batgrbproduct analysis for trigger=1259578

batgrbproduct Analysis for Trigger=1259578

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): Wed Dec 18 16:36:50 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1259578
======================================================================

  Trigger: 01259578      Segment: 000

  BAT Trigger Time: 750247548.736   [s; MET]
      Trigger Stop: 750247549.12   [s; MET]
               UTC: 2024-10-10T10:05:14.409700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 153.365571303607   Dec: 11.5439734147466  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.61
     Image Trigger?:     NO
     Rate S/N Ratio:     45.7055795281058  [ if not an image trigger ]
     Image S/N Ratio:    11.61

  Flight Position:   [ source = BAT ]
    RA: 153.365571303607   Dec: 11.5439734147466  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 153.367271247701   Dec: 11.5444831246222  [deg; J2000]  
        { 10h 13m 28.1s , +11d 32' 40.1" }
         +/- 1.12542594297902 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.349254973627704 [arcmin] (formal 1-sigma fit error)
    SNR: 25.6926257720387
 
  Angular difference between Flight and Ground position is 0.104508 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 30.8559999465942 +/- 1.3583579003067
        Measured from: 0.228000044822693
                   to: 31.0839999914169     [s; relative to TRIGTIME]
     T50: 23.2239998579025 +/- 0.661694745641074
        Measured from: 4.04800009727478
                   to: 27.2719999551773     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0399999618530273     
                   to: 0.960000038146973     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0439999103546143     
                   to: 35.1240000724792     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.211203   1.364864   0.795535   0.154665
           0.040986   0.042315   0.035481   0.027820 [error]
 Peak      0.131503   0.205298   0.146440   0.039365
           0.008725   0.009958   0.008936   0.006347 [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 3.94e-07 5.73e-07 6.26e-07 1.27e-06 1.98e-06 2.87e-06   erg/cm2
              Error 2.66e-08 2.30e-08 3.59e-08 1.57e-07 8.31e-08 1.85e-07   erg/cm2
Peak flux Power-law 1.40e+00 1.42e+00 1.02e+00 1.16e+00 4.30e+00 5.00e+00   ph/cm2/s
              Error 1.36e-01 8.59e-02 7.17e-02 1.67e-01 2.46e-01 2.84e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.80e-07 5.84e-07 6.30e-07 9.39e-07 1.95e-06 2.53e-06   erg/cm2
              Error 3.23e-08 2.73e-08 3.73e-08 3.54e-07 9.62e-08 3.77e-07   erg/cm2
Peak flux Cutoff-PL 1.34e+00 1.46e+00 1.04e+00 8.62e-01 4.26e+00 4.70e+00   ph/cm2/s
              Error 1.60e-01 1.02e-01 8.09e-02 3.04e-01 2.53e-01 4.38e-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    1.878    0.076    -      -           6.14e-03 2.57e-04   51.010 57
CPL   1.683    0.276      78.5  -27.1      7.73e-03 2.29e-03   49.660 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.483    0.096    -      -           3.46e-02 1.97e-03   50.540 57
CPL   1.227    0.348     152.5  -44.0      4.66e-02 1.99e-02   49.130 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: 29.120000 sec.
T50 in the 50-300 keV band: 22.080000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   35.168   -0.044   35.124
T90    30.856    0.228   31.084
T50    23.224    4.048   27.272
Peak    1.000   -0.040    0.960

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
  153.3673    11.5445   0.0075    29.0121   -13.7398         1.3219394     25.693 TRIG_01259578                 
 
Foreground time interval of the image:
 -0.044  15.365 (delta_t =  15.409 [sec])
Background time interval of the image:
-239.736  -0.044 (delta_t = 239.692 [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 0.384000

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 0.384000

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 0.384000

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   -0.044 sec. to   35.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87833     ( -0.0751384   0.0760284 )
Norm@50keV  : 6.13812E-03    ( -0.000257712   0.000256369 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.01     using 59 bins.
 Reduced chi-squared = 0.894912
# Null hypothesis probability of 6.98e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 35.17 sec: 0.872944 ( -0.036361  0.036474 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98487e-06 ( -8.29949e-08  8.32797e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.044 sec. to   35.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68261     ( -0.305137   0.247448 )
Epeak [keV] : 78.4550      ( -24.1809 -78.4581 )
Norm@50keV  : 7.73174E-03    ( -0.00130435   0.00326611 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.66     using 59 bins.
 Reduced chi-squared = 0.886786
# Null hypothesis probability of 7.12e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 35.17 sec: 0.861299 ( -0.039917  0.040019 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95129e-06 ( -9.62979e-08  9.60598e-08 ) ergs/cm2

Band function

Time interval is from   -0.044 sec. to   35.124 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]    : 12.1965  (  )
R^2/D10^2   : 0.184643  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  204.57     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.67e-18 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.046e-07   1.570e-08
25- 50  6.561e-07   3.077e-08
50-150  5.931e-07   5.346e-08
15-150  1.454e-06   6.436e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 94.7635       (-12.9891      16.5704)
Norm        : 3.81765       (-0.235287     0.257117)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.76     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.97e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.508e-07   2.780e-08
25- 50  5.999e-07   2.726e-08
50-150  9.423e-07   2.506e-07
15-150  1.893e-06   2.640e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.66392        (-0.845241      0.881802)
R1^2/D10^2  : 1.28876        (-0.453486      0.830497)
kT2 [keV]   : 23.9867        (-3.41083      4.90058)
R2^2/D10^2  : 1.08307E-02    (-0.00539699   0.00896281)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.77e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.453e-07   4.423e-08
25- 50  5.967e-07   6.049e-08
50-150  9.784e-07   1.609e-07
15-150  1.920e-06   2.638e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.040 sec. to    0.960 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48252     ( -0.0954366   0.0959677 )
Norm@50keV  : 3.45746E-02    ( -0.00197553   0.00196781 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.54     using 59 bins.
 Reduced chi-squared = 0.886667
# Null hypothesis probability of 7.14e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 4.29640 ( -0.24606  0.24628 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.28996e-07 ( -2.04784e-08  2.05707e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.040 sec. to    0.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22703     ( -0.39606   0.300703 )
Epeak [keV] : 152.542      ( -64.4811 -152.547 )
Norm@50keV  : 4.66035E-02    ( -0.0132779   0.0266015 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.13     using 59 bins.
 Reduced chi-squared = 0.877321
# Null hypothesis probability of 7.31e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 4.25644 ( -0.25266  0.25264 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.23437e-07 ( -2.22543e-08  2.20964e-08 ) ergs/cm2

Band function

Time interval is from   -0.040 sec. to    0.960 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]    : 14.7113  (  )
R^2/D10^2   : 0.524591  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  122.65     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.04e-06 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.384e-08   2.605e-09
25- 50  9.303e-08   6.505e-09
50-150  1.358e-07   1.685e-08
15-150  2.527e-07   1.720e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-29.394      -200)
Norm        : 17.6162       (-0.985257     0.985257)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.64     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.11e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.401e-08   2.710e-09
25- 50  8.466e-08   5.330e-09
50-150  1.857e-07   1.255e-08
15-150  3.143e-07   2.340e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.68051        (-1.36337      1.45207)
R1^2/D10^2  : 2.40216        (-0.890918      1.65267)
kT2 [keV]   : 36.2426        (-9.12897      23.3045)
R2^2/D10^2  : 1.73538E-02    (-0.0129454   0.0290834)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.18e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.770e-08   7.115e-09
25- 50  9.018e-08   1.472e-08
50-150  1.991e-07   8.424e-08
15-150  3.270e-07   9.525e-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: 1.77913     ( -0.111984   0.113903 )
Norm@50keV  : 5.39868E-03    ( -0.00036844   0.000365067 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   68.74     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.37e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 15.41 sec: 0.737994 ( -0.0466692  0.0467223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.66524e-07 ( -5.35739e-08  5.39684e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56114     ( -0.469968   0.310265 )
Epeak [keV] : 92.4819      ( -36.7304 -92.4959 )
Norm@50keV  : 7.08403E-03    ( -0.0018429   0.00552593 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.31e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 15.41 sec: 0.730595 ( -0.02446  0.048752 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.51279e-07 ( -6.19636e-08  6.06846e-08 ) 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)  = 5.73e-07
S(50-100 keV) = 6.26e-07

T90 vs. Hardness ratio plot

T90                                   = 30.8559999465942 sec.
Hardness ratio (energy fluence ratio) = 1.0925

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.12687
Count Ratio (50-100 keV) / (15-25 keV) = 0.656814

Mask shadow pattern

IMX = 5.387142560627157E-01, IMY = 1.317210281828195E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000

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:
-239.736000 -0.044000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

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

Time interval of the image:
-0.044000 15.364590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
147.4213  71.7921    2.5  34.9  129.6   0.3892   4.6 ------	UNKNOWN                       
232.3002  56.8851    1.8  46.2 -176.5   0.5397   6.4 ------	UNKNOWN                       
153.3673  11.5445    0.4  29.0  -13.7   1.3220  25.7 ------	UNKNOWN                       
221.5370  33.5629    2.5  44.4 -141.9   0.4452   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
85.164590 764.264600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5323 -40.5527   90.3  54.6   -4.5   0.1782   0.1    0.2	Vela X-1                      
163.2357  14.7455    2.8  10.1 -130.6   3.2659   4.1 ------	UNKNOWN                       
160.2727 -45.1162    3.1  57.0  -26.9  12.8050   3.7 ------	UNKNOWN

Plot creation:
Wed Dec 18 17:44:44 EST 2024