batgrbproduct analysis for trigger=1175438
batgrbproduct Analysis for Trigger=1175438
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): Wed Jun 21 19:41:08 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1175438/batgroup_hand_proc
======================================================================
Trigger: 01175438 Segment: 000
BAT Trigger Time: 708753104 [s; MET]
Trigger Stop: 708753168 [s; MET]
UTC: 2023-06-18T03:51:12.514680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 196.587853653914 Dec: 3.30563521685384 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.51
Flight Position: [ source = BAT ]
RA: 196.587853653914 Dec: 3.30563521685384 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 196.642153203078 Dec: 3.27765831625209 [deg; J2000]
{ 13h 06m 34.1s , +03d 16' 39.6" }
+/- 1.74320857299989 [arcmin] (estimated 90% radius based on SNR)
+/- 0.585350172683887 [arcmin] (formal 1-sigma fit error)
SNR: 13.7509780830901
Angular difference between Flight and Ground position is 3.660210 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 104.051999926567 +/- 22.861103937456
Measured from: -18.2480000257492
to: 85.8039999008179 [s; relative to TRIGTIME]
T50: 42.7999999523163 +/- 14.6432279761335
Measured from: -8.6599999666214
to: 34.1399999856949 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.03999996185303
to: 10.039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -27.7840000391006
to: 107.003999948502 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.602599 0.902874 0.768033 0.114716
0.073541 0.076038 0.066132 0.057699 [error]
Peak 0.020939 0.009625 0.030498 0.007920
0.006316 0.006698 0.005775 0.005069 [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 1.75e-07 3.52e-07 5.53e-07 1.92e-06 1.54e-06 3.00e-06 erg/cm2
Error 2.73e-08 3.35e-08 6.26e-08 4.73e-07 1.55e-07 5.18e-07 erg/cm2
Peak flux Power-law 9.00e-02 1.38e-01 1.59e-01 3.52e-01 4.92e-01 7.39e-01 ph/cm2/s
Error 6.17e-02 5.67e-02 4.33e-02 2.38e-01 1.42e-01 2.33e-01 ph/cm2/s
Fluence Cutoff-PL 1.61e-07 3.69e-07 5.71e-07 9.84e-07 1.49e-06 2.08e-06 erg/cm2
Error 3.24e-08 4.03e-08 6.91e-08 8.63e-07 1.70e-07 8.34e-07 erg/cm2
Peak flux Cutoff-PL 9.29e-02 1.40e-01 1.59e-01 3.42e-01 4.94e-01 7.33e-01 ph/cm2/s
Error -------- -------- 4.81e-02 -------- -------- 2.97e-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 1.350 0.154 - - 1.17e-03 1.05e-04 49.450 57
CPL 0.886 0.621 122.7 -38.5 1.99e-03 1.52e-03 47.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.796 0.562 - - 4.28e-03 1.30e-03 59.600 57
CPL 0.787 1.194 10000.0 0.0 4.31e-03 -1.48e-03 59.610 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: 55.104000 sec.
T50 in the 50-300 keV band: 30.912000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 134.788 -27.784 107.004
T90 104.052 -18.248 85.804
T50 42.800 -8.660 34.140
Peak 1.000 9.040 10.040
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
196.6422 +3.2777 0.0139 5.4 89.8 1.9489 13.8 TRIG_01175438
------------------------------------------
Foreground time interval of the image:
-27.784 73.301 (delta_t = 101.085 [sec])
Background time interval of the image:
-275.000 -27.784 (delta_t = 247.216 [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 -27.784 sec. to 107.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34969 ( -0.154007 0.153749 )
Norm@50keV : 1.16874E-03 ( -0.000104829 0.000104423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.45 using 59 PHA bins.
# Reduced chi-squared = 0.8676 for 57 degrees of freedom
# Null hypothesis probability = 7.510121e-01
Photon flux (15-150 keV) in 134.8 sec: 0.140790 ( -0.0126714 0.0126859 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53882e-06 ( -1.54186e-07 1.55633e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.784 sec. to 107.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.886313 ( -0.671572 0.569951 )
Epeak [keV] : 122.728 ( -45.6783 -122.728 )
Norm@50keV : 1.98536E-03 ( -0.000872098 0.00217593 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8507 for 56 degrees of freedom
# Null hypothesis probability = 7.791939e-01
Photon flux (15-150 keV) in 134.8 sec: 0.137890 ( -0.013226 0.0132 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48559e-06 ( -1.694e-07 1.70037e-07 ) ergs/cm2
Band function
Time interval is from -27.784 sec. to 107.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.886269 ( -0.393911 0.748741 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 122.703 ( -34.0755 -122.703 )
Norm@50keV : 1.98533E-03 ( -0.000872314 0.00217666 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 55 degrees of freedom
# Null hypothesis probability = 7.490976e-01
Photon flux (15-150 keV) in 134.8 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] : 16.6734 (-1.84771 2.12364)
R^2/D10^2 : 1.14434E-02 (-0.00384063 0.00566365)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.01 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 57 degrees of freedom
# Null hypothesis probability = 1.155570e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.779e-08 1.565e-08
25- 50 3.824e-07 5.527e-08
50-150 7.542e-07 1.355e-07
15-150 1.224e-06 1.524e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-34.5444 -200)
Norm : 0.580845 (-0.0515451 0.0515451)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.950e-07 3.383e-08
25- 50 3.750e-07 1.445e-07
50-150 8.225e-07 4.029e-07
15-150 1.392e-06 6.848e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.46688 (-2.03206 2.79053)
R1^2/D10^2 : 0.154246 (-0.104096 0.373828)
kT2 [keV] : 24.4295 (-4.7788 9.95031)
R2^2/D10^2 : 2.64321E-03 (-0.0018613 0.00237199)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.651e-07 8.037e-08
25- 50 3.589e-07 1.418e-07
50-150 9.487e-07 3.750e-07
15-150 1.473e-06 5.632e-07
Peak spectrum fit
Power-law model
Time interval is from 9.040 sec. to 10.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.795654 ( -0.601262 0.522368 )
Norm@50keV : 4.27706E-03 ( -0.00134963 0.00124564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.60 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.812814e-01
Photon flux (15-150 keV) in 1 sec: 0.491642 ( -0.141223 0.143065 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.00719e-08 ( -1.40316e-08 1.40883e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.040 sec. to 10.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.787016 ( -3.09351 -0.706476 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 4.30558E-03 ( -0.00135445 -0.0043063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.61 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 56 degrees of freedom
# Null hypothesis probability = 3.459342e-01
Photon flux (15-150 keV) in 1 sec: 0.494072 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.00466e-08 ( -1.39947e-08 1.40841e-08 ) ergs/cm2
Band function
Time interval is from 9.040 sec. to 10.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.773016 ( 0.771305 0.771305 )
beta : -0.795643 ( -0.522574 0.601319 )
Epeak [keV] : 17.4085 ( -17.425 -17.425 )
Norm@50keV : 6.04645E-03 ( -0.00305335 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.60 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.120414e-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] : 29.6309 (-9.19086 21.2576)
R^2/D10^2 : 7.51181E-03 (-0.00751326 0.0154208)
(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 1.040e-09 6.550e-10
25- 50 6.380e-09 3.878e-09
50-150 3.976e-08 2.335e-08
15-150 4.718e-08 2.908e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-79.3774 -200)
Norm : 2.02756 (-0.589145 0.589145)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.048e-09 3.064e-09
25- 50 9.711e-09 5.910e-09
50-150 2.130e-08 1.328e-08
15-150 3.606e-08 2.208e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89978 (-2.42721 3.54699)
R1^2/D10^2 : 4.63938 (-4.70086 44.4386)
kT2 [keV] : 35.5205 (-12.2832 40.9381)
R2^2/D10^2 : 4.29194E-03 (-0.00361108 0.00689482)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.486e-09 2.804e-09
25- 50 6.239e-09 3.296e-09
50-150 4.084e-08 2.367e-08
15-150 5.157e-08 2.819e-08
Plot creation:
Wed Jun 21 19:46:43 EDT 2023