batgrbproduct analysis for trigger=1054681
batgrbproduct Analysis for Trigger=1054681
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): Fri Jun 11 11:45:37 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1054681/batgroup_hand_proc
======================================================================
Trigger: 01054681 Segment: 000
BAT Trigger Time: 645047514.688 [s; MET]
Trigger Stop: 645047515.712 [s; MET]
UTC: 2021-06-10T19:51:27.514180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 243.938816073423 Dec: 14.3913470955268 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.54
Image Trigger?: NO
Rate S/N Ratio: 46.5295604965274 [ if not an image trigger ]
Image S/N Ratio: 10.54
Flight Position: [ source = BAT ]
RA: 243.938816073423 Dec: 14.3913470955268 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 243.928518473746 Dec: 14.3984723907893 [deg; J2000]
{ 16h 15m 42.8s , +14d 23' 54.5" }
+/- 0.814370488769121 [arcmin] (estimated 90% radius based on SNR)
+/- 0.397282721599225 [arcmin] (formal 1-sigma fit error)
SNR: 40.7864103070031
Angular difference between Flight and Ground position is 0.735475 arcmin
Partial Coding Fraction: 0.2460938 [ including projection effects ]
Duration
T90: 69.3839999437332 +/- 2.53414757519244
Measured from: -0.663999915122986
to: 68.7200000286102 [s; relative to TRIGTIME]
T50: 25.4399999380112 +/- 0.622009678277772
Measured from: 8.50400006771088
to: 33.944000005722 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.94800007343292
to: 8.94800007343292 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.039999961853
to: 142.472000002861 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.296134 16.739654 17.316489 5.827818
0.134215 0.158668 0.162283 0.124557 [error]
Peak 0.237698 0.495221 0.701118 0.350177
0.020299 0.027480 0.032357 0.026318 [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 3.35e-06 7.54e-06 1.34e-05 5.58e-05 3.65e-05 8.01e-05 erg/cm2
Error 1.14e-07 1.52e-07 2.00e-07 1.98e-06 5.28e-07 2.01e-06 erg/cm2
Peak flux Power-law 2.17e+00 3.60e+00 4.54e+00 1.14e+01 1.35e+01 2.17e+01 ph/cm2/s
Error 2.63e-01 2.65e-01 2.44e-01 1.37e+00 7.20e-01 1.43e+00 ph/cm2/s
Fluence Cutoff-PL 3.14e-06 7.56e-06 1.37e-05 4.56e-05 3.63e-05 7.00e-05 erg/cm2
Error 1.59e-07 1.55e-07 2.68e-07 5.20e-06 5.39e-07 5.16e-06 erg/cm2
Peak flux Cutoff-PL 2.17e+00 3.61e+00 4.54e+00 1.13e+01 1.35e+01 2.16e+01 ph/cm2/s
Error 2.92e-01 2.62e-01 2.76e-01 2.25e+00 7.19e-01 2.27e+00 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 1.172 0.027 - - 2.31e-02 3.57e-04 36.540 0
CPL 0.978 0.111 339.3 218.6 2.75e-02 2.70e-03 27.430 1
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.665 0.095 - - 1.16e-01 6.52e-03 70.060 0
CPL 0.658 0.095 9999.4 0.0 1.17e-01 2.36e-02 0.098 0
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: 59.840000 sec.
T50 in the 50-300 keV band: 19.072000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 154.512 -12.040 142.472
T90 69.384 -0.664 68.720
T50 25.440 8.504 33.944
Peak 1.000 7.948 8.948
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
243.9285 +14.3985 0.0047 38.3 43.0 19.8607 40.8 TRIG_01054681
------------------------------------------
Foreground time interval of the image:
-12.040 13.613 (delta_t = 25.653 [sec])
Background time interval of the image:
-239.688 -12.040 (delta_t = 227.648 [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 -12.040 sec. to 142.472 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17202 ( -0.0268321 0.0267324 )
Norm@50keV : 2.30972E-02 ( -0.000356951 0.000356274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 36.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.84e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 154.5 sec: 2.70094 ( -0.0459365 0.0460543 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.64965e-05 ( -5.27761e-07 5.27798e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.040 sec. to 142.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.978176 ( -0.112588 0.110085 )
Epeak [keV] : 339.269 ( -99.6395 337.656 )
Norm@50keV : 2.75054E-02 ( -0.00254704 0.00286078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 27.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 56 degrees of freedom
Photon flux (15-150 keV) in 154.5 sec: 2.66334 ( -0.04982 0.05008 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.63386e-05 ( -5.3936e-07 5.38896e-07 ) ergs/cm2
Band function
Time interval is from -12.040 sec. to 142.472 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.607735 ( -0.462844 0.718883 )
beta : -1.23596 ( 1.23601 0.0470323 )
Epeak [keV] : 111.673 ( -53.0126 408.611 )
Norm@50keV : 4.46336E-02 ( -0.0187124 0.0855855 )
------------------------------------------------------------
Photon flux (15-150 keV) in 154.5 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] : 23.0737 ( )
R^2/D10^2 : 7.81222E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 806.42 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.48e-133 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.163e-06 3.731e-08
25- 50 6.320e-06 1.599e-07
50-150 2.513e-05 4.635e-07
15-150 3.261e-05 5.021e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 12.0281 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 758.51 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.07e-123 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.627e-06 7.802e-08
25- 50 8.902e-06 1.406e-07
50-150 1.952e-05 3.244e-07
15-150 3.305e-05 5.562e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.41041 (-0.609254 0.639784)
R1^2/D10^2 : 0.817564 (-0.148203 0.191476)
kT2 [keV] : 36.7859 (-2.13849 2.59493)
R2^2/D10^2 : 1.44849E-02 (-0.00289914 0.00321523)
------------------------------------------------------------
#Fit statistic : Chi-Squared 29.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.98e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.639e-06 1.537e-07
25- 50 7.818e-06 2.318e-07
50-150 2.586e-05 6.103e-07
15-150 3.632e-05 9.038e-07
Peak spectrum fit
Power-law model
Time interval is from 7.948 sec. to 8.948 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.665326 ( -0.0955809 0.0936348 )
Norm@50keV : 0.116409 ( -0.00654709 0.00649662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.06 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.15e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.4961 ( -0.72014 0.720684 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44358e-06 ( -8.20189e-08 8.2162e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.948 sec. to 8.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.658441 ( -0.0974872 0.0932169 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 0.117352 ( -0.00621133 0.0409637 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.07 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.78e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.4981 ( -0.7244 0.714 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4436e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 7.948 sec. to 8.948 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.762266 ( 0.762246 0.762246 )
beta : -0.665326 ( -0.0936062 0.0956289 )
Epeak [keV] : 19.0468 ( -19.047 -19.047 )
Norm@50keV : 0.160182 ( -0.0502153 1.53532e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 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] : 28.6411 ( )
R^2/D10^2 : 0.240195 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 123.84 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.43e-07 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.170e-08 3.665e-09
25- 50 1.918e-07 1.640e-08
50-150 1.130e-06 8.550e-08
15-150 1.353e-06 8.800e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 49.1917 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 294.42 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.04e-33 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.225e-07 7.600e-09
25- 50 2.356e-07 2.010e-08
50-150 5.168e-07 1.151e-07
15-150 8.749e-07 1.539e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.6520 (-3.28031 3.06093)
R1^2/D10^2 : 1.44730 (-0.614554 1.44019)
kT2 [keV] : 68.5691 (-26.8493 -71.9493)
R2^2/D10^2 : 2.04360E-02 (-0.0101615 0.0411632)
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.83 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.40e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.725e-08 1.750e-08
25- 50 2.266e-07 6.360e-08
50-150 1.152e-06 5.000e-07
15-150 1.436e-06 5.952e-07
Plot creation:
Fri Jun 11 13:36:44 EDT 2021