batgrbproduct analysis for trigger=1116221
batgrbproduct Analysis for Trigger=1116221
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 Jul 15 21:14:12 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1116221/GCN5_download_cron
======================================================================
Trigger: 01116221 Segment: 000
BAT Trigger Time: 679499914.048 [s; MET]
Trigger Stop: 679499914.56 [s; MET]
UTC: 2022-07-14T13:58:04.554000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 47.0721354244508 Dec: -19.334163611719 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.45
Image Trigger?: NO
Rate S/N Ratio: 15.2970585407784 [ if not an image trigger ]
Image S/N Ratio: 7.45
Flight Position: [ source = BAT ]
RA: 47.0721354244508 Dec: -19.334163611719 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 47.0861365116001 Dec: -19.3206860762519 [deg; J2000]
{ 03h 08m 20.7s , -19d 19' 14.5" }
+/- 1.27165542184305 [arcmin] (estimated 90% radius based on SNR)
+/- 0.47803890698111 [arcmin] (formal 1-sigma fit error)
SNR: 21.5783965332922
Angular difference between Flight and Ground position is 1.132398 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 50.2159999608994 +/- 7.90459211930836
Measured from: -19.4279998540878
to: 30.7880001068115 [s; relative to TRIGTIME]
T50: 16.5799999237061 +/- 0.692416041383528
Measured from: 3.46000015735626
to: 20.0400000810623 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.892000079155
to: 13.892000079155 [s; relative to TRIGTIME]
Total Fluence
Measured from: -48.2719999551773
to: 45.7480000257492 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.913392 3.159719 1.766293 0.363436
0.064768 0.067787 0.061514 0.060556 [error]
Peak 0.139085 0.187392 0.114997 0.032948
0.008645 0.009749 0.008474 0.006811 [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 9.15e-07 1.30e-06 1.38e-06 2.69e-06 4.43e-06 6.28e-06 erg/cm2
Error 5.19e-08 4.08e-08 6.55e-08 2.83e-07 1.45e-07 3.27e-07 erg/cm2
Peak flux Power-law 1.39e+00 1.29e+00 8.22e-01 8.09e-01 3.83e+00 4.31e+00 ph/cm2/s
Error 1.43e-01 8.14e-02 7.16e-02 1.42e-01 2.39e-01 2.69e-01 ph/cm2/s
Fluence Cutoff-PL 9.17e-07 1.30e-06 1.37e-06 2.65e-06 4.43e-06 6.24e-06 erg/cm2
Error 3.97e-08 4.02e-08 6.57e-08 5.06e-07 1.42e-07 5.40e-07 erg/cm2
Peak flux Cutoff-PL 1.35e+00 1.31e+00 8.32e-01 6.26e-01 3.80e+00 4.12e+00 ph/cm2/s
Error 1.66e-01 9.88e-02 7.57e-02 2.58e-01 2.50e-01 3.96e-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 1.921 0.066 - - 5.23e-03 1.74e-04 43.920 57
CPL 1.921 0.173 9998.9 0.0 5.24e-03 0.00e+00 43.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.644 0.113 - - 2.94e-02 1.96e-03 41.240 57
CPL 1.448 0.376 133.5 0.0 3.74e-02 0.00e+00 40.610 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: 136.128000 sec.
T50 in the 50-300 keV band: 16.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 94.020 -48.272 45.748
T90 50.216 -19.428 30.788
T50 16.580 3.460 20.040
Peak 1.000 12.892 13.892
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
47.0861 -19.3207 0.0089 19.5 32.1 3.6746 21.6 TRIG_01116221
------------------------------------------
Foreground time interval of the image:
-48.272 -17.978 (delta_t = 30.294 [sec])
-16.048 9.753 (delta_t = 25.801 [sec])
Background time interval of the image:
-179.048 -65.088 (delta_t = 113.960 [sec])
-60.048 -48.272 (delta_t = 11.776 [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
Multiple GTIs in the spectrum
tstart tstop
-48.272000 -17.978000
-16.048000 45.748000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92088 ( -0.0652473 0.065822 )
Norm@50keV : 5.23356E-03 ( -0.00017422 0.000173322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.92 using 59 PHA bins.
# Reduced chi-squared = 0.7705 for 57 degrees of freedom
# Null hypothesis probability = 8.979307e-01
Photon flux (15-150 keV) in 92.09 sec: 0.757814 ( -0.0252093 0.0253253 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.43218e-06 ( -1.44743e-07 1.45358e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-48.272000 -17.978000
-16.048000 45.748000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92095 ( -0.101236 0.244745 )
Epeak [keV] : 9998.93 ( )
Norm@50keV : 5.23577E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.92 using 59 PHA bins.
# Reduced chi-squared = 0.7843 for 56 degrees of freedom
# Null hypothesis probability = 8.792120e-01
Photon flux (15-150 keV) in 92.09 sec: 0.757768 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.42899e-06 ( -1.37269e-07 1.47326e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-48.272000 -17.978000
-16.048000 45.748000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01374 ( 1.13351 1.13351 )
beta : -1.95416 ( -0.0937332 0.0794835 )
Epeak [keV] : 30.8923 ( -30.4711 -30.4711 )
Norm@50keV : 2.21120E-02 ( -0.0228694 1152.67 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.52 using 59 PHA bins.
# Reduced chi-squared = 0.7730 for 55 degrees of freedom
# Null hypothesis probability = 8.905682e-01
Photon flux (15-150 keV) in 92.09 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] : 11.7344 ( )
R^2/D10^2 : 0.176259 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 313.23 using 59 PHA bins.
# Reduced chi-squared = 5.4953 for 57 degrees of freedom
# Null hypothesis probability = 4.628047e-37
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.717e-07 3.090e-08
25- 50 1.445e-06 4.973e-08
50-150 1.179e-06 9.071e-08
15-150 3.096e-06 1.082e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 88.4641 (-10.3014 12.6302)
Norm : 3.32009 (-0.177611 0.193272)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.973e-07 4.466e-08
25- 50 1.343e-06 4.328e-08
50-150 2.024e-06 1.418e-07
15-150 4.165e-06 1.929e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.38348 (-0.529943 0.555768)
R1^2/D10^2 : 1.38292 (-0.3766 0.559843)
kT2 [keV] : 24.9583 (-2.77827 3.6215)
R2^2/D10^2 : 8.17226E-03 (-0.00310765 0.00446211)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.313e-07 7.174e-08
25- 50 1.315e-06 7.736e-08
50-150 2.235e-06 3.025e-07
15-150 4.381e-06 3.301e-07
Peak spectrum fit
Power-law model
Time interval is from 12.892 sec. to 13.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64445 ( -0.111648 0.113558 )
Norm@50keV : 2.94223E-02 ( -0.00196598 0.00194939 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.24 using 59 PHA bins.
# Reduced chi-squared = 0.7234 for 57 degrees of freedom
# Null hypothesis probability = 9.424748e-01
Photon flux (15-150 keV) in 1 sec: 3.83482 ( -0.238538 0.2387 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.73792e-07 ( -1.95696e-08 1.97372e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.892 sec. to 13.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44777 ( -0.460648 0.290926 )
Epeak [keV] : 133.473 ( )
Norm@50keV : 3.73594E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.61 using 59 PHA bins.
# Reduced chi-squared = 0.7251 for 56 degrees of freedom
# Null hypothesis probability = 9.393780e-01
Photon flux (15-150 keV) in 1 sec: 3.79880 ( -0.25012 0.24993 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.69015e-07 ( -2.2349e-08 2.2111e-08 ) ergs/cm2
Band function
Time interval is from 12.892 sec. to 13.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.819505 ( 0.956785 0.956785 )
beta : -1.76995 ( 1.76607 0.191811 )
Epeak [keV] : 50.3045 ( -50.4098 -50.4098 )
Norm@50keV : 9.56770E-02 ( -0.0958777 4.51471e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.60 using 59 PHA bins.
# Reduced chi-squared = 0.7200 for 55 degrees of freedom
# Null hypothesis probability = 9.415626e-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] : 12.6191 (-0.981854 1.09199)
R^2/D10^2 : 0.772149 (-0.200273 0.264188)
(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 2.608e-08 2.850e-09
25- 50 8.692e-08 6.300e-09
50-150 8.596e-08 1.267e-08
15-150 1.990e-07 1.495e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.960 (-44.7924 -156.984)
Norm : 15.6801 (-1.0573 1.3079)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.009e-08 3.660e-09
25- 50 7.485e-08 1.020e-08
50-150 1.509e-07 6.141e-08
15-150 2.658e-07 7.140e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.55872 (-1.29893 1.33518)
R1^2/D10^2 : 3.51166 (-1.42167 3.0241)
kT2 [keV] : 29.5669 (-6.88583 13.5086)
R2^2/D10^2 : 2.72434E-02 (-0.0189923 0.0437701)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.843e-08 7.945e-09
25- 50 7.790e-08 1.402e-08
50-150 1.550e-07 6.561e-08
15-150 2.714e-07 7.970e-08
Plot creation:
Fri Jul 15 21:20:12 EDT 2022