batgrbproduct analysis for trigger=1236151
batgrbproduct Analysis for Trigger=1236151
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): Tue Jun 11 06:24:18 EDT 2024
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1236151/GCN5_download_cron
======================================================================
Trigger: 01236151 Segment: 000
BAT Trigger Time: 739697830.016 [s; MET]
Trigger Stop: 739697832.064 [s; MET]
UTC: 2024-06-10T07:36:36.411820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 117.175538399408 Dec: -67.8040245620475 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.59
Image Trigger?: NO
Rate S/N Ratio: 7.54983443527075 [ if not an image trigger ]
Image S/N Ratio: 6.59
Flight Position: [ source = BAT ]
RA: 117.175538399408 Dec: -67.8040245620475 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 117.083452445287 Dec: -67.7765321230064 [deg; J2000]
{ 07h 48m 20.0s , -67d 46' 35.5" }
+/- 2.73023154738839 [arcmin] (estimated 90% radius based on SNR)
+/- 1.60791507475584 [arcmin] (formal 1-sigma fit error)
SNR: 7.24396369237364
Angular difference between Flight and Ground position is 2.661357 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 8.06399989128113 +/- 2.52455459885648
Measured from: -1.19199991226196
to: 6.87199997901917 [s; relative to TRIGTIME]
T50: 3.90399980545044 +/- 1.90930368307382
Measured from: 1.30400013923645
to: 5.20799994468689 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.899999976158142
to: 1.89999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.44800007343292
to: 7.89599990844727 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.227955 0.020520 -0.010652 0.010030
0.020016 0.018916 0.015776 0.013745 [error]
Peak 0.038258 0.005534 -0.002813 0.005530
0.006630 0.006247 0.005224 0.004536 [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 5.87e-08 1.36e-08 1.61e-09 2.13e-10 7.40e-08 7.41e-08 erg/cm2
Error 1.07e-08 7.02e-09 2.15e-09 5.15e-10 1.67e-08 1.68e-08 erg/cm2
Peak flux Power-law 2.72e-01 5.53e-02 5.59e-03 6.20e-04 3.33e-01 3.34e-01 ph/cm2/s
Error 9.39e-02 5.35e-02 1.12e-02 2.97e-03 1.30e-01 1.31e-01 ph/cm2/s
Fluence Cutoff-PL 6.65e-08 4.10e-09 4.70e-14 1.73e-26 7.06e-08 7.06e-08 erg/cm2
Error 1.21e-08 5.98e-09 2.36e-10 0.00e+00 1.32e-08 1.32e-08 erg/cm2
Peak flux Cutoff-PL 3.41e-01 1.74e-02 1.12e-07 1.12e-20 3.58e-01 3.58e-01 ph/cm2/s
Error 1.09e-01 2.43e-02 9.28e-05 0.00e+00 1.18e-01 1.18e-01 ph/cm2/s
Fluence Band -------- 1.33e-08 -------- 1.04e-11 7.03e-08 7.00e-08 erg/cm2
Error -------- 7.08e-09 -------- -------- -------- -------- 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 5.073 0.856 - - 1.51e-04 1.66e-04 58.970 57
CPL 1.000 0.000 50.0 0.0 2.89e-03 0.00e+00 121.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.297 1.413 - - 4.15e-04 6.34e-04 57.480 57
CPL 1.000 0.000 50.0 0.0 5.13e-03 0.00e+00 72.830 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 9.344 -1.448 7.896
T90 8.064 -1.192 6.872
T50 3.904 1.304 5.208
Peak 1.000 0.900 1.900
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
117.0835 -67.7765 0.0265 11.0 60.5 0.2649 7.2 TRIG_01236151
------------------------------------------
Foreground time interval of the image:
-1.448 7.896 (delta_t = 9.344 [sec])
Background time interval of the image:
-239.016 -55.626 (delta_t = 183.390 [sec])
-55.016 -1.448 (delta_t = 53.568 [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 -1.448 sec. to 7.896 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.07272 ( -0.780194 0.932159 )
Norm@50keV : 1.50518E-04 ( -0.000150441 0.000181505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.97 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.034820e-01
Photon flux (15-150 keV) in 9.344 sec: 0.248979 ( -0.0478172 0.0481361 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.40367e-08 ( -1.61257e-08 1.72511e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.448 sec. to 7.896 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.88773E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 121.21 using 59 PHA bins.
# Reduced chi-squared = 2.1645 for 56 degrees of freedom
# Null hypothesis probability = 1.039878e-06
Photon flux (15-150 keV) in 9.344 sec: 0.247290 0.255800 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.05933e-08 ( -1.30219e-08 1.33431e-08 ) ergs/cm2
Band function
Time interval is from -1.448 sec. to 7.896 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.62403 ( -8.53842 5.03914 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 12.5854 ( -2.84469 1.67144 )
Norm@50keV : 4027.67 ( -709.852 62389.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.592996e-01
Photon flux (15-150 keV) in 9.344 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.03443e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.75377 (-0.425584 0.505784)
R^2/D10^2 : 63.8938 (-63.896 140.434)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 57 degrees of freedom
# Null hypothesis probability = 5.231996e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.426e-08 3.549e-08
25- 50 6.876e-09 4.392e-09
50-150 5.354e-12 5.985e-12
15-150 7.114e-08 3.905e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.36749 (-1.27653 1.83403)
Norm : 45.3694 (-26.4661 74.866)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.226e-08 3.248e-08
25- 50 9.201e-09 5.666e-09
50-150 6.740e-11 7.788e-11
15-150 7.153e-08 3.993e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.75054 (-2.75189 -2.75189)
R1^2/D10^2 : 29.5675 (-29.7212 -29.7212)
kT2 [keV] : 2.76032 (-2.75419 -2.75419)
R2^2/D10^2 : 34.0100 (-34.1649 -34.1649)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.426e-08 1.241e+02
25- 50 6.895e-09 1.052e+03
50-150 5.405e-12 2.851e+04
15-150 7.116e-08 2.611e+04
Peak spectrum fit
Power-law model
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29716 ( -1.15645 1.66961 )
Norm@50keV : 4.15497E-04 ( -0.000412578 0.000855627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.573755e-01
Photon flux (15-150 keV) in 1 sec: 0.333211 ( -0.127943 0.132969 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1428e-08 ( -5.02325e-09 6.34752e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.13030E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.83 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 56 degrees of freedom
# Null hypothesis probability = 6.482826e-02
Photon flux (15-150 keV) in 1 sec: 0.358313 0.359580 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15537e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.900 sec. to 1.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.20155 ( 1.66191 1.66191 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 13.3877 ( -3.10762 4.19262 )
Norm@50keV : 1195.98 ( -389.271 44285.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.89 using 59 PHA bins.
# Reduced chi-squared = 0.9980 for 55 degrees of freedom
# Null hypothesis probability = 4.787994e-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] : 3.03843 (-0.765497 1.0538)
R^2/D10^2 : 44.8991 (-45.2294 242.02)
(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 9.080e-09 5.160e-09
25- 50 1.383e-09 8.865e-10
50-150 2.469e-12 2.895e-12
15-150 1.047e-08 6.095e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.60329 (-2.6981 5.96875)
Norm : 31.5678 (-31.4315 128.007)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.565e-09 4.992e-09
25- 50 1.914e-09 1.401e-09
50-150 3.401e-11 4.770e-11
15-150 1.051e-08 6.270e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.03433 (-0.767225 1.05206)
R1^2/D10^2 : 45.2782 (-45.2783 242.941)
kT2 [keV] : 0.149242 (-0.149242 -0.149242)
R2^2/D10^2 : 1.36221E-02 (-0.0136221 -0.0136221)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Tue Jun 11 06:27:46 EDT 2024