batgrbproduct analysis for trigger=1290305

batgrbproduct Analysis for Trigger=1290305

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 Jun 20 17:29:13 EDT 2025
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1290305
======================================================================

  Trigger: 01290305      Segment: 000

  BAT Trigger Time: 761801712.192   [s; MET]
      Trigger Stop: 761801714.24   [s; MET]
               UTC: 2025-02-21T03:34:37.076040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 59.4766170518887   Dec: -15.1387040573162  [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:     22.7156333832011  [ if not an image trigger ]
     Image S/N Ratio:    10.54

  Flight Position:   [ source = BAT ]
    RA: 59.4766170518887   Dec: -15.1387040573162  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 59.4757486909577   Dec: -15.135824739688  [deg; J2000]  
        { 03h 57m 54.2s , -15d 08' 09.0" }
         +/- 1.87833796411089 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.811285701197408 [arcmin] (formal 1-sigma fit error)
    SNR: 12.3598455084786
 
  Angular difference between Flight and Ground position is 0.179931 arcmin
 
  Partial Coding Fraction: 0.1972656    [ including projection effects ]

  Duration
     T90: 1.79999995231628 +/- 0.30841529631772
        Measured from: -0.136000037193298
                   to: 1.66399991512299     [s; relative to TRIGTIME]
     T50: 0.879999876022339 +/- 0.235185044842754
        Measured from: 0.351999998092651
                   to: 1.23199987411499     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.424000024795532     
                   to: 1.42400002479553     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.220000028610229     
                   to: 1.84399998188019     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.143534   0.202021   0.196426   0.044810
           0.024026   0.027180   0.024398   0.020026 [error]
 Peak      0.080075   0.112870   0.138871   0.019229
           0.016928   0.019597   0.018122   0.013810 [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 4.89e-08 9.43e-08 1.41e-07 4.56e-07 3.98e-07 7.41e-07   erg/cm2
              Error 1.14e-08 1.34e-08 2.36e-08 1.66e-07 5.82e-08 1.83e-07   erg/cm2
Peak flux Power-law 8.49e-01 9.41e-01 7.45e-01 9.75e-01 2.90e+00 3.51e+00   ph/cm2/s
              Error 2.41e-01 1.70e-01 1.40e-01 3.65e-01 4.82e-01 5.79e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.75e-08 9.58e-08 1.43e-07 3.69e-07 3.94e-07 6.56e-07   erg/cm2
              Error 1.24e-08 1.54e-08 2.62e-08 1.88e-07 6.06e-08 2.00e-07   erg/cm2
Peak flux Cutoff-PL 5.88e-01 1.01e+00 8.78e-01 3.86e-01 2.74e+00 2.86e+00   ph/cm2/s
              Error 3.13e-01 2.04e-01 1.90e-01 3.37e-01 5.08e-01 6.17e-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    1.418    0.229    -      -           2.00e-02 2.66e-03   45.640 57
CPL   1.273    1.180     260.7    0.0      2.36e-02 3.27e-02   45.570 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.337    0.259    -      -           2.41e-02 3.90e-03   50.680 57
CPL  -0.051    1.425      84.8   77.3      9.99e-02 2.26e-01   46.500 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: 2.304000 sec.
T50 in the 50-300 keV band: 1.152000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.064   -0.220    1.844
T90     1.800   -0.136    1.664
T50     0.880    0.352    1.232
Peak    1.000    0.424    1.424

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
   59.4757   -15.1358   0.0156    40.2471   -59.5840         0.6253832     12.360 TRIG_01290305                 
 
Foreground time interval of the image:
 -0.220   1.844 (delta_t =   2.064 [sec])
Background time interval of the image:
-194.491  -0.220 (delta_t = 194.271 [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 2.048000

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 2.048000

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 2.048000

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   -0.220 sec. to    1.844 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41801     ( -0.229011   0.22981 )
Norm@50keV  : 2.00056E-02    ( -0.00266355   0.00265496 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.64     using 59 bins.
 Reduced chi-squared = 0.800702
# Null hypothesis probability of 8.60e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 2.064 sec: 2.44650 ( -0.33155  0.33247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97595e-07 ( -5.79303e-08  5.8379e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.220 sec. to    1.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27291     ( -0.998392   1.36152 )
Epeak [keV] : 260.707      ( -266.328 -266.328 )
Norm@50keV  : 2.35518E-02    ( -0.0194291   0.0458727 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.57     using 59 bins.
 Reduced chi-squared = 0.81375
# Null hypothesis probability of 8.39e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 2.064 sec: 2.43319 ( -0.3423  0.33308 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94511e-07 ( -6.14989e-08  5.96395e-08 ) ergs/cm2

Band function

Time interval is from   -0.220 sec. to    1.844 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]    : 17.0339  (-2.6673  3.25392)
R^2/D10^2   : 0.182816  (-0.0828602   0.146547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.05     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.01e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.229e-08   6.290e-09
25- 50  9.876e-08   2.055e-08
50-150  2.047e-07   4.926e-08
15-150  3.258e-07   6.398e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-63.5338      -200)
Norm        : 10.1155       (-1.33445     1.33445)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.31e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.199e-08   2.938e-08
25- 50  1.000e-07   5.538e-08
50-150  2.194e-07   1.233e-07
15-150  3.714e-07   2.040e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.93354        (-2.00262      3.451)
R1^2/D10^2  : 8.16973        (-6.98152      89.0001)
kT2 [keV]   : 22.7709        (-4.84845      10.6036)
R2^2/D10^2  : 5.97389E-02    (-0.0444793   0.0817335)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.26     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.23e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.050e-08   2.680e-08
25- 50  8.736e-08   3.625e-08
50-150  2.443e-07   1.299e-07
15-150  3.821e-07   1.489e-07

Peak spectrum fit

Power-law model

Time interval is from    0.424 sec. to    1.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33719     ( -0.257948   0.260136 )
Norm@50keV  : 2.41030E-02    ( -0.0039001   0.00389427 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.68     using 59 bins.
 Reduced chi-squared = 0.889123
# Null hypothesis probability of 7.10e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.89622 ( -0.48126  0.48291 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.36118e-07 ( -4.12009e-08  4.15015e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.424 sec. to    1.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -5.13541E-02     ( -1.66889   1.18114 )
Epeak [keV] : 84.7899      ( -19.6206 135.047 )
Norm@50keV  : 9.98790E-02    ( -0.0998791   0.351531 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.50     using 59 bins.
 Reduced chi-squared = 0.830357
# Null hypothesis probability of 8.13e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.74153 ( -0.51078  0.50578 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.49415e-08 ( -4.40135e-08  1.71666e-08 ) ergs/cm2

Band function

Time interval is from    0.424 sec. to    1.424 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]    : 19.0576  (-2.93604  3.54623)
R^2/D10^2   : 0.161623  (-0.0715145   0.122873)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.04     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.95e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.153e-08   3.816e-09
25- 50  5.555e-08   1.593e-08
50-150  1.484e-07   4.723e-08
15-150  2.154e-07   5.260e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-64.5192      -200)
Norm        : 12.1239       (-1.96233     1.96233)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.87e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.019e-08   1.731e-08
25- 50  5.808e-08   3.310e-08
50-150  1.274e-07   7.100e-08
15-150  2.156e-07   1.212e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.01849        (-2.28189      3.98854)
R1^2/D10^2  : 16.4562        (-15.5616      2377.55)
kT2 [keV]   : 21.1669        (-3.64331      5.12137)
R2^2/D10^2  : 0.106307    (-0.0576333   0.0624676)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.04     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.79e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.427e-08   1.258e-08
25- 50  5.192e-08   2.011e-08
50-150  1.548e-07   7.405e-08
15-150  2.310e-07   8.769e-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: 1.41801     ( -0.229011   0.22981 )
Norm@50keV  : 2.00056E-02    ( -0.00266355   0.00265496 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.64     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.60e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 2.064 sec: 2.44646 ( -0.331538  0.332444 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97547e-07 ( -5.79262e-08  5.83965e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26594     ( -1.00665   0.371925 )
Epeak [keV] : 235.055      ( -265.861 -265.861 )
Norm@50keV  : 2.36779E-02    ( -0.00605764   0.0458433 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.61     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.38e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 2.064 sec: 2.43291 ( -0.3422  0.33525 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94666e-07 ( -6.15278e-08  6.05309e-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)  = 9.43e-08
S(50-100 keV) = 1.41e-07

T90 vs. Hardness ratio plot

T90                                   = 1.79999995231628 sec.
Hardness ratio (energy fluence ratio) = 1.49523

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.40748
Count Ratio (50-100 keV) / (15-25 keV) = 1.3685

Mask shadow pattern

IMX = 4.285496407615806E-01, IMY = 7.299776838040873E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-194.491400 -0.220000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6311  22.0258    0.8  43.8    8.4   6.8711  13.9    0.7	Crab                          
135.5592 -40.6044    2.5  36.8  167.3   1.8880   4.5    3.3	Vela X-1                      
154.1997 -62.0998    2.3  57.0 -173.8   5.7641   5.0 ------	UNKNOWN                       
 61.7114 -42.5922    2.3  41.5 -102.2   6.9574   5.0 ------	UNKNOWN

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

Time interval of the image:
-0.220000 1.844000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6753  21.9164    3.7  43.7    8.3   0.0982   3.1    6.3	Crab                          
135.2866 -40.5495    0.0  36.6  167.4  -0.0341  -1.4   11.0	Vela X-1                      
133.9363 -66.4516    2.6  52.7 -163.1   0.2456   4.5 ------	UNKNOWN                       
 59.4758 -15.1358    0.9  40.2  -59.6   0.6254  12.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
105.908580 903.048000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6382  22.0310    0.9  44.1   42.1  19.3005  13.3    1.0	Crab                          
 88.1215 -65.6299    2.5  54.0  174.9   9.8678   4.6 ------	UNKNOWN                       
 16.4254 -25.2517    3.1  41.5 -102.1  12.3747   3.7 ------	UNKNOWN

Plot creation:
Fri Jun 20 17:35:25 EDT 2025