batgrbproduct analysis for trigger=970886

batgrbproduct Analysis for Trigger=970886

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 Jun 29 15:05:11 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger970886
======================================================================

  Trigger: 00970886      Segment: 000

  BAT Trigger Time: 610699662.336   [s; MET]
      Trigger Stop: 610699666.432   [s; MET]
               UTC: 2020-05-09T06:47:17.426340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 116.449929380473   Dec: -4.64135929017309  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.2
     Image Trigger?:     NO
     Rate S/N Ratio:     13.1529464379659  [ if not an image trigger ]
     Image S/N Ratio:    10.2

  Flight Position:   [ source = BAT ]
    RA: 116.449929380473   Dec: -4.64135929017309  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 116.414946348068   Dec: -4.63401519229606  [deg; J2000]  
        { 07h 45m 39.6s , -04d 38' 02.5" }
         +/- 1.70519975245069 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.802992935622336 [arcmin] (formal 1-sigma fit error)
    SNR: 14.1909302149057
 
  Angular difference between Flight and Ground position is 2.138011 arcmin
 
  Partial Coding Fraction: 0.3984375    [ including projection effects ]

  Duration
     T90: 828.227999925613 +/- 13.3825565010765
        Measured from: 3.36400008201599
                   to: 831.592000007629     [s; relative to TRIGTIME]
     T50: 607.999999880791 +/- 209.406043122585
        Measured from: 206.236000061035
                   to: 814.235999941826     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 822.692000031471     
                   to: 823.692000031471     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.796000003814697     
                   to: 848.991999983788     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.081621   4.197761   3.242221   0.845820
           0.180387   0.187450   0.166827   0.152894 [error]
 Peak      0.064290   0.049961   0.039725   0.013032
           0.006603   0.006943   0.006016   0.005086 [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 9.35e-07 1.71e-06 2.40e-06 7.04e-06 6.87e-06 1.21e-05   erg/cm2
              Error 8.37e-08 9.13e-08 1.62e-07 1.04e-06 3.90e-07 1.16e-06   erg/cm2
Peak flux Power-law 5.11e-01 4.25e-01 2.40e-01 2.00e-01 1.26e+00 1.38e+00   ph/cm2/s
              Error 9.97e-02 5.35e-02 5.05e-02 8.31e-02 1.59e-01 1.78e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.84e-07 1.76e-06 2.44e-06 4.29e-06 6.68e-06 9.35e-06   erg/cm2
              Error 1.00e-07 1.09e-07 1.73e-07 2.35e-06 4.41e-07 2.39e-06   erg/cm2
Peak flux Cutoff-PL 5.16e-01 4.23e-01 2.38e-01 2.01e-01 1.26e+00 1.38e+00   ph/cm2/s
              Error 1.04e-01 -------- -------- 8.14e-02 1.59e-01 1.87e-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    1.512    0.092    -      -           8.54e-04 4.41e-05    0.000  0
CPL   1.186    0.367     124.9  -41.1      1.24e-03 5.37e-04    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.826    0.252    -      -           9.08e-03 1.42e-03    0.000  0
CPL   2.186    0.433      73.1    0.0      5.96e-03 0.00e+00    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: 825.152000 sec.
T50 in the 50-300 keV band: 769.152000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  849.788   -0.796  848.992
T90   828.228    3.364  831.592
T50   608.000  206.236  814.236
Peak    1.000  822.692  823.692

Click here for the BAT GCN circular template

Special notes of this burst

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
  116.4149    -4.6340   0.0136    46.5133  -171.0355         2.1330344     14.191 TRIG_00970886                 
 
Foreground time interval of the image:
 -0.796  39.965 (delta_t =  40.761 [sec])
Background time interval of the image:
-239.336  -0.796 (delta_t = 238.540 [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 4.096000

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 4.096000

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 4.096000

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   -0.796 sec. to  848.992 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51170     ( -0.0913393   0.0917008 )
Norm@50keV  : 8.53962E-04    ( -4.4143e-05   4.40329e-05 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 849.8 sec: 0.106950 ( -0.005556  0.005563 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.87221e-06 ( -3.88308e-07  3.90798e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.796 sec. to  848.992 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18648     ( -0.382472   0.351304 )
Epeak [keV] : 124.898      ( -42.7204 -124.898 )
Norm@50keV  : 1.24433E-03    ( -0.000401619   0.00067245 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 849.8 sec: 0.105032 ( -0.0059234  0.005921 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.68031e-06 ( -4.41574e-07  4.4111e-07 ) ergs/cm2

Band function

Time interval is from   -0.796 sec. to  848.992 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]    : 14.9262  (  )
R^2/D10^2   : 1.20377E-02  (   )
(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  4.775e-07   4.759e-08
25- 50  1.889e-06   1.270e-07
50-150  2.858e-06   2.932e-07
15-150  5.224e-06   3.183e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-34.7727      -200)
Norm        : 0.435682       (-0.0219216     0.0219216)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.238e-07   5.311e-08
25- 50  1.777e-06   1.109e-07
50-150  3.897e-06   2.596e-07
15-150  6.598e-06   8.184e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.98404        (-1.21002      1.38028)
R1^2/D10^2  : 0.107213        (-0.0466781      0.0985847)
kT2 [keV]   : 25.3245        (-3.91394      6.44982)
R2^2/D10^2  : 1.50550E-03    (-0.000832367   0.00131084)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.538e-07   1.570e-07
25- 50  1.779e-06   2.681e-07
50-150  3.996e-06   1.017e-06
15-150  6.630e-06   1.413e-06

Peak spectrum fit

Power-law model

Time interval is from  822.692 sec. to  823.692 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82604     ( -0.243149   0.260085 )
Norm@50keV  : 9.07916E-03    ( -0.00144488   0.00138654 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.26401 ( -0.15936  0.15938 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.35314e-08 ( -1.31302e-08  1.34146e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  822.692 sec. to  823.692 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.18577     ( -0.811955   0.0533727 )
Epeak [keV] : 73.1238      (   )
Norm@50keV  : 5.95765E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.26400 ( -0.15915  0.1593 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from  822.692 sec. to  823.692 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]    : 12.1276  (-2.21175  2.65383)
R^2/D10^2   : 0.279108  (-0.140426   0.299735)
(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  8.689e-09   2.096e-09
25- 50  2.769e-08   5.530e-09
50-150  2.466e-08   7.805e-09
15-150  6.104e-08   1.190e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 107.224       (-43.1569      -107.224)
Norm        : 5.44406       (-0.835937     1.16327)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.422e-08   2.475e-09
25- 50  2.493e-08   4.590e-09
50-150  4.199e-08   2.067e-08
15-150  8.114e-08   2.408e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.66284        (-0.974775      1.35474)
R1^2/D10^2  : 23.8867        (-18.3459      105.301)
kT2 [keV]   : 19.2588        (-4.05173      6.32209)
R2^2/D10^2  : 4.54639E-02    (-0.0288138   0.0617816)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.724e-08   8.543e-09
25- 50  1.990e-08   7.233e-09
50-150  4.379e-08   1.971e-08
15-150  8.094e-08   2.876e-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: 1.06716     ( -0.183238   0.175676 )
Norm@50keV  : 3.36679E-03    ( -0.000365214   0.000362272 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 40.76 sec: 0.389381 ( -0.0439004  0.0441964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45016e-06 ( -1.54734e-07  1.55121e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.388917     ( -0.844557   0.637225 )
Epeak [keV] : 138.505      ( -47.282 -138.51 )
Norm@50keV  : 6.66743E-03    ( -0.00319589   0.0082804 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 40.76 sec: 0.378526 ( -0.045037  0.045465 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41275e-06 ( -1.64291e-07  1.62526e-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)  = 1.71e-06
S(50-100 keV) = 2.40e-06

T90 vs. Hardness ratio plot

T90                                   = 828.227999925613 sec.
Hardness ratio (energy fluence ratio) = 1.40351

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.36219
Count Ratio (50-100 keV) / (15-25 keV) = 1.05212

Mask shadow pattern

IMX = -1.041394159813912E+00, IMY = 1.642787071514176E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.336000 -0.796000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
159.4542  56.3866    2.8  24.3   21.2   0.9667   4.2 ------	UNKNOWN

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

Time interval of the image:
-0.796000 39.964590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
178.5205  26.9259    2.2  39.2   79.3   1.6334   5.2 ------	UNKNOWN                       
160.2602  20.2422    1.8  29.7  106.8   0.8031   6.5 ------	UNKNOWN                       
234.5574  74.7139    2.3  55.3    3.4   2.0756   5.1 ------	UNKNOWN                       
116.4150  -4.6340    0.8  46.5 -171.0   2.1329  14.2 ------	UNKNOWN                       
113.0757  -8.8286    2.1  51.6 -168.7   1.1000   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
103.564590 962.695500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6420  22.0442    0.9  41.8  -68.8  32.3780  13.2    1.8	Crab                          
135.7697 -40.4341    0.0  39.8  137.0   2.4381   1.5   13.2	Vela X-1                      
155.1002  19.8850    2.9  45.2   36.0   6.7025   3.9 ------	UNKNOWN                       
116.4361  -4.6201    0.8   0.0  -89.7   9.5437  14.8 ------	UNKNOWN                       
114.5282  20.1132    4.7  24.8  -24.2   1.6826   2.5 ------	UNKNOWN                       
123.1386  42.9233    2.9  47.9  -13.3   4.9637   4.0 ------	UNKNOWN                       
 65.5489 -29.5584    2.5  54.1 -143.4  15.2471   4.6 ------	UNKNOWN

Plot creation:
Wed Jul  1 20:13:23 EDT 2020