batgrbproduct analysis for trigger=1202522
batgrbproduct Analysis for Trigger=1202522
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): Sat Dec 16 04:48:50 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1202522/GCN5_download_cron
======================================================================
Trigger: 01202522 Segment: 000
BAT Trigger Time: 724326477.824 [s; MET]
Trigger Stop: 724326479.872 [s; MET]
UTC: 2023-12-15T09:47:25.273060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 9.75000608289667 Dec: 57.6422967295133 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.55
Image Trigger?: NO
Rate S/N Ratio: 98.4428768372806 [ if not an image trigger ]
Image S/N Ratio: 9.55
Flight Position: [ source = BAT ]
RA: 9.75000608289667 Dec: 57.6422967295133 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 9.72967637773588 Dec: 57.6335461153214 [deg; J2000]
{ 00h 38m 55.1s , +57d 38' 00.8" }
+/- 1.30259585499056 [arcmin] (estimated 90% radius based on SNR)
+/- 0.575212654611185 [arcmin] (formal 1-sigma fit error)
SNR: 20.8499267939929
Angular difference between Flight and Ground position is 0.837828 arcmin
Partial Coding Fraction: 0.06542969 [ including projection effects ]
Duration
T90: 20.7519999742508 +/- 3.68521366002044
Measured from: -5.80799984931946
to: 14.9440001249313 [s; relative to TRIGTIME]
T50: 6.72000002861023 +/- 1.35093447738546
Measured from: -1.82399988174438
to: 4.89600014686584 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.179999947547913
to: 1.17999994754791 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.03999996185303
to: 19.7920000553131 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.980161 3.693753 4.758000 2.521089
0.181595 0.210333 0.207037 0.185642 [error]
Peak 0.089852 0.366463 0.564878 0.243361
0.038596 0.050352 0.056057 0.046973 [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 7.65e-07 1.91e-06 3.79e-06 1.87e-05 1.02e-05 2.52e-05 erg/cm2
Error 9.02e-08 1.35e-07 1.94e-07 2.24e-06 5.18e-07 2.28e-06 erg/cm2
Peak flux Power-law 1.92e+00 2.78e+00 3.00e+00 6.03e+00 9.57e+00 1.37e+01 ph/cm2/s
Error 5.64e-01 5.16e-01 4.03e-01 1.65e+00 1.38e+00 1.93e+00 ph/cm2/s
Fluence Cutoff-PL 7.62e-07 1.92e-06 3.82e-06 1.72e-05 1.02e-05 2.37e-05 erg/cm2
Error 9.42e-08 1.39e-07 2.39e-07 3.96e-06 5.20e-07 3.54e-06 erg/cm2
Peak flux Cutoff-PL 1.30e+00 2.81e+00 3.49e+00 2.84e+00 9.23e+00 1.04e+01 ph/cm2/s
Error 6.83e-01 5.93e-01 5.83e-01 1.93e+00 1.39e+00 2.39e+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 1.009 0.091 - - 3.54e-02 1.94e-03 54.070 57
CPL 0.939 0.297 939.5 0.0 3.77e-02 8.66e-03 54.030 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.892 0.222 - - 8.34e-02 1.20e-02 69.650 57
CPL -0.271 1.144 124.7 174.3 2.41e-01 3.04e-01 65.620 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: 23.296000 sec.
T50 in the 50-300 keV band: 5.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.832 -7.040 19.792
T90 20.752 -5.808 14.944
T50 6.720 -1.824 4.896
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
9.7297 +57.6335 0.0092 57.2 -174.2 14.0301 20.8 TRIG_01202522
------------------------------------------
Foreground time interval of the image:
-7.040 19.792 (delta_t = 26.832 [sec])
Background time interval of the image:
-239.824 -57.681 (delta_t = 182.143 [sec])
-49.824 -48.394 (delta_t = 1.430 [sec])
-46.824 -7.040 (delta_t = 39.784 [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 -7.040 sec. to 19.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00894 ( -0.0918406 0.0899172 )
Norm@50keV : 3.53719E-02 ( -0.00194443 0.00192761 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.07 using 59 PHA bins.
# Reduced chi-squared = 0.9486 for 57 degrees of freedom
# Null hypothesis probability = 5.856250e-01
Photon flux (15-150 keV) in 26.83 sec: 4.07436 ( -0.231806 0.232713 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02303e-05 ( -5.185e-07 5.18052e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.040 sec. to 19.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.938879 ( -0.365372 0.228348 )
Epeak [keV] : 939.484 ( -999.809 -999.809 )
Norm@50keV : 3.77333E-02 ( -0.00364329 0.0136719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.03 using 59 PHA bins.
# Reduced chi-squared = 0.9648 for 56 degrees of freedom
# Null hypothesis probability = 5.498642e-01
Photon flux (15-150 keV) in 26.83 sec: 4.06796 ( -0.24307 0.23563 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02281e-05 ( -5.17631e-07 5.21656e-07 ) ergs/cm2
Band function
Time interval is from -7.040 sec. to 19.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.99997 -4.99997 )
beta : -1.02980 ( -0.0952597 0.0950161 )
Epeak [keV] : 25.7720 ( -25.772 5.39783 )
Norm@50keV : 1986.73 ( -98.8838 6.51233e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9593 for 55 degrees of freedom
# Null hypothesis probability = 5.606453e-01
Photon flux (15-150 keV) in 26.83 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] : 25.2985 ( )
R^2/D10^2 : 9.40190E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 123.68 using 59 PHA bins.
# Reduced chi-squared = 2.1699 for 57 degrees of freedom
# Null hypothesis probability = 7.772336e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.787e-07 3.165e-08
25- 50 1.591e-06 1.472e-07
50-150 7.535e-06 5.138e-07
15-150 9.405e-06 5.420e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 17.9362 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-06 7.861e-08
25- 50 2.305e-06 1.340e-07
50-150 5.056e-06 3.099e-07
15-150 8.559e-06 5.406e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.51213 (-1.97361 2.38451)
R1^2/D10^2 : 1.16164 (-0.553617 1.27381)
kT2 [keV] : 41.6274 (-7.39494 15.4145)
R2^2/D10^2 : 1.75411E-02 (-0.0103637 0.00765061)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.657e-07 1.676e-07
25- 50 2.008e-06 4.361e-07
50-150 7.662e-06 1.755e-06
15-150 1.034e-05 2.463e-06
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: 0.892247 ( -0.227043 0.216175 )
Norm@50keV : 8.33901E-02 ( -0.0120567 0.0118774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.65 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 57 degrees of freedom
# Null hypothesis probability = 1.213611e-01
Photon flux (15-150 keV) in 1 sec: 9.57090 ( -1.36999 1.38036 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.38693e-07 ( -1.27632e-07 1.27802e-07 ) 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: -0.270753 ( -1.28675 1.00099 )
Epeak [keV] : 124.723 ( -34.8286 313.742 )
Norm@50keV : 0.241120 ( -0.142592 0.466196 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.62 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 56 degrees of freedom
# Null hypothesis probability = 1.778814e-01
Photon flux (15-150 keV) in 1 sec: 9.23301 ( -1.38044 1.40009 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.28567e-07 ( -1.3354e-07 1.32103e-07 ) ergs/cm2
Band function
Time interval is from 0.180 sec. to 1.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.272524 ( -1.0235 0.871453 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 125.746 ( -26.4913 141.967 )
Norm@50keV : 0.238965 ( -0.107814 0.168381 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.62 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.546904e-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] : 25.0894 (-3.70085 4.70761)
R^2/D10^2 : 0.247133 (-0.10264 0.161653)
(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 2.697e-08 7.970e-09
25- 50 1.533e-07 3.310e-08
50-150 7.152e-07 1.532e-07
15-150 8.955e-07 1.676e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-25.4199 -200)
Norm : 40.0274 (-5.77673 5.77673)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.971e-08 5.765e-08
25- 50 1.918e-07 1.074e-07
50-150 4.207e-07 2.365e-07
15-150 7.122e-07 4.003e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.5703 (-10.8257 -10.8257)
R1^2/D10^2 : 1.11841 (-1.10369 -1.10369)
kT2 [keV] : 31.3958 (-31.5935 -31.5935)
R2^2/D10^2 : 0.105753 (-0.104034 0.191277)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.172e-08 2.515e-08
25- 50 1.690e-07 9.165e-08
50-150 7.226e-07 3.837e-07
15-150 9.334e-07 4.872e-07
Plot creation:
Sat Dec 16 04:54:42 EST 2023