batgrbproduct analysis for trigger=1035994
batgrbproduct Analysis for Trigger=1035994
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 Mar 7 11:37:50 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1035994/batgroup_hand_proc
======================================================================
Trigger: 01035994 Segment: 000
BAT Trigger Time: 636695663.86 [s; MET]
Trigger Stop: 636695663.924 [s; MET]
UTC: 2021-03-06T03:53:57.241940 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 129.964614535563 Dec: 60.1962629275143 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.16
Image Trigger?: NO
Rate S/N Ratio: 75.3724087448451 [ if not an image trigger ]
Image S/N Ratio: 14.16
Flight Position: [ source = BAT ]
RA: 129.964614535563 Dec: 60.1962629275143 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 129.963670604573 Dec: 60.2031823553209 [deg; J2000]
{ 08h 39m 51.3s , +60d 12' 11.5" }
+/- 0.641679632664837 [arcmin] (estimated 90% radius based on SNR)
+/- 0.159352049516393 [arcmin] (formal 1-sigma fit error)
SNR: 57.3294817858125
Angular difference between Flight and Ground position is 0.416119 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 9.12000000476837 +/- 0.314069974986848
Measured from: 0.0759999752044678
to: 9.19599997997284 [s; relative to TRIGTIME]
T50: 4.31200003623962 +/- 0.166373108105758
Measured from: 3.41199994087219
to: 7.72399997711182 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.50399994850159
to: 8.50399994850159 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.175999999046326
to: 13.1640000343323 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.104704 4.070796 2.359570 0.354376
0.052991 0.058518 0.047594 0.032120 [error]
Peak 0.636306 0.960331 0.626900 0.069487
0.020904 0.024787 0.020666 0.011236 [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 1.21e-06 1.74e-06 1.85e-06 3.66e-06 5.95e-06 8.47e-06 erg/cm2
Error 4.94e-08 4.19e-08 5.19e-08 2.24e-07 1.31e-07 2.59e-07 erg/cm2
Peak flux Power-law 8.06e+00 7.01e+00 4.17e+00 3.74e+00 2.09e+01 2.30e+01 ph/cm2/s
Error 4.48e-01 2.48e-01 1.72e-01 3.02e-01 7.34e-01 7.60e-01 ph/cm2/s
Fluence Cutoff-PL 1.03e-06 1.82e-06 1.94e-06 1.58e-06 5.66e-06 6.37e-06 erg/cm2
Error 6.30e-08 4.80e-08 5.89e-08 2.94e-07 1.48e-07 3.30e-07 erg/cm2
Peak flux Cutoff-PL 6.43e+00 7.64e+00 4.61e+00 1.50e+00 1.98e+01 2.02e+01 ph/cm2/s
Error 5.45e-01 2.98e-01 2.10e-01 2.99e-01 7.62e-01 8.31e-01 ph/cm2/s
Fluence Band 9.82e-07 1.84e-06 1.89e-06 2.43e-06 5.65e-06 7.16e-06 erg/cm2
Error 7.16e-08 5.54e-08 6.88e-08 -------- 1.45e-07 -------- erg/cm2
Peak flux Band 6.45e+00 7.63e+00 4.61e+00 1.53e+00 1.98e+01 2.02e+01 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 1.908 0.040 - - 4.85e-02 1.07e-03 111.380 57
CPL 1.155 0.192 58.4 3.9 1.11e-01 2.33e-02 59.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.748 0.054 - - 1.54e-01 5.21e-03 103.130 57
CPL 0.626 0.270 62.8 4.7 5.51e-01 1.69e-01 39.520 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: 8.128000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.340 -0.176 13.164
T90 9.120 0.076 9.196
T50 4.312 3.412 7.724
Peak 1.000 7.504 8.504
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
129.9637 +60.2032 0.0033 31.6 -124.3 9.6942 57.3 TRIG_01035994
------------------------------------------
Foreground time interval of the image:
-0.176 9.241 (delta_t = 9.417 [sec])
Background time interval of the image:
-239.860 -0.176 (delta_t = 239.684 [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 -0.176 sec. to 13.164 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90808 ( -0.0400925 0.0402292 )
Norm@50keV : 4.84715E-02 ( -0.00107089 0.00107037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 111.38 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.22e-05 with 57 degrees of freedom
Photon flux (15-150 keV) in 13.34 sec: 6.98014 ( -0.179037 0.179765 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94521e-06 ( -1.30863e-07 1.30897e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.176 sec. to 13.164 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15528 ( -0.196112 0.188069 )
Epeak [keV] : 58.3807 ( -3.50754 4.36061 )
Norm@50keV : 0.110915 ( -0.0203401 0.0261815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.63e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 13.34 sec: 6.56156 ( -0.1991 0.20054 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.65676e-06 ( -1.48154e-07 1.47954e-07 ) ergs/cm2
Band function
Time interval is from -0.176 sec. to 13.164 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.893077 ( -0.30574 0.535257 )
beta : -2.37642 ( -0.390512 0.195724 )
Epeak [keV] : 52.7695 ( -7.54348 6.00203 )
Norm@50keV : 0.155651 ( -0.048337 0.170145 )
------------------------------------------------------------
Photon flux (15-150 keV) in 13.34 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.64748e-06 ( -5.64738e-06 -1.45073e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4980 ( )
R^2/D10^2 : 1.01571 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 372.09 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.45e-48 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.229e-07 2.274e-08
25- 50 1.874e-06 4.869e-08
50-150 2.205e-06 8.538e-08
15-150 4.602e-06 1.134e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.7484 (-6.60448 7.44854)
Norm : 30.5254 (-1.11118 1.15897)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.38 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.55e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-06 4.529e-08
25- 50 1.815e-06 4.802e-08
50-150 2.832e-06 4.309e-07
15-150 5.711e-06 5.069e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.60733 (-0.723785 0.751616)
R1^2/D10^2 : 5.64372 (-1.44251 2.21026)
kT2 [keV] : 22.4442 (-2.03549 2.74191)
R2^2/D10^2 : 0.101126 (-0.0394669 0.0526736)
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.09e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.816e-07 6.503e-08
25- 50 1.878e-06 9.005e-08
50-150 2.778e-06 2.054e-07
15-150 5.538e-06 2.915e-07
Peak spectrum fit
Power-law model
Time interval is from 7.504 sec. to 8.504 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74771 ( -0.0540567 0.0544539 )
Norm@50keV : 0.154335 ( -0.00521022 0.00520349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 103.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.78e-04 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 20.8512 ( -0.733056 0.734311 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4243e-06 ( -4.92084e-08 4.92674e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.504 sec. to 8.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.625792 ( -0.27729 0.261736 )
Epeak [keV] : 62.7857 ( -4.11521 5.33666 )
Norm@50keV : 0.551085 ( -0.138819 0.198943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.53e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 19.7720 ( -0.7613 0.7637 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35361e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 7.504 sec. to 8.504 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.625624 ( -0.22757 0.282866 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 62.7720 ( -3.77147 5.32836 )
Norm@50keV : 0.551198 ( -0.138933 0.198986 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 19.7994 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35524e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0475 ( )
R^2/D10^2 : 2.93346 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 150.70 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.14e-10 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.222e-07 7.350e-09
25- 50 4.562e-07 1.845e-08
50-150 5.938e-07 3.570e-08
15-150 1.172e-06 4.400e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 115.088 (-12.1224 19.9013)
Norm : 91.2631 (-4.46984 3.8298)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.78 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.10e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.248e-07 1.455e-08
25- 50 4.048e-07 2.185e-08
50-150 7.357e-07 1.693e-07
15-150 1.365e-06 1.880e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.07663 (-1.05436 1.15706)
R1^2/D10^2 : 18.3908 (-6.72153 12.8664)
kT2 [keV] : 20.1107 (-1.84215 2.56968)
R2^2/D10^2 : 0.580379 (-0.244475 0.31435)
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.66 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.41e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.948e-07 2.875e-08
25- 50 4.350e-07 3.910e-08
50-150 7.133e-07 7.635e-08
15-150 1.343e-06 1.200e-07
Plot creation:
Sun Mar 7 11:45:15 EST 2021