batgrbproduct analysis for trigger=872470
batgrbproduct Analysis for Trigger=872470
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 v2.46
Process Start Time (local time): Mon Nov 19 13:13:43 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger872470/GCN5_download_cron
======================================================================
Trigger: 00872470 Segment: 000
BAT Trigger Time: 564255236.352 [s; MET]
Trigger Stop: 564255263.232 [s; MET]
UTC: 2018-11-18T17:33:34.410560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.270012949475 Dec: -15.6652366429685 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.55
Image Trigger?: NO
Rate S/N Ratio: 38.742741255621 [ if not an image trigger ]
Image S/N Ratio: 6.55
Flight Position: [ source = BAT ]
RA: 299.270012949475 Dec: -15.6652366429685 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.270547627298 Dec: -15.7216108912909 [deg; J2000]
{ 19h 57m 04.9s , -15d 43' 17.8" }
+/- 8.62510465297001 [arcmin] (estimated 90% radius based on SNR)
+/- 7.13278290505667 [arcmin] (formal 1-sigma fit error)
SNR: 1.40059358355184
Angular difference between Flight and Ground position is 3.382596 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
T50: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 26.8799999952316 second)
Measured from: 5.96046447753906e-08
to: 26.8800000548363 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.119216 -0.060262 0.105761 0.209050
0.054591 0.061655 0.053231 0.061082 [error]
Peak -0.119216 -0.060262 0.105761 0.209050
0.054591 0.061655 0.053231 0.061082 [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 0.00e+005.92e-10 0.00e+006.51e-09 0.00e+006.43e-08 0.00e+004.13e-06 0.00e+002.65e-07 0.00e+004.54e-064.31e-06 erg/cm2
Error 7.63e-09 1.00e-08 5.53e-08 3.55e-06 1.49e-07 3.59e-06 erg/cm2
Peak flux Power-law 0.00e+006.63e-04 0.00e+003.85e-03 0.00e+001.93e-02 0.00e+003.91e-01 0.00e+005.94e-02 0.00e+003.92e-01 ph/cm2/s
Error 9.04e-03 6.13e-03 1.67e-02 3.18e-01 3.54e-02 2.58e-01 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 7.57e-09 8.84e-09 6.15e-08 -------- 2.23e-07 3.07e-05 erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 8.95e-03 5.38e-03 1.69e-02 8.26e-01 4.69e-02 5.40e-01 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 -1.256 0.894 - - 2.23e-04 2.73e-04 47.380 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 57.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.256 0.894 - - 2.23e-04 2.73e-04 47.380 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 57.510 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 26.880 0.000 26.880
T90 26.880 0.000 26.880
T50 26.880 0.000 26.880
Peak 26.880 0.000 26.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.2705 -15.7216 0.1365 14.1 107.7 0.2441 1.4 TRIG_00872470
------------------------------------------
Foreground time interval of the image:
0.000 26.880 (delta_t = 26.880 [sec])
Background time interval of the image:
-239.352 -44.352 (delta_t = 195.000 [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 0.000 sec. to 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.25622 ( -0.695944 1.09283 )
Norm@50keV : 2.23335E-04 ( -0.00022175 0.000323453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.38 using 59 PHA bins.
# Reduced chi-squared = 0.8312 for 57 degrees of freedom
# Null hypothesis probability = 8.144422e-01
Photon flux (15-150 keV) in 26.88 sec: 0.0 5.93664E-02 ( -0.0351281 0.0356907 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( -1.53176e-07 1.43971e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 56 degrees of freedom
# Null hypothesis probability = 4.192206e-01
Photon flux (15-150 keV) in 26.88 sec: 0.0 5.66694E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.54744 ( 1.54744 3.46078 )
Epeak [keV] : 282.294 ( )
Norm@50keV : 1.98375E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.82 using 59 PHA bins.
# Reduced chi-squared = 0.8513 for 55 degrees of freedom
# Null hypothesis probability = 7.756322e-01
Photon flux (15-150 keV) in 26.88 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.67225E-05 (-1.95527e-05 -3.67226e-05)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.96 using 59 PHA bins.
# Reduced chi-squared = 0.8414 for 57 degrees of freedom
# Null hypothesis probability = 7.974993e-01
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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.563518e-01
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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 (-199.363 -199.363)
R1^2/D10^2 : 3.72625E-05 (-1.96348e-05 0.000184601)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.96 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Reduced chi-squared = 0.8721 for 55 degrees of freedom
# Null hypothesis probability = 3.825780e-01
# Null hypothesis probability = 7.381268e-01
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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.25622 ( -0.695944 1.09283 )
Norm@50keV : 2.23335E-04 ( -0.00022175 0.000323453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.38 using 59 PHA bins.
# Reduced chi-squared = 0.8312 for 57 degrees of freedom
# Null hypothesis probability = 8.144422e-01
Photon flux (15-150 keV) in 26.88 sec: 0.0 5.93664E-02 ( -0.0351281 0.0356907 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( -1.53176e-07 1.43971e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 56 degrees of freedom
# Null hypothesis probability = 4.192206e-01
Photon flux (15-150 keV) in 26.88 sec: 0.0 5.66694E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.54744 ( 1.54744 3.46078 )
Epeak [keV] : 282.294 ( )
Norm@50keV : 1.98375E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.82 using 59 PHA bins.
# Reduced chi-squared = 0.8513 for 55 degrees of freedom
# Null hypothesis probability = 7.756322e-01
Photon flux (15-150 keV) in 26.88 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.67225E-05 (-1.95527e-05 -3.67226e-05)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.96 using 59 PHA bins.
# Reduced chi-squared = 0.8414 for 57 degrees of freedom
# Null hypothesis probability = 7.974993e-01
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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.563518e-01
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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 (-147.729 -199.363)
R1^2/D10^2 : 3.72625E-05 (-1.96348e-05 0.000184601)
kT2 [keV] : 10.0000 (-10 -10)
R2^2/D10^2 : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.96 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Reduced chi-squared = 0.8721 for 55 degrees of freedom
# Null hypothesis probability = 3.825780e-01
# Null hypothesis probability = 7.381268e-01
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:
Mon Nov 19 13:32:27 EST 2018