batgrbproduct analysis for trigger=1195887
batgrbproduct Analysis for Trigger=1195887
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 Nov 14 15:19:02 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1195887/GCN5_download_cron
======================================================================
Trigger: 01195887 Segment: 000
BAT Trigger Time: 721405072.064 [s; MET]
Trigger Stop: 721405073.088 [s; MET]
UTC: 2023-11-11T14:17:19.712840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.233898035718 Dec: 52.4469715812306 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.51
Image Trigger?: NO
Rate S/N Ratio: 23.6643191323985 [ if not an image trigger ]
Image S/N Ratio: 12.51
Flight Position: [ source = BAT ]
RA: 290.233898035718 Dec: 52.4469715812306 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.197042286114 Dec: 52.4397041414912 [deg; J2000]
{ 19h 20m 47.3s , +52d 26' 22.9" }
+/- 0.783777264535342 [arcmin] (estimated 90% radius based on SNR)
+/- 0.234302748192311 [arcmin] (formal 1-sigma fit error)
SNR: 43.0796058065315
Angular difference between Flight and Ground position is 1.416691 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 34.0759998559952 +/- 4.88498921461291
Measured from: -3.7519998550415
to: 30.3240000009537 [s; relative to TRIGTIME]
T50: 11.5920000076294 +/- 0.856560580933185
Measured from: 0.00400006771087646
to: 11.5960000753403 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0679999589920044
to: 1.067999958992 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.32000005245209
to: 40.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.424566 1.955145 1.462043 0.372117
0.061777 0.065632 0.057280 0.048641 [error]
Peak 0.079237 0.124545 0.089829 0.028908
0.010133 0.011650 0.010184 0.007742 [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 4.92e-07 8.61e-07 1.15e-06 3.17e-06 3.36e-06 5.67e-06 erg/cm2
Error 3.50e-08 3.65e-08 5.82e-08 3.50e-07 1.41e-07 3.89e-07 erg/cm2
Peak flux Power-law 9.26e-01 9.02e-01 6.14e-01 6.55e-01 2.71e+00 3.10e+00 ph/cm2/s
Error 1.55e-01 9.74e-02 8.30e-02 1.75e-01 2.84e-01 3.26e-01 ph/cm2/s
Fluence Cutoff-PL 4.55e-07 8.91e-07 1.19e-06 1.83e-06 3.26e-06 4.36e-06 erg/cm2
Error 4.29e-08 4.25e-08 6.41e-08 6.97e-07 1.56e-07 7.04e-07 erg/cm2
Peak flux Cutoff-PL 8.52e-01 9.59e-01 6.42e-01 3.57e-01 2.66e+00 2.81e+00 ph/cm2/s
Error 1.80e-01 1.22e-01 9.38e-02 2.84e-01 2.89e-01 4.09e-01 ph/cm2/s
Fluence Band 4.37e-07 9.07e-07 1.15e-06 2.65e-06 3.27e-06 5.15e-06 erg/cm2
Error -------- -------- 7.74e-08 -------- 1.52e-07 -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- 2.81e+00 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 1.579 0.070 - - 7.88e-03 3.11e-04 54.660 57
CPL 1.179 0.292 106.2 73.5 1.23e-02 4.06e-03 48.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.555 0.172 - - 2.13e-02 2.31e-03 66.760 57
CPL 1.008 0.707 88.2 -30.1 4.13e-02 4.26e-02 64.840 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: 34.880000 sec.
T50 in the 50-300 keV band: 11.712000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 45.384 -5.320 40.064
T90 34.076 -3.752 30.324
T50 11.592 0.004 11.596
Peak 1.000 0.068 1.068
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.1970 +52.4397 0.0045 35.1 -144.9 4.3308 43.1 TRIG_01195887
------------------------------------------
Foreground time interval of the image:
-5.320 12.637 (delta_t = 17.957 [sec])
Background time interval of the image:
-239.064 -218.072 (delta_t = 20.992 [sec])
-214.064 -213.324 (delta_t = 0.740 [sec])
-211.064 -162.594 (delta_t = 48.470 [sec])
-161.064 -116.994 (delta_t = 44.070 [sec])
-62.064 -50.524 (delta_t = 11.540 [sec])
-49.064 -47.084 (delta_t = 1.980 [sec])
-46.064 -5.320 (delta_t = 40.744 [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 -5.320 sec. to 40.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57855 ( -0.0703493 0.0705614 )
Norm@50keV : 7.88464E-03 ( -0.000311306 0.000310989 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9590 for 57 degrees of freedom
# Null hypothesis probability = 5.632027e-01
Photon flux (15-150 keV) in 45.38 sec: 1.00660 ( -0.0418444 0.0419403 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3553e-06 ( -1.40605e-07 1.40973e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.320 sec. to 40.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17919 ( -0.302385 0.282509 )
Epeak [keV] : 106.177 ( -25.3085 121.781 )
Norm@50keV : 1.23440E-02 ( -0.00328047 0.0048495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.69 using 59 PHA bins.
# Reduced chi-squared = 0.8694 for 56 degrees of freedom
# Null hypothesis probability = 7.453263e-01
Photon flux (15-150 keV) in 45.38 sec: 0.982848 ( -0.044793 0.044872 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26306e-06 ( -1.56497e-07 1.55849e-07 ) ergs/cm2
Band function
Time interval is from -5.320 sec. to 40.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.674671 ( -0.733016 1.39173 )
beta : -1.74925 ( 1.75113 0.145875 )
Epeak [keV] : 59.1542 ( -26.732 132.356 )
Norm@50keV : 2.55150E-02 ( -0.0141864 0.232247 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.18 using 59 PHA bins.
# Reduced chi-squared = 0.8759 for 55 degrees of freedom
# Null hypothesis probability = 7.308098e-01
Photon flux (15-150 keV) in 45.38 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.271e-06 ( -3.27068e-06 -1.52672e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.0427 ( )
R^2/D10^2 : 0.109161 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 173.53 using 59 PHA bins.
# Reduced chi-squared = 3.0443 for 57 degrees of freedom
# Null hypothesis probability = 1.064384e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.346e-07 1.824e-08
25- 50 9.345e-07 4.992e-08
50-150 1.441e-06 1.105e-07
15-150 2.610e-06 1.182e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 195.355 (-38.6439 -194.855)
Norm : 4.08093 (-0.166217 0.185019)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.610e-07 2.546e-08
25- 50 8.860e-07 4.901e-08
50-150 1.938e-06 4.254e-07
15-150 3.285e-06 4.391e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62704 (-1.10722 1.16582)
R1^2/D10^2 : 0.772498 (-0.278393 0.526311)
kT2 [keV] : 26.5174 (-3.71487 5.63558)
R2^2/D10^2 : 1.10571E-02 (-0.00559369 0.00871779)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.144e-07 5.584e-08
25- 50 9.177e-07 9.802e-08
50-150 1.916e-06 3.320e-07
15-150 3.248e-06 4.497e-07
Peak spectrum fit
Power-law model
Time interval is from 0.068 sec. to 1.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55546 ( -0.170402 0.173291 )
Norm@50keV : 2.13391E-02 ( -0.0023165 0.00229838 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.76 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.765395e-01
Photon flux (15-150 keV) in 1 sec: 2.70568 ( -0.283532 0.283732 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00733e-07 ( -2.34531e-08 2.3656e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.068 sec. to 1.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00774 ( -0.79364 0.62043 )
Epeak [keV] : 88.1525 ( -27.9532 -88.1525 )
Norm@50keV : 4.12751E-02 ( -0.0211346 0.0641332 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.84 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 56 degrees of freedom
# Null hypothesis probability = 1.956437e-01
Photon flux (15-150 keV) in 1 sec: 2.66289 ( -0.28978 0.28902 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93733e-07 ( -2.5281e-08 2.534e-08 ) ergs/cm2
Band function
Time interval is from 0.068 sec. to 1.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00624 ( -0.413524 0.454298 )
beta : -7.61157 ( 6.70919 16.7092 )
Epeak [keV] : 89.2566 ( -89.2566 -89.2566 )
Norm@50keV : 4.10350E-02 ( -0.0159153 0.0103439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.84 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 55 degrees of freedom
# Null hypothesis probability = 1.709180e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94106e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9843 (-1.66407 1.94536)
R^2/D10^2 : 0.399454 (-0.149497 0.229226)
(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 1.650e-08 3.090e-09
25- 50 6.131e-08 8.245e-09
50-150 7.890e-08 1.678e-08
15-150 1.567e-07 2.120e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.641 (-82.392 -198.365)
Norm : 11.0935 (-1.16548 1.30694)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.764e-08 1.544e-08
25- 50 5.314e-08 2.906e-08
50-150 1.164e-07 6.305e-08
15-150 1.972e-07 1.072e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.19239 (-2.95789 3.30873)
R1^2/D10^2 : 2.50994 (-1.67256 13.2939)
kT2 [keV] : 24.1578 (-7.07595 24.4155)
R2^2/D10^2 : 4.26299E-02 (-0.0387881 0.127575)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.583e-08 1.331e-08
25- 50 5.544e-08 2.586e-08
50-150 1.122e-07 5.793e-08
15-150 1.935e-07 9.338e-08
Plot creation:
Tue Nov 14 15:28:18 EST 2023