-150 7.487e-07 1.203e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.1189 (-13.5321 21.2482)
Norm : 5.40028 (-0.939346 1.21493)
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.85e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.317e-07 3.178e-08
25- 50 3.399e-07 4.425e-08
50-150 3.489e-07 1.005e-07
15-150 9.205e-07 1.346e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.99318 (-6.53985 2.11197)
R1^2/D10^2 : 1.42250 (-0.804001 1.09564)
kT2 [keV] : 21.0529 (-13.2924 102.294)
R2^2/D10^2 : 1.24587E-02 (-0.0112547 0.517224)
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.75 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.16e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.114e-07 9.650e-08
25- 50 3.572e-07 1.560e-07
50-150 3.507e-07 1.998e-07
15-150 9.193e-07 4.068e-07
Peak spectrum fit
Power-law model
Time interval is from 1.140 sec. to 2.140 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89481 ( -0.383344 0.430914 )
Norm@50keV : 1.35500E-02 ( -0.00366698 0.00349488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.95 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.52e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.94029 ( -0.446852 0.44733 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24569e-07 ( -3.2206e-08 3.27879e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.140 sec. to 2.140 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55761 ( -1.74238 0.659942 )
Epeak [keV] : 62.8187 ( -62.6587 -62.8182 )
Norm@50keV : 2.05126E-02 ( -0.0205127 0.153405 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.76 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.34e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.92396 ( -0.45252 0.45168 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22766e-07 ( -3.32435e-08 3.3564e-08 ) ergs/cm2
Band function
Time interval is from 1.140 sec. to 2.140 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55903 ( -0.991884 1.67917 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 62.9561 ( -52.7878 -62.9561 )
Norm@50keV : 2.04653E-02 ( -0.0101601 0.154314 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.91855 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22884e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.0686 (-3.25989 4.2822)
R^2/D10^2 : 0.452453 (-0.303563 0.990607)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.69e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.395e-08 6.706e-09
25- 50 4.418e-08 1.991e-08
50-150 3.884e-08 2.145e-08
15-150 9.696e-08 3.931e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 90.5392 (-45.8015 -90.5392)
Norm : 8.81373 (-2.40582 3.66703)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.86 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.55e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.300e-08 9.118e-09
25- 50 3.895e-08 1.628e-08
50-150 5.953e-08 4.524e-08
15-150 1.215e-07 5.906e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.39283 (-2.18464 4.34328)
R1^2/D10^2 : 14.6022 (-13.4804 531.17)
kT2 [keV] : 18.4325 (-6.26698 18.0095)
R2^2/D10^2 : 7.67720E-02 (-0.0713777 0.210038)
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.22e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.572e-08 1.421e-08
25- 50 3.400e-08 1.801e-08
50-150 6.070e-08 3.943e-08
15-150 1.204e-07 6.290e-08
Plot creation:
Fri Apr 30 19:14:31 EDT 2021