batgrbproduct analysis for trigger=1095215
batgrbproduct Analysis for Trigger=1095215
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 6 19:46:01 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1095215/GCN5_download_cron
======================================================================
Trigger: 01095215 Segment: 000
BAT Trigger Time: 668189617.344 [s; MET]
Trigger Stop: 668189618.368 [s; MET]
UTC: 2022-03-05T16:13:08.615720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 107.584441518432 Dec: -37.708465082534 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.18
Image Trigger?: NO
Rate S/N Ratio: 14 [ if not an image trigger ]
Image S/N Ratio: 7.18
Flight Position: [ source = BAT ]
RA: 107.584441518432 Dec: -37.708465082534 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 107.61015346364 Dec: -37.702546521895 [deg; J2000]
{ 07h 10m 26.4s , -37d 42' 09.2" }
+/- 1.4672642768138 [arcmin] (estimated 90% radius based on SNR)
+/- 0.523089332063683 [arcmin] (formal 1-sigma fit error)
SNR: 17.5893308181944
Angular difference between Flight and Ground position is 1.271153 arcmin
Partial Coding Fraction: 0.2539062 [ including projection effects ]
Duration
T90: 21.1200000047684 +/- 3.65158593433256
Measured from: -11.8879998922348
to: 9.23200011253357 [s; relative to TRIGTIME]
T50: 9.69600009918213 +/- 1.93626445995864
Measured from: -6.5919998884201
to: 3.10400021076202 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.156000018119812
to: 0.843999981880188 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.039999961853
to: 11.0240000486374 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.918033 1.219745 0.773266 0.311311
0.084773 0.090138 0.079494 0.069268 [error]
Peak 0.049498 0.123857 0.073371 0.059720
0.017941 0.020446 0.018171 0.015815 [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 3.18e-07 5.29e-07 6.69e-07 1.69e-06 1.99e-06 3.20e-06 erg/cm2
Error 4.40e-08 4.51e-08 8.01e-08 4.28e-07 1.89e-07 4.95e-07 erg/cm2
Peak flux Power-law 7.00e-01 6.88e-01 4.73e-01 5.13e-01 2.07e+00 2.37e+00 ph/cm2/s
Error 2.52e-01 1.65e-01 1.36e-01 2.85e-01 4.80e-01 5.50e-01 ph/cm2/s
Fluence Cutoff-PL 3.18e-07 5.30e-07 6.69e-07 1.67e-06 1.99e-06 3.18e-06 erg/cm2
Error 4.38e-08 4.97e-08 8.11e-08 4.42e-07 1.96e-07 7.55e-07 erg/cm2
Peak flux Cutoff-PL 5.97e-01 7.70e-01 5.13e-01 1.88e-01 2.01e+00 2.07e+00 ph/cm2/s
Error 2.81e-01 2.19e-01 1.64e-01 2.23e-01 4.86e-01 5.84e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 6.22e-01 7.51e-01 5.10e-01 2.41e-01 2.04e+00 2.12e+00 ph/cm2/s
Error 2.11e-01 -------- -------- -------- 4.91e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.662 0.152 - - 8.21e-03 7.30e-04 61.660 57
CPL 1.663 0.157 9999.4 -0.0 8.21e-03 6.23e-03 61.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.540 0.363 - - 1.64e-02 3.87e-03 86.150 57
CPL 0.503 1.899 70.1 -14.1 5.69e-02 1.00e+00 84.470 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: 13.504000 sec.
T50 in the 50-300 keV band: 5.760000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.064 -15.040 11.024
T90 21.120 -11.888 9.232
T50 9.696 -6.592 3.104
Peak 1.000 -0.156 0.844
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
107.6102 -37.7025 0.0110 38.1 -67.9 3.4043 17.6 TRIG_01095215
------------------------------------------
Foreground time interval of the image:
-15.040 11.024 (delta_t = 26.064 [sec])
Background time interval of the image:
-239.344 -77.684 (delta_t = 161.660 [sec])
-76.344 -15.040 (delta_t = 61.304 [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 -15.040 sec. to 11.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66209 ( -0.150848 0.153561 )
Norm@50keV : 8.20576E-03 ( -0.000733811 0.000726145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.66 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.132160e-01
Photon flux (15-150 keV) in 26.06 sec: 1.07578 ( -0.0915621 0.0917236 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98646e-06 ( -1.8787e-07 1.89509e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.040 sec. to 11.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66315 ( -0.160762 0.152928 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 8.21326E-03 ( -0.00475991 0.0077045 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.66 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 56 degrees of freedom
# Null hypothesis probability = 2.809358e-01
Photon flux (15-150 keV) in 26.06 sec: 1.07539 ( -0.093877 0.09163 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.98589e-06 ( -2.03529e-07 1.8887e-07 ) ergs/cm2
Band function
Time interval is from -15.040 sec. to 11.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20932 ( 1.20531 1.20531 )
beta : -1.69578 ( 1.6953 0.180064 )
Epeak [keV] : 52.9950 ( -55.557 -55.557 )
Norm@50keV : 1.65563E-02 ( -0.00873198 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.55 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 55 degrees of freedom
# Null hypothesis probability = 2.531044e-01
Photon flux (15-150 keV) in 26.06 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] : 13.0279 (-1.43548 1.6507)
R^2/D10^2 : 0.190669 (-0.0669404 0.101249)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.69 using 59 PHA bins.
# Reduced chi-squared = 1.8366 for 57 degrees of freedom
# Null hypothesis probability = 1.215217e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.789e-07 3.043e-08
25- 50 6.174e-07 6.150e-08
50-150 6.634e-07 1.216e-07
15-150 1.460e-06 1.644e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 153.557 (-50.6916 -153.407)
Norm : 4.41344 (-0.419953 0.501209)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.948e-07 3.899e-08
25- 50 5.483e-07 1.179e-07
50-150 1.093e-06 5.142e-07
15-150 1.936e-06 6.162e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.94495 (-1.60832 1.76933)
R1^2/D10^2 : 1.34853 (-0.71994 1.44108)
kT2 [keV] : 28.7817 (-7.70859 18.2925)
R2^2/D10^2 : 8.71616E-03 (-0.00682764 0.0183221)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.003e-07 1.046e-07
25- 50 5.472e-07 1.463e-07
50-150 1.146e-06 5.719e-07
15-150 1.993e-06 7.097e-07
Peak spectrum fit
Power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53989 ( -0.355497 0.370291 )
Norm@50keV : 1.63716E-02 ( -0.00388817 0.00384644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.15 using 59 PHA bins.
# Reduced chi-squared = 1.511 for 57 degrees of freedom
# Null hypothesis probability = 7.594212e-03
Photon flux (15-150 keV) in 1 sec: 2.06655 ( -0.479172 0.480366 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54347e-07 ( -3.87818e-08 3.9455e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.503457 ( -2.66737 1.13001 )
Epeak [keV] : 70.1390 ( -41.9305 -70.1397 )
Norm@50keV : 5.68726E-02 ( -0.0568678 1.94828 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.47 using 59 PHA bins.
# Reduced chi-squared = 1.508 for 56 degrees of freedom
# Null hypothesis probability = 8.303288e-03
Photon flux (15-150 keV) in 1 sec: 2.01344 ( -0.48547 0.48609 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45389e-07 ( -4.4373e-08 4.2591e-08 ) ergs/cm2
Band function
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.53184 ( -10.0038 -3.59592 )
beta : -2.31161 ( -1.4436 0.789825 )
Epeak [keV] : 40.2983 ( -14.3041 94.0583 )
Norm@50keV : 17.7826 ( -20.1189 57.2478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.63 using 59 PHA bins.
# Reduced chi-squared = 1.502 for 55 degrees of freedom
# Null hypothesis probability = 9.366071e-03
Photon flux (15-150 keV) in 1 sec: 2.03757 ( 4.96243 -0.5175 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45455e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.8311 (-2.92946 4.68352)
R^2/D10^2 : 0.423390 (-0.286042 0.659377)
(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 1.478e-08 7.127e-09
25- 50 5.020e-08 1.874e-08
50-150 5.185e-08 2.771e-08
15-150 1.168e-07 5.412e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 182.669 (-113.734 -188.662)
Norm : 8.57198 (-1.96034 2.45465)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.158e-08 1.279e-08
25- 50 4.108e-08 2.332e-08
50-150 8.743e-08 5.125e-08
15-150 1.501e-07 8.805e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.04422 (-3.45587 4.34985)
R1^2/D10^2 : 1.05668 (-0.531491 3.20767)
kT2 [keV] : 29.9302 (-15.1034 -30.1256)
R2^2/D10^2 : 1.24665E-02 (-0.0127405 0.179451)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.862e-08 1.142e-08
25- 50 4.692e-08 2.675e-08
50-150 8.229e-08 5.510e-08
15-150 1.478e-07 8.115e-08
Plot creation:
Sun Mar 6 19:52:17 EST 2022