batgrbproduct analysis for trigger=1195733
batgrbproduct Analysis for Trigger=1195733
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): Sat Nov 11 19:37:17 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1195733/GCN5_download_cron
======================================================================
Trigger: 01195733 Segment: 000
BAT Trigger Time: 721344007.168 [s; MET]
Trigger Stop: 721344009.216 [s; MET]
UTC: 2023-11-10T21:19:34.821020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 356.296023258114 Dec: 82.6211432242904 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.31
Image Trigger?: NO
Rate S/N Ratio: 38.0525951808809 [ if not an image trigger ]
Image S/N Ratio: 12.31
Flight Position: [ source = BAT ]
RA: 356.296023258114 Dec: 82.6211432242904 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 356.24438797842 Dec: 82.6301552017499 [deg; J2000]
{ 23h 44m 58.7s , +82d 37' 48.6" }
+/- 1.20775960689119 [arcmin] (estimated 90% radius based on SNR)
+/- 0.478147105465969 [arcmin] (formal 1-sigma fit error)
SNR: 23.2275486838017
Angular difference between Flight and Ground position is 0.671194 arcmin
Partial Coding Fraction: 0.34375 [ including projection effects ]
Duration
T90: 11.3439999818802 +/- 1.56450633526669
Measured from: -0.735999822616577
to: 10.6080001592636 [s; relative to TRIGTIME]
T50: 4.76800000667572 +/- 0.668562708376517
Measured from: 1.00800013542175
to: 5.77600014209747 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.628000020980835
to: 1.62800002098083 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.60000002384186
to: 12.3200000524521 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.558248 0.779556 0.675596 0.220327
0.045371 0.049162 0.043680 0.035731 [error]
Peak 0.077889 0.120974 0.162749 0.087514
0.012958 0.015682 0.016405 0.013172 [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 1.72e-07 3.47e-07 5.46e-07 1.90e-06 1.52e-06 2.97e-06 erg/cm2
Error 2.10e-08 2.55e-08 4.27e-08 3.28e-07 1.07e-07 3.55e-07 erg/cm2
Peak flux Power-law 6.99e-01 9.89e-01 1.04e+00 2.01e+00 3.36e+00 4.74e+00 ph/cm2/s
Error 1.68e-01 1.45e-01 1.26e-01 5.34e-01 3.91e-01 6.06e-01 ph/cm2/s
Fluence Cutoff-PL 1.69e-07 3.51e-07 5.52e-07 1.65e-06 1.51e-06 2.72e-06 erg/cm2
Error 2.31e-08 2.18e-08 3.63e-08 5.74e-07 1.11e-07 6.35e-07 erg/cm2
Peak flux Cutoff-PL 6.99e-01 9.90e-01 1.04e+00 2.00e+00 3.36e+00 4.72e+00 ph/cm2/s
Error 1.67e-01 1.50e-01 1.48e-01 7.01e-01 3.93e-01 8.73e-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 1.346 0.113 - - 1.12e-02 7.25e-04 55.380 57
CPL 1.250 0.285 416.8 0.0 1.24e-02 4.41e-03 55.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.929 0.200 - - 2.92e-02 3.38e-03 53.730 57
CPL 0.923 0.212 9999.1 0.0 2.94e-02 2.03e-02 53.730 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: 7.232000 sec.
T50 in the 50-300 keV band: 2.688000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.920 -1.600 12.320
T90 11.344 -0.736 10.608
T50 4.768 1.008 5.776
Peak 1.000 0.628 1.628
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
356.2444 +82.6302 0.0083 38.8 149.7 2.2909 23.2 TRIG_01195733
------------------------------------------
Foreground time interval of the image:
-1.600 12.320 (delta_t = 13.920 [sec])
Background time interval of the image:
-133.267 -100.498 (delta_t = 32.769 [sec])
-99.168 -97.746 (delta_t = 1.422 [sec])
-96.168 -1.600 (delta_t = 94.568 [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 -1.600 sec. to 12.320 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34638 ( -0.113069 0.112185 )
Norm@50keV : 1.11755E-02 ( -0.000724702 0.000724642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9716 for 57 degrees of freedom
# Null hypothesis probability = 5.359803e-01
Photon flux (15-150 keV) in 13.92 sec: 1.34532 ( -0.0916822 0.0918432 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52058e-06 ( -1.06641e-07 1.06974e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.600 sec. to 12.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24997 ( -0.415844 0.153866 )
Epeak [keV] : 416.767 ( -416.738 -416.738 )
Norm@50keV : 1.24373E-02 ( -0.00188098 0.00694177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9858 for 56 degrees of freedom
# Null hypothesis probability = 5.049798e-01
Photon flux (15-150 keV) in 13.92 sec: 1.34009 ( -0.09388 0.09388 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51349e-06 ( -1.11861e-07 1.10024e-07 ) ergs/cm2
Band function
Time interval is from -1.600 sec. to 12.320 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96977 ( -14.159 -4.96977 )
beta : -1.44515 ( -0.139355 0.129971 )
Epeak [keV] : 26.4973 ( -4.46075 3.50222 )
Norm@50keV : 702.849 ( -45.3481 1564.84 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.36 using 59 PHA bins.
# Reduced chi-squared = 0.8974 for 55 degrees of freedom
# Null hypothesis probability = 6.890633e-01
Photon flux (15-150 keV) in 13.92 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] : 18.1264 ( )
R^2/D10^2 : 8.12482E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.66 using 59 PHA bins.
# Reduced chi-squared = 2.1519 for 57 degrees of freedom
# Null hypothesis probability = 1.037649e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.423e-08 1.054e-08
25- 50 3.451e-07 3.403e-08
50-150 8.246e-07 8.895e-08
15-150 1.244e-06 1.081e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-18.0634 -200)
Norm : 5.62421 (-0.367609 0.367609)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.950e-07 1.420e-08
25- 50 3.751e-07 3.257e-08
50-150 8.227e-07 1.988e-07
15-150 1.393e-06 2.119e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.15628 (-1.0722 1.27247)
R1^2/D10^2 : 1.29289 (-0.558424 1.02326)
kT2 [keV] : 31.6678 (-5.10861 8.11875)
R2^2/D10^2 : 1.05406E-02 (-0.0053748 0.0084169)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.737e-07 5.123e-08
25- 50 3.566e-07 7.656e-08
50-150 1.010e-06 2.382e-07
15-150 1.540e-06 3.384e-07
Peak spectrum fit
Power-law model
Time interval is from 0.628 sec. to 1.628 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.929033 ( -0.203262 0.196823 )
Norm@50keV : 2.92486E-02 ( -0.00339042 0.00336901 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9427 for 57 degrees of freedom
# Null hypothesis probability = 5.984832e-01
Photon flux (15-150 keV) in 1 sec: 3.35857 ( -0.390842 0.391707 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24617e-07 ( -3.9903e-08 4.01255e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.628 sec. to 1.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.922783 ( -0.225037 0.198131 )
Epeak [keV] : 9999.11 ( -9999.06 -9999.06 )
Norm@50keV : 2.94397E-02 ( -0.00335696 0.0372868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9594 for 56 degrees of freedom
# Null hypothesis probability = 5.613380e-01
Photon flux (15-150 keV) in 1 sec: 3.35768 ( -0.3944 0.39114 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24274e-07 ( -4.0675e-08 4.043e-08 ) ergs/cm2
Band function
Time interval is from 0.628 sec. to 1.628 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.99999 -4.99999 )
beta : -0.973173 ( -0.221057 0.217786 )
Epeak [keV] : 27.1353 ( -27.1353 7.68177 )
Norm@50keV : 1162.12 ( -130.788 5.08333e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.31 using 59 PHA bins.
# Reduced chi-squared = 0.9692 for 55 degrees of freedom
# Null hypothesis probability = 5.396178e-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] : 24.1827 (-3.62456 4.6418)
R^2/D10^2 : 9.18437E-02 (-0.0379392 0.0599266)
(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 9.493e-09 2.151e-09
25- 50 5.294e-08 9.605e-09
50-150 2.305e-07 4.605e-08
15-150 2.929e-07 4.940e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-23.0012 -200)
Norm : 13.3776 (-1.61064 1.61064)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.331e-08 1.857e-08
25- 50 6.409e-08 3.522e-08
50-150 1.405e-07 7.750e-08
15-150 2.380e-07 1.302e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.96595 (-2.77472 6.02598)
R1^2/D10^2 : 2.30525 (-1.94334 7.90696)
kT2 [keV] : 34.6483 (-8.54404 40.71)
R2^2/D10^2 : 2.78816E-02 (-0.0244451 0.0394434)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.265e-08 1.238e-08
25- 50 5.534e-08 2.213e-08
50-150 2.497e-07 1.311e-07
15-150 3.277e-07 1.423e-07
Plot creation:
Sat Nov 11 19:39:57 EST 2023