batgrbproduct analysis for trigger=1069788
batgrbproduct Analysis for Trigger=1069788
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): Mon Aug 23 15:20:38 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1069788/GCN5_download_cron
======================================================================
Trigger: 01069788 Segment: 000
BAT Trigger Time: 651316725.76 [s; MET]
Trigger Stop: 651316725.888 [s; MET]
UTC: 2021-08-22T09:18:18.167540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 304.47624416316 Dec: 5.26505347483776 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.75
Image Trigger?: NO
Rate S/N Ratio: 157.565859246221 [ if not an image trigger ]
Image S/N Ratio: 18.75
Flight Position: [ source = BAT ]
RA: 304.47624416316 Dec: 5.26505347483776 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 304.461117823584 Dec: 5.26524567435665 [deg; J2000]
{ 20h 17m 50.7s , +05d 15' 54.9" }
+/- 0.528370755785363 [arcmin] (estimated 90% radius based on SNR)
+/- 0.129343104293522 [arcmin] (formal 1-sigma fit error)
SNR: 75.6693727248073
Angular difference between Flight and Ground position is 0.903825 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 180.784000039101 +/- 42.7280749371796
Measured from: 0.256000161170959
to: 181.040000200272 [s; relative to TRIGTIME]
T50: 8.49600005149841 +/- 0.47571414557823
Measured from: 2.52800011634827
to: 11.0240001678467 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.00400006771087646
to: 1.00400006771088 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.368000030517578
to: 402.65600001812 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.380506 10.331349 9.024481 2.954635
0.146160 0.150468 0.133116 0.110775 [error]
Peak 0.579264 1.182543 1.284633 0.424140
0.018470 0.024559 0.026954 0.020277 [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 2.13e-06 4.43e-06 7.19e-06 2.62e-05 1.99e-05 3.99e-05 erg/cm2
Error 9.57e-08 1.13e-07 1.51e-07 1.38e-06 3.84e-07 1.41e-06 erg/cm2
Peak flux Power-law 6.10e+00 8.32e+00 8.38e+00 1.53e+01 2.77e+01 3.81e+01 ph/cm2/s
Error 3.17e-01 2.60e-01 2.26e-01 9.05e-01 7.05e-01 1.05e+00 ph/cm2/s
Fluence Cutoff-PL 2.14e-06 4.44e-06 7.19e-06 2.59e-05 1.99e-05 3.96e-05 erg/cm2
Error 9.25e-08 1.11e-07 1.50e-07 -------- 3.83e-07 1.27e-06 erg/cm2
Peak flux Cutoff-PL 5.40e+00 8.45e+00 8.81e+00 1.03e+01 2.72e+01 3.30e+01 ph/cm2/s
Error 4.12e-01 2.78e-01 2.92e-01 1.67e+00 7.34e-01 1.83e+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 1.302 0.038 - - 4.99e-03 9.70e-05 46.990 57
CPL 1.296 0.039 9999.4 0.0 5.01e-03 9.52e-05 47.300 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.990 0.044 - - 2.41e-01 6.02e-03 68.030 57
CPL 0.564 0.186 199.3 71.8 3.68e-01 6.65e-02 51.210 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: 121.664000 sec.
T50 in the 50-300 keV band: 7.680000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 403.024 -0.368 402.656
T90 180.784 0.256 181.040
T50 8.496 2.528 11.024
Peak 1.000 0.004 1.004
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
304.4611 +5.2652 0.0025 24.3 49.5 18.7573 75.7 TRIG_01069788
------------------------------------------
Foreground time interval of the image:
-0.368 9.141 (delta_t = 9.509 [sec])
Background time interval of the image:
-239.760 -144.370 (delta_t = 95.390 [sec])
-142.760 -0.368 (delta_t = 142.392 [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 -0.368 sec. to 402.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30189 ( -0.0384701 0.0383497 )
Norm@50keV : 4.99349E-03 ( -9.70846e-05 9.68158e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8245 for 57 degrees of freedom
# Null hypothesis probability = 8.250679e-01
Photon flux (15-150 keV) in 403 sec: 0.595945 ( -0.0132543 0.0133092 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98768e-05 ( -3.8358e-07 3.83964e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.368 sec. to 402.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29583 ( -0.0371168 0.0404898 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 5.00677E-03 ( -9.47523e-05 9.57343e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.30 using 59 PHA bins.
# Reduced chi-squared = 0.8446 for 56 degrees of freedom
# Null hypothesis probability = 7.896073e-01
Photon flux (15-150 keV) in 403 sec: 0.596435 ( -0.014222 0.012517 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98718e-05 ( -3.77571e-07 3.88371e-07 ) ergs/cm2
Band function
Time interval is from -0.368 sec. to 402.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00631 ( 1.00795 1.00795 )
beta : -1.30186 ( -0.0383604 0.0384562 )
Epeak [keV] : 48.6267 ( -47.3711 -47.3711 )
Norm@50keV : 9.68224E-03 ( -0.00314365 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8545 for 55 degrees of freedom
# Null hypothesis probability = 7.701308e-01
Photon flux (15-150 keV) in 403 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] : 20.9015 ( )
R^2/D10^2 : 2.18566E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 688.06 using 59 PHA bins.
# Reduced chi-squared = 12.071 for 57 degrees of freedom
# Null hypothesis probability = 4.194649e-109
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.285e-07 3.083e-08
25- 50 3.733e-06 1.211e-07
50-150 1.215e-05 3.486e-07
15-150 1.661e-05 3.667e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.56590 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.575e-06 5.743e-08
25- 50 4.953e-06 1.149e-07
50-150 1.086e-05 2.478e-07
15-150 1.839e-05 4.111e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71157 (-0.580965 0.625786)
R1^2/D10^2 : 0.416177 (-0.100374 0.138649)
kT2 [keV] : 34.8655 (-2.49373 3.09651)
R2^2/D10^2 : 3.57345E-03 (-0.000838971 0.000969512)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.001e-06 1.261e-07
25- 50 4.498e-06 1.894e-07
50-150 1.361e-05 5.118e-07
15-150 2.011e-05 6.972e-07
Peak spectrum fit
Power-law model
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.990109 ( -0.0440388 0.0438935 )
Norm@50keV : 0.240859 ( -0.00602638 0.00602229 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.03 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 57 degrees of freedom
# Null hypothesis probability = 1.504893e-01
Photon flux (15-150 keV) in 1 sec: 27.7174 ( -0.705594 0.705009 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6136e-06 ( -7.09431e-08 7.13084e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.564371 ( -0.189587 0.181833 )
Epeak [keV] : 199.266 ( -43.3028 100.258 )
Norm@50keV : 0.367688 ( -0.0593121 0.0737038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.21 using 59 PHA bins.
# Reduced chi-squared = 0.9144 for 56 degrees of freedom
# Null hypothesis probability = 6.564710e-01
Photon flux (15-150 keV) in 1 sec: 27.2043 ( -0.7335 0.7342 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56958e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.004 sec. to 1.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99996 ( -0.000225765 -4.99996 )
beta : -1.05091 ( -0.0497116 0.0492951 )
Epeak [keV] : 30.7005 ( -3.90396 2.65465 )
Norm@50keV : 4840.25 ( -119.253 5800.79 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.80 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.722788e-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] : 22.3264 ( )
R^2/D10^2 : 0.958667 ( )
(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 8.784e-08 4.280e-09
25- 50 4.685e-07 1.785e-08
50-150 1.745e-06 7.400e-08
15-150 2.301e-06 7.200e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 112.326 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.797e-07 7.000e-09
25- 50 5.380e-07 1.340e-08
50-150 1.180e-06 3.150e-08
15-150 1.998e-06 5.500e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.21181 (-1.18146 1.32199)
R1^2/D10^2 : 7.42707 (-2.23774 3.60296)
kT2 [keV] : 34.6097 (-3.3545 4.80908)
R2^2/D10^2 : 0.206130 (-0.0712532 0.0838182)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.594e-07 1.805e-08
25- 50 5.029e-07 3.825e-08
50-150 1.923e-06 1.555e-07
15-150 2.585e-06 1.845e-07
Plot creation:
Mon Aug 23 15:26:00 EDT 2021