batgrbproduct analysis for trigger=1093611
batgrbproduct Analysis for Trigger=1093611
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 Jan 18 19:48:51 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1093611/GCN5_download_cron
======================================================================
Trigger: 01093611 Segment: 000
BAT Trigger Time: 664142756.608 [s; MET]
Trigger Stop: 664142760.704 [s; MET]
UTC: 2022-01-17T20:05:28.153160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 191.946882570062 Dec: -28.7443931056232 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.14
Image Trigger?: NO
Rate S/N Ratio: 11.0453610171873 [ if not an image trigger ]
Image S/N Ratio: 7.14
Flight Position: [ source = BAT ]
RA: 191.946882570062 Dec: -28.7443931056232 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 191.989106678574 Dec: -28.7621193985616 [deg; J2000]
{ 12h 47m 57.4s , -28d 45' 43.6" }
+/- 2.65518189915903 [arcmin] (estimated 90% radius based on SNR)
+/- 1.63614430415517 [arcmin] (formal 1-sigma fit error)
SNR: 7.53823045492591
Angular difference between Flight and Ground position is 2.462591 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 24.3680000305176 +/- 4.59031330479473
Measured from: -1.89599990844727
to: 22.4720001220703 [s; relative to TRIGTIME]
T50: 12.8480000495911 +/- 7.19041585034808
Measured from: 0.936000108718872
to: 13.7840001583099 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.132000088691711
to: 0.867999911308289 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.72800004482269
to: 23.2879999876022 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.170295 0.267674 0.104389 0.005256
0.035604 0.035777 0.030854 0.026617 [error]
Peak 0.016945 0.029231 0.015479 0.002046
0.007351 0.007116 0.006420 0.005141 [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 6.10e-08 8.57e-08 8.92e-08 1.70e-07 2.90e-07 4.06e-07 erg/cm2
Error 1.42e-08 1.53e-08 2.76e-08 1.03e-07 6.44e-08 1.35e-07 erg/cm2
Peak flux Power-law 1.61e-01 1.71e-01 1.28e-01 1.56e-01 5.20e-01 6.17e-01 ph/cm2/s
Error 8.81e-02 5.69e-02 5.08e-02 1.39e-01 1.60e-01 1.96e-01 ph/cm2/s
Fluence Cutoff-PL 5.82e-08 1.00e-07 7.18e-08 1.70e-08 2.44e-07 2.47e-07 erg/cm2
Error 1.54e-08 2.40e-08 5.56e-08 1.39e-07 7.50e-08 1.54e-07 erg/cm2
Peak flux Cutoff-PL 1.65e-01 1.72e-01 1.27e-01 1.50e-01 5.21e-01 6.15e-01 ph/cm2/s
Error 8.87e-02 5.92e-02 5.11e-02 1.67e-01 1.60e-01 2.05e-01 ph/cm2/s
Fluence Band 5.72e-08 1.02e-07 7.15e-08 7.65e-08 2.62e-07 3.09e-07 erg/cm2
Error 1.26e-08 2.27e-08 -------- -------- 6.64e-08 1.25e-07 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 1.943 0.323 - - 1.21e-03 2.76e-04 80.660 57
CPL 0.583 2.278 38.1 0.0 8.65e-03 0.00e+00 78.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.412 0.593 - - 4.26e-03 1.33e-03 69.680 57
CPL 1.422 0.596 9999.4 0.0 4.24e-03 2.46e-02 69.690 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 26.016 -2.728 23.288
T90 24.368 -1.896 22.472
T50 12.848 0.936 13.784
Peak 1.000 -0.132 0.868
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
191.9891 -28.7621 0.0254 12.5 30.9 0.5311 7.5 TRIG_01093611
------------------------------------------
Foreground time interval of the image:
-2.728 23.288 (delta_t = 26.016 [sec])
Background time interval of the image:
-239.608 -2.728 (delta_t = 236.880 [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 -2.728 sec. to 23.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94296 ( -0.309172 0.33649 )
Norm@50keV : 1.21040E-03 ( -0.00028029 0.000272428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.66 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 57 degrees of freedom
# Null hypothesis probability = 2.130784e-02
Photon flux (15-150 keV) in 26.02 sec: 0.176960 ( -0.0309743 0.030978 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.89782e-07 ( -6.28222e-08 6.59495e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.728 sec. to 23.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.582706 ( -2.94313 1.6126 )
Epeak [keV] : 38.0901 ( )
Norm@50keV : 8.64671E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.83 using 59 PHA bins.
# Reduced chi-squared = 1.408 for 56 degrees of freedom
# Null hypothesis probability = 2.385944e-02
Photon flux (15-150 keV) in 26.02 sec: 0.169600 ( -0.031572 0.032169 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44049e-07 ( -6.43423e-08 8.57471e-08 ) ergs/cm2
Band function
Time interval is from -2.728 sec. to 23.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.97182 ( -2.99595 -1.45725 )
beta : -2.59488 ( 2.53408 0.632543 )
Epeak [keV] : 29.3749 ( -9.87507 24.7612 )
Norm@50keV : 3.20510 ( -3.20302 39.1097 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.62 using 59 PHA bins.
# Reduced chi-squared = 1.393 for 55 degrees of freedom
# Null hypothesis probability = 2.859172e-02
Photon flux (15-150 keV) in 26.02 sec: 0.174480 ( 6.82552 -0.03213 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62193e-07 ( -2.62011e-07 -6.55509e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.85360 (-1.51866 1.91185)
R^2/D10^2 : 0.136238 (-0.0724621 0.145696)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.71 using 59 PHA bins.
# Reduced chi-squared = 1.416 for 57 degrees of freedom
# Null hypothesis probability = 2.110956e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.363e-08 1.690e-08
25- 50 1.111e-07 3.271e-08
50-150 4.029e-08 2.021e-08
15-150 2.050e-07 5.845e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.1316 (-25.7705 63.8129)
Norm : 0.915869 (-0.228549 0.315073)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.036e-08 1.445e-08
25- 50 9.328e-08 2.584e-08
50-150 1.106e-07 6.534e-08
15-150 2.643e-07 9.281e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.20352 (-3.07649 2.22795)
R1^2/D10^2 : 0.252993 (-0.139695 0.674793)
kT2 [keV] : 27.4150 (-30.4932 -34.9516)
R2^2/D10^2 : 8.79131E-04 (-0.000430132 0.0588866)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.932e-08 3.556e-08
25- 50 9.855e-08 5.796e-08
50-150 1.071e-07 7.245e-08
15-150 2.649e-07 1.362e-07
Peak spectrum fit
Power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41243 ( -0.601249 0.584 )
Norm@50keV : 4.25597E-03 ( -0.00135156 0.00131646 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.68 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 57 degrees of freedom
# Null hypothesis probability = 1.208087e-01
Photon flux (15-150 keV) in 1 sec: 0.519779 ( -0.159727 0.160219 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10209e-08 ( -1.41877e-08 1.4797e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42195 ( -0.616123 0.575902 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.24314E-03 ( -0.00135549 0.0477846 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.69 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 56 degrees of freedom
# Null hypothesis probability = 1.033727e-01
Photon flux (15-150 keV) in 1 sec: 0.520894 ( -0.160787 0.158985 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.09898e-08 ( -1.52211e-08 1.45476e-08 ) ergs/cm2
Band function
Time interval is from -0.132 sec. to 0.868 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.84912 ( -4.84912 -4.84912 )
beta : -1.65939 ( -1.40385 0.766595 )
Epeak [keV] : 29.5496 ( -29.5496 45.8689 )
Norm@50keV : 127.136 ( -38.3094 3.54037e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.47 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.069065e-02
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] : 11.4683 (-3.71939 10.8435)
R^2/D10^2 : 0.146381 (-0.145525 0.475318)
(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 4.051e-09 2.554e-09
25- 50 1.207e-08 7.330e-09
50-150 9.252e-09 6.400e-09
15-150 2.538e-08 1.583e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 2.12518 (-0.646826 0.647555)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.292e-09 3.304e-09
25- 50 1.018e-08 6.380e-09
50-150 2.233e-08 1.355e-08
15-150 3.780e-08 2.288e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.35938 (-3.00984 4.53977)
R1^2/D10^2 : 0.388467 (-0.307418 0.564733)
kT2 [keV] : 97.1302 (-99.2297 -99.2298)
R2^2/D10^2 : 2.81628E-04 (-0.000233499 0.0106643)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.280e-09 3.358e-09
25- 50 1.078e-08 6.930e-09
50-150 2.882e-08 1.606e-08
15-150 4.487e-08 2.513e-08
Plot creation:
Tue Jan 18 19:56:36 EST 2022