(2026/05/07) Lab Safety Talk Best Practices Competition

• ObsCAL was selected as an award recipient in the KAIST Lab Safety Talk Best Practices Competition (Lab Safety Talk 우수사례 공모전 장려상).

• As the group's instrumentation and laboratory activities continue to expand, we remain committed to maintaining a safe and responsible research environment.

(2026/05/06) 2026 Asia-Pacific Regional IAU Meeting (Hong Kong)

• Junhan and Minjae attended the 2026 Asia-Pacific Regional IAU Meeting (APRIM).

• Minjae presented a poster titled "X-ray Signatures of the Hot Circumgalactic Medium in IllustrisTNG", supported through the KAIST URP Follow-up Research Program (URP 우수과제 후속지원).

(2026/04/28) First Light for the Undergraduate Radio Lab

• The undergraduate radio laboratory experiment achieved its first detection of Galactic neutral hydrogen emission at 21 cm.

• Jiwon is leading the development and commissioning of the project. The goal is to establish a laboratory course for Prof. Kim’s radio astronomy class, spanning basic radio-frequency component measurements to interferometry experiments using 1.5 m dishes.

(2026/04/21-04/24) 2026 Spring Korean Physical Society Meeting (Daejeon)

• Five members of the group attended the 2026 Spring Korean Physical Society Meeting in Daejeon and delivered oral presentations on their recent research.

  • Junhan: "KAIST-ATNF Joint Research Center for Low-frequency VLBI"

  • MinSu: "Prototype Receiver Development for COMAP-EoR: Toward CO Line-Intensity Mapping at z=4.8–8.5"

  • Yeomoon: "Gas Axial Ratios and Orientations of the CHEX-MATE Galaxy Clusters"

  • Minjae: "X-ray Signatures of the Hot Circumgalactic Medium in IllustrisTNG"

  • Kihong: "Quantifying the Reliability of Planck-Only Cluster Geometry Analyses in CHEX-MATE"

• MinSu received an Outstanding Presentation Award (우수발표상). Congratulations!

(2026/04/17) Department of Physics Machine Shop and Facilities Tour

• Lab members toured the KAIST Department of Physics machine shop and fabrication facilities, which are equipped with a variety of machining tools and 3D printers, with the help of 박인석 선생님 from the administrative team.

• Several group members will receive training to support in-house fabrication and instrumentation work for research projects.

(2026/04/08-04/10) 2026 Spring Korean Astronomical Society Meeting (Suwon)

• Jiwon presented a poster titled "Investigation of the Distant Halo Star Candidates in the Milky Way from Gaia DR3 Cepheids" (a project with Prof. Ho Seong Hwang at SNU).

• Minjae presented a poster titled "SPHEREx Near-Infrared Spectrophotometric View of Luminous Quasars at z > 5 Rest-Frame Optical Properties and Physical Implications" (a project with Dr. Bomee Lee at KASI).

(2026/04/03) Strawberry Party

• With cherry blossoms in full bloom, we celebrated KAIST Strawberry Party (딸기파티) this week. It was a wonderful spring day on campus, and we enjoyed the gathering together with members of the KASI radio group.

(2026/03/30) 12th Korea Astronomy Machine Learning Meeting Spring 2026: "From Data to Discovery"

• Minjae, Jiwon, and Hakjin attended the KAML Spring 2026 meeting and presented their recent works.

  • Minjae: "Exploring Causal Inference in Galaxy Evolution via Double Machine Learning"

  • Jiwon: "Uncertainty-Quantified Cepheid Subtype Classification in Degenerated Class Regions Using Evidential Deep Learning"

  • Hakjin: "Neural-Surrogate-Guided Sequential Reshaping for Asteroid Lightcurve Inversion"

(2026/02/27) KASI-KAIST SKA-VLBI Meeting

• Junhan, Eunchan, and Jiwon visited KASI for the inaugural KASI-KAIST SKA-VLBI Meeting, joining Bong Won Sohn’s group, including his students Min-Ji and Sieun.

• This meeting aims to foster collaboration and synergy towards the SKA-VLBI initiative with the KAIST–ATNF G-HUB Program.

(2026/02/27) Welcoming New Members

• We warmly welcomed our new graduate students, Heebeom and Eunchan, to the ObsCAL group. We are also delighted that Jiwon has joined us as a post-baccalaureate researcher. We look forward to an exciting and productive semester together!

(2026/02/05) Presidential Science Scholarship Reception

• MinSu was invited to attend the Presidential Science Scholarship and National Olympiad Delegation Reception and Roundtable (대통령과학장학생·올림피아드 대표단 친수 및 간담회) at the Blue House (청와대).

(2026/01/27) BURSTT Project at KVN Pyeongchang

• Junhan, Yeomoon, and Kihong visited KVN Pyeongchang Station to support the array installation for the Bustling Universe Radio Survey Telescope (BURSTT) project .

• During the visit, we conducted RFI measurement tests. These efforts were aimed at evaluating the feasibility of a future low-frequency antenna array, as part of the KAIST–ATNF G-HUB Program.