batgrbproduct Analysis for Trigger=519043
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Apr 1 19:57:30 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger519043/GCN5_download_cron
======================================================================
Trigger: 00519043 Segment: 000
BAT Trigger Time: 354950664 [s; MET]
Trigger Stop: 354950728 [s; MET]
UTC: 2012-04-01T05:24:15.946360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 58.0683562384394 Dec: -17.6710926873154 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.99
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.99
Flight Position: [ source = BAT ]
RA: 58.0683562384394 Dec: -17.6710926873154 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 58.0561098483055 Dec: -17.6587140493346 [deg; J2000]
{ 03h 52m 13.5s , -17d 39' 31.4" }
+/- 2.47226629695559 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06299483942582 [arcmin] (formal 1-sigma fit error)
SNR: 8.34744832851257
Angular difference between Flight and Ground position is 1.020697 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 130.283999919891 +/- 24.2015222583918
Measured from: -87.1719998717308
to: 43.1120000481606 [s; relative to TRIGTIME]
T50: 61.1119999885559 +/- 16.2410823350224
Measured from: -53.475999891758
to: 7.63600009679794 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -92.5199999809265
to: -91.5199999809265 [s; relative to TRIGTIME]
Total Fluence
Measured from: -92.972000002861
to: 52.716000020504 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.482947 0.690764 0.367765 0.064702
0.070157 0.071998 0.062907 0.053820 [error]
Peak -0.004250 0.030008 0.013489 0.014090
0.012218 0.012247 0.011565 0.009282 [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 1.45e-07 2.41e-07 3.04e-07 7.67e-07 9.03e-07 1.46e-06 erg/cm2
Error 2.82e-08 3.09e-08 5.91e-08 3.06e-07 1.40e-07 3.62e-07 erg/cm2
Peak flux Power-law 3.41e-04 3.22e-03 2.74e-02 1.46e+00 1.09e-01 8.84e-01 ph/cm2/s
Error 5.55e-02 7.56e-02 9.51e-02 1.37e+00 2.70e-01 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 1.36e-07 2.58e-07 3.05e-07 3.09e-07 1.01e-06 0.00e+00 erg/cm2
Error 3.21e-08 4.20e-08 6.53e-08 5.08e-07 5.12e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.55e-04 2.68e-03 2.54e-02 3.59e+00 1.08e-01 7.66e-01 ph/cm2/s
Error 5.32e-02 7.42e-02 9.46e-02 2.85e+00 2.68e-01 0.00e+00 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.662 0.229 - - 6.67e-04 9.60e-05 62.350 57
CPL 1.094 0.941 71.9 -14.0 1.37e-03 2.45e-03 61.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.087 0.000 - - 2.26e-04 2.33e-03 62.990 57
CPL -0.165 0.721 10000.0 0.0 2.23e-03 2.57e-03 63.880 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 145.688 -92.972 52.716
T90 130.284 -87.172 43.112
T50 61.112 -53.476 7.636
Peak 1.000 -92.520 -91.520
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
58.0561 -17.6587 0.0230 1.8 141.2 0.6658 8.3 TRIG_00519043
------------------------------------------
Foreground time interval of the image:
-15.599 52.716 (delta_t = 68.315 [sec])
Background time interval of the image:
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 -92.972 sec. to 52.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66227 ( -0.224181 0.23301 )
Norm@50keV : 6.67101E-04 ( -9.69854e-05 9.50589e-05 )
------------------------------------------------------------
# Chi-Squared = 62.35 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 57 degrees of freedom
# Null hypothesis probability = 2.916737e-01
Photon flux (15-150 keV) in 145.7 sec: 8.74627E-02 ( -0.011233 0.011236 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02887e-07 ( -1.38015e-07 1.4109e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -92.972 sec. to 52.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09434 ( -1.14467 0.737918 )
Epeak [keV] : 71.9253 ( -43.9454 -71.9255 )
Norm@50keV : 1.36718E-03 ( -0.000437495 0.0044687 )
------------------------------------------------------------
# Chi-Squared = 61.24 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 56 degrees of freedom
# Null hypothesis probability = 2.935019e-01
Photon flux (15-150 keV) in 145.7 sec: 8.54870E-02 ( -0.0115988 0.0116619 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00746e-06 ( -2.86771e-07 7.37127e-07 ) ergs/cm2
Band function
Time interval is from -92.972 sec. to 52.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13238 ( 1.13259 0.736039 )
beta : -9.36766 ( 9.99571 19.9957 )
Epeak [keV] : 74.6318 ( -74.5675 -74.5675 )
Norm@50keV : 1.29723E-03 ( -0.000586685 0.00115166 )
------------------------------------------------------------
# Chi-Squared = 61.25 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Null hypothesis probability = 2.618836e-01
Photon flux (15-150 keV) in 145.7 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] : 11.9824 (-1.73525 2.13391)
R^2/D10^2 : 2.16278E-02 (-0.00970778 0.0165991)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 71.14 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 57 degrees of freedom
# Null hypothesis probability = 9.854624e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.568e-08 2.057e-08
25- 50 3.006e-07 5.704e-08
50-150 2.593e-07 7.926e-08
15-150 6.555e-07 1.097e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 132.950 (-22.7535 -100.569)
Norm : 0.368506 (-0.0533744 0.0666109)
------------------------------------------------------------
# Chi-Squared = 61.34 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 57 degrees of freedom
# Null hypothesis probability = 3.233796e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.391e-07 2.429e-08
25- 50 2.532e-07 3.490e-08
50-150 4.743e-07 8.822e-08
15-150 8.666e-07 1.152e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.00949 (-2.82316 2.69993)
R1^2/D10^2 : 6.63798E-02 (-0.0389472 0.265382)
kT2 [keV] : 27.4028 (-22.0593 107.385)
R2^2/D10^2 : 7.13540E-04 (-0.00069973 0.00193227)
------------------------------------------------------------
# Chi-Squared = 61.31 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.601360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.252e-07 7.008e-08
25- 50 2.734e-07 1.397e-07
50-150 4.697e-07 2.709e-07
15-150 8.683e-07 4.551e-07
Peak spectrum fit
Power-law model
Time interval is from -92.520 sec. to -91.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.08745 ( )
Norm@50keV : 2.26170E-04 ( -0.000225629 0.00443277 )
------------------------------------------------------------
# Chi-Squared = 62.99 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 57 degrees of freedom
# Null hypothesis probability = 2.728749e-01
Photon flux (15-150 keV) in 1 sec: 0.108609 ( -0.108609 0.43188 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97292e-08 ( -1.97292e-08 4.55212e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -92.520 sec. to -91.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.165032 ( -0.0801412 1.36164 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 2.23030E-03 ( -0.00219606 0.00295224 )
------------------------------------------------------------
# Chi-Squared = 63.88 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 56 degrees of freedom
# Null hypothesis probability = 2.191937e-01
Photon flux (15-150 keV) in 1 sec: 0.108280 ( -0.10828 0.426811 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04494e-07 ( -7.04494e-07 2.94392e-06 ) ergs/cm2
Band function
Time interval is from -92.520 sec. to -91.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.625938 ( -0.0600778 -0.0600778 )
beta : 2.08519 ( -3.20474 -2.01673 )
Epeak [keV] : 14.4070 ( -14.407 -14.407 )
Norm@50keV : 5.57467E-04 ( -0.00055745 7607.06 )
------------------------------------------------------------
# Chi-Squared = 62.99 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Null hypothesis probability = 2.146616e-01
Photon flux (15-150 keV) in 1 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] : 198.103 ( )
R^2/D10^2 : 1.51593E-04 (-9.51676e-05 0.0382289)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.08 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.422314e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.204e-10 4.660e-10
25- 50 1.835e-09 3.586e-09
50-150 4.109e-08 6.225e-08
15-150 4.314e-08 6.525e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.324 ( )
Norm : 1.26833 (-1.11073 1.11466)
------------------------------------------------------------
# Chi-Squared = 67.03 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 57 degrees of freedom
# Null hypothesis probability = 1.707733e-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
------------------------------------------------------------
# Chi-Squared = 64.26 using 59 PHA bins.
# Chi-Squared = 62.95 using 59 PHA bins.
# Chi-Squared = 62.93 using 59 PHA bins.
# Chi-Squared = 62.88 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 55 degrees of freedom
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Reduced chi-squared = 1.143 for 55 degrees of freedom
# Null hypothesis probability = 1.840087e-01
# Null hypothesis probability = 2.156359e-01
# Null hypothesis probability = 2.162089e-01
# Null hypothesis probability = 2.174227e-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:
Sun Apr 1 20:20:53 EDT 2012