batgrbproduct analysis for trigger=948361

batgrbproduct Analysis for Trigger=948361

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.47
    Process Start Time (local time): Mon May 18 15:05:44 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger948361
======================================================================

  Trigger: 00948361      Segment: 000

  BAT Trigger Time: 600227200.448   [s; MET]
      Trigger Stop: 600227208.64   [s; MET]
               UTC: 2020-01-09T01:46:16.218040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 307.170901934691   Dec: 53.0032235193214  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.72
     Image Trigger?:     NO
     Rate S/N Ratio:     19.5703857907809  [ if not an image trigger ]
     Image S/N Ratio:    12.72

  Flight Position:   [ source = BAT ]
    RA: 307.170901934691   Dec: 53.0032235193214  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 307.115141759145   Dec: 52.9890950301936  [deg; J2000]  
        { 20h 28m 27.6s , +52d 59' 20.7" }
         +/- 1.17107677000977 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.461953979689776 [arcmin] (formal 1-sigma fit error)
    SNR: 24.2738847378558
 
  Angular difference between Flight and Ground position is 2.184781 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 112 +/- 32
        Measured from: -31.4479999542236
                   to: 80.5520000457764     [s; relative to TRIGTIME]
     T50: 32 +/- 16
        Measured from: -15.4479999542236
                   to: 16.5520000457764     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.05200004577637     
                   to: 9.05200004577637     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.4479999542236     
                   to: 112.552000045776     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.818485   1.150226   0.987526   0.272596
           0.080014   0.082252   0.072051   0.063038 [error]
 Peak      0.025130   0.032785   0.029477  -0.001019
           0.006887   0.007191   0.006239   0.005549 [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 2.29e-07 4.74e-07 7.68e-07 2.78e-06 2.12e-06 4.25e-06   erg/cm2
              Error 3.25e-08 3.90e-08 7.06e-08 5.88e-07 1.75e-07 6.31e-07   erg/cm2
Peak flux Power-law 2.00e-01 2.26e-01 1.84e-01 2.49e-01 7.00e-01 8.58e-01   ph/cm2/s
              Error 7.72e-02 5.60e-02 4.92e-02 1.36e-01 1.60e-01 2.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.32e-07 4.71e-07 7.62e-07 2.97e-06 2.13e-06 4.08e-06   erg/cm2
              Error -------- 5.08e-08 9.12e-08 6.64e-07 2.26e-07 1.10e-06   erg/cm2
Peak flux Cutoff-PL 1.69e-01 2.54e-01 1.96e-01 7.98e-02 6.75e-01 6.99e-01   ph/cm2/s
              Error 8.80e-02 7.19e-02 5.84e-02 1.51e-01 1.64e-01 2.29e-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    1.305    0.137    -      -           1.49e-03 1.09e-04    0.000  0
CPL   1.306    0.138    9999.4    0.0      1.50e-03 3.40e-04    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.301    0.369    -      -           5.87e-03 1.33e-03    0.000  0
CPL   0.204    1.728      78.8  -25.3      2.20e-02 1.42e-01    0.000  0
 
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: 40.768000 sec.
T50 in the 50-300 keV band: 23.040000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  144.000  -31.448  112.552
T90   112.000  -31.448   80.552
T50    32.000  -15.448   16.552
Peak    1.000    8.052    9.052

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  307.1151    52.9891   0.0080    15.2268  -179.9059         3.0567484     24.274 TRIG_00948361                 
 
Foreground time interval of the image:
-31.448  50.653 (delta_t =  82.101 [sec])
Background time interval of the image:
-239.448 -31.448 (delta_t = 208.000 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) 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.
4) 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.
5) 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)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from  -31.448 sec. to  112.552 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30504     ( -0.137286   0.136229 )
Norm@50keV  : 1.49306E-03    ( -0.00010931   0.00010922 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 144 sec: 0.178295 ( -0.013477  0.013522 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12223e-06 ( -1.73988e-07  1.7536e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -31.448 sec. to  112.552 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30629     ( -0.142683   0.132644 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.49626E-03    ( -0.000109275   0.000570617 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 144 sec: 0.179262 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.13306e-06 ( -2.36254e-07  2.15182e-07 ) ergs/cm2

Band function

Time interval is from  -31.448 sec. to  112.552 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 18.1148  (-1.94514  2.26601)
R^2/D10^2   : 1.06647E-02  (-0.00344171   0.0049677)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.007e-07   1.536e-08
25- 50  4.679e-07   5.285e-08
50-150  1.116e-06   1.665e-07
15-150  1.685e-06   1.764e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-21.5772      -200)
Norm        : 0.737606       (-0.0544755     0.0544755)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.645e-07   2.203e-08
25- 50  5.089e-07   6.170e-08
50-150  1.116e-06   3.345e-07
15-150  1.890e-06   4.146e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.90384        (-1.64951      2.00509)
R1^2/D10^2  : 0.186034        (-0.106396      0.319807)
kT2 [keV]   : 32.6979        (-7.13203      15.2576)
R2^2/D10^2  : 1.34858E-03    (-0.000907217   0.00166047)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.329e-07   8.180e-08
25- 50  4.657e-07   1.152e-07
50-150  1.468e-06   4.910e-07
15-150  2.167e-06   5.482e-07

Peak spectrum fit

Power-law model

Time interval is from    8.052 sec. to    9.052 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30127     ( -0.373948   0.364142 )
Norm@50keV  : 5.86953E-03    ( -0.00132906   0.00132552 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.700427 ( -0.159503  0.159912 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.79896e-08 ( -1.44163e-08  1.47197e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.052 sec. to    9.052 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.203971     ( -2.19253   1.26409 )
Epeak [keV] : 78.7575      ( -28.2282 -78.7575 )
Norm@50keV  : 2.19539E-02    ( -0.0219538   0.261604 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.674839 ( -0.16324  0.16394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.27036e-08 ( -1.52908e-08  1.64285e-08 ) ergs/cm2

Band function

Time interval is from    8.052 sec. to    9.052 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.6911  (-3.63065  5.1457)
R^2/D10^2   : 7.30637E-02  (-0.045801   0.108708)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.735e-09   1.878e-09
25- 50  1.545e-08   6.190e-09
50-150  2.639e-08   1.405e-08
15-150  4.558e-08   1.927e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.357       (-95.9247      -199.361)
Norm        : 2.90169       (-0.653582     0.654997)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.225e-09   4.351e-09
25- 50  1.390e-08   8.075e-09
50-150  3.048e-08   1.784e-08
15-150  5.161e-08   3.075e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 25.8703        (-25.1095      -25.1095)
R1^2/D10^2  : 9.50625E-03        (-0.0107979      0.0947938)
kT2 [keV]   : 8.56889        (-8.34419      -8.34419)
R2^2/D10^2  : 0.317862    (-0.336756   -0.336756)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.506e-09   3.467e-09
25- 50  1.495e-08   8.720e-09
50-150  3.375e-08   1.862e-08
15-150  5.420e-08   2.787e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29594     ( -0.121936   0.121087 )
Norm@50keV  : 2.28245E-03    ( -0.000148576   0.000148519 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 82.1 sec: 0.272100 ( -0.0183649  0.0184294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85359e-06 ( -1.34843e-07  1.3564e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29227     ( -0.280232   0.16085 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 2.29196E-03    ( -0.000149039   0.000148952 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 82.1 sec: 0.271990 ( -0.018024  0.018406 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8497e-06 ( -1.31081e-07  1.37074e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 4.74e-07
S(50-100 keV) = 7.68e-07

T90 vs. Hardness ratio plot

T90                                   = 112 sec.
Hardness ratio (energy fluence ratio) = 1.62025

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.40531
Count Ratio (50-100 keV) / (15-25 keV) = 1.20653

Mask shadow pattern

IMX = -2.721954509414319E-01, IMY = 4.470945750418586E-04

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-239.448000 -31.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4644  35.3360  404.5  25.8  -17.9   0.0066   0.0    0.5	Her X-1                       
299.6511  35.1615    3.4  21.3 -120.8   0.9424   3.4    3.8	Cyg X-1                       
308.0308  41.1017    6.2  21.0 -145.5  -0.4177  -1.9    9.6	Cyg X-3                       
326.2176  38.1773   41.9  33.6 -160.5   0.0838   0.3    8.9	Cyg X-2                       
 40.0314  81.4553    2.3  42.2  113.7   4.7675   4.9 ------	UNKNOWN                       
235.4964  20.3405    2.1  47.9  -11.4   2.3405   5.4 ------	UNKNOWN                       
277.8106  10.3284    3.1  42.2  -71.6   3.8372   3.7 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-31.448000 50.652600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6980  35.3037   81.6  25.7  -18.3   0.0207   0.1   12.0	Her X-1                       
299.5734  35.3336    9.2  21.2 -120.9   0.1993   1.3    8.0	Cyg X-1                       
308.1433  41.0942   16.8  21.1 -145.6   0.0947   0.7    8.6	Cyg X-3                       
325.9260  38.2450    0.0  33.4 -160.3   0.1520   1.0   12.4	Cyg X-2                       
307.1151  52.9891    0.5  15.2 -179.9   3.0568  24.2 ------	UNKNOWN                       
237.3201  11.8851    2.6  53.9  -19.4   1.9711   4.5 ------	UNKNOWN                       
328.1570  15.0088    2.2  52.2 -139.6   3.5139   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
89.252590 962.593700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4644  35.3502   68.1  40.6  -20.4  -0.1868  -0.2    0.6	Her X-1                       
299.5628  35.1686    2.4  18.6  -86.6   4.7188   4.8    2.4	Cyg X-1                       
308.1928  41.0200    4.7  12.0 -110.1   1.9887   2.4    5.5	Cyg X-3                       
326.1256  38.4029    3.6  19.6 -155.7   2.4574   3.2    5.3	Cyg X-2                       
 41.0307  74.7226    3.9  40.6   97.5   8.5783   3.0 ------	UNKNOWN                       
230.2918  35.6158    4.0  54.8   -1.9   7.7537   2.9 ------	UNKNOWN                       
354.1965  11.9970    2.9  55.5 -166.7  10.4748   4.0 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:41:41 EDT 2020