batgrbproduct analysis for trigger=1186304
batgrbproduct Analysis for Trigger=1186304
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): Mon Aug 21 20:45:07 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1186304/GCN5_download_cron
======================================================================
Trigger: 01186304 Segment: 000
BAT Trigger Time: 714255328 [s; MET]
Trigger Stop: 714255648 [s; MET]
UTC: 2023-08-20T20:14:56.138160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.276944097455 Dec: 36.0593276846844 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.16
Flight Position: [ source = BAT ]
RA: 297.276944097455 Dec: 36.0593276846844 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.254670700478 Dec: 36.0684148499305 [deg; J2000]
{ 19h 49m 01.1s , +36d 04' 06.3" }
+/- 2.11286237734074 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1451237052048 [arcmin] (formal 1-sigma fit error)
SNR: 10.4476027619129
Angular difference between Flight and Ground position is 1.210090 arcmin
Partial Coding Fraction: 0.2070312 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.858260 3.187263 1.908389 0.346885
0.232418 0.236721 0.200692 0.168317 [error]
Peak 1.858260 3.187263 1.908389 0.346885
0.232418 0.236721 0.200692 0.168317 [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 9.09e-07 1.38e-06 1.58e-06 3.43e-06 4.89e-06 7.30e-06 erg/cm2
Error 1.32e-07 1.30e-07 1.97e-07 8.69e-07 4.83e-07 1.05e-06 erg/cm2
Peak flux Power-law 1.21e-01 1.02e-01 5.80e-02 4.91e-02 3.03e-01 3.30e-01 ph/cm2/s
Error 1.79e-02 9.75e-03 7.02e-03 1.15e-02 2.92e-02 3.04e-02 ph/cm2/s
Fluence Cutoff-PL 7.86e-07 1.55e-06 1.64e-06 9.67e-07 4.60e-06 4.94e-06 erg/cm2
Error 1.53e-07 1.74e-07 2.31e-07 8.35e-07 5.20e-07 9.63e-07 erg/cm2
Peak flux Cutoff-PL 1.04e-01 1.13e-01 6.16e-02 1.81e-02 2.91e-01 2.96e-01 ph/cm2/s
Error 2.09e-02 1.25e-02 8.27e-03 -------- 3.00e-02 3.25e-02 ph/cm2/s
Fluence Band 7.54e-07 1.59e-06 1.52e-06 2.55e-06 4.72e-06 6.42e-06 erg/cm2
Error 1.73e-07 1.92e-07 2.13e-07 -------- 4.95e-07 -------- erg/cm2
Peak flux Band 9.78e-02 1.18e-01 5.65e-02 3.77e-02 2.90e-01 3.10e-01 ph/cm2/s
Error 2.36e-02 1.44e-02 7.54e-03 -------- 2.98e-02 3.26e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.810 0.152 - - 2.19e-03 2.13e-04 48.980 57
CPL 0.779 0.745 56.0 15.9 7.67e-03 8.50e-03 41.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.810 0.152 - - 2.19e-03 2.13e-04 48.980 57
CPL 0.779 0.745 56.0 15.9 7.67e-03 8.50e-03 41.750 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.2547 +36.0684 0.0184 51.8 -159.3 7.7458 10.4 TRIG_01186304
------------------------------------------
Foreground time interval of the image:
0.000 243.044 (delta_t = 243.044 [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 243.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81019 ( -0.150782 0.154052 )
Norm@50keV : 2.18731E-03 ( -0.000213309 0.000211831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 57 degrees of freedom
# Null hypothesis probability = 7.662480e-01
Photon flux (15-150 keV) in 243 sec: 0.302605 ( -0.0291259 0.0292108 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.89157e-06 ( -4.81638e-07 4.84078e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 243.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.778591 ( -0.810863 0.67961 )
Epeak [keV] : 55.9940 ( -9.48845 22.3949 )
Norm@50keV : 7.66684E-03 ( -0.00425485 0.0127527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
# Reduced chi-squared = 0.7455 for 56 degrees of freedom
# Null hypothesis probability = 9.218076e-01
Photon flux (15-150 keV) in 243 sec: 0.291321 ( -0.029987 0.030077 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.60004e-06 ( -5.17809e-07 5.2279e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 243.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93549 ( -6.01049 -4.93549 )
beta : -2.07057 ( -0.275617 0.205232 )
Epeak [keV] : 28.5002 ( -4.63566 3.81514 )
Norm@50keV : 121.826 ( -11.0567 296.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.52 using 59 PHA bins.
# Reduced chi-squared = 0.7185 for 55 degrees of freedom
# Null hypothesis probability = 9.426775e-01
Photon flux (15-150 keV) in 243 sec: 0.290141 ( 6.70986 -0.029775 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7229e-06 ( -4.7212e-06 -4.93849e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4250 (-1.24305 1.38514)
R^2/D10^2 : 6.56254E-02 (-0.02176 0.0322143)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.350573e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.218e-07 8.845e-08
25- 50 1.710e-06 1.978e-07
50-150 1.623e-06 2.907e-07
15-150 3.854e-06 4.228e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.8618 (-25.2912 42.2857)
Norm : 1.35529 (-0.171277 0.198758)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.608e-07 1.243e-07
25- 50 1.485e-06 1.471e-07
50-150 2.391e-06 8.198e-07
15-150 4.736e-06 9.149e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.72804 (-2.13786 2.26404)
R1^2/D10^2 : 0.257966 (-0.139172 0.452178)
kT2 [keV] : 22.9271 (-6.46287 19.5566)
R2^2/D10^2 : 4.14746E-03 (-0.00373213 0.00701175)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.552e-07 2.985e-07
25- 50 1.606e-06 5.961e-07
50-150 2.299e-06 1.136e-06
15-150 4.660e-06 1.964e-06
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 243.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81019 ( -0.150782 0.154052 )
Norm@50keV : 2.18731E-03 ( -0.000213309 0.000211831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 57 degrees of freedom
# Null hypothesis probability = 7.662480e-01
Photon flux (15-150 keV) in 243 sec: 0.302605 ( -0.0291259 0.0292108 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.89157e-06 ( -4.81638e-07 4.84078e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 243.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.778591 ( -0.810863 0.67961 )
Epeak [keV] : 55.9940 ( -9.48845 22.3949 )
Norm@50keV : 7.66684E-03 ( -0.00425485 0.0127527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
# Reduced chi-squared = 0.7455 for 56 degrees of freedom
# Null hypothesis probability = 9.218076e-01
Photon flux (15-150 keV) in 243 sec: 0.291321 ( -0.029987 0.030077 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.60004e-06 ( -5.17809e-07 5.2279e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 243.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93549 ( -6.01049 -4.93549 )
beta : -2.07057 ( -0.275617 0.205232 )
Epeak [keV] : 28.5002 ( -4.63566 3.81514 )
Norm@50keV : 121.826 ( -11.0567 296.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.52 using 59 PHA bins.
# Reduced chi-squared = 0.7185 for 55 degrees of freedom
# Null hypothesis probability = 9.426775e-01
Photon flux (15-150 keV) in 243 sec: 0.290141 ( 6.70986 -0.029775 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7229e-06 ( -4.7212e-06 -4.93849e-07 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4250 (-1.24305 1.38514)
R^2/D10^2 : 6.56254E-02 (-0.02176 0.0322143)
(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 5.218e-07 8.991e-08
25- 50 1.710e-06 1.875e-07
50-150 1.623e-06 3.153e-07
15-150 3.854e-06 4.350e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.8618 (-25.2912 42.2857)
Norm : 1.35529 (-0.171277 0.198758)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.608e-07 1.270e-07
25- 50 1.485e-06 1.448e-07
50-150 2.391e-06 8.207e-07
15-150 4.736e-06 9.611e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.72804 (-2.13786 2.26404)
R1^2/D10^2 : 0.257966 (-0.139172 0.452178)
kT2 [keV] : 22.9271 (-6.46287 19.5566)
R2^2/D10^2 : 4.14746E-03 (-0.00373213 0.00701175)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.552e-07 3.129e-07
25- 50 1.606e-06 6.443e-07
50-150 2.299e-06 1.195e-06
15-150 4.660e-06 1.863e-06
Plot creation:
Mon Aug 21 20:47:04 EDT 2023