batgrbproduct analysis for trigger=963260

batgrbproduct Analysis for Trigger=963260

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 14:24:43 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger963260
======================================================================

  Trigger: 00963260      Segment: 000

  BAT Trigger Time: 606760772.608   [s; MET]
      Trigger Stop: 606760776.704   [s; MET]
               UTC: 2020-03-24T16:39:07.954400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 222.685467928864   Dec: 35.9684973487692  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.81
     Image Trigger?:     NO
     Rate S/N Ratio:     9.8488578017961  [ if not an image trigger ]
     Image S/N Ratio:    9.81

  Flight Position:   [ source = BAT ]
    RA: 222.685467928864   Dec: 35.9684973487692  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 222.661127600395   Dec: 35.9222331826329  [deg; J2000]  
        { 14h 50m 38.7s , +35d 55' 20.0" }
         +/- 1.44877700451342 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.619200117063945 [arcmin] (formal 1-sigma fit error)
    SNR: 17.9108490670039
 
  Angular difference between Flight and Ground position is 3.017156 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 158.884000062943 +/- 104.647323068704
        Measured from: -33.8720000982285
                   to: 125.011999964714     [s; relative to TRIGTIME]
     T50: 49.3880000114441 +/- 20.4264505864496
        Measured from: -6.26400005817413
                   to: 43.12399995327     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 123.240000009537     
                   to: 124.240000009537     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -106.932000041008     
                   to: 199.927999973297     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.476377   1.550385   0.836478   0.304658
           0.153254   0.160307   0.143088   0.125461 [error]
 Peak      0.049557   0.039655   0.045840   0.015320
           0.027175   0.027225   0.027445   0.022687 [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 3.74e-07 6.14e-07 7.65e-07 1.88e-06 2.29e-06 3.64e-06   erg/cm2
              Error 4.85e-08 5.16e-08 9.67e-08 4.90e-07 2.27e-07 5.80e-07   erg/cm2
Peak flux Power-law 3.62e-01 6.11e-02 4.88e-03 4.19e-04 4.28e-01 4.28e-01   ph/cm2/s
              Error 3.82e-01 5.73e-02 5.26e-03 5.74e-02 4.38e-01 4.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.55e-07 6.48e-07 7.70e-07 8.92e-07 2.19e-06 2.66e-06   erg/cm2
              Error 5.46e-08 6.68e-08 1.04e-07 8.33e-07 2.55e-07 8.90e-07   erg/cm2
Peak flux Cutoff-PL 3.39e-01 3.30e-01 1.02e-02 4.19e-07 6.79e-01 6.80e-01   ph/cm2/s
              Error 4.32e-01 -------- 1.19e-02 -------- 5.63e-01 5.63e-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    1.683    0.150    -      -           1.78e-03 1.66e-04    0.000  0
CPL   1.222    0.580      76.8  -26.8      3.17e-03 2.62e-03    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.647    3.783    -      -           3.86e-04 3.84e-04    0.000  0
CPL   1.000    0.000      80.0    0.0      2.58e-04 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: 73.728000 sec.
T50 in the 50-300 keV band: 26.816000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  306.860 -106.932  199.928
T90   158.884  -33.872  125.012
T50    49.388   -6.264   43.124
Peak    1.000  123.240  124.240

Click here for the BAT GCN circular template

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

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  222.6611    35.9222   0.0107    18.7171     8.9846         3.3626199     17.911 TRIG_00963260                 
 
Foreground time interval of the image:
-106.932  29.293 (delta_t = 136.225 [sec])
Background time interval of the image:
-239.608 -106.932 (delta_t = 132.676 [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  -38.100 sec. to  100.400 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68347     ( -0.148058   0.151546 )
Norm@50keV  : 1.77901E-03    ( -0.000167124   0.000165005 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 138.5 sec: 0.234934 ( -0.019779  0.019786 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.28475e-06 ( -2.25687e-07  2.29043e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -38.100 sec. to  100.400 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22238     ( -0.635797   0.523495 )
Epeak [keV] : 76.8310      ( -23.3059 -76.831 )
Norm@50keV  : 3.17194E-03    ( -0.00147528   0.00376662 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 138.5 sec: 0.230464 ( -0.020503  0.020486 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18398e-06 ( -2.53213e-07  2.5765e-07 ) ergs/cm2

Band function

Time interval is from  -38.100 sec. to  100.400 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]    : 12.4478  (-1.3407  1.51746)
R^2/D10^2   : 4.97408E-02  (-0.016885   0.025525)
(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  2.263e-07   3.864e-08
25- 50  7.428e-07   8.338e-08
50-150  7.087e-07   1.460e-07
15-150  1.678e-06   1.877e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 134.962       (-42.6908      -131.94)
Norm        : 0.976466       (-0.095051     0.120715)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.501e-07   3.975e-08
25- 50  6.386e-07   1.076e-07
50-150  1.204e-06   5.838e-07
15-150  2.193e-06   6.086e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.80266        (-1.32733      1.66923)
R1^2/D10^2  : 0.503862        (-0.291162      0.838172)
kT2 [keV]   : 20.8595        (-4.04943      7.18301)
R2^2/D10^2  : 6.04395E-03    (-0.00407069   0.00568407)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.661e-07   1.754e-07
25- 50  6.285e-07   2.077e-07
50-150  1.167e-06   5.085e-07
15-150  2.161e-06   7.630e-07

Peak spectrum fit

Power-law model

Time interval is from  123.240 sec. to  124.240 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.64726     ( -4.64687   2.91879 )
Norm@50keV  : 3.86479E-04    ( -0.000386528   0.00038133 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.427919 ( -0.427919  0.44712 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41397e-08 ( -1.38483e-08  1.39321e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  123.240 sec. to  124.240 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 80.0000      (   )
Norm@50keV  : 2.57978E-04    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.678909 ( -0.554937  0.570261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51022e-08 ( -1.51018e-08  1.41939e-08 ) ergs/cm2

Band function

Time interval is from  123.240 sec. to  124.240 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]    : 5.46543  (-2.27622  1.68796)
R^2/D10^2   : 4.11658  (-4.11658   48.6217)
(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  1.411e-08   1.122e-08
25- 50  1.140e-08   1.008e-08
50-150  7.010e-10   6.545e-10
15-150  2.621e-08   2.105e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 10.8087       (-6.06667      11.6512)
Norm        : 18.1514       (-18.1514     101.703)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.392e-08   1.123e-08
25- 50  6.631e-09   5.585e-09
50-150  5.585e-10   5.870e-10
15-150  2.111e-08   1.704e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.54584        (-2.29981      1.70599)
R1^2/D10^2  : 3.82081        (-3.83668      47.8289)
kT2 [keV]   : 0.300939        (-0.300939      -0.300939)
R2^2/D10^2  : 2.14452E-05    (-2.09331e-05   -2.09331e-05)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.382e-08   1.143e-08
25- 50  1.155e-08   8.875e-09
50-150  7.576e-10   7.305e-10
15-150  2.613e-08   2.107e-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: 1.52296     ( -0.142773   0.144098 )
Norm@50keV  : 1.35431E-03    ( -0.000108645   0.000107866 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 136.2 sec: 0.170136 ( -0.0132837  0.0133109 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74348e-06 ( -1.54138e-07  1.55585e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52603     ( -0.14867   0.139919 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.35417E-03    ( -0.000776629   0.000600619 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 136.2 sec: 0.170203 ( -0.013418  0.01318 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74009e-06 ( -1.50991e-07  1.54887e-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)  = 6.14e-07
S(50-100 keV) = 7.65e-07

T90 vs. Hardness ratio plot

T90                                   = 158.884000062943 sec.
Hardness ratio (energy fluence ratio) = 1.24593

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.05013
Count Ratio (50-100 keV) / (15-25 keV) = 0.566575

Mask shadow pattern

IMX = 3.346575364159042E-01, IMY = -5.291261654185283E-02

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:
-239.608000 -106.932000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4007  35.3244  507.0  40.0  -22.7   0.0052   0.0    3.0	Her X-1                       
188.9898  22.9956    2.3  26.5   98.3   1.1778   5.1 ------	UNKNOWN                       
246.4699  16.3029    2.8  47.5    4.8   1.2779   4.1 ------	UNKNOWN                       
273.5907  26.9259    3.0  58.1  -27.0   4.1801   3.8 ------	UNKNOWN                       
276.2768  58.5841    3.9  43.6  -64.0   1.9422   3.0 ------	UNKNOWN                       
 97.8679  75.7708    3.1  48.1 -129.2   2.7071   3.8 ------	UNKNOWN

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

Time interval of the image:
-106.932000 29.292600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5908  35.2433    8.4  40.2  -22.7   0.3886   1.4    8.8	Her X-1                       
225.3237  20.3646    1.8  32.6   26.9   1.5912   6.4 ------	UNKNOWN                       
222.6609  35.9220    0.6  18.7    9.0   3.3623  17.9 ------	UNKNOWN                       
202.2278  61.9055    2.0  14.8 -111.0   1.0610   5.7 ------	UNKNOWN                       
121.2968  70.7958    2.0  43.4 -138.7   2.2958   5.9 ------	UNKNOWN                       
276.6746  49.6506    2.1  47.3  -52.5   4.5542   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
101.892600 114.292650
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6745  35.2890    6.1  25.9   46.5  -0.0953  -1.9   11.1	Her X-1                       
288.6944  10.9596   27.5  46.9  -13.5   0.0316   0.4    6.2	GRS 1915+105                  
299.7585  35.1673    3.1  26.9  -42.9   0.1739   3.7    8.5	Cyg X-1                       
308.0904  40.8204    3.8  26.1  -62.3   0.1712   3.1    8.0	Cyg X-3                       
326.1362  38.2343    4.3  37.5  -78.5  -0.2881  -2.7    5.5	Cyg X-2                       
264.1605   3.2652    2.1  54.4   18.3   1.2308   5.6 ------	UNKNOWN                       
272.7779  85.1043    1.8  28.3 -177.0   0.2735   6.3 ------	UNKNOWN                       
296.4204  11.4852    2.1  48.0  -23.7   0.4922   5.5 ------	UNKNOWN

Plot creation:
Mon Jun 29 01:01:56 EDT 2020