batgrbproduct analysis for trigger=1180060
batgrbproduct Analysis for Trigger=1180060
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): Fri Jul 21 11:56:14 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1180060/GCN5_download_cron
======================================================================
Trigger: 01180060 Segment: 000
BAT Trigger Time: 711531992 [s; MET]
Trigger Stop: 711532104 [s; MET]
UTC: 2023-07-20T07:46:00.324520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 47.6704340786371 Dec: 59.7950276979517 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.7
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.7
Flight Position: [ source = BAT ]
RA: 47.6704340786371 Dec: 59.7950276979517 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 47.6053267914638 Dec: 59.7652550813726 [deg; J2000]
{ 03h 10m 25.3s , +59d 45' 54.9" }
+/- 2.34286017616718 [arcmin] (estimated 90% radius based on SNR)
+/- 1.12536715562001 [arcmin] (formal 1-sigma fit error)
SNR: 9.01382826645089
Angular difference between Flight and Ground position is 2.656493 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 112 +/-
Measured from: 0
to: 112 [s; relative to TRIGTIME]
T50: 112 +/-
Measured from: 0
to: 112 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 112 second)
Measured from: 0
to: 112 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.108307 1.789102 0.336290 0.027712
0.105109 0.111426 0.100531 0.106165 [error]
Peak 2.108307 1.789102 0.336290 0.027712
0.105109 0.111426 0.100531 0.106165 [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 7.00e-07 6.76e-07 4.56e-07 4.81e-07 2.03e-06 2.31e-06 erg/cm2
Error 6.79e-08 5.79e-08 8.14e-08 1.61e-07 1.87e-07 2.76e-07 erg/cm2
Peak flux Power-law 2.06e-01 1.11e-01 3.75e-02 1.64e-02 3.64e-01 3.71e-01 ph/cm2/s
Error 2.05e-02 9.19e-03 6.46e-03 5.13e-03 2.73e-02 2.78e-02 ph/cm2/s
Fluence Cutoff-PL 6.54e-07 7.60e-07 3.20e-07 3.74e-08 1.77e-06 1.77e-06 erg/cm2
Error 7.59e-08 7.78e-08 1.15e-07 7.88e-08 1.98e-07 2.14e-07 erg/cm2
Peak flux Cutoff-PL 1.90e-01 1.25e-01 2.79e-02 1.75e-03 3.44e-01 3.45e-01 ph/cm2/s
Error 2.32e-02 1.25e-02 9.07e-03 3.28e-03 2.88e-02 2.90e-02 ph/cm2/s
Fluence Band 1.33e-06 2.45e-06 2.03e-06 2.79e-06 6.86e-06 8.66e-06 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 2.568 0.175 - - 1.77e-03 2.30e-04 53.230 57
CPL 1.047 0.935 21.3 12.8 1.69e-02 4.87e-02 44.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.568 0.175 - - 1.77e-03 2.30e-04 53.230 57
CPL 1.047 0.935 21.3 12.8 1.69e-02 4.87e-02 44.800 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 0.000 112.000
T90 112.000 0.000 112.000
T50 112.000 0.000 112.000
Peak 112.000 0.000 112.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
47.6053 +59.7653 0.0213 24.8 -113.3 4.2638 9.0 TRIG_01180060
------------------------------------------
Foreground time interval of the image:
0.000 112.000 (delta_t = 112.000 [sec])
Background time interval of the image:
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 0.000 sec. to 112.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56845 ( -0.169721 0.180145 )
Norm@50keV : 1.77479E-03 ( -0.000229712 0.000230001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9339 for 57 degrees of freedom
# Null hypothesis probability = 6.171700e-01
Photon flux (15-150 keV) in 112 sec: 0.363801 ( -0.0272992 0.027304 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.02655e-06 ( -1.84539e-07 1.89801e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04711 ( -1.15938 0.710631 )
Epeak [keV] : 21.3365 ( -19.4181 6.1907 )
Norm@50keV : 1.68810E-02 ( -0.016881 0.0804194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.80 using 59 PHA bins.
# Reduced chi-squared = 0.8000 for 56 degrees of freedom
# Null hypothesis probability = 8.586819e-01
Photon flux (15-150 keV) in 112 sec: 0.344409 ( -0.028714 0.028982 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.76783e-06 ( -1.83019e-07 2.1233e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08166 ( -0.914342 0.78036 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 21.1153 ( -4.45041 6.41066 )
Norm@50keV : 1.59722E-02 ( -0.0159775 0.218584 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.80 using 59 PHA bins.
# Reduced chi-squared = 0.8146 for 55 degrees of freedom
# Null hypothesis probability = 8.352578e-01
Photon flux (15-150 keV) in 112 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.86112e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.21353 (-0.574664 0.615573)
R^2/D10^2 : 0.587964 (-0.17162 0.24866)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 57 degrees of freedom
# Null hypothesis probability = 4.834610e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.673e-07 7.375e-08
25- 50 8.229e-07 8.008e-08
50-150 1.518e-07 4.419e-08
15-150 1.542e-06 1.428e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.0919 (-4.76541 6.04229)
Norm : 2.96246 (-0.477585 0.595217)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.645e-07 6.938e-08
25- 50 7.464e-07 7.067e-08
50-150 3.924e-07 1.094e-07
15-150 1.803e-06 1.730e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.66305 (-1.61037 1.93458)
R1^2/D10^2 : 5.53610 (-4.33 133.902)
kT2 [keV] : 9.38921 (-1.62059 4.48229)
R2^2/D10^2 : 0.150096 (-0.132763 0.195298)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.566e-07 3.387e-07
25- 50 7.688e-07 4.004e-07
50-150 2.903e-07 1.735e-07
15-150 1.716e-06 8.463e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56845 ( -0.169721 0.180145 )
Norm@50keV : 1.77479E-03 ( -0.000229712 0.000230001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9339 for 57 degrees of freedom
# Null hypothesis probability = 6.171700e-01
Photon flux (15-150 keV) in 112 sec: 0.363801 ( -0.0272992 0.027304 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.02655e-06 ( -1.84539e-07 1.89801e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04711 ( -1.15938 0.710631 )
Epeak [keV] : 21.3365 ( -19.4181 6.1907 )
Norm@50keV : 1.68810E-02 ( -0.016881 0.0804194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.80 using 59 PHA bins.
# Reduced chi-squared = 0.8000 for 56 degrees of freedom
# Null hypothesis probability = 8.586819e-01
Photon flux (15-150 keV) in 112 sec: 0.344409 ( -0.028714 0.028982 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.76783e-06 ( -1.83019e-07 2.1233e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 112.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08166 ( -0.914342 0.78036 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 21.1153 ( -4.45041 6.41066 )
Norm@50keV : 1.59722E-02 ( -0.0159775 0.216739 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.80 using 59 PHA bins.
# Reduced chi-squared = 0.8146 for 55 degrees of freedom
# Null hypothesis probability = 8.352578e-01
Photon flux (15-150 keV) in 112 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.77139e-06 ( -6.7706e-06 -2.24458e-06 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.21353 (-0.574664 0.615573)
R^2/D10^2 : 0.587964 (-0.17162 0.24866)
(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 5.673e-07 6.283e-08
25- 50 8.229e-07 7.806e-08
50-150 1.518e-07 4.608e-08
15-150 1.542e-06 1.523e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.0919 (-4.76541 6.04229)
Norm : 2.96246 (-0.477585 0.595217)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.645e-07 6.910e-08
25- 50 7.464e-07 7.577e-08
50-150 3.924e-07 1.130e-07
15-150 1.803e-06 1.848e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.66305 (-1.61037 1.93458)
R1^2/D10^2 : 5.53610 (-4.33 133.902)
kT2 [keV] : 9.38921 (-1.62059 4.48229)
R2^2/D10^2 : 0.150096 (-0.132763 0.195298)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.566e-07 3.412e-07
25- 50 7.688e-07 4.021e-07
50-150 2.903e-07 1.692e-07
15-150 1.716e-06 8.725e-07
Plot creation:
Fri Jul 21 11:59:31 EDT 2023