batgrbproduct analysis for trigger=1203197

batgrbproduct Analysis for Trigger=1203197

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Wed Dec 20 09:54:34 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1203197/GCN5_download_cron
======================================================================

  Trigger: 01203197      Segment: 000

  BAT Trigger Time: 724697952   [s; MET]
      Trigger Stop: 724698280   [s; MET]
               UTC: 2023-12-19T16:58:39.423600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.292501749288   Dec: -15.7981697429747  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    14.05

  Flight Position:   [ source = BAT ]
    RA: 245.292501749288   Dec: -15.7981697429747  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 245.263509879892   Dec: -15.8117148687826  [deg; J2000]  
        { 16h 21m 03.2s , -15d 48' 42.2" }
         +/- 1.97321665966036 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.05542339674674 [arcmin] (formal 1-sigma fit error)
    SNR: 11.5196724916608
 
  Angular difference between Flight and Ground position is 1.860626 arcmin
 
  Partial Coding Fraction: 0.2363281    [ including projection effects ]

  Duration
     T90: 51.3039999008179 +/- 13.5513021598204
        Measured from: 360.648000121117
                   to: 411.952000021935     [s; relative to TRIGTIME]
     T50: 20.4759999513626 +/- 13.2006287116797
        Measured from: 381.512000083923
                   to: 401.988000035286     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 411.128000020981     
                   to: 412.128000020981     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 359.047999978065     
                   to: 414.136000037193     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.058696   0.409396   0.045630  -0.003835
           0.122502   0.130830   0.115773   0.131817 [error]
 Peak      0.067235   0.037434   0.025246   0.034114
           0.018519   0.020157   0.018412   0.020794 [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 4.65e-06 7.25e-07 5.23e-08 4.02e-09 5.43e-06 5.43e-06   erg/cm2
              Error 4.49e-07 1.25e-07 2.25e-08 3.01e-09 4.53e-07 4.53e-07   erg/cm2
Peak flux Power-law 5.10e-01 4.64e-02 1.67e-03 6.24e-05 5.58e-01 5.58e-01   ph/cm2/s
              Error 5.11e-02 7.59e-03 7.03e-04 4.52e-05 5.06e-02 5.06e-02   ph/cm2/s
 
Fluence   Cutoff-PL 4.69e-06 5.18e-07 1.50e-09 1.11e-14 5.21e-06 5.21e-06   erg/cm2
              Error 4.80e-07 1.78e-07 1.29e-08 1.38e-10 4.92e-07 4.92e-07   erg/cm2
Peak flux Cutoff-PL 5.09e-01 3.51e-02 5.42e-05 2.11e-10 5.44e-01 5.44e-01   ph/cm2/s
              Error 5.51e-02 1.08e-02 4.31e-04 2.38e-06 5.50e-02 5.50e-02   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 4.64e-01 6.88e-03 2.23e-05 7.24e-08 4.71e-01 4.71e-01   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    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
The chi2 of BB fit is 39.94 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   55.088  359.048  414.136
T90    51.304  360.648  411.952
T50    20.476  381.512  401.988
Peak    1.000  411.128  412.128

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  245.2635 -15.8117 0.0167   37.5  -67.8      14.1352    11.5  TRIG_01203197       
------------------------------------------
 
Foreground time interval of the image:
  0.000 168.690 (delta_t = 168.690 [sec])
170.000 177.170 (delta_t =   7.170 [sec])
179.000 276.430 (delta_t =  97.430 [sec])
278.000 288.600 (delta_t =  10.600 [sec])
290.000 297.680 (delta_t =   7.680 [sec])
299.000 328.000 (delta_t =  29.000 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from  359.048 sec. to  414.136 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Cutoff power-law model

Time interval is from  359.048 sec. to  414.136 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Band function

Time interval is from  359.048 sec. to  414.136 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Peak spectrum fit

Power-law model

Time interval is from  411.128 sec. to  412.128 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Cutoff power-law model

Time interval is from  411.128 sec. to  412.128 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Band function

Time interval is from  411.128 sec. to  412.128 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
       This script tries to add the systematic column to the PHA
       file before doing the fitting                            
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

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

Power-law model

Cutoff power-law model

Band function

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 7.25e-07
S(50-100 keV) = 5.23e-08

T90 vs. Hardness ratio plot

T90                                   = 51.3039999008179 sec.
Hardness ratio (energy fluence ratio) = 0.0721379

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.198862
Count Ratio (50-100 keV) / (15-25 keV) = 0.0221645

Mask shadow pattern

IMX = 2.900761540058988E-01, IMY = 7.105243525981090E-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:
-17.099400 168.690000
170.000000 177.170000
179.000000 276.430000
278.000000 288.600000
290.000000 297.680000
299.000000 347.650000
349.000000 349.700580
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.1492 -15.6896    7.5  37.3  -67.7   2.1913   1.5   10.2	Sco X-1                       
254.5352  35.2805   10.8  27.3 -176.0  -0.7790  -1.1    5.3	Her X-1                       
268.4552  -1.3753   11.9  42.6 -109.7  -2.8140  -1.0    7.0	SW J1753.5-0127               
184.3407  13.2722    3.3  44.2   46.7   6.6303   3.5 ------	UNKNOWN                       
199.7785  35.3380    2.9  31.6   84.7   5.2684   4.0 ------	UNKNOWN                       
223.4294  47.4033    2.5  29.3  127.3   4.5069   4.7 ------	UNKNOWN                       
240.5352  29.1212    2.4  14.2  176.7   2.9507   4.8 ------	UNKNOWN

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

Time interval of the image:
0.000000 168.690000
170.000000 177.170000
179.000000 276.430000
278.000000 288.600000
290.000000 297.680000
299.000000 328.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.1384 -15.6990    6.4  37.4  -67.7   2.2072   1.8    9.8	Sco X-1                       
254.3065  35.2570    8.9  27.1 -176.2  -0.8233  -1.3    9.0	Her X-1                       
268.4579  -1.3793   12.6  42.6 -109.7  -2.3444  -0.9    7.0	SW J1753.5-0127               
223.4286  47.3971    2.4  29.3  127.3   3.9533   4.8 ------	UNKNOWN                       
240.5384  29.1126    2.4  14.2  176.8   2.6063   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
488.400590 536.620000
538.000000 540.440000
541.000000 541.720000
542.000000 545.530000
547.000000 603.300000
841.000000 890.900000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3256  35.4950    0.0  41.7    0.8  -6.0718  -1.8   11.2	Her X-1                       
268.3526  -1.4549    7.5  31.1  -66.0   4.6846   1.6    0.9	SW J1753.5-0127               
273.9755 -14.0223   14.7  35.7  -89.7   3.9173   0.8    2.0	GX 17+2                       
285.0377 -24.9219   48.1  41.1 -112.5  -1.7901  -0.2    0.1	HT1900.1-2455                 
288.8044  10.7582   20.7   7.4  -70.5  -1.3146  -0.6   11.2	GRS 1915+105                  
299.4664  35.2455    4.5  20.6   64.0  -6.6838  -2.5    6.6	Cyg X-1                       
308.0388  41.0023    6.3  28.4   74.6   6.5446   1.8    4.4	Cyg X-3                       
326.3965  38.3132    6.7  36.1   97.5   9.0689   1.7   10.6	Cyg X-2                       
240.1753  39.2455    2.2  53.5    1.7  36.1746   5.3 ------	UNKNOWN                       
322.3138 -20.7905    2.4  44.7 -163.8  16.3910   4.9 ------	UNKNOWN                       
329.1659 -31.7909    2.4  57.1 -160.9  38.5718   4.8 ------	UNKNOWN                       
278.2870  -7.3739    3.1  27.9  -88.6  11.3083   3.8 ------	UNKNOWN

Plot creation:
Wed Dec 20 09:56:22 EST 2023