batgrbproduct analysis for trigger=1222955

batgrbproduct Analysis for Trigger=1222955

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): Sat Oct 19 15:27:17 EDT 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1222955
======================================================================

  Trigger: 01222955      Segment: 000

  BAT Trigger Time: 735184114.432   [s; MET]
      Trigger Stop: 735184118.528   [s; MET]
               UTC: 2024-04-19T01:48:01.136900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 94.567774527607   Dec: -45.0114988670489  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.72
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6770782520313  [ if not an image trigger ]
     Image S/N Ratio:    6.72

  Flight Position:   [ source = BAT ]
    RA: 94.567774527607   Dec: -45.0114988670489  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 94.550620947569   Dec: -44.9724485243922  [deg; J2000]  
        { 06h 18m 12.1s , -44d 58' 20.8" }
         +/- 3.17399359839268 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.50069880572916 [arcmin] (formal 1-sigma fit error)
    SNR: 5.84168740330559
 
  Angular difference between Flight and Ground position is 2.453474 arcmin
 
  Partial Coding Fraction: 0.9140625    [ including projection effects ]

  Duration
     T90: 114.256000041962 +/- 33.1346464522303
        Measured from: -72.7240000963211
                   to: 41.5319999456406     [s; relative to TRIGTIME]
     T50: 57.8159999847412 +/- 36.7354086676877
        Measured from: -56.0760000944138
                   to: 1.73999989032745     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.351999998092651     
                   to: 1.35199999809265     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -74.0360000133514     
                   to: 46.3679999113083     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.373640   0.339501   0.329486   0.061960
           0.061390   0.063357   0.054870   0.048572 [error]
 Peak      0.023119   0.030964   0.030304   0.005122
           0.005891   0.006361   0.005499   0.004659 [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 9.85e-08 1.66e-07 2.12e-07 5.47e-07 6.28e-07 1.02e-06   erg/cm2
              Error 2.59e-08 2.70e-08 5.50e-08 3.03e-07 1.27e-07 3.51e-07   erg/cm2
Peak flux Power-law 2.08e-01 2.29e-01 1.80e-01 2.33e-01 7.03e-01 8.49e-01   ph/cm2/s
              Error 7.05e-02 4.81e-02 4.34e-02 1.17e-01 1.37e-01 1.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.98e-08 1.29e-07 2.11e-07 6.13e-07 6.27e-07 1.01e-06   erg/cm2
              Error 2.62e-08 3.45e-08 6.87e-08 2.60e-07 1.27e-07 2.81e-07   erg/cm2
Peak flux Cutoff-PL 1.97e-01 2.35e-01 1.85e-01 1.72e-01 6.96e-01 7.89e-01   ph/cm2/s
              Error 8.24e-02 5.51e-02 4.93e-02 1.31e-01 1.41e-01 2.17e-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    1.643    0.321    -      -           5.60e-04 1.04e-04   82.290 57
CPL   1.647    0.323    9999.4   -0.0      5.60e-04 4.30e-04   82.290 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.348    0.338    -      -           5.84e-03 1.14e-03   53.760 57
CPL   1.079    1.576     178.7    0.0      7.92e-03 1.82e-02   53.620 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: 115.264000 sec.
T50 in the 50-300 keV band: 47.040000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  120.404  -74.036   46.368
T90   114.256  -72.724   41.532
T50    57.816  -56.076    1.740
Peak    1.000    0.352    1.352

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
   94.5506   -44.9724   0.0329    11.7149    65.6685         0.8689872      5.842 TRIG_01222955                 
 
Foreground time interval of the image:
-74.036  46.368 (delta_t = 120.404 [sec])
Background time interval of the image:
-239.432 -74.036 (delta_t = 165.396 [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  -74.036 sec. to   46.368 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64309     ( -0.312282   0.329535 )
Norm@50keV  : 5.60273E-04    ( -0.000106256   0.000101947 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   82.29     using 59 bins.
 Reduced chi-squared = 1.44368
# Null hypothesis probability of 1.58e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 120.4 sec: 7.29948E-02 ( -0.0118604  0.0118661 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.27894e-07 ( -1.25359e-07  1.28828e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -74.036 sec. to   46.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64708     ( -0.319284   0.326613 )
Epeak [keV] : 9999.36      ( -9999.35 -9999.36 )
Norm@50keV  : 5.60435E-04    ( -0.000106027   0.000754743 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   82.29     using 59 bins.
 Reduced chi-squared = 1.46946
# Null hypothesis probability of 1.26e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 120.4 sec: 7.31360E-02 ( -0.0120862  0.0118175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.2762e-07 ( -1.24969e-07  1.28876e-07 ) ergs/cm2

Band function

Time interval is from  -74.036 sec. to   46.368 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]    : 13.2445  (-3.02385  4.01526)
R^2/D10^2   : 1.20181E-02  (-0.00717431   0.0181648)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   98.27     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.63e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.381e-08   1.866e-08
25- 50  1.891e-07   5.621e-08
50-150  2.119e-07   8.648e-08
15-150  4.548e-07   1.134e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 181.995       (-102.294      -178.882)
Norm        : 0.294794       (-0.0492605     0.0672064)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   83.51     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.26e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.939e-08   4.970e-08
25- 50  1.701e-07   9.271e-08
50-150  3.615e-07   2.029e-07
15-150  6.210e-07   3.512e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.57821        (-1.71421      2.53109)
R1^2/D10^2  : 0.457904        (-0.376016      4.00487)
kT2 [keV]   : 23.5541        (-7.36476      20.4354)
R2^2/D10^2  : 1.38462E-03    (-0.00118203   0.00493276)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   81.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.08e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.095e-07   6.218e-08
25- 50  1.396e-07   7.471e-08
50-150  3.783e-07   2.289e-07
15-150  6.274e-07   3.392e-07

Peak spectrum fit

Power-law model

Time interval is from    0.352 sec. to    1.352 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34787     ( -0.337288   0.338771 )
Norm@50keV  : 5.83821E-03    ( -0.00114738   0.00113923 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.76     using 59 bins.
 Reduced chi-squared = 0.943158
# Null hypothesis probability of 5.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.703038 ( -0.137045  0.137272 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.70545e-08 ( -1.25207e-08  1.27286e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.352 sec. to    1.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07922     ( -1.52381   1.62878 )
Epeak [keV] : 178.730      ( -178.736 -178.736 )
Norm@50keV  : 7.91940E-03    ( -0.00318135   0.0332519 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.62     using 59 bins.
 Reduced chi-squared = 0.9575
# Null hypothesis probability of 5.66e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.696168 ( -0.141238  0.140436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.6119e-08 ( -1.32691e-08  1.32427e-08 ) ergs/cm2

Band function

Time interval is from    0.352 sec. to    1.352 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]    : 17.3230  (-3.87094  5.32097)
R^2/D10^2   : 5.07662E-02  (-0.0301149   0.0688559)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.91e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.086e-09   1.113e-09
25- 50  1.386e-08   5.137e-09
50-150  2.987e-08   1.199e-08
15-150  4.681e-08   1.794e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-86.0241      -199.363)
Norm        : 2.89139       (-0.55928     0.560591)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.70     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.62e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.200e-09   4.279e-09
25- 50  1.385e-08   7.985e-09
50-150  3.037e-08   1.754e-08
15-150  5.142e-08   2.955e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.65487        (-3.13669      6.14429)
R1^2/D10^2  : 2.74317        (-2.57472      15.8932)
kT2 [keV]   : 22.8081        (-6.40331      21.4538)
R2^2/D10^2  : 1.80371E-02    (-0.0161985   0.0116148)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.00     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.51e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.674e-09   3.829e-09
25- 50  1.193e-08   6.445e-09
50-150  3.591e-08   2.128e-08
15-150  5.451e-08   2.946e-08

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: 1.64309     ( -0.312282   0.329535 )
Norm@50keV  : 5.60273E-04    ( -0.000106256   0.000101947 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   82.29     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.58e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 120.4 sec: 7.29921E-02 ( -0.0118598  0.0118654 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.27814e-07 ( -1.25297e-07  1.28812e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.18811     ( -1.19592   0.0717652 )
Epeak [keV] : 71.2484      (   )
Norm@50keV  : 2.98076E-04    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   81.94     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.35e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 120.4 sec: 7.30414E-02 ( -0.0119291  0.0118255 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.28151e-07 ( -1.25562e-07  1.25203e-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)  = 1.66e-07
S(50-100 keV) = 2.12e-07

T90 vs. Hardness ratio plot

T90                                   = 114.256000041962 sec.
Hardness ratio (energy fluence ratio) = 1.27711

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.908631
Count Ratio (50-100 keV) / (15-25 keV) = 0.881827

Mask shadow pattern

IMX = 8.543604536943343E-02, IMY = -1.889426024036979E-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:
-239.432000 -74.036000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
117.2377  -8.7938    2.8  49.6   25.5   3.4472   4.1 ------	UNKNOWN

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

Time interval of the image:
-74.036000 46.368000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
356.1776 -78.6088    2.3  44.5  166.4   1.2992   5.0 ------	UNKNOWN                       
 94.5506 -44.9724    2.0  11.7   65.7   0.8691   5.8 ------	UNKNOWN                       
330.4099 -69.0378    1.7  54.2  175.1   3.7146   7.0 ------	UNKNOWN                       
 83.5548 -24.5412    2.4  21.0  -15.5   0.7280   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
92.668600 962.697600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4105 -40.5133    6.8  30.0   71.9   3.6318   1.7    5.9	Vela X-1                      
134.3064 -39.3663    2.7  29.7   69.1   8.4790   4.3 ------	UNKNOWN                       
 90.0900 -12.1545    2.2  33.1  -32.2   6.3907   5.1 ------	UNKNOWN

Plot creation:
Sat Oct 19 18:29:21 EDT 2024