batgrbproduct analysis for trigger=1273071

batgrbproduct Analysis for Trigger=1273071

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): Thu Jun 19 22:17:48 EDT 2025
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1273071
======================================================================

  Trigger: 01273071      Segment: 000

  BAT Trigger Time: 755415378.752   [s; MET]
      Trigger Stop: 755415379.008   [s; MET]
               UTC: 2024-12-09T05:35:44.072300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 155.375872930398   Dec: 6.31605205716822  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.18
     Image Trigger?:     NO
     Rate S/N Ratio:     17.464249196573  [ if not an image trigger ]
     Image S/N Ratio:    8.18

  Flight Position:   [ source = BAT ]
    RA: 155.375872930398   Dec: 6.31605205716822  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 155.365442427258   Dec: 6.34929337060288  [deg; J2000]  
        { 10h 21m 27.7s , +06d 20' 57.5" }
         +/- 2.1042273368478 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.05299949578808 [arcmin] (formal 1-sigma fit error)
    SNR: 10.5089043556603
 
  Angular difference between Flight and Ground position is 2.089221 arcmin
 
  Partial Coding Fraction: 0.6953125    [ including projection effects ]

  Duration
     T90: 0.25599992275238 +/- 0.0905096828275688
        Measured from: -0.0720000267028809
                   to: 0.1839998960495     [s; relative to TRIGTIME]
     T50: 0.127999901771545 +/- 0.0640000104904175
        Measured from: -0.00800001621246338
                   to: 0.119999885559082     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.411999940872192     
                   to: 0.588000059127808     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0720000267028809     
                   to: 0.184000015258789     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.012961   0.024021   0.030454   0.013795
           0.004141   0.004872   0.004917   0.003373 [error]
 Peak      0.005245   0.032075   0.040235   0.020964
           0.007642   0.008409   0.007774   0.006205 [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 4.30e-09 1.04e-08 2.01e-08 9.55e-08 5.45e-08 1.31e-07   erg/cm2
              Error 1.50e-09 2.29e-09 3.83e-09 3.87e-08 1.01e-08 4.07e-08   erg/cm2
Peak flux Power-law 1.42e-01 2.11e-01 2.36e-01 4.97e-01 7.39e-01 1.09e+00   ph/cm2/s
              Error 7.68e-02 7.26e-02 5.52e-02 2.43e-01 1.91e-01 2.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.56e-09 1.09e-08 2.23e-08 4.84e-08 5.48e-08 8.52e-08   erg/cm2
              Error 1.88e-09 2.59e-09 5.33e-09 4.61e-08 1.03e-08 4.72e-08   erg/cm2
Peak flux Cutoff-PL 1.04e-01 2.17e-01 2.68e-01 2.36e-01 7.19e-01 8.25e-01   ph/cm2/s
              Error 9.02e-02 6.23e-02 7.93e-02 2.51e-01 1.92e-01 3.37e-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    1.050    0.284    -      -           2.00e-02 3.68e-03   50.580 57
CPL   0.357    1.203     146.9  -41.9      3.93e-02 6.79e-02   49.560 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.842    0.412    -      -           6.43e-03 1.69e-03   48.510 57
CPL  -0.168    2.018     132.3  -37.5      1.68e-02 9.07e-02   47.620 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: 0.256000 sec.
T50 in the 50-300 keV band: 0.128000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.256   -0.072    0.184
T90     0.256   -0.072    0.184
T50     0.128   -0.008    0.120
Peak    1.000   -0.412    0.588

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
  155.3654     6.3493   0.0183    33.3040     2.2313         0.0858576     10.509 TRIG_01273071                 
 
Foreground time interval of the image:
 -0.072   0.184 (delta_t =   0.256 [sec])
Background time interval of the image:
-51.051  -0.072 (delta_t =  50.979 [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 0.256000

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 0.256000

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 0.256000

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   -0.072 sec. to    0.184 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04966     ( -0.289438   0.278251 )
Norm@50keV  : 2.00266E-02    ( -0.00369314   0.00365912 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.58     using 59 bins.
 Reduced chi-squared = 0.887368
# Null hypothesis probability of 7.13e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 0.256 sec: 2.31294 ( -0.43666  0.43841 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45004e-08 ( -1.01098e-08  1.01142e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.072 sec. to    0.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.357039     ( -1.52659   0.878831 )
Epeak [keV] : 146.921      ( -63.1751 -146.92 )
Norm@50keV  : 3.92575E-02    ( -0.0219367   0.113816 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.56     using 59 bins.
 Reduced chi-squared = 0.885
# Null hypothesis probability of 7.16e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 0.256 sec: 2.28396 ( -0.44  0.44188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.46675e-08 ( -1.03424e-08  1.02826e-08 ) ergs/cm2

Band function

Time interval is from   -0.072 sec. to    0.184 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]    : 23.1282  (-4.53707  6.00318)
R^2/D10^2   : 7.42661E-02  (-0.0390346   0.0753084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.27e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.838e-09   6.973e-10
25- 50  1.000e-08   3.045e-09
50-150  3.996e-08   1.242e-08
15-150  5.180e-08   1.443e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-45.7302      -200)
Norm        : 9.62162       (-1.8118     1.8118)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.26     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.93e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.133e-09   3.575e-09
25- 50  1.180e-08   6.834e-09
50-150  2.587e-08   1.512e-08
15-150  4.381e-08   2.509e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.0417        (-10.3102      85.9838)
R1^2/D10^2  : 0.365460        (-0.338241      0.80407)
kT2 [keV]   : 34.6728        (-34.6888      -34.689)
R2^2/D10^2  : 1.57735E-02    (-0.00787268   0.0744239)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.70e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.077e-09   1.870e-09
25- 50  1.128e-08   6.884e-09
50-150  4.035e-08   2.088e-08
15-150  5.471e-08   2.720e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.412 sec. to    0.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.842147     ( -0.439454   0.383891 )
Norm@50keV  : 6.43494E-03    ( -0.00172921   0.00165948 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.51     using 59 bins.
 Reduced chi-squared = 0.851053
# Null hypothesis probability of 7.81e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.738763 ( -0.18918  0.192275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.39061e-08 ( -1.75034e-08  1.75073e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.412 sec. to    0.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.168230     ( -2.72819   1.30795 )
Epeak [keV] : 132.255      ( -57.1582 -132.257 )
Norm@50keV  : 1.68449E-02    ( -0.0168444   0.164646 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.62     using 59 bins.
 Reduced chi-squared = 0.850357
# Null hypothesis probability of 7.80e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.718602 ( -0.189519  0.195136 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.24086e-08 ( -1.86559e-08  1.80917e-08 ) ergs/cm2

Band function

Time interval is from   -0.412 sec. to    0.588 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]    : 24.6594  (-6.07675  10.2939)
R^2/D10^2   : 2.01299E-02  (-0.0133096   0.0298756)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.82e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.142e-09   1.182e-09
25- 50  1.207e-08   6.162e-09
50-150  5.451e-08   2.571e-08
15-150  6.871e-08   2.665e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-58.6938      -200)
Norm        : 3.12343       (-0.805023     0.805023)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.56e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.777e-09   4.775e-09
25- 50  1.496e-08   8.815e-09
50-150  3.281e-08   2.004e-08
15-150  5.555e-08   3.406e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.287441        (-0.361061      199.639)
R1^2/D10^2  : 2.15347E+18        (-2.22936e+18      4.99999e+23)
kT2 [keV]   : 24.9758        (-6.17977      10.5993)
R2^2/D10^2  : 1.92492E-02    (-0.0127926   0.0249025)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.45e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.151e-09   1.159e-09
25- 50  1.210e-08   5.944e-09
50-150  5.440e-08   2.416e-08
15-150  6.865e-08   2.939e-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: 1.04966     ( -0.289438   0.278251 )
Norm@50keV  : 2.00266E-02    ( -0.00369314   0.00365912 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.13e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 0.256 sec: 2.31298 ( -0.436674  0.438345 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.44934e-08 ( -1.01074e-08  1.01233e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.357046     ( -1.52659   0.878819 )
Epeak [keV] : 146.921      ( -63.1751 -146.92 )
Norm@50keV  : 3.92573E-02    ( -0.0219367   0.113816 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.16e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 0.256 sec: 2.28390 ( -0.43945  0.44196 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.46941e-08 ( -1.03473e-08  1.02956e-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)  = 1.04e-08
S(50-100 keV) = 2.01e-08

T90 vs. Hardness ratio plot

T90                                   = 0.25599992275238 sec.
Hardness ratio (energy fluence ratio) = 1.93269

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.85333
Count Ratio (50-100 keV) / (15-25 keV) = 2.34966

Mask shadow pattern

IMX = 6.564799123820915E-01, IMY = -2.557807202558693E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

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:
-51.051400 -0.072000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 93.4828  69.7761    2.3  48.6  136.4   2.4014   5.1 ------	UNKNOWN                       
137.6329  46.3023    2.3  22.4  102.8   0.6419   5.1 ------	UNKNOWN                       
138.2111  36.4430    2.6  22.2   76.7   0.5478   4.5 ------	UNKNOWN                       
160.5510 -16.9668    3.9  55.4  -11.0   0.9466   3.0 ------	UNKNOWN

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

Time interval of the image:
-0.072000 0.184000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
110.3697  81.4289    2.7  47.4  152.9   0.0799   4.3 ------	UNKNOWN                       
155.3655   6.3493    1.1  33.3    2.2   0.0858  10.5 ------	UNKNOWN                       
214.1874  26.4534    2.3  41.8 -105.8   0.1515   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
89.748600 962.307800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5290 -40.5481    1.3  50.3   -2.3  14.8192   8.8    0.4	Vela X-1                      
143.3480 -46.7349    2.4  54.1  -11.7  11.0675   4.7 ------	UNKNOWN                       
177.3465  -8.1024    2.7  26.2  -78.9   5.5209   4.3 ------	UNKNOWN

Plot creation:
Fri Jun 20 02:02:43 EDT 2025