IJCLab CTAO Weekly Meeting

jeudi 8 oct. 2026, 11:00 → 12:00 Europe/Paris

IJCLab

The IJCLab CTAO Weekly Meeting brings together team members to share scientific and technical updates related to CTAO activities.

Each meeting includes a brief discussion of interesting new papers, a round table covering recent progress, news, and any issues requiring input from the group, followed by a rotating presentation. The presentation may focus on ongoing work, a recent publication, or a conference report.

Participants are asked to add their updates to the relevant section of the Indico page before the meeting. The meeting is limited to one hour.

Connection details

https://visio.numerique.gouv.fr/qti-ijlz-uob

Location

Atreya and Maëlle’s office

11:00 → 11:05 Recent literature highlights

Brief discussion of recent publications relevant to the group’s scientific activities.

• Time-Integrated Searches for Sub-TeV Neutrino Sources with IceCube-DeepCore - https://arxiv.org/abs/2609.12055

• Investigating X-ray Emission from Radio-detected Broad- and Narrow-line Seyfert 1 Galaxies - https://arxiv.org/abs/2610.07288

11:05 → 11:30 Round-table updates

Each team member has about five minutes to present recent progress, news, upcoming activities, or problems requiring feedback from the group.

11:05 Maëlle Perois

Orateur: Maëlle Perois (IJCLab)

• Starting constructing catalog of Seyferts:  looking at IceCube catalogue of X-ray bright sources used for stacking analysis (BAT catalogue with ~800 sources).
• Installing stuff :D 

11:10 Julian Hamo

Orateur: Julian Hamo (IJCLab)

• Waiting for SAPO review for the article on the detection of extreme states of blazars from optical alerts through Fink
• Working on PSD reconstruction through Gaussian Processes to avoid uneven sampling impact on the PSD. Unsure whether or not the module (Pioran) is usable.
• Probing on other time-relative quantities, such as doubling/halving timescales
• Goal is to set a ML pipeline to characterize (and identify?) gamma-ray blazars through optical large scale surveys (from colour space and time space)

11:15 Anastasiia Miknno

Orateur: Anastasiia MIKHNO (LPNHE, IJCLab)

11:20 Atreya Acharyya

Orateur: Atreya Acharyya (IJCLab)

• I serve as the convener of the CTAO AGN Population Task Force.
• The project studies the AGN population accessible to CTAO, extrapolating the Fermi-LAT AGN population into the VHE regime and accounting for source variability and CTAO detectability.
• My main contribution is the gamma-ray luminosity function reconstruction, using simulated CTAO populations to determine how well CTAO can constrain the luminosity and redshift evolution of the underlying blazar population. 
• A full project and progress update will be presented next week.

11:25 Tiina, Jonathan, Federica

Orateurs: Federica Bradascio (IJCLab, Université Paris-Saclay), Jonathan Biteau (Université Paris-Saclay, CNRS/IN2P3, IJCLab), Tiina Suomijarvi

• Tiina: working with Pooja on paper on CTAO simulations of Pevatrons candidates. Repling to comments from Journal.
• Federica: preparation of day-after shifts for NectarCAM, updating TRR requirements, finalizing dark matter on galaxy clusters.

11:30 → 11:55 Rotating presentation

A 15-minute presentation followed by 10 minutes of discussion. The presentation may cover ongoing work, a recent publication, a methodological topic, or a conference report.

11:30 Multi-messenger study of Seyfert Galaxies Variability

Maëlle will present her M2 internship results and topic for her PhD research.

Orateur: Maëlle Perois (IJCLab)

11:55 → 12:00 AOB