batgrbproduct analysis for trigger=1259578
batgrbproduct Analysis for Trigger=1259578
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): Tue Oct 15 15:42:53 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1259578/batgroup_hand_proc
======================================================================
Trigger: 01259578 Segment: 000
BAT Trigger Time: 750247548.736 [s; MET]
Trigger Stop: 750247549.12 [s; MET]
UTC: 2024-10-10T10:05:14.409700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 153.365571303607 Dec: 11.5439734147466 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.61
Image Trigger?: NO
Rate S/N Ratio: 45.7055795281058 [ if not an image trigger ]
Image S/N Ratio: 11.61
Flight Position: [ source = BAT ]
RA: 153.365571303607 Dec: 11.5439734147466 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 153.367271247701 Dec: 11.5444831246222 [deg; J2000]
{ 10h 13m 28.1s , +11d 32' 40.1" }
+/- 1.12542594297902 [arcmin] (estimated 90% radius based on SNR)
+/- 0.349254973627704 [arcmin] (formal 1-sigma fit error)
SNR: 25.6926257720387
Angular difference between Flight and Ground position is 0.104508 arcmin
Partial Coding Fraction: 0.859375 [ including projection effects ]
Duration
T90: 30.8559999465942 +/- 1.3583579003067
Measured from: 0.228000044822693
to: 31.0839999914169 [s; relative to TRIGTIME]
T50: 23.2239998579025 +/- 0.661694745641074
Measured from: 4.04800009727478
to: 27.2719999551773 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0399999618530273
to: 0.960000038146973 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0439999103546143
to: 35.1240000724792 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.211203 1.364864 0.795535 0.154665
0.040986 0.042315 0.035481 0.027820 [error]
Peak 0.131503 0.205298 0.146440 0.039365
0.008725 0.009958 0.008936 0.006347 [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 3.95e-07 5.76e-07 6.25e-07 1.27e-06 1.99e-06 2.87e-06 erg/cm2
Error 2.67e-08 2.30e-08 3.59e-08 1.56e-07 8.32e-08 1.84e-07 erg/cm2
Peak flux Power-law 1.40e+00 1.42e+00 1.02e+00 1.16e+00 4.30e+00 5.00e+00 ph/cm2/s
Error 1.36e-01 8.59e-02 7.17e-02 1.67e-01 2.46e-01 2.84e-01 ph/cm2/s
Fluence Cutoff-PL 3.82e-07 5.86e-07 6.30e-07 9.35e-07 1.95e-06 2.53e-06 erg/cm2
Error 2.43e-08 2.73e-08 3.73e-08 3.28e-07 9.62e-08 3.21e-07 erg/cm2
Peak flux Cutoff-PL 1.34e+00 1.46e+00 1.04e+00 8.62e-01 4.26e+00 4.70e+00 ph/cm2/s
Error 1.60e-01 1.02e-01 8.09e-02 3.99e-01 2.53e-01 4.43e-01 ph/cm2/s
Fluence Band 3.71e-07 5.91e-07 6.18e-07 1.12e-06 1.95e-06 2.71e-06 erg/cm2
Error -------- -------- 3.98e-08 -------- 9.36e-08 -------- 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 1.881 0.076 - - 6.14e-03 2.57e-04 51.010 57
CPL 1.684 0.277 77.5 -27.1 7.75e-03 2.29e-03 49.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.483 0.096 - - 3.46e-02 1.97e-03 50.540 57
CPL 1.227 0.348 152.5 -44.0 4.66e-02 1.99e-02 49.130 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: 29.120000 sec.
T50 in the 50-300 keV band: 22.080000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 35.168 -0.044 35.124
T90 30.856 0.228 31.084
T50 23.224 4.048 27.272
Peak 1.000 -0.040 0.960
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
153.3673 +11.5445 0.0075 29.0 -13.7 1.3219 25.7 TRIG_01259578
------------------------------------------
Foreground time interval of the image:
-0.044 15.365 (delta_t = 15.409 [sec])
Background time interval of the image:
-239.736 -0.044 (delta_t = 239.692 [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 -0.044 sec. to 35.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88112 ( -0.0751194 0.0760139 )
Norm@50keV : 6.14373E-03 ( -0.000257956 0.000256612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.01 using 59 PHA bins.
# Reduced chi-squared = 0.8949 for 57 degrees of freedom
# Null hypothesis probability = 6.980522e-01
Photon flux (15-150 keV) in 35.17 sec: 0.874707 ( -0.0364524 0.0365661 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98636e-06 ( -8.30103e-08 8.32984e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.044 sec. to 35.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68373 ( -0.305324 0.248723 )
Epeak [keV] : 77.5439 ( -23.4181 -77.544 )
Norm@50keV : 7.75359E-03 ( -0.00130815 0.00327694 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.64 using 59 PHA bins.
# Reduced chi-squared = 0.8864 for 56 degrees of freedom
# Null hypothesis probability = 7.129440e-01
Photon flux (15-150 keV) in 35.17 sec: 0.862802 ( -0.040003 0.040104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95351e-06 ( -9.64326e-08 9.59684e-08 ) ergs/cm2
Band function
Time interval is from -0.044 sec. to 35.124 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.68382 ( 1.68792 0.2494 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 77.5489 ( -22.3028 -77.5489 )
Norm@50keV : 7.75099E-03 ( -0.000857678 0.00280343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.64 using 59 PHA bins.
# Reduced chi-squared = 0.9025 for 55 degrees of freedom
# Null hypothesis probability = 6.789747e-01
Photon flux (15-150 keV) in 35.17 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94873e-06 ( -1.94848e-06 -9.33869e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1902 ( )
R^2/D10^2 : 0.185292 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 204.53 using 59 PHA bins.
# Reduced chi-squared = 3.5882 for 57 degrees of freedom
# Null hypothesis probability = 1.699417e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.051e-07 1.437e-08
25- 50 6.573e-07 3.042e-08
50-150 5.934e-07 5.328e-08
15-150 1.456e-06 6.612e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 94.3228 (-12.8782 16.3957)
Norm : 3.82943 (-0.236611 0.258331)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.518e-07 2.764e-08
25- 50 6.011e-07 2.849e-08
50-150 9.416e-07 2.448e-07
15-150 1.894e-06 2.423e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65795 (-0.846762 0.883422)
R1^2/D10^2 : 1.29598 (-0.45696 0.838916)
kT2 [keV] : 23.9327 (-3.40105 4.88535)
R2^2/D10^2 : 1.09170E-02 (-0.00544427 0.00903992)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.463e-07 5.059e-08
25- 50 5.977e-07 5.891e-08
50-150 9.774e-07 1.639e-07
15-150 1.921e-06 2.152e-07
Peak spectrum fit
Power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48252 ( -0.0954366 0.0959677 )
Norm@50keV : 3.45746E-02 ( -0.00197553 0.00196781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.54 using 59 PHA bins.
# Reduced chi-squared = 0.8867 for 57 degrees of freedom
# Null hypothesis probability = 7.143835e-01
Photon flux (15-150 keV) in 1 sec: 4.29630 ( -0.246053 0.246269 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2895e-07 ( -2.04876e-08 2.05721e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22702 ( -0.396059 0.300704 )
Epeak [keV] : 152.538 ( -64.481 -152.547 )
Norm@50keV : 4.66040E-02 ( -0.0132779 0.0266015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8773 for 56 degrees of freedom
# Null hypothesis probability = 7.305198e-01
Photon flux (15-150 keV) in 1 sec: 4.25593 ( -0.25259 0.25255 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23561e-07 ( -2.2289e-08 2.2096e-08 ) ergs/cm2
Band function
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.891089 ( -2.1387 -0.896506 )
beta : -1.61410 ( -0.223489 0.145163 )
Epeak [keV] : 36.3933 ( -11.5512 47.1033 )
Norm@50keV : 1.39159 ( -1.44214 939.73 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.19 using 59 PHA bins.
# Reduced chi-squared = 0.8216 for 55 degrees of freedom
# Null hypothesis probability = 8.246582e-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] : 14.7113 ( )
R^2/D10^2 : 0.524591 ( )
(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 2.384e-08 2.350e-09
25- 50 9.303e-08 7.115e-09
50-150 1.358e-07 1.625e-08
15-150 2.527e-07 1.755e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-29.394 -200)
Norm : 17.6162 (-0.985257 0.985257)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.401e-08 2.755e-09
25- 50 8.466e-08 4.970e-09
50-150 1.857e-07 1.490e-08
15-150 3.143e-07 3.790e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.68051 (-1.36337 1.45207)
R1^2/D10^2 : 2.40216 (-0.890918 1.65267)
kT2 [keV] : 36.2426 (-9.12897 23.3045)
R2^2/D10^2 : 1.73538E-02 (-0.0129454 0.0290834)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.770e-08 6.380e-09
25- 50 9.018e-08 1.364e-08
50-150 1.991e-07 8.562e-08
15-150 3.270e-07 8.805e-08
Plot creation:
Tue Oct 15 15:48:50 EDT 2024