batgrbproduct analysis for trigger=952791

batgrbproduct Analysis for Trigger=952791

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 14:53:22 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger952791
======================================================================

  Trigger: 00952791      Segment: 000

  BAT Trigger Time: 601829096   [s; MET]
      Trigger Stop: 601829160   [s; MET]
               UTC: 2020-01-27T14:44:31.666360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 295.204508762955   Dec: 44.9096354629614  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.94
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.94

  Flight Position:   [ source = BAT ]
    RA: 295.204508762955   Dec: 44.9096354629614  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 295.20695028219   Dec: 44.9326548034124  [deg; J2000]  
        { 19h 40m 49.7s , +44d 55' 57.6" }
         +/- 2.42959923170196 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.05821666267262 [arcmin] (formal 1-sigma fit error)
    SNR: 8.55765169539298
 
  Angular difference between Flight and Ground position is 1.385050 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 217.023999810219 +/- 23.5884935159922
        Measured from: -138.743999958038
                   to: 78.2799998521805     [s; relative to TRIGTIME]
     T50: 90.0479998588562 +/- 19.8181041459309
        Measured from: -45.5599999427795
                   to: 44.4879999160767     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 41.8439999818802     
                   to: 42.8439999818802     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -144.31200003624     
                   to: 92.9359999895096     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.058027   1.382850   1.049393   0.353861
           0.132552   0.137462   0.122907   0.114377 [error]
 Peak      0.008246   0.037374   0.030884  -0.007082
           0.009051   0.009151   0.008147   0.007443 [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 3.68e-07 6.21e-07 7.99e-07 2.07e-06 2.36e-06 3.87e-06   erg/cm2
              Error 6.55e-08 6.82e-08 1.24e-07 6.84e-07 2.93e-07 7.88e-07   erg/cm2
Peak flux Power-law 1.96e-01 2.22e-01 1.79e-01 2.41e-01 6.85e-01 8.38e-01   ph/cm2/s
              Error 1.07e-01 7.93e-02 6.34e-02 1.69e-01 2.24e-01 2.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.70e-07 6.17e-07 7.97e-07 2.13e-06 2.37e-06 3.80e-06   erg/cm2
              Error 6.70e-08 8.00e-08 1.50e-07 7.22e-07 3.08e-07 1.09e-06   erg/cm2
Peak flux Cutoff-PL 1.05e-01 2.61e-01 2.20e-01 3.97e-02 6.21e-01 6.25e-01   ph/cm2/s
              Error 1.17e-01 1.08e-01 8.87e-02 8.86e-02 2.19e-01 2.30e-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    1.637    0.197    -      -           1.07e-03 1.23e-04    0.000  0
CPL   1.635    0.775    10000.0    0.0      1.07e-03 1.20e-04    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.309    0.490    -      -           5.74e-03 1.82e-03    0.000  0
CPL  -1.510    3.739      65.2   45.3      1.24e-01 2.54e+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: 220.352000 sec.
T50 in the 50-300 keV band: 158.784000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  237.248 -144.312   92.936
T90   217.024 -138.744   78.280
T50    90.048  -45.560   44.488
Peak    1.000   41.844   42.844

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
  295.2070    44.9327   0.0225    37.4705   -38.1741         3.6752889      8.558 TRIG_00952791                 
 
Foreground time interval of the image:
-144.312  72.901 (delta_t = 217.213 [sec])
Background time interval of the image:
-365.699 -346.468 (delta_t =  19.232 [sec])
-239.000 -144.312 (delta_t =  94.688 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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 -144.312 sec. to   92.936 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63711     ( -0.195305   0.19912 )
Norm@50keV  : 1.06888E-03    ( -0.000124075   0.000122314 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 237.2 sec: 0.138986 ( -0.015174  0.015199 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.36148e-06 ( -2.91414e-07  2.94987e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -144.312 sec. to   92.936 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63542     ( -0.638454   0.912524 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 1.07120E-03    ( -0.000124867   0.000114741 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 237.2 sec: 0.139475 ( -0.017366  0.016135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37812e-06 ( -3.77314e-07  2.39368e-07 ) ergs/cm2

Band function

Time interval is from -144.312 sec. to   92.936 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]    : 13.1322  (-1.9907  2.39026)
R^2/D10^2   : 2.38327E-02  (-0.0107111   0.0194338)
(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  2.067e-07   4.513e-08
25- 50  7.198e-07   1.140e-07
50-150  7.894e-07   1.974e-07
15-150  1.716e-06   2.706e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 163.252       (-66.7474      -163.626)
Norm        : 0.566033       (-0.0667063     0.0778279)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.422e-07   1.785e-07
25- 50  6.418e-07   3.447e-07
50-150  1.310e-06   7.443e-07
15-150  2.294e-06   1.271e-06

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.48431        (-1.59016      1.91227)
R1^2/D10^2  : 0.224370        (-0.133162      0.418339)
kT2 [keV]   : 28.0060        (-7.87647      20.8192)
R2^2/D10^2  : 1.30275E-03    (-0.00105859   0.00287072)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.692e-07   1.779e-07
25- 50  6.242e-07   2.585e-07
50-150  1.391e-06   7.495e-07
15-150  2.384e-06   9.572e-07

Peak spectrum fit

Power-law model

Time interval is from   41.844 sec. to   42.844 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30920     ( -0.493775   0.485391 )
Norm@50keV  : 5.73765E-03    ( -0.0018173   0.00181728 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.685393 ( -0.222695  0.226143 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.66096e-08 ( -1.88393e-08  1.92499e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   41.844 sec. to   42.844 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.51040     ( -5.11519   2.36325 )
Epeak [keV] : 65.2321      ( -18.6144 71.9345 )
Norm@50keV  : 0.123562    ( -0.123069   50.5871 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.621415 ( -0.21221  0.226551 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.95256e-08 ( -1.83554e-08  1.9924e-08 ) ergs/cm2

Band function

Time interval is from   41.844 sec. to   42.844 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]    : 16.8330  (-4.44974  6.59102)
R^2/D10^2   : 6.00454E-02  (-0.0600454   0.114652)
(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  3.474e-09   2.112e-09
25- 50  1.525e-08   9.260e-09
50-150  3.075e-08   1.965e-08
15-150  4.948e-08   2.999e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-117.475      -199.363)
Norm        : 2.91233       (-0.917511     0.917512)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.252e-09   4.574e-09
25- 50  1.395e-08   8.450e-09
50-150  3.059e-08   1.925e-08
15-150  5.180e-08   3.208e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.00003E-04        (4.56543e-09      -0.000100003)
R1^2/D10^2  : 7.26684E+06        (-7.26684e+06      -7.26684e+06)
kT2 [keV]   : 16.8315        (-4.44821      6.59259)
R2^2/D10^2  : 6.00638E-02    (-0.0600638   0.114633)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.626e-09   1.697e+03
25- 50  1.557e-08   1.728e+04
50-150  2.958e-08   3.246e+05
15-150  4.878e-08   3.380e+05

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: 1.65232     ( -0.205285   0.210098 )
Norm@50keV  : 1.06596E-03    ( -0.000130907   0.000128796 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 217.2 sec: 0.139295 ( -0.0159366  0.0159605 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.15278e-06 ( -2.79656e-07  2.83481e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65861     ( -0.211477   0.206415 )
Epeak [keV] : 9999.36      ( -9999.35 -9999.36 )
Norm@50keV  : 1.06268E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 217.2 sec: 0.139261 ( -0.016016  0.015933 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.15179e-06 ( -2.89969e-07  2.82238e-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)  = 6.21e-07
S(50-100 keV) = 7.99e-07

T90 vs. Hardness ratio plot

T90                                   = 217.023999810219 sec.
Hardness ratio (energy fluence ratio) = 1.28663

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.30701
Count Ratio (50-100 keV) / (15-25 keV) = 0.99184

Mask shadow pattern

IMX = 6.025803937470950E-01, IMY = 4.737434617925653E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-365.699400 -346.467700
-239.000000 -144.312000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5170  35.3285    7.3  42.8  -51.6   0.5747   1.6    8.4	Cyg X-1                       
308.2042  40.9325    4.1  34.2  -54.9   0.6411   2.8    4.4	Cyg X-3                       
326.0422  38.4075    6.4  28.5  -79.6   0.3741   1.8    8.0	Cyg X-2                       
341.8536  45.8081    2.4  16.7  -99.1   0.7414   4.9 ------	UNKNOWN                       
 19.4724   6.6882    2.5  57.3 -160.9   3.6111   4.7 ------	UNKNOWN                       
272.3737  34.8817    3.0  56.3  -28.3   2.8075   3.9 ------	UNKNOWN

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

Time interval of the image:
-144.312000 72.900630
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5698  35.0665    5.2  43.0  -51.9   1.6908   2.2    8.2	Cyg X-1                       
308.2785  40.9173    3.0  34.2  -55.0  -1.7098  -3.9    7.9	Cyg X-3                       
326.0063  38.3504    6.6  28.6  -79.6  -0.7529  -1.8    8.0	Cyg X-2                       
236.1860  66.5387    2.3  44.8   19.4   3.0546   5.2 ------	UNKNOWN                       
 17.5869  20.1191    2.2  43.8 -163.1   2.4526   5.3 ------	UNKNOWN                       
295.2069  44.9327    1.3  37.5  -38.2   3.6750   8.6 ------	UNKNOWN                       
325.3063  32.4653    2.4  34.1  -83.8   2.6723   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
129.500600 963.116100
965.000000 965.600600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4323  35.5016    4.0  32.2   12.6   1.8407   2.9    9.6	Her X-1                       
268.2694  -1.4465   14.4  52.2  -39.8  -2.5320  -0.8    5.9	SW J1753.5-0127               
288.7689  11.0026    4.1  34.4  -63.5   2.6017   2.8    3.8	GRS 1915+105                  
299.4458  35.0981    5.2  10.3  -94.5   1.0999   2.2    9.4	Cyg X-1                       
308.0754  40.9727 1114.8  10.2 -146.6   0.0048   0.0    2.0	Cyg X-3                       
326.3493  38.3633    4.3  24.0 -160.0   1.5148   2.7    8.7	Cyg X-2                       
231.0932  27.6823    4.2  53.0   19.2   8.4410   2.7 ------	UNKNOWN                       
266.9269  56.9386    3.0  21.3   59.8   2.3504   3.8 ------	UNKNOWN                       
356.0426  42.7402    3.2  42.9  175.6   3.2376   3.6 ------	UNKNOWN                       
313.3523  44.4490    3.5  12.9 -169.2   1.6568   3.3 ------	UNKNOWN                       
256.7675  18.9898    2.6  41.0  -11.2   3.4103   4.4 ------	UNKNOWN                       
335.3435  18.7804    3.4  42.3 -139.9   3.4989   3.4 ------	UNKNOWN                       
354.3604  15.7793    3.0  57.2 -154.1  13.6089   3.9 ------	UNKNOWN                       
332.9147   9.5496    2.7  48.0 -129.1  10.1724   4.2 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:35:08 EDT 2020