batgrbproduct analysis for trigger=1040345
batgrbproduct Analysis for Trigger=1040345
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 Apr 4 03:20:17 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1040345/GCN5_download_cron
======================================================================
Trigger: 01040345 Segment: 000
BAT Trigger Time: 639131260.736 [s; MET]
Trigger Stop: 639131261.76 [s; MET]
UTC: 2021-04-03T08:27:13.956380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 2.76672918535528 Dec: -32.9992877873351 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.52
Image Trigger?: NO
Rate S/N Ratio: 10.5830052442584 [ if not an image trigger ]
Image S/N Ratio: 7.52
Flight Position: [ source = BAT ]
RA: 2.76672918535528 Dec: -32.9992877873351 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 2.81344379890025 Dec: -33.0242088937317 [deg; J2000]
{ 00h 11m 15.2s , -33d 01' 27.2" }
+/- 2.63787517338489 [arcmin] (estimated 90% radius based on SNR)
+/- 1.39278952109654 [arcmin] (formal 1-sigma fit error)
SNR: 7.60898289581901
Angular difference between Flight and Ground position is 2.785695 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 168.291999936104 +/- 9.2259809153922
Measured from: -35.9119998216629
to: 132.380000114441 [s; relative to TRIGTIME]
T50: 99.3199999332428 +/- 10.3071564770824
Measured from: 2.62400019168854
to: 101.944000124931 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.180000066757202
to: 1.1800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -41.5119999647141
to: 137.180000066757 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.257776 2.440147 0.988928 0.052076
0.084859 0.087471 0.075878 0.066653 [error]
Peak 0.046555 0.051025 0.032486 -0.000974
0.006861 0.007123 0.006186 0.004862 [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 7.42e-07 9.33e-07 8.54e-07 1.36e-06 2.99e-06 3.89e-06 erg/cm2
Error 5.44e-08 4.49e-08 7.21e-08 2.31e-07 1.64e-07 3.06e-07 erg/cm2
Peak flux Power-law 4.02e-01 3.53e-01 2.13e-01 1.93e-01 1.05e+00 1.16e+00 ph/cm2/s
Error 9.14e-02 5.51e-02 4.85e-02 8.41e-02 1.64e-01 1.85e-01 ph/cm2/s
Fluence Cutoff-PL 6.46e-07 1.04e-06 7.92e-07 2.61e-07 2.67e-06 2.74e-06 erg/cm2
Error 6.56e-08 6.10e-08 8.94e-08 1.61e-07 1.88e-07 2.50e-07 erg/cm2
Peak flux Cutoff-PL 3.49e-01 4.01e-01 2.21e-01 5.91e-02 1.02e+00 1.03e+00 ph/cm2/s
Error 1.08e-01 7.48e-02 5.76e-02 -------- 1.67e-01 1.85e-01 ph/cm2/s
Fluence Band 6.39e-07 1.04e-06 7.87e-07 3.55e-07 2.68e-06 2.82e-06 erg/cm2
Error 6.52e-08 6.11e-08 -------- 3.19e-07 -------- -------- 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 2.128 0.097 - - 1.80e-03 1.09e-04 73.020 57
CPL 0.930 0.515 37.4 4.8 8.51e-03 6.35e-03 52.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.731 0.264 - - 7.82e-03 1.39e-03 60.200 57
CPL 0.601 1.320 55.9 114.4 3.26e-02 1.12e-01 57.150 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: 226.560000 sec.
T50 in the 50-300 keV band: 123.136000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 178.692 -41.512 137.180
T90 168.292 -35.912 132.380
T50 99.320 2.624 101.944
Peak 1.000 0.180 1.180
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
2.8134 -33.0242 0.0252 20.1 -113.4 3.8800 7.6 TRIG_01040345
------------------------------------------
Foreground time interval of the image:
-41.512 137.180 (delta_t = 178.692 [sec])
Background time interval of the image:
-60.736 -41.512 (delta_t = 19.224 [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 -41.512 sec. to 137.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12764 ( -0.0953426 0.097775 )
Norm@50keV : 1.79833E-03 ( -0.000109123 0.000108114 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 73.02 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.48e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 178.7 sec: 0.286845 ( -0.0142075 0.014232 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9943e-06 ( -1.62975e-07 1.64463e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -41.512 sec. to 137.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.929586 ( -0.545044 0.485349 )
Epeak [keV] : 37.4260 ( -5.30823 4.31087 )
Norm@50keV : 8.50715E-03 ( -0.00394133 0.00876161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.19e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 178.7 sec: 0.267996 ( -0.015673 0.01574 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67367e-06 ( -1.839e-07 1.92674e-07 ) ergs/cm2
Band function
Time interval is from -41.512 sec. to 137.180 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.941903 ( -0.455082 0.511584 )
beta : -9.36925 ( 9.36925 19.3692 )
Epeak [keV] : 37.3800 ( -3.7167 4.33744 )
Norm@50keV : 8.37256E-03 ( -0.0038039 0.0122426 )
------------------------------------------------------------
Photon flux (15-150 keV) in 178.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67714e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0259 (-0.52431 0.552834)
R^2/D10^2 : 0.126464 (-0.0241849 0.0299293)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 91.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.33e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.630e-07 4.074e-08
25- 50 1.156e-06 6.406e-08
50-150 6.076e-07 8.587e-08
15-150 2.226e-06 1.188e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.2321 (-7.36128 8.73455)
Norm : 1.53926 (-0.134182 0.136881)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.88e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.812e-07 5.066e-08
25- 50 1.010e-06 5.227e-08
50-150 1.070e-06 1.367e-07
15-150 2.761e-06 1.564e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.49318 (-1.21994 1.62194)
R1^2/D10^2 : 1.52264 (-1.01599 3.261)
kT2 [keV] : 13.0948 (-1.55854 2.76791)
R2^2/D10^2 : 3.60774E-02 (-0.0219724 0.031021)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.31 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.39e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.573e-07 2.481e-07
25- 50 1.024e-06 2.320e-07
50-150 8.909e-07 1.955e-07
15-150 2.572e-06 4.959e-07
Peak spectrum fit
Power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73104 ( -0.255953 0.272118 )
Norm@50keV : 7.81647E-03 ( -0.00140346 0.00137096 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.61e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.04963 ( -0.163586 0.163629 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22103e-08 ( -1.32463e-08 1.35615e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.601051 ( -1.53246 1.1079 )
Epeak [keV] : 55.9206 ( -14.3383 214.412 )
Norm@50keV : 3.25694E-02 ( -0.0325804 0.19216 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.15 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.32e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.01655 ( -0.16738 0.16711 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.65329e-08 ( -1.36258e-08 1.45795e-08 ) ergs/cm2
Band function
Time interval is from 0.180 sec. to 1.180 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.723203 ( -0.888907 1.22595 )
beta : -8.83233 ( 9.25368 19.2537 )
Epeak [keV] : 58.3793 ( -28.8051 241.15 )
Norm@50keV : 2.75093E-02 ( -0.027858 16.4314 )
------------------------------------------------------------
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] : 12.2480 (-1.94087 2.36653)
R^2/D10^2 : 0.248147 (-0.118493 0.216524)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.60 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.15e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.885e-09 2.143e-09
25- 50 2.541e-08 5.710e-09
50-150 2.323e-08 8.105e-09
15-150 5.653e-08 1.421e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.9399 (-36.602 -99.9871)
Norm : 4.71049 (-0.858106 0.995928)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.16 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.32e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.231e-08 2.673e-09
25- 50 2.129e-08 4.990e-09
50-150 3.448e-08 2.324e-08
15-150 6.808e-08 2.434e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.82356 (-1.98161 24.9733)
R1^2/D10^2 : 8.66183 (-5.55489 535.055)
kT2 [keV] : 14.9238 (-3.19127 17.1471)
R2^2/D10^2 : 0.107211 (-0.104004 0.142887)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.64 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.14e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.131e-08 6.060e-09
25- 50 2.178e-08 1.192e-08
50-150 2.994e-08 1.810e-08
15-150 6.303e-08 2.980e-08
Plot creation:
Sun Apr 4 03:23:16 EDT 2021