batgrbproduct analysis for trigger=1064221
batgrbproduct Analysis for Trigger=1064221
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): Sun Aug 8 13:01:59 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1064221/GCN5_download_cron
======================================================================
Trigger: 01064221 Segment: 000
BAT Trigger Time: 650023448 [s; MET]
Trigger Stop: 650023560 [s; MET]
UTC: 2021-08-07T10:03:40.494060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 76.6773872559415 Dec: 58.2452268281704 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 12.28
Flight Position: [ source = BAT ]
RA: 76.6773872559415 Dec: 58.2452268281704 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 76.6655405754275 Dec: 58.2571142903212 [deg; J2000]
{ 05h 06m 39.7s , +58d 15' 25.6" }
+/- 1.45474717220503 [arcmin] (estimated 90% radius based on SNR)
+/- 0.618472220600419 [arcmin] (formal 1-sigma fit error)
SNR: 17.805934751529
Angular difference between Flight and Ground position is 0.805366 arcmin
Partial Coding Fraction: 0.28125 [ including projection effects ]
Duration
T90: 156.304000020027 +/- 214.59538571346
Measured from: 57.8160001039505
to: 214.120000123978 [s; relative to TRIGTIME]
T50: 67.8959999084473 +/- 4.97869047964397
Measured from: 75.6400001049042
to: 143.536000013351 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 70.5199999809265
to: 71.5199999809265 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.5440000295639
to: 640.052000045776 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.665376 4.446726 4.311139 1.680641
0.197842 0.205648 0.183233 0.159206 [error]
Peak 0.048786 0.038883 0.107153 0.051755
0.012677 0.014482 0.013562 0.011655 [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 9.70e-07 2.06e-06 3.44e-06 1.30e-05 9.46e-06 1.95e-05 erg/cm2
Error 9.78e-08 1.23e-07 1.74e-07 1.54e-06 4.48e-07 1.59e-06 erg/cm2
Peak flux Power-law 3.25e-01 5.04e-01 5.89e-01 1.33e+00 1.81e+00 2.74e+00 ph/cm2/s
Error 1.51e-01 1.45e-01 9.91e-02 4.98e-01 3.60e-01 4.94e-01 ph/cm2/s
Fluence Cutoff-PL 9.54e-07 2.06e-06 3.45e-06 1.21e-05 9.47e-06 1.86e-05 erg/cm2
Error 9.95e-08 1.27e-07 1.97e-07 2.80e-06 4.39e-07 2.59e-06 erg/cm2
Peak flux Cutoff-PL 3.15e-01 5.03e-01 5.95e-01 1.25e+00 1.80e+00 2.66e+00 ph/cm2/s
Error 1.88e-01 1.54e-01 1.26e-01 6.90e-01 3.75e-01 7.60e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- 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 1.263 0.084 - - 1.49e-03 7.08e-05 47.050 57
CPL 1.259 0.253 9998.3 0.0 1.50e-03 3.26e-04 47.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.776 0.340 - - 1.57e-02 3.29e-03 54.910 57
CPL 0.768 0.592 10000.0 0.0 1.58e-02 -6.21e-03 54.910 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: 90.240000 sec.
T50 in the 50-300 keV band: 54.976000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 659.596 -19.544 640.052
T90 156.304 57.816 214.120
T50 67.896 75.640 143.536
Peak 1.000 70.520 71.520
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
76.6655 +58.2571 0.0108 49.3 3.9 7.5144 17.8 TRIG_01064221
------------------------------------------
Foreground time interval of the image:
-11.499 120.401 (delta_t = 131.900 [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
Multiple GTIs in the spectrum
tstart tstop
-19.544000 324.210000
327.000000 336.190000
341.000000 352.680000
358.000000 358.120000
361.000000 378.160000
379.000000 389.680000
396.000000 418.170000
419.000000 640.052000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26309 ( -0.0849003 0.0839099 )
Norm@50keV : 1.49185E-03 ( -7.09817e-05 7.0654e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.05 using 59 PHA bins.
# Reduced chi-squared = 0.8255 for 57 degrees of freedom
# Null hypothesis probability = 8.234496e-01
Photon flux (15-150 keV) in 635.8 sec: 0.176827 ( -0.00927402 0.00931558 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.46039e-06 ( -4.47742e-07 4.48117e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-19.544000 324.210000
327.000000 336.190000
341.000000 352.680000
358.000000 358.120000
361.000000 378.160000
379.000000 389.680000
396.000000 418.170000
419.000000 640.052000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25864 ( -0.295912 0.209806 )
Epeak [keV] : 9998.34 ( -9998.32 -9998.32 )
Norm@50keV : 1.49846E-03 ( -7.00431e-05 0.000581208 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.05 using 59 PHA bins.
# Reduced chi-squared = 0.8402 for 56 degrees of freedom
# Null hypothesis probability = 7.971432e-01
Photon flux (15-150 keV) in 635.8 sec: 0.176754 ( -0.009683 0.009263 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.47297e-06 ( -4.37176e-07 4.40228e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-19.544000 324.210000
327.000000 336.190000
341.000000 352.680000
358.000000 358.120000
361.000000 378.160000
379.000000 389.680000
396.000000 418.170000
419.000000 640.052000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.40363 ( 0.94451 0.94451 )
beta : -1.26425 ( 1.26328 0.0850669 )
Epeak [keV] : 21.8525 ( -602.69 -602.69 )
Norm@50keV : 0.374787 ( -0.372878 99102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8550 for 55 degrees of freedom
# Null hypothesis probability = 7.692183e-01
Photon flux (15-150 keV) in 635.8 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] : 20.9349 ( )
R^2/D10^2 : 6.75341E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 149.44 using 59 PHA bins.
# Reduced chi-squared = 2.6218 for 57 degrees of freedom
# Null hypothesis probability = 3.194927e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.560e-07 3.799e-08
25- 50 1.826e-06 1.265e-07
50-150 5.964e-06 4.292e-07
15-150 8.147e-06 4.260e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.19739 -200)
Norm : 0.764886 (-0.0359036 0.0359036)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.211e-06 7.089e-08
25- 50 2.330e-06 1.202e-07
50-150 5.111e-06 3.004e-07
15-150 8.653e-06 4.800e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.49659 (-1.55491 1.72681)
R1^2/D10^2 : 8.41516E-02 (-0.0369894 0.0821895)
kT2 [keV] : 35.3647 (-5.69247 9.97185)
R2^2/D10^2 : 1.01344E-03 (-0.000545203 0.000821581)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.411e-07 1.650e-07
25- 50 2.154e-06 3.160e-07
50-150 6.498e-06 1.163e-06
15-150 9.492e-06 1.532e-06
Peak spectrum fit
Power-law model
Time interval is from 70.520 sec. to 71.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.776197 ( -0.361303 0.318518 )
Norm@50keV : 1.57081E-02 ( -0.00338332 0.00319685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.91 using 59 PHA bins.
# Reduced chi-squared = 0.9634 for 57 degrees of freedom
# Null hypothesis probability = 5.537171e-01
Photon flux (15-150 keV) in 1 sec: 1.80706 ( -0.356932 0.363863 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85425e-07 ( -3.13827e-08 3.13939e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 70.520 sec. to 71.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.767644 ( -0.535334 0.649611 )
Epeak [keV] : 10000.00 ( -10000 -10000 )
Norm@50keV : 1.58198E-02 ( -0.0033957 -0.0158198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.91 using 59 PHA bins.
# Reduced chi-squared = 0.9806 for 56 degrees of freedom
# Null hypothesis probability = 5.160572e-01
Photon flux (15-150 keV) in 1 sec: 1.79976 ( -0.38146 0.36865 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85443e-07 ( -3.146e-08 3.1408e-08 ) ergs/cm2
Band function
Time interval is from 70.520 sec. to 71.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.785313 ( 0.785302 0.785302 )
beta : -0.776201 ( -0.318533 0.36135 )
Epeak [keV] : 14.5475 ( -14.5477 -14.5477 )
Norm@50keV : 2.36727E-02 ( -0.0112657 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.91 using 59 PHA bins.
# Reduced chi-squared = 0.9984 for 55 degrees of freedom
# Null hypothesis probability = 4.778744e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.5562 (-6.3369 10.5696)
R^2/D10^2 : 2.55100E-02 (-0.0146581 0.0268877)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.684e-09 1.582e-09
25- 50 2.290e-08 8.195e-09
50-150 1.499e-07 5.178e-08
15-150 1.765e-07 5.944e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-35.8318 -200)
Norm : 8.01670 (-1.49926 1.49926)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.999e-08 1.184e-08
25- 50 3.845e-08 2.185e-08
50-150 8.432e-08 4.803e-08
15-150 1.428e-07 8.320e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.91175 (-2.46988 5.81068)
R1^2/D10^2 : 4.80978 (-4.60894 147.797)
kT2 [keV] : 35.5760 (-8.77037 19.6622)
R2^2/D10^2 : 1.56727E-02 (-0.0108265 0.0239985)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.367e-08 7.690e-09
25- 50 2.507e-08 1.154e-08
50-150 1.500e-07 7.355e-08
15-150 1.888e-07 9.269e-08
Plot creation:
Sun Aug 8 13:10:13 EDT 2021