batgrbproduct analysis for trigger=1299967
batgrbproduct Analysis for Trigger=1299967
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): Wed Apr 2 22:14:14 EDT 2025
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1299967/batgroup_hand_proc
======================================================================
Trigger: 01299967 Segment: 000
BAT Trigger Time: 765088696 [s; MET]
Trigger Stop: 765088760 [s; MET]
UTC: 2025-03-31T04:37:40.659100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 80.9933813960858 Dec: 33.0285181956948 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.76
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.76
Flight Position: [ source = BAT ]
RA: 80.9933813960858 Dec: 33.0285181956948 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 80.9625554085654 Dec: 33.067618777963 [deg; J2000]
{ 05h 23m 51.0s , +33d 04' 03.4" }
+/- 2.0215451193458 [arcmin] (estimated 90% radius based on SNR)
+/- 0.818398764266459 [arcmin] (formal 1-sigma fit error)
SNR: 11.1282725314239
Angular difference between Flight and Ground position is 2.812008 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 70.0999999046326 +/- 11.7037917883658
Measured from: -8.94799995422363
to: 61.1519999504089 [s; relative to TRIGTIME]
T50: 28.567999958992 +/- 8.61611735633901
Measured from: 6.01199996471405
to: 34.5799999237061 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -3.19200003147125
to: -2.19200003147125 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.5880000591278
to: 66.6679999828339 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.480670 0.496151 0.230079 0.076546
0.054605 0.056321 0.046933 0.039371 [error]
Peak 0.016196 0.015308 0.009755 0.013470
0.006404 0.006578 0.005337 0.004493 [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 1.31e-07 1.91e-07 2.07e-07 4.20e-07 6.59e-07 9.50e-07 erg/cm2
Error 2.28e-08 2.41e-08 4.37e-08 1.74e-07 1.02e-07 2.22e-07 erg/cm2
Peak flux Power-law 9.23e-02 1.02e-01 8.11e-02 1.06e-01 3.15e-01 3.82e-01 ph/cm2/s
Error 8.08e-02 7.65e-02 6.20e-02 1.63e-01 2.29e-01 1.76e-01 ph/cm2/s
Fluence Cutoff-PL 1.25e-07 2.14e-07 1.92e-07 9.35e-08 5.94e-07 6.24e-07 erg/cm2
Error 2.50e-08 3.71e-08 5.82e-08 2.22e-07 1.22e-07 2.96e-07 erg/cm2
Peak flux Cutoff-PL 9.19e-02 1.02e-01 8.12e-02 1.06e-01 3.15e-01 3.82e-01 ph/cm2/s
Error 6.80e-02 7.66e-02 3.47e-02 1.62e-01 1.43e-01 1.81e-01 ph/cm2/s
Fluence Band 1.22e-07 2.19e-07 1.84e-07 2.31e-07 6.15e-07 7.57e-07 erg/cm2
Error 3.04e-08 -------- -------- -------- -------- -------- 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 1.883 0.226 - - 9.05e-04 1.40e-04 52.730 57
CPL 1.008 1.267 44.8 -13.9 3.03e-03 1.25e-02 50.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.337 1.027 - - 2.62e-03 1.18e-03 59.020 57
CPL 2.377 3.744 128.3 0.0 7.86e-04 0.00e+00 58.400 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: 57.472000 sec.
T50 in the 50-300 keV band: 25.088000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 79.256 -12.588 66.668
T90 70.100 -8.948 61.152
T50 28.568 6.012 34.580
Peak 1.000 -3.192 -2.192
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
80.9626 +33.0676 0.0172 13.1 159.6 1.3544 11.1 TRIG_01299967
------------------------------------------
Foreground time interval of the image:
-12.588 66.668 (delta_t = 79.256 [sec])
Background time interval of the image:
-239.000 -12.588 (delta_t = 226.412 [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 -12.588 sec. to 66.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88284 ( -0.220071 0.232184 )
Norm@50keV : 9.04940E-04 ( -0.000141931 0.000138617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.73 using 59 PHA bins.
# Reduced chi-squared = 0.9252 for 57 degrees of freedom
# Null hypothesis probability = 6.357441e-01
Photon flux (15-150 keV) in 79.26 sec: 0.128933 ( -0.016129 0.0161292 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.5937e-07 ( -1.00549e-07 1.03304e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.588 sec. to 66.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00849 ( -1.48955 1.04479 )
Epeak [keV] : 44.8279 ( -16.9573 -44.7934 )
Norm@50keV : 3.03280E-03 ( -0.00304917 0.0219515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.81 using 59 PHA bins.
# Reduced chi-squared = 0.9074 for 56 degrees of freedom
# Null hypothesis probability = 6.709004e-01
Photon flux (15-150 keV) in 79.26 sec: 0.125313 ( -0.016706 0.016731 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93657e-07 ( -1.14903e-07 1.29497e-07 ) ergs/cm2
Band function
Time interval is from -12.588 sec. to 66.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91946 ( -14.3577 -4.91946 )
beta : -2.08320 ( -0.38739 0.281109 )
Epeak [keV] : 23.4754 ( -7.99466 4.34572 )
Norm@50keV : 182.522 ( -22.6054 1367.53 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.30 using 59 PHA bins.
# Reduced chi-squared = 0.8964 for 55 degrees of freedom
# Null hypothesis probability = 6.911962e-01
Photon flux (15-150 keV) in 79.26 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.14538e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.84750 (-1.26837 1.47637)
R^2/D10^2 : 6.59792E-02 (-0.0273094 0.0454986)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.47 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.577023e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.027e-07 2.308e-08
25- 50 2.499e-07 4.494e-08
50-150 1.247e-07 4.233e-08
15-150 4.773e-07 8.802e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.6017 (-24.9968 49.7091)
Norm : 0.624984 (-0.110439 0.136151)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.279e-07 2.172e-08
25- 50 2.069e-07 3.004e-08
50-150 2.783e-07 1.348e-07
15-150 6.130e-07 1.385e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.20606 (-3.88154 1.6566)
R1^2/D10^2 : 0.115708 (-0.0558766 0.0818685)
kT2 [keV] : 44.4089 (-35.7731 -48.3357)
R2^2/D10^2 : 1.71087E-04 (-0.000131143 0.0209082)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-07 3.823e-08
25- 50 2.304e-07 7.811e-08
50-150 3.017e-07 1.641e-07
15-150 6.490e-07 2.420e-07
Peak spectrum fit
Power-law model
Time interval is from -3.192 sec. to -2.192 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33702 ( -1.06244 0.990949 )
Norm@50keV : 2.62305E-03 ( -0.00121554 0.00114955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.02 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.015521e-01
Photon flux (15-150 keV) in 1 sec: 0.315146 ( -0.315146 0.143771 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56984e-08 ( -1.27053e-08 1.29635e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.192 sec. to -2.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.37651 ( -2.78096 4.70604 )
Epeak [keV] : 128.277 ( )
Norm@50keV : 7.86169E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 56 degrees of freedom
# Null hypothesis probability = 3.872185e-01
Photon flux (15-150 keV) in 1 sec: 0.314869 ( -0.143011 0.143922 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.54296e-08 ( -1.24429e-08 1.28962e-08 ) ergs/cm2
Band function
Time interval is from -3.192 sec. to -2.192 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09612 ( 1.09684 1.09684 )
beta : -1.33250 ( 1.33598 1.06189 )
Epeak [keV] : 32.0244 ( -32.3355 -32.3355 )
Norm@50keV : 5.07097E-03 ( -0.00508139 0.0780095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.02 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 55 degrees of freedom
# Null hypothesis probability = 3.308379e-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] : 29.0112 (-29.1155 99.208)
R^2/D10^2 : 4.10646E-03 (-0.00405324 1.03968)
(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 3.267e-09 2.180e-09
25- 50 6.338e-09 4.272e-09
50-150 2.026e-09 1.930e-09
15-150 1.163e-08 7.905e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.362 -199.362)
Norm : 1.29388 (-0.576632 0.576619)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.222e-09 2.209e-09
25- 50 6.198e-09 3.959e-09
50-150 1.359e-08 8.955e-09
15-150 2.301e-08 1.537e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.59469 (-3.49989 5.49148)
R1^2/D10^2 : 0.986943 (-0.925507 126.597)
kT2 [keV] : 46.8052 (-46.9862 -46.9864)
R2^2/D10^2 : 9.82294E-04 (-0.000941269 0.00276273)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.933e-09 2.331e-09
25- 50 4.903e-09 2.913e-09
50-150 2.032e-08 1.237e-08
15-150 2.915e-08 1.527e-08
Plot creation:
Wed Apr 2 22:20:36 EDT 2025