batgrbproduct analysis for trigger=1114077
batgrbproduct Analysis for Trigger=1114077
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): Sat Jul 2 16:14:46 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1114077/GCN5_download_cron
======================================================================
Trigger: 01114077 Segment: 000
BAT Trigger Time: 678371216 [s; MET]
Trigger Stop: 678371280 [s; MET]
UTC: 2022-07-01T12:26:26.582480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 103.789281316002 Dec: -1.47527991985016 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.99
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.99
Flight Position: [ source = BAT ]
RA: 103.789281316002 Dec: -1.47527991985016 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 103.794250464522 Dec: -1.50742522802634 [deg; J2000]
{ 06h 55m 10.6s , -01d 30' 26.7" }
+/- 3.26311506738505 [arcmin] (estimated 90% radius based on SNR)
+/- 2.06330764637962 [arcmin] (formal 1-sigma fit error)
SNR: 5.61510426363419
Angular difference between Flight and Ground position is 1.951612 arcmin
Partial Coding Fraction: 0.578125 [ including projection effects ]
Duration
T90: 274 +/- 51.9711458407451
Measured from: -166.999999880791
to: 107.000000119209 [s; relative to TRIGTIME]
T50: 131 +/- 25.0798724079689
Measured from: -96.9999998807907
to: 34.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 29
to: 30 [s; relative to TRIGTIME]
Total Fluence
Measured from: -184
to: 145 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.176391 3.107888 0.157901 -0.083155
0.143411 0.149627 0.133925 0.130819 [error]
Peak 0.046818 0.027452 0.002891 0.006371
0.007960 0.008173 0.007331 0.006948 [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 1.47e-06 1.14e-06 5.88e-07 4.39e-07 3.40e-06 3.63e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 4.06e-01 2.21e-01 7.56e-02 3.36e-02 7.21e-01 7.37e-01 ph/cm2/s
Error 1.20e-01 7.14e-02 4.81e-02 4.39e-02 1.91e-01 2.00e-01 ph/cm2/s
Fluence Cutoff-PL 1.33e-06 1.35e-06 1.52e-07 4.98e-10 2.83e-06 2.83e-06 erg/cm2
Error 1.24e-07 1.09e-07 7.59e-08 1.53e-09 1.99e-07 1.99e-07 erg/cm2
Peak flux Cutoff-PL 4.03e-01 2.50e-01 5.08e-02 2.82e-03 7.06e-01 7.07e-01 ph/cm2/s
Error 1.27e-01 9.30e-02 6.02e-02 3.83e-02 1.86e-01 1.89e-01 ph/cm2/s
Fluence Band 8.81e-07 9.13e-07 8.14e-08 3.23e-09 1.89e-06 1.89e-06 erg/cm2
Error 9.71e-08 1.10e-07 8.36e-08 3.22e-08 1.92e-07 1.97e-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 2.951 0.000 - - 8.85e-04 0.00e+00 126.720 57
CPL -1.065 1.367 23.0 2.2 4.93e-01 3.91e+00 65.550 56
The chi2 of BB fit is 65.62 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 2.550 0.614 - - 3.56e-03 1.75e-03 74.640 57
CPL 1.133 0.000 19.0 0.0 3.37e-02 0.00e+00 73.890 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 329.000 -184.000 145.000
T90 274.000 -167.000 107.000
T50 131.000 -97.000 34.000
Peak 1.000 29.000 30.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
103.7943 -1.5074 0.0342 25.4 -74.9 5.3350 5.6 TRIG_01114077
------------------------------------------
Foreground time interval of the image:
-184.000 -56.890 (delta_t = 127.110 [sec])
-56.000 49.610 (delta_t = 105.610 [sec])
51.000 145.000 (delta_t = 94.000 [sec])
Background time interval of the image:
-239.000 -184.000 (delta_t = 55.000 [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
-184.000000 -56.890200
-56.000000 49.610000
51.000000 145.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.95118 ( )
Norm@50keV : 8.84749E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 126.72 using 59 PHA bins.
# Reduced chi-squared = 2.2232 for 57 degrees of freedom
# Null hypothesis probability = 3.258625e-07
Photon flux (15-150 keV) in 326.7 sec: 0.234873 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.39742e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-184.000000 -56.890200
-56.000000 49.610000
51.000000 145.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.06512 ( -1.54476 1.18848 )
Epeak [keV] : 22.9661 ( -2.46934 1.87804 )
Norm@50keV : 0.493172 ( -0.751979 7.06684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.55 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 56 degrees of freedom
# Null hypothesis probability = 1.794296e-01
Photon flux (15-150 keV) in 326.7 sec: 0.214927 ( -0.014709 0.014729 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8296e-06 ( -1.9567e-07 2.01515e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-184.000000 -56.890200
-56.000000 49.610000
51.000000 145.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.29253 ( -1.16928 1.99437 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 23.2605 ( -2.51892 1.91338 )
Norm@50keV : 0.720571 ( -0.720545 7.15496 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.31 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 55 degrees of freedom
# Null hypothesis probability = 1.610708e-01
Photon flux (15-150 keV) in 326.7 sec: 0.215784 ( 6.78422 -0.014678 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88785e-06 ( -1.88556e-06 -1.73893e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.08814 (-0.330645 0.349652)
R^2/D10^2 : 0.799088 (-0.182166 0.237976)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.62 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.028534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.313e-06 1.250e-07
25- 50 1.351e-06 1.098e-07
50-150 1.313e-07 3.540e-08
15-150 2.795e-06 1.877e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.8275 (-2.09116 2.44183)
Norm : 2.87968 (-0.409927 0.484538)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.448e-06 1.130e-07
25- 50 1.260e-06 9.523e-08
50-150 3.719e-07 9.468e-08
15-150 3.080e-06 2.034e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.36535 (-5.34532 -5.34532)
R1^2/D10^2 : 0.833263 (-0.82291 -0.82291)
kT2 [keV] : 7.22318 (-7.13168 -7.13168)
R2^2/D10^2 : 0.162940 (-0.194866 0.824673)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.331e-06 1.696e-05
25- 50 1.344e-06 5.363e-05
50-150 1.623e-07 1.039e-04
15-150 2.837e-06 1.368e-04
Peak spectrum fit
Power-law model
Time interval is from 29.000 sec. to 30.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55021 ( -0.535554 0.692211 )
Norm@50keV : 3.55940E-03 ( -0.001711 0.00178816 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.64 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 57 degrees of freedom
# Null hypothesis probability = 5.838303e-02
Photon flux (15-150 keV) in 1 sec: 0.721301 ( -0.190292 0.191248 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60948e-08 ( -1.23315e-08 1.39494e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 29.000 sec. to 30.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13282 ( )
Epeak [keV] : 18.9823 ( )
Norm@50keV : 3.36509E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.89 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 56 degrees of freedom
# Null hypothesis probability = 5.486561e-02
Photon flux (15-150 keV) in 1 sec: 0.706424 ( -0.184168 0.188225 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.15336e-08 ( -1.07179e-08 1.62706e-08 ) ergs/cm2
Band function
Time interval is from 29.000 sec. to 30.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.87525 ( -4.87525 -4.87525 )
beta : -3.21710 ( -3.45443 0.947949 )
Epeak [keV] : 21.8988 ( -21.8988 4.85691 )
Norm@50keV : 2020.54 ( -510.808 1.75929e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.26 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 55 degrees of freedom
# Null hypothesis probability = 5.039104e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47047e-08 ( -1.46977e-08 -1.7588e-09 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.13653 (-1.65203 2.32637)
R^2/D10^2 : 2.42267 (-2.41816 6.96092)
(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 1.251e-08 7.355e-09
25- 50 1.310e-08 7.928e-09
50-150 1.314e-09 1.304e-09
15-150 2.692e-08 1.609e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.8656 (-12.3852 27.976)
Norm : 6.47674 (-2.80259 6.23024)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.240e-08 4.797e-09
25- 50 1.330e-08 7.230e-09
50-150 6.269e-09 5.234e-09
15-150 3.197e-08 1.739e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.0077 (-11.9775 -11.9775)
R1^2/D10^2 : 7.96477E-02 (-0.0804576 5.06878)
kT2 [keV] : 4.47098 (-4.46781 2.87131)
R2^2/D10^2 : 6.83665 (-6.85567 -6.85567)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.261e-08 7.770e-09
25- 50 1.236e-08 7.420e-09
50-150 6.253e-09 4.393e-09
15-150 3.122e-08 1.695e-08
Plot creation:
Sat Jul 2 16:18:07 EDT 2022