batgrbproduct analysis for trigger=1205899
batgrbproduct Analysis for Trigger=1205899
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 Jan 3 16:31:51 EST 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1205899/batgroup_hand_proc
======================================================================
Trigger: 01205899 Segment: 000
BAT Trigger Time: 725909728 [s; MET]
Trigger Stop: 725909792 [s; MET]
UTC: 2024-01-02T17:34:55.340440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 96.845998823845 Dec: -20.024026353982 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.96
Flight Position: [ source = BAT ]
RA: 96.845998823845 Dec: -20.024026353982 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 96.8479255589406 Dec: -20.0108284272413 [deg; J2000]
{ 06h 27m 23.5s , -20d 00' 39.0" }
+/- 2.37441497916363 [arcmin] (estimated 90% radius based on SNR)
+/- 0.86604965579561 [arcmin] (formal 1-sigma fit error)
SNR: 8.84318922372198
Angular difference between Flight and Ground position is 0.799291 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 119 +/- 30.5941170815567
Measured from: 11
to: 130 [s; relative to TRIGTIME]
T50: 47 +/- 16.1245154965971
Measured from: 26
to: 73 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 65
to: 66 [s; relative to TRIGTIME]
Total Fluence
Measured from: 8
to: 142 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.652283 0.717774 0.294566 0.009286
0.071543 0.073045 0.061223 0.050988 [error]
Peak 0.023326 0.014214 0.013477 0.002440
0.006418 0.006167 0.005155 0.004424 [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 1.89e-07 2.55e-07 2.54e-07 4.58e-07 8.47e-07 1.16e-06 erg/cm2
Error 3.03e-08 3.14e-08 5.47e-08 1.90e-07 1.27e-07 2.55e-07 erg/cm2
Peak flux Power-law 1.48e-01 1.30e-01 7.80e-02 7.07e-02 3.86e-01 4.26e-01 ph/cm2/s
Error 8.24e-02 4.64e-02 6.01e-02 9.04e-02 1.37e-01 1.55e-01 ph/cm2/s
Fluence Cutoff-PL 1.73e-07 2.98e-07 2.26e-07 6.28e-08 7.48e-07 7.60e-07 erg/cm2
Error 3.42e-08 4.60e-08 6.94e-08 -------- 1.31e-07 1.85e-07 erg/cm2
Peak flux Cutoff-PL 1.52e-01 1.30e-01 7.59e-02 6.61e-02 3.87e-01 4.26e-01 ph/cm2/s
Error 8.45e-02 4.60e-02 4.27e-02 8.99e-02 1.37e-01 1.59e-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 2.005 0.222 - - 6.85e-04 1.08e-04 59.890 57
CPL 0.666 1.175 39.3 12.2 4.32e-03 1.32e-02 54.960 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.734 0.730 - - 2.87e-03 1.20e-03 51.750 57
CPL 2.654 1.634 212.2 0.0 1.01e-03 0.00e+00 51.540 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 134.000 8.000 142.000
T90 119.000 11.000 130.000
T50 47.000 26.000 73.000
Peak 1.000 65.000 66.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
96.8479 -20.0108 0.0217 4.7 -39.7 1.1453 8.8 TRIG_01205899
------------------------------------------
Foreground time interval of the image:
8.000 72.701 (delta_t = 64.701 [sec])
Background time interval of the image:
-60.000 8.000 (delta_t = 68.000 [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
Time interval is from 8.000 sec. to 142.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00461 ( -0.214802 0.229463 )
Norm@50keV : 6.85156E-04 ( -0.000109508 0.000107142 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.89 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.713665e-01
Photon flux (15-150 keV) in 134 sec: 0.102992 ( -0.0123937 0.0123937 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46899e-07 ( -1.2545e-07 1.292e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.000 sec. to 142.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.665768 ( -1.3016 1.04904 )
Epeak [keV] : 39.3231 ( -10.9799 13.4721 )
Norm@50keV : 4.32422E-03 ( -0.0043242 0.0221282 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.96 using 59 PHA bins.
# Reduced chi-squared = 0.9815 for 56 degrees of freedom
# Null hypothesis probability = 5.141377e-01
Photon flux (15-150 keV) in 134 sec: 9.91110E-02 ( -0.0125115 0.012603 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.47566e-07 ( -1.22079e-07 1.40105e-07 ) ergs/cm2
Band function
Time interval is from 8.000 sec. to 142.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.630595 ( -1.4269 4.91035 )
beta : -4.11772 ( 7.19705 17.1971 )
Epeak [keV] : 39.3269 ( -8.1085 10.1144 )
Norm@50keV : 4.53216E-03 ( -0.00269623 40.7842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.89 using 59 PHA bins.
# Reduced chi-squared = 0.9980 for 55 degrees of freedom
# Null hypothesis probability = 4.788982e-01
Photon flux (15-150 keV) in 134 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] : 9.75537 (-1.23739 1.40721)
R^2/D10^2 : 5.45623E-02 (-0.0220163 0.037053)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.89 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.058567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.404e-07 3.028e-08
25- 50 3.370e-07 5.454e-08
50-150 1.637e-07 5.504e-08
15-150 6.411e-07 9.668e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.7172 (-17.753 30.1324)
Norm : 0.543010 (-0.097454 0.116975)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.832e-07 2.814e-08
25- 50 2.799e-07 4.255e-08
50-150 3.216e-07 1.077e-07
15-150 7.847e-07 1.411e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.03306 (-2.63365 2.80129)
R1^2/D10^2 : 0.349023 (-0.262822 9.46679)
kT2 [keV] : 13.7176 (-3.3376 9.08888)
R2^2/D10^2 : 1.10543E-02 (-0.0100856 0.0171848)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.758e-07 9.346e-08
25- 50 2.924e-07 1.474e-07
50-150 2.667e-07 1.570e-07
15-150 7.349e-07 3.767e-07
Peak spectrum fit
Power-law model
Time interval is from 65.000 sec. to 66.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73432 ( -0.689065 0.771104 )
Norm@50keV : 2.87108E-03 ( -0.00126126 0.00114177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.75 using 59 PHA bins.
# Reduced chi-squared = 0.9079 for 57 degrees of freedom
# Null hypothesis probability = 6.716175e-01
Photon flux (15-150 keV) in 1 sec: 0.385999 ( -0.136895 0.137087 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65174e-08 ( -1.11091e-08 1.17276e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 65.000 sec. to 66.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.65433 ( -3.06161 0.205494 )
Epeak [keV] : 212.174 ( )
Norm@50keV : 1.01202E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 0.9203 for 56 degrees of freedom
# Null hypothesis probability = 6.442107e-01
Photon flux (15-150 keV) in 1 sec: 0.386515 ( -0.137803 0.136563 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65532e-08 ( -1.18346e-08 1.15007e-08 ) ergs/cm2
Band function
Time interval is from 65.000 sec. to 66.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99750 ( -4.9975 -4.9975 )
beta : -1.77724 ( -0.924742 0.712875 )
Epeak [keV] : 19.2925 ( -19.2925 12.876 )
Norm@50keV : 1988.55 ( -700.261 5.12498e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.63 using 59 PHA bins.
# Reduced chi-squared = 0.9386 for 55 degrees of freedom
# Null hypothesis probability = 6.043476e-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] : 12.0139 (-5.64861 12.3483)
R^2/D10^2 : 8.79922E-02 (-0.0849528 0.826213)
(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 2.686e-09 1.759e-09
25- 50 8.466e-09 5.345e-09
50-150 7.353e-09 5.230e-09
15-150 1.851e-08 1.265e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.481 (-118.139 -151.68)
Norm : 1.56422 (-0.579247 1.26661)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.845e-09 2.345e-09
25- 50 7.362e-09 4.542e-09
50-150 1.593e-08 1.007e-08
15-150 2.714e-08 1.673e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.04723 (-2.37288 7.96589)
R1^2/D10^2 : 4.52863 (-4.45149 16.2227)
kT2 [keV] : 22.5432 (-11.9465 -22.544)
R2^2/D10^2 : 8.23680E-03 (-0.0081389 0.0159396)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.124e-09 3.002e-09
25- 50 5.735e-09 3.123e-09
50-150 1.562e-08 1.017e-08
15-150 2.648e-08 1.531e-08
Plot creation:
Wed Jan 3 16:48:12 EST 2024