batgrbproduct analysis for trigger=1014012
batgrbproduct Analysis for Trigger=1014012
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): Tue Dec 22 17:15:05 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1014012/GCN5_download_cron
======================================================================
Trigger: 01014012 Segment: 000
BAT Trigger Time: 630268920 [s; MET]
Trigger Stop: 630268984 [s; MET]
UTC: 2020-12-21T18:41:33.807060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 278.204768723876 Dec: 34.4108657935914 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.16
Flight Position: [ source = BAT ]
RA: 278.204768723876 Dec: 34.4108657935914 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 278.129227441798 Dec: 34.4225561301826 [deg; J2000]
{ 18h 32m 31.0s , +34d 25' 21.2" }
+/- 3.45956838552088 [arcmin] (estimated 90% radius based on SNR)
+/- 1.90720063172398 [arcmin] (formal 1-sigma fit error)
SNR: 5.16519909254338
Angular difference between Flight and Ground position is 3.804283 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 22.4639998674393 +/- 15.1295376268008
Measured from: 26.4720001220703
to: 48.9359999895096 [s; relative to TRIGTIME]
T50: 16.8319997787476 +/- 14.6438726615048
Measured from: 32.6160001754761
to: 49.4479999542236 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 61.1399999856949
to: 62.1399999856949 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.7039999961853
to: 65.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.124110 0.226239 0.075737 0.027508
0.043474 0.043990 0.037855 0.033595 [error]
Peak 0.018038 0.013994 0.002230 0.010872
0.006893 0.007136 0.006108 0.005322 [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 3.81e-08 6.62e-08 8.79e-08 2.38e-07 2.56e-07 4.30e-07 erg/cm2
Error 1.61e-08 1.95e-08 3.44e-08 1.90e-07 8.51e-08 2.24e-07 erg/cm2
Peak flux Power-law 1.32e-01 9.20e-02 4.22e-02 2.70e-02 2.79e-01 2.93e-01 ph/cm2/s
Error 9.40e-02 7.38e-02 4.49e-02 5.90e-02 1.63e-01 1.76e-01 ph/cm2/s
Fluence Cutoff-PL 2.97e-08 1.05e-07 1.52e-08 5.99e-12 1.50e-07 1.50e-07 erg/cm2
Error 1.84e-08 3.18e-08 5.68e-08 5.67e-08 8.81e-08 1.10e-07 erg/cm2
Peak flux Cutoff-PL 1.18e-01 1.17e-01 3.39e-02 1.87e-03 2.71e-01 2.71e-01 ph/cm2/s
Error 1.08e-01 6.29e-02 4.65e-02 5.21e-02 2.16e-01 1.57e-01 ph/cm2/s
Fluence Band 3.24e-08 9.76e-08 6.41e-08 5.23e-08 2.17e-07 2.48e-07 erg/cm2
Error 1.69e-08 3.00e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 2.12e-02 3.11e-02 1.38e-02 1.18e-03 6.72e-02 6.73e-02 ph/cm2/s
Error 1.11e-02 -------- -------- -------- 1.98e-02 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.592 0.458 - - 6.96e-04 2.16e-04 76.350 57
CPL -6.795 0.000 34.5 0.0 1.96e+02 0.00e+00 72.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.126 1.321 - - 1.75e-03 1.41e-03 65.070 57
CPL 0.236 0.000 34.8 0.0 2.61e-02 0.00e+00 64.590 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 39.360 25.704 65.064
T90 22.464 26.472 48.936
T50 16.832 32.616 49.448
Peak 1.000 61.140 62.140
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
278.1292 +34.4226 0.0371 22.9 -30.7 0.4359 5.2 TRIG_01014012
------------------------------------------
Foreground time interval of the image:
25.704 65.064 (delta_t = 39.360 [sec])
Background time interval of the image:
-239.000 25.704 (delta_t = 264.704 [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 25.704 sec. to 65.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59176 ( -0.452071 0.463763 )
Norm@50keV : 6.95629E-04 ( -0.000217484 0.00021468 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.35 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.45e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 39.36 sec: 8.91551E-02 ( -0.0261479 0.0262119 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56437e-07 ( -8.32153e-08 8.69502e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.704 sec. to 65.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.79550 ( )
Epeak [keV] : 34.5274 ( )
Norm@50keV : 195.773 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 72.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.20e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 39.36 sec: 7.56024E-02 ( -0.0229161 0.0304656 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50334e-07 ( -4.56844e-08 1.3045e-07 ) ergs/cm2
Band function
Time interval is from 25.704 sec. to 65.064 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.31338 ( -2.35328 3.43075 )
beta : -2.85419 ( 9.37167 19.3713 )
Epeak [keV] : 35.1489 ( -9.50392 7.91459 )
Norm@50keV : 5.18113 ( -5.05007 1.73924 )
------------------------------------------------------------
Photon flux (15-150 keV) in 39.36 sec: 8.80879E-02 ( 6.91191 -0.0243435 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17467e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6694 (-2.59815 4.26133)
R^2/D10^2 : 3.66329E-02 (-0.0262598 0.0673138)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 73.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.49e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.406e-08 2.084e-08
25- 50 9.256e-08 5.440e-08
50-150 5.810e-08 4.180e-08
15-150 1.847e-07 9.691e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 141.038 (-83.1505 -131.519)
Norm : 0.368009 (-0.117251 0.178727)
------------------------------------------------------------
#Fit statistic : Chi-Squared 75.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.35e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.738e-08 2.257e-08
25- 50 6.866e-08 4.080e-08
50-150 1.320e-07 8.325e-08
15-150 2.381e-07 1.496e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 27.1773 (-24.7373 -24.7373)
R1^2/D10^2 : 5.50757E-04 (-0.000591208 0.0757785)
kT2 [keV] : 8.67108 (-8.6551 4.60065)
R2^2/D10^2 : 6.24099E-02 (-0.0629174 -0.0629174)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.56e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.805e-08 2.783e-08
25- 50 8.620e-08 6.410e-08
50-150 1.082e-07 6.386e-08
15-150 2.324e-07 1.504e-07
Peak spectrum fit
Power-law model
Time interval is from 61.140 sec. to 62.140 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12603 ( -1.01906 1.6223 )
Norm@50keV : 1.75149E-03 ( -0.00141462 0.00140784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.07 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.16e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.279155 ( -0.163092 0.163895 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63207e-08 ( -1.09841e-08 1.30719e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.140 sec. to 62.140 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.235976 ( )
Epeak [keV] : 34.8400 ( )
Norm@50keV : 2.60770E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.59 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.02e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.270790 ( -0.27079 0.161767 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40202e-08 ( -8.78923e-09 1.40873e-08 ) ergs/cm2
Band function
Time interval is from 61.140 sec. to 62.140 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.308772 ( 1.18576 1.18576 )
beta : -9.94534 ( 9.45745 19.4575 )
Epeak [keV] : 34.4249 ( -20.9109 159.171 )
Norm@50keV : 2.36598E-02 ( -0.0269825 1.05093e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 6.72280E-02 ( 6.93277 -0.0198307 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04172e-09 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.96172 (-4.43981 7.96999)
R^2/D10^2 : 0.214204 (-0.214203 2.8122)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.66 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.27e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.342e-09 2.303e-09
25- 50 7.056e-09 4.815e-09
50-150 2.657e-09 2.565e-09
15-150 1.306e-08 9.125e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 48.4798 (-48.4646 -48.4646)
Norm : 1.65383 (-1.65405 4.09292)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.74 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.25e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.014e-09 2.636e-09
25- 50 5.702e-09 3.738e-09
50-150 5.375e-09 5.370e-09
15-150 1.509e-08 1.212e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.23601 (-3.22133 35.4149)
R1^2/D10^2 : 3.88361 (-3.94361 -3.94361)
kT2 [keV] : 10.0399 (-10.0407 -10.0407)
R2^2/D10^2 : 0.123795 (-0.123799 2.616)
------------------------------------------------------------
#Fit statistic : Chi-Squared 64.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.78e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.690e-09 2.221e-09
25- 50 6.579e-09 5.030e-09
50-150 3.360e-09 2.355e-09
15-150 1.363e-08 1.171e-08
Plot creation:
Tue Dec 22 17:19:49 EST 2020