Difference between revisions of "GRB230512A"

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(Created page with "Go back to Transient Working Group. == Alert Information == * '''Name/type of the alert''': Name * '''GCN notice''': ''link'' * '''Triggered by''': ''e.g., Swift, Fermi...")
 
 
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Go back to [[Transient Working Group]].
 
Go back to [[Transient Working Group]].
  
 +
Go back to [[Transient observation logbook]].
  
 
== Alert Information ==
 
== Alert Information ==
  
 
* '''Name/type of the alert''': Name
 
* '''Name/type of the alert''': Name
−
* '''GCN notice''': ''link''
+
* '''GCN notice''': ''https://gcn.nasa.gov/circulars/33778''
−
* '''Triggered by''': ''e.g., Swift, Fermi/LAT...''
+
* '''Triggered by''': ''Fermi GBM (but alert from TH by Fermi-LAT)''
−
* '''Alert coordinates''':
+
* '''Alert coordinates (From Fermi-LAT)''':
−
** ''RA: XX XX XX.XX (hh mm ss), Dec: +/-YY YY YY.YY (dd mm ss)''
+
** ''RA: 19 41 36.00 (hh mm ss), Dec: +38 24 00.00 (dd mm ss)''
−
** ''RA, Dec in deg (ICRS): XX.XX, YY.YY''
+
** ''RA, Dec in deg (ICRS): 295.4, 38.4''
−
* '''Alert arrival time''': ''UTC''
+
* '''Alert arrival time''': ''06:27:45 UT''
 
* '''Other relevant information''':
 
* '''Other relevant information''':
−
** Redshift (z):
+
** Redshift (z): n/a
  
 
==Multi-wavelength Observations==
 
==Multi-wavelength Observations==
Line 25: Line 26:
 
!Link
 
!Link
 
|-
 
|-
−
| -
+
| 0-300 s after the GBM trigger
−
|
+
| Fermi-LAT
−
|style="color:#0000FF" | Initial detection
+
| style="color:#00BA00" | Detection
−
|
+
| (1.0 ± 0.3) E-05 ph/cm2/s
−
|
+
| The highest-energy photon is a 1.7 GeV
−
|
+
| https://gcn.nasa.gov/circulars/33780
 
|-
 
|-
−
|
+
| 45.5 - 57.3 ks
−
|
+
| Swift-XRT
−
|style="color:#FF0000" | UL
+
|style="color:#FF0000" | No aparent detection
−
|
+
| Nine uncatalogued X-ray sources have been detected
−
|
+
| However none of them is above the RASS limit or shows definitive signs of fading.
−
|
+
| https://gcn.nasa.gov/circulars/33789
 
|-
 
|-
−
|
+
| 2 hours
−
|
+
| Zwicky Transient Facility
−
|style="color:#00BA00" | Detection
+
|style="color:#FF0000" | No aparent detection
−
|
+
| Two sources were found within the 95% localization region
−
|
+
| These are likely unrelated as they fall outside the LAT localization
−
|
+
| https://gcn.nasa.gov/circulars/33784
 +
|-
 +
| 0.57624 d, 1.64044 d
 +
| Kitab
 +
|style="color:#FF0000" | aparent detection
 +
| 19.43, n/d (UL at 20)
 +
| A source disappeared from May 12 to May 13 in the XRT #5 error circle
 +
| https://gcn.nasa.gov/circulars/33796
 +
|-
 +
| 14.22 hours
 +
| GIT
 +
|style="color:#FF0000" | No detection
 +
| >20.39 (r), >21.08 (g')
 +
| 2x400s exposures in the r' and g' band
 +
| https://gcn.nasa.gov/circulars/33797
 +
|-
 +
| ~7.5 h
 +
| Liverpool Telescope
 +
|style="color:#FF0000" | No detection
 +
| 3-sigma limit of r’ > 22.15
 +
| We detect no source at the position of the candidate optical counterpart reported by Kitab
 +
| https://gcn.nasa.gov/circulars/33798
 +
|-
 +
| 1.003 d, 0.998 d
 +
| Zwicky Transient Facility
 +
|style="color:#FF0000" | No detection
 +
|  r , 21.02 mag; g , 20.83 mag
 +
| no sources were found up in the candidate optical counterpart reported by Kitab
 +
| https://gcn.nasa.gov/circulars/33799
 +
|-
 +
| 0.537 d, 1.543 d, 1.563 d
 +
| Nanshan/NEXT
 +
|style="color:#FF0000" | No detection
 +
|  r , 20.7 mag; r , 21.8 mag; z, 20.0 mag
 +
| No optical source is detected in our stacked images at the XRT source 5 position, it doesn't reveal the Kitab candidate although it is deeper.
 +
| https://gcn.nasa.gov/circulars/33800
 
|}
 
|}
  
 +
In the end no counterpart was detected. No counterpart was in the improved IPN triangulation (https://gcn.nasa.gov/circulars/33808)
  
 
== LST Observations ==
 
== LST Observations ==
  
−
* '''Dates of data-taking''':  
+
* * '''Dates of data-taking''': 2023-05-12
−
** Date (time of observation h)
+
** 2023-05-12 (4.1 h)
−
*** Zenith range (deg):
+
*** Zenith range (deg): 62 - 15
−
*** Transmission9km:
+
*** Transmission9km: n/a
−
*** Observation condition: ''dark, moonlight, twilight, mixed, calima, ...''
+
*** Observation condition: ''dark, moonlight, high level of dust, moderate cloudiness''
−
*** Observation mode: ''e.g., ON, std or custom wobbles''
+
*** Observation mode: ''std wobbles''
−
*** Runs:  
+
*** Runs: 12962 - 12973
−
*** Joint observations with MAGIC? : ''Yes/No''
+
*** Joint observations with MAGIC? : ''Yes''
−
*** ELOG link:
+
*** ELOG link: [https://www.lst1.iac.es/elog/LST+commissioning/2777]
−
*** Important comments: ''delay, ...''
+
*** Important comments: ''''
  
−
== Analysis by Name (Institute - email) ==
+
== Analysis by Arnau Aguasca-Cabot (UB - arnau.aguasca@fqa.ub.edu) ==
  
 
=== Data-taking information ===
 
=== Data-taking information ===
  
−
* Overall selected observation time:
+
* Overall selected observation time: ~ 4 h
−
* Selected runs:
+
* Selected runs: 12962 - 12973
−
* Position analyzed: ''RA, Dec''
+
* Position analyzed: ''295.4, 38.4''
−
 
 
−
=== Monte Carlo information ===
 
  
−
* Link to MC files used:
+
I divided the analysis between the dark analysis (12962 - 12968) and moon analysis (12969-12973) because the number of surviving pedestal for latter runs was higher than the threshold (4%) for the standard analysis. The moon raised more or less during run 12967. However, the standard cleaning seems OK until 12968.
−
** Particle types:
 
  
 
=== DL1 data ===
 
=== DL1 data ===
  
−
Please include your settings to produce your DL1a and DL1b files.  This includes whether you use LSTOSA, specific versions of lstchain, dllab scripts, cleaning levels, and calibration information.
+
Used DL1ab files produced by LSTOSA
−
 
 
−
'''Example''' :
 
  
−
Reprocessed using DL1a files produced by LSTOSA (lstchain v0.7.3) and dl1ab script (v0.7.5)
+
/fefs/aswg/data/real/DL1/20230512/v0.9/tailcut84/
  
−
* original DL1a files
+
For the moon analysis, I applied tighter cuts (tail cut 11, 5). Path to DL1b files for moon analysis:
 +
/fefs/aswg/workspace/arnau.aguasca/Analysis/results/real/DL2/20230512/srcind/v0.9.13/tailcut115_dynclg/AllSky_20230127_v0.9.12_base_prod_az_tel_dec_3476/
  
−
/fefs/aswg/data/real/DL1/20210808/v0.7.3/tailcut84/dl1_LST-1.Run0XXXX.XXXX.h5
+
The config file is here:
−
/fefs/aswg/data/mc/DL1/20200629_prod5_trans_80/XXX/zenith_20deg/south_pointing/20210416_v0.7.3_prod5_trans_80_local_taicut_8_4/
+
  /fefs/aswg/workspace/arnau.aguasca/scripts/_configs/GRB230512A/real_config_lstchain_belong_v0.9.13_tailcut115.json
−
 
 
−
* real data: tailcut8-4 (with cleaning based on pedestal RMS), dynamic cleaning
 
−
 
 
−
  /fefs/aswg/workspace/seiya.nozaki/data/BLLac/v0.7.3/tailcut84_dynamic_v075/DL1_raw/lstchain_standard_config.json
 
−
 
 
−
* MC: tailcut8-4 (with cleaning based on pedestal RMS), dynamic cleaning, PSF+NSB tuning
 
−
  "image_modifier": {
 
−
    "increase_nsb": true,
 
−
    "extra_noise_in_dim_pixels": 0.74,
 
−
    "extra_bias_in_dim_pixels": 0.38,
 
−
    "transition_charge": 8,
 
−
    "extra_noise_in_bright_pixels": 0.052,
 
−
    "increase_psf": true,
 
−
    "smeared_light_fraction": 0.125
 
−
  },
 
−
 
 
−
  /fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/DL1_raw/lstchain_dl1ab_tune_MC_to_BLLac_config.json
 
−
 
 
−
* Produced DL1b files
 
−
 
 
−
  /fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/DL1_raw/data/
 
−
/fefs/aswg/workspace/seiya.nozaki/data/BLLac/v0.7.3/tailcut84_dynamic_v075/DL1_raw/Run0XXXX
 
−
 
 
−
=== Random forest ===
 
−
 
 
−
Please include the path to the RF files used or your specific .json files used in producing your RFs and for which source analysis (source dependent or independent), and variables used in the RF.
 
−
 
 
−
'''Example'''
 
−
 
 
−
* lstchain-0.7.6.dev242+g2086cb9
 
−
 
 
−
* source-indep (diffuse gamma, src_r<3deg, disp_norm)
 
−
/fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/srcindep/RF/lstchain_standard_config.json
 
−
 
 
−
* source-dep
 
−
/fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/srcdep/RF/lstchain_src_dep_config.json
 
  
 
=== DL2 data ===
 
=== DL2 data ===
  
−
Information about your DL2 data and settings such as: specifc versions of lstchain, specfic .json version used.
+
* Random forest:  
  
−
'''Example''':
+
/fefs/aswg/data/models/AllSky/20230127_v0.9.12_base_prod_az_tel/dec_3476/
  
−
* lstchain-0.7.6.dev242+g2086cb9
+
* lstchain config file
 +
/fefs/aswg/data/models/AllSky/20230127_v0.9.12_base_prod_az_tel/dec_3476/lstchain_config.json
  
−
* source-indep
 
−
/fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/srcindep/DL2/data/
 
−
/fefs/aswg/workspace/seiya.nozaki/data/BLLac/v0.7.3/tailcut84_dynamic_v075/srcindep/DL2/data/dl2_LST-1.Run0XXXX_merged.h5
 
  
−
* source-dep
+
=== Theta2 plot from DL2===
−
/fefs/aswg/workspace/seiya.nozaki/data/MC/v0.7.5/tailcut84_dynamic_bllac/srcdep/DL2/data/
 
−
/fefs/aswg/workspace/seiya.nozaki/data/BLLac/v0.7.3/tailcut84_dynamic_v075/srcdep/DL2/data/dl2_LST-1.Run0XXXX_merged.h5
 
  
−
=== DL3 data selection ===
+
Dark analysis
 +
*Cuts and parameters used:
 +
**intensity > 50
 +
**gammaness > 0.7
 +
**Theta2_global_cut=0.09 (the uncertainty error of the Fermi-LAT position)
 +
**leakage < 0.2
  
−
Information about your DL3 data selection.  
+
Moon analysis
 +
*Cuts and parameters used:
 +
**intensity > 150
 +
**gammaness > 0.7
 +
**Theta2_global_cut=0.09 (the uncertainty error of the Fermi-LAT position)
 +
**leakage < 0.2
 +
The intensity cut value is chosen close to the peak of the intensity distribution for all run in moon conditions.
  
−
'''Example'''
 
−
*intensity > 50
 
−
*r: [0,  1 ]
 
−
*wl: [0.1, 1 ]
 
−
*leakage_intensity_width_2: [0, 0.2 ]
 
  
−
* source-indep
+
Theta2 plot for all runs:
−
**fixed_gh_cut: 0.3
+
{| align='center'
−
**fixed_theta_cut: 0.2
+
| [[Image: Theta2_DL2_plot_GRB230512A.png |thumb|600px|center|alt=Theta2 plot for GRB130512A. 3 OFF regions are used for the theta2 OFF distribution. |Theta2 plot for GRB230512A.]]
−
 
+
|}
−
* source-dep
 
−
**fixed_gh_cut: 0.7
 
−
**fixed_alpha_cut: 10
 
−
 
 
−
=== High-level analysis ===
 
−
 
 
−
Please put any information about the production of higher level analysis here.
 
−
 
 
−
'''Example'''
 
−
 
 
−
* Science Tool: gammapy 0.18.2
 
−
* Point-like IRF, 1D analysis
 
−
 
 
−
== Analysis Results ==
 
−
 
 
−
Please place higher-level analysis results (Spectra, SkyMaps, Lightcurves, etc) here.
 
−
If the alert was observed for several nights please add plots for each night separately and all data together.
 
−
 
 
−
=== Theta2 plot ===
 
−
 
 
−
=== Significance map ===
 
  
−
=== Excess map ===
+
Appling BKG normalisation between
 +
** norm_range_theta2_min=0.3   
 +
** norm_range_theta2_max=0.5
 +
The significance is 0.23 sigma.
  
−
=== Spectral results ===
+
----

Latest revision as of 13:40, 26 May 2023

Go back to Transient Working Group.

Go back to Transient observation logbook.

Alert Information[edit]

  • Name/type of the alert: Name
  • GCN notice: https://gcn.nasa.gov/circulars/33778
  • Triggered by: Fermi GBM (but alert from TH by Fermi-LAT)
  • Alert coordinates (From Fermi-LAT):
    • RA: 19 41 36.00 (hh mm ss), Dec: +38 24 00.00 (dd mm ss)
    • RA, Dec in deg (ICRS): 295.4, 38.4
  • Alert arrival time: 06:27:45 UT
  • Other relevant information:
    • Redshift (z): n/a

Multi-wavelength Observations[edit]

Timeline
T0+ Instrument Outcome Outcome specific value (flux/UL/...) Comment Link
0-300 s after the GBM trigger Fermi-LAT Detection (1.0 ± 0.3) E-05 ph/cm2/s The highest-energy photon is a 1.7 GeV https://gcn.nasa.gov/circulars/33780
45.5 - 57.3 ks Swift-XRT No aparent detection Nine uncatalogued X-ray sources have been detected However none of them is above the RASS limit or shows definitive signs of fading. https://gcn.nasa.gov/circulars/33789
2 hours Zwicky Transient Facility No aparent detection Two sources were found within the 95% localization region These are likely unrelated as they fall outside the LAT localization https://gcn.nasa.gov/circulars/33784
0.57624 d, 1.64044 d Kitab aparent detection 19.43, n/d (UL at 20) A source disappeared from May 12 to May 13 in the XRT #5 error circle https://gcn.nasa.gov/circulars/33796
14.22 hours GIT No detection >20.39 (r), >21.08 (g') 2x400s exposures in the r' and g' band https://gcn.nasa.gov/circulars/33797
~7.5 h Liverpool Telescope No detection 3-sigma limit of r’ > 22.15 We detect no source at the position of the candidate optical counterpart reported by Kitab https://gcn.nasa.gov/circulars/33798
1.003 d, 0.998 d Zwicky Transient Facility No detection r , 21.02 mag; g , 20.83 mag no sources were found up in the candidate optical counterpart reported by Kitab https://gcn.nasa.gov/circulars/33799
0.537 d, 1.543 d, 1.563 d Nanshan/NEXT No detection r , 20.7 mag; r , 21.8 mag; z, 20.0 mag No optical source is detected in our stacked images at the XRT source 5 position, it doesn't reveal the Kitab candidate although it is deeper. https://gcn.nasa.gov/circulars/33800

In the end no counterpart was detected. No counterpart was in the improved IPN triangulation (https://gcn.nasa.gov/circulars/33808)

LST Observations[edit]

  • * Dates of data-taking: 2023-05-12
    • 2023-05-12 (4.1 h)
      • Zenith range (deg): 62 - 15
      • Transmission9km: n/a
      • Observation condition: dark, moonlight, high level of dust, moderate cloudiness
      • Observation mode: std wobbles
      • Runs: 12962 - 12973
      • Joint observations with MAGIC? : Yes
      • ELOG link: [1]
      • Important comments: '

Analysis by Arnau Aguasca-Cabot (UB - arnau.aguasca@fqa.ub.edu)[edit]

Data-taking information[edit]

  • Overall selected observation time: ~ 4 h
  • Selected runs: 12962 - 12973
  • Position analyzed: 295.4, 38.4

I divided the analysis between the dark analysis (12962 - 12968) and moon analysis (12969-12973) because the number of surviving pedestal for latter runs was higher than the threshold (4%) for the standard analysis. The moon raised more or less during run 12967. However, the standard cleaning seems OK until 12968.

DL1 data[edit]

Used DL1ab files produced by LSTOSA 

/fefs/aswg/data/real/DL1/20230512/v0.9/tailcut84/

For the moon analysis, I applied tighter cuts (tail cut 11, 5). Path to DL1b files for moon analysis: 

/fefs/aswg/workspace/arnau.aguasca/Analysis/results/real/DL2/20230512/srcind/v0.9.13/tailcut115_dynclg/AllSky_20230127_v0.9.12_base_prod_az_tel_dec_3476/

The config file is here: 

/fefs/aswg/workspace/arnau.aguasca/scripts/_configs/GRB230512A/real_config_lstchain_belong_v0.9.13_tailcut115.json

DL2 data[edit]

  • Random forest:
/fefs/aswg/data/models/AllSky/20230127_v0.9.12_base_prod_az_tel/dec_3476/
  • lstchain config file
/fefs/aswg/data/models/AllSky/20230127_v0.9.12_base_prod_az_tel/dec_3476/lstchain_config.json


Theta2 plot from DL2[edit]

Dark analysis

  • Cuts and parameters used:
    • intensity > 50
    • gammaness > 0.7
    • Theta2_global_cut=0.09 (the uncertainty error of the Fermi-LAT position)
    • leakage < 0.2

Moon analysis

  • Cuts and parameters used:
    • intensity > 150
    • gammaness > 0.7
    • Theta2_global_cut=0.09 (the uncertainty error of the Fermi-LAT position)
    • leakage < 0.2

The intensity cut value is chosen close to the peak of the intensity distribution for all run in moon conditions.


Theta2 plot for all runs:

Theta2 plot for GRB130512A. 3 OFF regions are used for the theta2 OFF distribution.
Theta2 plot for GRB230512A.

Appling BKG normalisation between

    • norm_range_theta2_min=0.3
    • norm_range_theta2_max=0.5

The significance is 0.23 sigma.

Retrieved from "https://www.lst1.iac.es/wiki/index.php?title=GRB230512A&oldid=7670"