batgrbproduct analysis for trigger=1054681

batgrbproduct Analysis for Trigger=1054681

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 v2.48
    Process Start Time (local time): Fri Jul 29 23:04:38 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1054681
======================================================================

  Trigger: 01054681      Segment: 000

  BAT Trigger Time: 645047514.688   [s; MET]
      Trigger Stop: 645047515.712   [s; MET]
               UTC: 2021-06-10T19:51:27.514180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 243.938816073423   Dec: 14.3913470955268  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.54
     Image Trigger?:     NO
     Rate S/N Ratio:     46.5295604965274  [ if not an image trigger ]
     Image S/N Ratio:    10.54

  Flight Position:   [ source = BAT ]
    RA: 243.938816073423   Dec: 14.3913470955268  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 243.928518473746   Dec: 14.3984723907893  [deg; J2000]  
        { 16h 15m 42.8s , +14d 23' 54.5" }
         +/- 0.814370488769121 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.397282721599225 [arcmin] (formal 1-sigma fit error)
    SNR: 40.7864103070031
 
  Angular difference between Flight and Ground position is 0.735475 arcmin
 
  Partial Coding Fraction: 0.2460938    [ including projection effects ]

  Duration
     T90: 69.3839999437332 +/- 2.53414757519244
        Measured from: -0.663999915122986
                   to: 68.7200000286102     [s; relative to TRIGTIME]
     T50: 25.4399999380112 +/- 0.622009678277772
        Measured from: 8.50400006771088
                   to: 33.944000005722     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.94800007343292     
                   to: 8.94800007343292     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -12.039999961853     
                   to: 142.472000002861     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     9.296134  16.739654  17.316489   5.827818
           0.134215   0.158668   0.162283   0.124557 [error]
 Peak      0.237698   0.495221   0.701118   0.350177
           0.020299   0.027480   0.032357   0.026318 [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 3.17e-06 7.29e-06 1.33e-05 5.79e-05 3.62e-05 8.17e-05   erg/cm2
              Error 1.08e-07 1.48e-07 1.99e-07 2.07e-06 5.25e-07 2.11e-06   erg/cm2
Peak flux Power-law 1.08e-03 1.34e-02 1.52e-01 1.65e+01 6.92e-01 1.69e+01   ph/cm2/s
              Error 5.48e-04 5.80e-03 5.46e-02 3.27e+00 2.25e-01 3.34e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.00e-06 7.31e-06 1.36e-05 4.93e-05 3.60e-05 7.31e-05   erg/cm2
              Error 1.53e-07 1.50e-07 2.65e-07 5.66e-06 5.37e-07 5.62e-06   erg/cm2
Peak flux Cutoff-PL 1.26e-04 3.10e-03 7.13e-02 1.85e+01 1.35e+01 1.85e+01   ph/cm2/s
              Error -------- -------- -------- 9.51e+00 8.10e-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    1.131    0.027    -      -           2.26e-02 3.50e-04   32.220 57
CPL   0.977    0.109     428.3  526.5      2.60e-02 1.98e-03   26.490 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.665    0.095    -      -           1.16e-01 6.52e-03   70.060 57
CPL   0.658    0.095    9999.4    0.0      1.17e-01 2.36e-02   70.070 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: 59.840000 sec.
T50 in the 50-300 keV band: 19.072000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  154.512  -12.040  142.472
T90    69.384   -0.664   68.720
T50    25.440    8.504   33.944
Peak    1.000    7.948    8.948

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
  243.9285    14.3985   0.0047    38.3319    43.0422        19.8607083     40.786 TRIG_01054681                 
 
Foreground time interval of the image:
-12.040  13.613 (delta_t =  25.653 [sec])
Background time interval of the image:
-239.688 -12.040 (delta_t = 227.648 [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  -12.040 sec. to  142.472 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13132     ( -0.0270876   0.0269844 )
Norm@50keV  : 2.26312E-02    ( -0.000350687   0.000349993 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   32.22     using 59 bins.
 Reduced chi-squared = 0.565263
# Null hypothesis probability of 9.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 154.5 sec: 2.63362 ( -0.04432  0.04442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.62041e-05 ( -5.25484e-07  5.24809e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -12.040 sec. to  142.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.977445     ( -0.11223   0.105688 )
Epeak [keV] : 428.312      ( -151.283 901.742 )
Norm@50keV  : 2.59879E-02    ( -0.00127949   0.00268712 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   26.49     using 59 bins.
 Reduced chi-squared = 0.473036
# Null hypothesis probability of 1.00e+00 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 154.5 sec: 2.60512 ( -0.04813  0.04836 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.60594e-05 ( -5.36467e-07  5.37037e-07 ) ergs/cm2

Band function

Time interval is from  -12.040 sec. to  142.472 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

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 23.5674  (  )
R^2/D10^2   : 7.21141E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  799.84     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.39e-131 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.108e-06   3.569e-08
25- 50  6.094e-06   1.514e-07
50-150  2.525e-05   4.558e-07
15-150  3.245e-05   5.098e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 11.7195       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  871.78     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.54e-146 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.509e-06   7.493e-08
25- 50  8.673e-06   1.483e-07
50-150  1.902e-05   3.090e-07
15-150  3.220e-05   5.176e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.31645        (-0.609146      0.64135)
R1^2/D10^2  : 0.808238        (-0.149011      0.192933)
kT2 [keV]   : 37.3827        (-2.16517      2.62324)
R2^2/D10^2  : 1.40045E-02    (-0.00274514   0.00303282)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   27.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.99e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.555e-06   1.475e-07
25- 50  7.545e-06   2.325e-07
50-150  2.602e-05   7.262e-07
15-150  3.612e-05   8.575e-07

Peak spectrum fit

Power-law model

Time interval is from    7.948 sec. to    8.948 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.665326     ( -0.0955809   0.0936348 )
Norm@50keV  : 0.116409    ( -0.00654709   0.00649662 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.06     using 59 bins.
 Reduced chi-squared = 1.22912
# Null hypothesis probability of 1.15e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.692270 ( -0.019182  0.43008 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44371e-06 ( -8.19518e-08  8.21335e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    7.948 sec. to    8.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.658243     ( -0.097362   0.0933276 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 0.117346    ( -0.00621124   0.0409666 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.07     using 59 bins.
 Reduced chi-squared = 1.25125
# Null hypothesis probability of 9.78e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 13.5069 ( -0.8248  0.7958 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44451e-06 ( -9.54539e-08  6.21318e-08 ) ergs/cm2

Band function

Time interval is from    7.948 sec. to    8.948 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

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 28.6411  (  )
R^2/D10^2   : 0.240195  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  123.84     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.43e-07 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.170e-08   3.380e-09
25- 50  1.918e-07   1.645e-08
50-150  1.130e-06   8.850e-08
15-150  1.353e-06   9.200e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 49.1917       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  294.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.04e-33 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.225e-07   7.850e-09
25- 50  2.356e-07   2.590e-08
50-150  5.168e-07   1.354e-07
15-150  8.749e-07   1.970e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.6520        (-3.28031      3.06093)
R1^2/D10^2  : 1.44730        (-0.614554      1.44019)
kT2 [keV]   : 68.5691        (-26.8493      -71.9493)
R2^2/D10^2  : 2.04360E-02    (-0.0101615   0.0411632)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.83     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.40e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.725e-08   1.518e-08
25- 50  2.266e-07   5.930e-08
50-150  1.152e-06   4.899e-07
15-150  1.436e-06   5.503e-07

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

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.806162     ( -0.0370019   0.0367172 )
Norm@50keV  : 5.17088E-02    ( -0.00112893   0.00112478 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.04     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.50e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 25.65 sec: 5.94174 ( -0.126391  0.126578 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54594e-05 ( -3.15362e-07  3.15474e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.722541     ( -0.148336   0.11839 )
Epeak [keV] : 998.500      ( -999.834 -999.834 )
Norm@50keV  : 5.57153E-02    ( -0.00468544   0.00767837 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.51e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 25.65 sec: 5.92065 ( -0.13101  0.12892 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54502e-05 ( -3.18291e-07  3.17547e-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)  = 7.29e-06
S(50-100 keV) = 1.33e-05

T90 vs. Hardness ratio plot

T90                                   = 69.3839999437332 sec.
Hardness ratio (energy fluence ratio) = 1.82442

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.80071
Count Ratio (50-100 keV) / (15-25 keV) = 1.86276

Mask shadow pattern

IMX = 5.778535244441950E-01, IMY = -5.396527728179455E-01

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:
-239.688000 -12.040000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5696  35.5188    0.0  49.5   13.4   0.3378   0.6   11.9	Her X-1                       
230.5493  19.3091    2.3  25.6   33.5   1.3517   5.0 ------	UNKNOWN                       
251.7571  43.1883    2.8  49.6    2.9   2.0056   4.2 ------	UNKNOWN

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

Time interval of the image:
-12.040000 13.612600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5696  35.5188    0.0  49.5   13.4  -0.0423  -0.1   11.9	Her X-1                       
243.9285  14.3985    0.3  38.3   43.0  19.8619  40.8 ------	UNKNOWN                       
203.2302 -12.0390    3.0  26.5  140.4   0.8588   3.9 ------	UNKNOWN                       
178.7643  53.0800    3.5  43.5  -64.0   1.7285   3.4 ------	UNKNOWN                       
158.1695  20.0544    2.5  44.3 -117.9   2.2277   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
73.012600 720.022000
720.312000 962.370100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9959 -15.6382    0.6  30.1  110.2  25.0915  20.1    1.0	Sco X-1                       
254.3252  35.2185    8.4  22.8  -45.4  -1.1856  -1.4    9.9	Her X-1                       
268.5353  -1.5375    0.0  29.1   53.4  -1.8837  -1.5   11.3	SW J1753.5-0127               
274.1072 -13.9388    3.9  41.2   64.4   7.5718   3.0    8.3	GX 17+2                       
288.7695  10.8892   12.6  43.8   21.4   1.2665   0.9    3.8	GRS 1915+105                  
299.6203  35.2066    1.6  53.9  -11.1  15.0327   7.1    1.5	Cyg X-1                       
281.8400  44.5264    3.0  44.0  -28.7   5.4389   3.8 ------	UNKNOWN                       
217.5038  37.0600    5.4  32.6 -108.9   3.0868   2.1 ------	UNKNOWN                       
194.6708  30.7475    3.1  47.9 -129.1  13.7120   3.8 ------	UNKNOWN

Plot creation:
Sat Jul 30 06:58:54 EDT 2022