OT081

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Alert Information

• Name/type of the alert: OT081 // PKS1749+096
• Triggered by:
• GCN notice: Notice + update
• Alert coordinates:
  • RA: 17 h 51 m 12.000 s, Dec: +11 deg 25 m 11.640 s
  • RA, Dec in deg (ICRS): 267.80 deg, 11.4199 deg
• Alert arrival time: 20:47 UTC
• Other relevant information: possible counterpart IC220303A

LST Observations

• 2022-03-03:
  • Date (time of observation h)
    • ZD range (deg): 43 -> 36
    • Transmission 9km: 0.96
    • Runs: 7247, 7248, 7249, 7250
    • Joint observations with MAGIC? : Yes
    • ELOG: link

• 2022-03-04:
  • Date (time of observation h)
    • ZD range (deg): 47 -> 36
    • Transmission 9km: 1.06
    • Runs: 7268, 7269, 7270, 7271
    • Joint observations with MAGIC? : No
    • ELOG: link

Fast Analysis by Alice Donini (INAF)

Configuration

• Position analyzed:
  • (RA,Dec) 17:51:32.82, 9:39:00.73

• Selected observation time:

DL1 data

• DL1 files produced by LSTOSA v0.9.2 with tailcut8-4

Random forest

• source-indep:

/fefs/aswg/data/models/20200629_prod5_trans_80/zenith_40deg/south_pointing/20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4/

DL2 data

• source-indep
• lstchain v0.9.2

Analysis Results

Data selection

• intensity cut = 50
• gammaness cut = 0.7
• leakage_intensity_width_2 < 0.2

Theta2 plot

• 2022-03-03:

Theta2 plot for OT081.

Excess plot for OT081.

• 2022-03-04:

Theta2 plot for OT081.

Excess plot for OT081.

• Stacked analysis:

Theta2 plot for OT081.

Excess plot for OT081.

Fast Analysis by Kenta Terauchi

Configuration

• Analyzer: Kenta Terauchi (Kyoto Univ, email: terauchi.kenta.74s@st.kyoto-u.ac,jp)
• Position analyzed:
  • RA: 267.88 deg, Dec: 9.65 deg

• Selected observation time:

DL1 data

• DL1 files produced by LSTOSA v0.9.2 with tailcut8-4

Random forest

• source-indep:

/fefs/aswg/data/models/20200629_prod5_trans_80/zenith_40deg/south_pointing/20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4/

DL2 data

• source-indep
• lstchain v0.9.2

Analysis Results

Data selection

• intensity > 50
• gammaness > 0.7
• leakage_intensity_width_2 < 0.2

Theta2 plot

• theta < 0.2
• norm_range_theta2: 0.3 - 0.5 (For calculation of alpha)

• 2022-03-03:

Theta2 plot for OT081. (2022-03-03)

• 2022-03-04:

Theta2 plot for OT081. (2022-03-04)

• Stacked analysis:

Theta2 plot for OT081. (stack)