batgrbproduct analysis for trigger=1221714
batgrbproduct Analysis for Trigger=1221714
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): Sun Apr 14 21:38:17 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1221714/GCN5_download_cron
======================================================================
Trigger: 01221714 Segment: 000
BAT Trigger Time: 734754069.696 [s; MET]
Trigger Stop: 734754073.792 [s; MET]
UTC: 2024-04-14T02:20:36.430320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 184.786463994455 Dec: 56.7270365800049 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.42
Image Trigger?: NO
Rate S/N Ratio: 13.6381816969859 [ if not an image trigger ]
Image S/N Ratio: 9.42
Flight Position: [ source = BAT ]
RA: 184.786463994455 Dec: 56.7270365800049 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 184.772456659638 Dec: 56.7368685240527 [deg; J2000]
{ 12h 19m 05.4s , +56d 44' 12.7" }
+/- 1.79898084212505 [arcmin] (estimated 90% radius based on SNR)
+/- 0.804981811685434 [arcmin] (formal 1-sigma fit error)
SNR: 13.1460340746891
Angular difference between Flight and Ground position is 0.748698 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 86.1999999284744 +/- 52.3427015651873
Measured from: -13.2239998579025
to: 72.9760000705719 [s; relative to TRIGTIME]
T50: 20.5439999103546 +/- 5.0489262516856
Measured from: -1.56799983978271
to: 18.9760000705719 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.03999996185303
to: 3.03999996185303 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.3799999952316
to: 125.124000072479 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.567493 2.446524 1.687050 0.371174
0.085016 0.091339 0.085106 0.084241 [error]
Peak 0.043903 0.065682 0.071095 0.023226
0.008319 0.009023 0.008602 0.008091 [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 4.96e-07 9.19e-07 1.31e-06 3.96e-06 3.74e-06 6.69e-06 erg/cm2
Error 4.00e-08 4.43e-08 8.38e-08 5.49e-07 2.00e-07 6.13e-07 erg/cm2
Peak flux Power-law 3.16e-01 4.37e-01 4.47e-01 8.33e-01 1.47e+00 2.03e+00 ph/cm2/s
Error 8.78e-02 7.37e-02 6.62e-02 2.71e-01 2.02e-01 3.12e-01 ph/cm2/s
Fluence Cutoff-PL 4.63e-07 9.59e-07 1.33e-06 2.02e-06 3.58e-06 4.78e-06 erg/cm2
Error 4.74e-08 5.45e-08 8.94e-08 1.08e-06 2.37e-07 1.09e-06 erg/cm2
Peak flux Cutoff-PL 2.93e-01 4.48e-01 4.63e-01 5.74e-01 1.45e+00 1.78e+00 ph/cm2/s
Error 9.32e-02 8.18e-02 7.97e-02 -------- 2.09e-01 4.75e-01 ph/cm2/s
Fluence Band 4.39e-07 9.84e-07 1.28e-06 3.26e-06 3.62e-06 5.97e-06 erg/cm2
Error 5.25e-08 -------- 8.87e-08 -------- 2.21e-07 -------- 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 1.485 0.085 - - 2.83e-03 1.35e-04 50.500 57
CPL 1.055 0.356 106.3 111.2 4.71e-03 2.03e-03 45.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.969 0.239 - - 1.27e-02 1.73e-03 63.900 57
CPL 0.636 0.818 224.7 0.0 1.82e-02 2.35e-02 63.520 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: 42.368000 sec.
T50 in the 50-300 keV band: 26.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 140.504 -15.380 125.124
T90 86.200 -13.224 72.976
T50 20.544 -1.568 18.976
Peak 1.000 2.040 3.040
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.7725 +56.7369 0.0146 12.3 -91.6 2.5250 13.1 TRIG_01221714
------------------------------------------
Foreground time interval of the image:
-15.380 46.705 (delta_t = 62.085 [sec])
Background time interval of the image:
-60.696 -15.380 (delta_t = 45.316 [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
Multiple GTIs in the spectrum
tstart tstop
-15.380000 114.804000
116.304000 125.124000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48541 ( -0.0846218 0.085037 )
Norm@50keV : 2.83227E-03 ( -0.000135606 0.000135178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.50 using 59 PHA bins.
# Reduced chi-squared = 0.8860 for 57 degrees of freedom
# Null hypothesis probability = 7.158152e-01
Photon flux (15-150 keV) in 139 sec: 0.352209 ( -0.0164965 0.0165102 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.74377e-06 ( -1.99743e-07 2.01223e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-15.380000 114.804000
116.304000 125.124000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05493 ( -0.370555 0.340505 )
Epeak [keV] : 106.330 ( -28.8838 193.543 )
Norm@50keV : 4.71122E-03 ( -0.00152817 0.00253103 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.75 using 59 PHA bins.
# Reduced chi-squared = 0.8169 for 56 degrees of freedom
# Null hypothesis probability = 8.342700e-01
Photon flux (15-150 keV) in 139 sec: 0.343481 ( -0.01781 0.017801 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58217e-06 ( -2.36828e-07 2.37509e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-15.380000 114.804000
116.304000 125.124000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.246228 ( -0.831805 0.376978 )
beta : -1.65169 ( 1.67049 0.166412 )
Epeak [keV] : 43.2553 ( -26.6821 84.0038 )
Norm@50keV : 3.55508E-02 ( -0.0349771 61.8561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.39 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 55 degrees of freedom
# Null hypothesis probability = 8.711204e-01
Photon flux (15-150 keV) in 139 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61796e-06 ( -3.61699e-06 -2.19954e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.3121 ( )
R^2/D10^2 : 4.61704E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 123.99 using 59 PHA bins.
# Reduced chi-squared = 2.1752 for 57 degrees of freedom
# Null hypothesis probability = 7.128541e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.770e-07 2.426e-08
25- 50 1.053e-06 6.227e-08
50-150 1.436e-06 1.501e-07
15-150 2.766e-06 1.612e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-29.5271 -200)
Norm : 1.43740 (-0.0659991 0.0659991)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.977e-07 2.565e-08
25- 50 9.574e-07 5.463e-08
50-150 2.100e-06 3.412e-07
15-150 3.555e-06 1.995e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.93858 (-1.24536 1.30944)
R1^2/D10^2 : 0.237015 (-0.0862708 0.163725)
kT2 [keV] : 28.2997 (-5.34166 9.61474)
R2^2/D10^2 : 3.22646E-03 (-0.00200943 0.00372)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.315e-07 7.186e-08
25- 50 9.948e-07 1.489e-07
50-150 2.187e-06 7.398e-07
15-150 3.614e-06 6.957e-07
Peak spectrum fit
Power-law model
Time interval is from 2.040 sec. to 3.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.968522 ( -0.244102 0.23315 )
Norm@50keV : 1.27471E-02 ( -0.00173673 0.00173112 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.90 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.470844e-01
Photon flux (15-150 keV) in 1 sec: 1.46533 ( -0.201314 0.201959 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39403e-07 ( -2.07651e-08 2.10052e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.040 sec. to 3.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.635965 ( -1.10155 0.535311 )
Epeak [keV] : 224.698 ( -224.705 -224.705 )
Norm@50keV : 1.82403E-02 ( -0.00898526 0.0380266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.52 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 56 degrees of freedom
# Null hypothesis probability = 2.286307e-01
Photon flux (15-150 keV) in 1 sec: 1.44634 ( -0.20921 0.20837 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36354e-07 ( -2.3057e-08 2.2501e-08 ) ergs/cm2
Band function
Time interval is from 2.040 sec. to 3.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91766 ( -4.91766 -4.91766 )
beta : -1.07345 ( -0.316303 0.276859 )
Epeak [keV] : 29.0991 ( -29.0991 10.2742 )
Norm@50keV : 320.201 ( -42.8433 2.26694e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 55 degrees of freedom
# Null hypothesis probability = 2.302274e-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] : 21.3037 (-3.60829 4.79985)
R^2/D10^2 : 5.80295E-02 (-0.0271831 0.0467284)
(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 4.945e-09 1.358e-09
25- 50 2.564e-08 5.725e-09
50-150 8.684e-08 2.454e-08
15-150 1.174e-07 2.421e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.1965 -200)
Norm : 5.84593 (-0.830439 0.830439)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.455e-08 8.180e-09
25- 50 2.799e-08 1.571e-08
50-150 6.140e-08 3.460e-08
15-150 1.039e-07 5.820e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.86280 (-4.43813 8.35304)
R1^2/D10^2 : 0.476203 (-0.375858 3.62567)
kT2 [keV] : 34.9180 (-13.1207 -35.6145)
R2^2/D10^2 : 1.05573E-02 (-0.00963099 0.0352117)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.049e-09 5.080e-09
25- 50 2.691e-08 1.424e-08
50-150 1.008e-07 5.455e-08
15-150 1.367e-07 6.970e-08
Plot creation:
Sun Apr 14 21:40:47 EDT 2024