batgrbproduct analysis for trigger=1200560
batgrbproduct Analysis for Trigger=1200560
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 Dec 5 11:12:50 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1200560/GCN5_download_cron
======================================================================
Trigger: 01200560 Segment: 000
BAT Trigger Time: 723351552 [s; MET]
Trigger Stop: 723351616 [s; MET]
UTC: 2023-12-04T02:58:39.515740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.652851131926 Dec: -40.210010845388 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 13.83
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.83
Flight Position: [ source = BAT ]
RA: 135.652851131926 Dec: -40.210010845388 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.78693373194 Dec: -40.3634520756269 [deg; J2000]
{ 09h 03m 08.9s , -40d 21' 48.4" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.73957667568383 [arcmin] (formal 1-sigma fit error)
SNR: -5.82326449665113
Angular difference between Flight and Ground position is 11.064351 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 190.036000013351 +/- 28.591373403095
Measured from: -61.3680000305176
to: 128.667999982834 [s; relative to TRIGTIME]
T50: 146.547999978065 +/- 106.139729595462
Measured from: -37.9559999704361
to: 108.592000007629 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 28.9160000085831
to: 29.9160000085831 [s; relative to TRIGTIME]
Total Fluence
Measured from: -66.6840000152588
to: 135.516000032425 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.951815 1.325543 -0.016078 -0.026900
0.091464 0.093401 0.081755 0.080083 [error]
Peak 0.027554 0.024210 0.010154 0.006174
0.006617 0.006506 0.005845 0.005786 [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 5.91e-07 4.51e-07 2.30e-07 1.69e-07 1.35e-06 1.44e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 2.54e-01 1.73e-01 7.76e-02 4.82e-02 5.28e-01 5.53e-01 ph/cm2/s
Error 9.66e-02 5.34e-02 6.40e-02 6.50e-02 1.48e-01 1.62e-01 ph/cm2/s
Fluence Cutoff-PL 5.69e-07 5.30e-07 2.66e-08 6.97e-12 1.13e-06 1.13e-06 erg/cm2
Error 6.16e-08 6.36e-08 2.12e-08 6.19e-11 9.72e-08 9.72e-08 erg/cm2
Peak flux Cutoff-PL 2.53e-01 1.74e-01 7.82e-02 4.87e-02 5.28e-01 5.53e-01 ph/cm2/s
Error 9.66e-02 5.37e-02 3.66e-02 6.45e-02 1.47e-01 1.60e-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 2.971 0.000 - - 5.63e-04 0.00e+00 117.740 57
CPL -3.159 2.042 23.6 1.9 1.31e+01 2.29e+02 64.830 56
The chi2 of BB fit is 66.26 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.158 0.699 - - 3.26e-03 1.50e-03 46.710 57
CPL 1.991 0.000 11.7 0.0 3.65e-03 0.00e+00 46.900 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 202.200 -66.684 135.516
T90 190.036 -61.368 128.668
T50 146.548 -37.956 108.592
Peak 1.000 28.916 29.916
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.7869 -40.3635 0.0329 0.1 -49.0 -2.0313 -5.8 TRIG_01200560
------------------------------------------
Foreground time interval of the image:
-66.684 135.516 (delta_t = 202.200 [sec])
Background time interval of the image:
-120.000 -66.684 (delta_t = 53.316 [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 -66.684 sec. to 135.516 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.97124 ( )
Norm@50keV : 5.62525E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 117.74 using 59 PHA bins.
# Reduced chi-squared = 2.0657 for 57 degrees of freedom
# Null hypothesis probability = 4.061892e-06
Photon flux (15-150 keV) in 202.2 sec: 0.151505 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34902e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -66.684 sec. to 135.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.15946 ( -2.7104 1.37264 )
Epeak [keV] : 23.6239 ( -1.81655 1.89271 )
Norm@50keV : 13.0631 ( -13.0156 445.473 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.83 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 56 degrees of freedom
# Null hypothesis probability = 1.958220e-01
Photon flux (15-150 keV) in 202.2 sec: 0.142709 ( -0.011958 0.011947 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1256e-06 ( -9.59176e-08 9.84289e-08 ) ergs/cm2
Band function
Time interval is from -66.684 sec. to 135.516 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29015 ( )
beta : -8.94785 ( )
Epeak [keV] : 46.7506 ( )
Norm@50keV : 2.00188E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 222.68 using 59 PHA bins.
# Reduced chi-squared = 4.0488 for 55 degrees of freedom
# Null hypothesis probability = 4.771792e-22
Photon flux (15-150 keV) in 202.2 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] : 5.76245 (-0.371532 0.395604)
R^2/D10^2 : 0.693248 (-0.182905 0.25063)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.26 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 57 degrees of freedom
# Null hypothesis probability = 1.878560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.822e-07 6.299e-08
25- 50 5.311e-07 7.016e-08
50-150 4.109e-08 1.492e-08
15-150 1.154e-06 1.131e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.2194 (-2.35842 2.83556)
Norm : 2.10213 (-0.36953 0.459051)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.065e-07 5.682e-08
25- 50 4.928e-07 6.106e-08
50-150 1.256e-07 4.346e-08
15-150 1.225e-06 1.246e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.79964 (-5.79212 -5.79212)
R1^2/D10^2 : 0.567781 (-0.56851 -0.56851)
kT2 [keV] : 5.63530 (-5.70002 -5.70002)
R2^2/D10^2 : 0.120429 (-0.122069 -0.122069)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.812e-07 3.747e-01
25- 50 5.324e-07 3.322e+00
50-150 4.158e-08 7.378e+01
15-150 1.155e-06 6.720e+01
Peak spectrum fit
Power-law model
Time interval is from 28.916 sec. to 29.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15843 ( -0.610794 0.786776 )
Norm@50keV : 3.25983E-03 ( -0.00157372 0.00143532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.71 using 59 PHA bins.
# Reduced chi-squared = 0.8195 for 57 degrees of freedom
# Null hypothesis probability = 8.327166e-01
Photon flux (15-150 keV) in 1 sec: 0.528146 ( -0.147998 0.148023 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04774e-08 ( -1.1588e-08 1.28147e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.916 sec. to 29.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99112 ( )
Epeak [keV] : 11.6626 ( )
Norm@50keV : 3.64927E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.90 using 59 PHA bins.
# Reduced chi-squared = 0.8375 for 56 degrees of freedom
# Null hypothesis probability = 8.016911e-01
Photon flux (15-150 keV) in 1 sec: 0.528160 ( -0.148188 0.146721 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01131e-08 ( -1.12697e-08 1.26632e-08 ) ergs/cm2
Band function
Time interval is from 28.916 sec. to 29.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.56319 ( 1.56567 1.56567 )
beta : -2.13938 ( 2.14403 0.596859 )
Epeak [keV] : 12.5744 ( -9.0939 -9.0939 )
Norm@50keV : 1.10616E-02 ( -0.0125465 0.625988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.72 using 59 PHA bins.
# Reduced chi-squared = 0.8495 for 55 degrees of freedom
# Null hypothesis probability = 7.788592e-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] : 7.18560 (-2.52199 3.62753)
R^2/D10^2 : 0.836257 (-0.831153 4.16155)
(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 7.122e-09 4.183e-09
25- 50 1.025e-08 6.430e-09
50-150 1.866e-09 1.582e-09
15-150 1.924e-08 1.190e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.6199 (-32.4974 -50.8534)
Norm : 2.91996 (-1.23821 3.52593)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.160e-09 3.818e-09
25- 50 1.033e-08 5.842e-09
50-150 1.014e-08 7.475e-09
15-150 2.763e-08 1.630e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98785 (-3.37822 3.29443)
R1^2/D10^2 : 3.28030 (-2.69757 1728.72)
kT2 [keV] : 36.6983 (-29.201 -37.7584)
R2^2/D10^2 : 1.99036E-03 (-0.00179229 0.027728)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.268e-09 4.784e-09
25- 50 7.570e-09 4.207e-09
50-150 2.109e-08 1.240e-08
15-150 3.693e-08 1.948e-08
Plot creation:
Tue Dec 5 11:14:33 EST 2023