batgrbproduct analysis for trigger=1093693
batgrbproduct Analysis for Trigger=1093693
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): Wed Jan 19 20:13:08 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1093693/GCN5_download_cron
======================================================================
Trigger: 01093693 Segment: 000
BAT Trigger Time: 664200232 [s; MET]
Trigger Stop: 664200296 [s; MET]
UTC: 2022-01-18T12:03:23.541280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.136249788404 Dec: -15.845955172471 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.23
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.23
Flight Position: [ source = BAT ]
RA: 245.136249788404 Dec: -15.845955172471 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.107120405774 Dec: -15.8200930522447 [deg; J2000]
{ 16h 20m 25.7s , -15d 49' 12.3" }
+/- 1.85405983411051 [arcmin] (estimated 90% radius based on SNR)
+/- 0.756516869804013 [arcmin] (formal 1-sigma fit error)
SNR: 12.5917026030203
Angular difference between Flight and Ground position is 2.288044 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 112 +/- 16
Measured from: 4.00000011920929
to: 116.000000119209 [s; relative to TRIGTIME]
T50: 64 +/- 16
Measured from: 36.0000001192093
to: 100.000000119209 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 123.5
to: 124.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 4
to: 116 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.631726 0.583138 0.044445 -0.226906
0.087571 0.084396 0.076363 0.085181 [error]
Peak 0.052338 0.001984 -0.001195 0.006130
0.008866 0.008132 0.007234 0.007885 [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 1.40e-06 2.56e-07 2.27e-08 2.18e-09 1.68e-06 1.68e-06 erg/cm2
Error 1.35e-07 4.23e-08 9.53e-09 1.60e-09 1.34e-07 1.34e-07 erg/cm2
Peak flux Power-law 4.62e-01 4.70e-02 1.95e-03 8.44e-05 5.11e-01 5.11e-01 ph/cm2/s
Error 1.45e-01 5.54e-02 6.28e-03 8.10e-04 1.82e-01 1.82e-01 ph/cm2/s
Fluence Cutoff-PL 1.38e-06 2.28e-07 5.45e-09 1.19e-11 1.62e-06 1.62e-06 erg/cm2
Error 1.41e-07 5.59e-08 -------- 1.68e-09 1.52e-07 1.52e-07 erg/cm2
Peak flux Cutoff-PL 4.93e-01 3.03e-02 3.26e-05 1.21e-10 5.22e-01 5.21e-01 ph/cm2/s
Error 2.10e-01 3.15e-02 5.35e-03 0.00e+00 1.77e-01 1.78e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.46e-01 6.42e-03 2.00e-05 6.23e-08 4.52e-01 4.52e-01 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 5.495 0.374 - - 2.46e-04 8.23e-05 49.410 57
CPL 1.000 0.000 50.0 0.0 3.99e-03 0.00e+00 353.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.589 1.875 - - 1.87e-04 4.43e-04 42.690 57
CPL 1.000 0.000 50.0 0.0 7.25e-03 0.00e+00 65.520 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 112.000 4.000 116.000
T90 112.000 4.000 116.000
T50 64.000 36.000 100.000
Peak 1.000 123.500 124.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1071 -15.8201 0.0152 14.5 166.5 2.5125 12.6 TRIG_01093693
------------------------------------------
Foreground time interval of the image:
4.000 15.620 (delta_t = 11.620 [sec])
31.000 39.290 (delta_t = 8.290 [sec])
40.000 66.770 (delta_t = 26.770 [sec])
69.000 72.201 (delta_t = 3.201 [sec])
Background time interval of the image:
-60.000 -31.250 (delta_t = 28.750 [sec])
-10.000 4.000 (delta_t = 14.000 [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
4.000000 15.620000
31.000000 39.290000
40.000000 66.770000
69.000000 79.800000
85.000000 116.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.49548 ( -0.368788 0.378266 )
Norm@50keV : 2.45841E-04 ( -7.16949e-05 9.28768e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.41 using 59 PHA bins.
# Reduced chi-squared = 0.8669 for 57 degrees of freedom
# Null hypothesis probability = 7.522188e-01
Photon flux (15-150 keV) in 88.48 sec: 0.612960 ( -0.0541688 0.0547047 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6756e-06 ( -1.33865e-07 1.34473e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
4.000000 15.620000
31.000000 39.290000
40.000000 66.770000
69.000000 79.800000
85.000000 116.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.98709E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 353.99 using 59 PHA bins.
# Reduced chi-squared = 6.3213 for 56 degrees of freedom
# Null hypothesis probability = 7.263642e-45
Photon flux (15-150 keV) in 88.48 sec: 0.597876 ( -0.059943 0.058772 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61664e-06 ( -1.5215e-07 1.5261e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
4.000000 15.620000
31.000000 39.290000
40.000000 66.770000
69.000000 79.800000
85.000000 116.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.73969 ( 3.67862 5.73969 )
beta : -5.53425 ( -0.349765 0.400234 )
Epeak [keV] : 317.529 ( -317.529 -317.529 )
Norm@50keV : 3.22408E-02 ( -0.00905616 0.0133603 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.44 using 59 PHA bins.
# Reduced chi-squared = 0.8990 for 55 degrees of freedom
# Null hypothesis probability = 6.859639e-01
Photon flux (15-150 keV) in 88.48 sec: 0.452481 ( ) 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] : 2.91281 (-0.224108 0.252564)
R^2/D10^2 : 96.5676 (-43.8162 80.6729)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9427 for 57 degrees of freedom
# Null hypothesis probability = 5.984627e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-06 2.154e-07
25- 50 1.743e-07 3.460e-08
50-150 2.201e-10 1.385e-10
15-150 1.501e-06 2.495e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.41093 (-0.607197 0.732834)
Norm : 102.197 (-38.423 63.094)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.363e-06 2.000e-07
25- 50 2.050e-07 4.203e-08
50-150 1.560e-09 8.990e-10
15-150 1.570e-06 2.199e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.78883 (-1.03846 0.758209)
R1^2/D10^2 : 2191.60 (-2114.06 4.65336e+06)
kT2 [keV] : 3.70656 (-0.695765 2.61161)
R2^2/D10^2 : 13.6398 (-12.9145 6.5128)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.337e-06 7.072e-07
25- 50 2.075e-07 1.011e-07
50-150 8.993e-09 1.139e-08
15-150 1.554e-06 8.047e-07
Peak spectrum fit
Power-law model
Time interval is from 123.500 sec. to 124.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.58875 ( -1.49857 2.25109 )
Norm@50keV : 1.87015E-04 ( -0.000187017 0.000698146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.69 using 59 PHA bins.
# Reduced chi-squared = 0.7489 for 57 degrees of freedom
# Null hypothesis probability = 9.205732e-01
Photon flux (15-150 keV) in 1 sec: 0.511082 ( -0.180608 0.1825 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56997e-08 ( -6.22768e-09 7.1807e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 123.500 sec. to 124.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.24897E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.52 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 56 degrees of freedom
# Null hypothesis probability = 1.800110e-01
Photon flux (15-150 keV) in 1 sec: 0.522293 ( -0.174737 0.178357 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54623e-08 ( -5.57481e-09 3.5923e-09 ) ergs/cm2
Band function
Time interval is from 123.500 sec. to 124.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.66643 ( 1.33859 3.66676 )
beta : -5.58681 ( -2.24804 1.50083 )
Epeak [keV] : 693.330 ( -693.33 -693.33 )
Norm@50keV : 0.669767 ( 842.236 -0.669073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.69 using 59 PHA bins.
# Reduced chi-squared = 0.7761 for 55 degrees of freedom
# Null hypothesis probability = 8.869393e-01
Photon flux (15-150 keV) in 1 sec: 0.452481 ( ) 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] : 2.52186 (-0.724495 0.890022)
R^2/D10^2 : 246.583 (-246.581 3023.52)
(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 1.441e-08 8.385e-09
25- 50 1.097e-09 7.295e-10
50-150 3.773e-13 4.946e-13
15-150 1.550e-08 8.675e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.62792 (-1.86301 3.1723)
Norm : 160.648 (-160.648 1371.23)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.399e-08 8.265e-09
25- 50 1.477e-09 1.004e-09
50-150 5.106e-12 6.090e-12
15-150 1.548e-08 9.090e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.49771 (-0.399528 0.872782)
R1^2/D10^2 : 261.819 (-169.974 3320.16)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 4.40808E-05 (-4.51283e-05 -4.51283e-05)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.432e-08 8.060e-09
25- 50 1.524e-09 6.740e-10
50-150 1.167e-08 1.245e-09
15-150 2.752e-08 9.730e-09
Plot creation:
Wed Jan 19 20:20:08 EST 2022