Welcome Room: 215

Science working group review

• Andrei Lobanov

Room: 215

Expanding the Global mm-VLBI Array with Multi-Band Receivers

• Eduardo Ros (MPI für Radioastronomie)

Room: 215

Tri-band maser studies of star-forming regions

• Kazi Rygl (Istituto Nazionale di Astrofisica (INAF))

Room: 215

Tracking Binary SMBH Orbits Using Global K/Q/W Simultaneous VLBI: Test Observations with KVN and Yebes-40m

• Hyunwook Ro (Korea Astronomy and Space Science Institute)

Room: 215

Proposal of Observing 183 GHz Water Megamasers with VLBI: Scientific motivation and Feasibility

• Yoshiaki Hagiwara (Toyo University)

Room: 215

DARKER: a science case to shed light on dark matter and dark energy with the tri-band receivers

• Cristiana Spingola (INAF - Istituto di Radioastronomia)

Room: 215

EVN observations of the high-frequency methanol masers

• Luca Moscadelli (Istituto Nazionale di Astrofisica (INAF))

Room: 215

The Supermassive Black Hole Binary Candidate 3C 66A

• Paloma Thevenet (Observatoire de Paris - PSL)

Room: 215

Tech working group review

• Helge Rottmann

Room: 215

Tri-band receivers for INAF radio telescopes: first light

• Pietro Bolli (Istituto Nazionale di Astrofisica (INAF))

Room: 215

KVN Update

• Taehyun Jung

Room: 215

Exploring weak targets with simultaneous multi-band observations and an update of the triple band receiver for Tianma-65m and CVN

• Wu Jiang (Shanghai Astronomical Observatory, CAS)

Room: 215

The Yebes 40 m radio telescope multi frequency system at K-, Q- and W-bands

• Pablo de Vicente (Observatorio de Yebes - IGN)

Room: 215

Developing FPT/SFPR capabilities for APEX and Effelsberg telescopes

• Guang-Yao Zhao (MPI für Radioastronomie)

Room: 215

Tri-band receiver for Onsala Space Observatory

• Michael Lindqvist (Chalmers)

Room: 215

Metsähovi Radio Observatory Triple-Band Receiver project

• Tuomas Savolainen (Metsähovi Radio Observatory)

Room: 215

The Development Progress of the K/Q/W Triple-Band Cryogenic Receiver for the Tianma Telescope

• Weiye Zhong (Shanghai Astronomical Observatory, CAS)

Room: 215

Flash talk on SARAO's Receivers Team

• Michael Johnston

Room: 215 The South African Radio Astronomy Observatory (SARAO) is a national facility that is responsible for radio astronomy research and infrastructure development in South Africa. It manages key projects such as the MeerKAT telescope which is a precursor to the Square Kilometre Array (SKA)-mid telescope. The Receivers Team at SARAO is primarily responsible for the production of Digitsers units for radio astronomy receivers. SARAO’s role goes beyond astronomy, fostering innovation in technology, high-performance computing, and skills development across the African continent.

Global VLBI in the era of the African Millimeter Telescope

• James Chibueze (University of South Africa)

Room: 215

Development of Radio Astronomy Infrastructure in Thailand: The Thai National Radio Telescope and Beyond

• Bannawit Pimpanuwat (National Astronomical Research Institute of Thailand)

Room: 215

Study and Design of 18GHz Wideband Analog Optical Link and Fiber Transfer Delay Measurement System for millimeter-wave VLBI INAF antennas

• Jacopo Nanni (Università di Bologna, associato Istituto Nazionale di Astrofisica (INAF))

Room: 215

Current status and future developments of receivers at NAOJ’s VLBI facilities

• Mareki Honma

Room: 215 In this presentation I will review current status of receivers at VLBI stations in Japan, including the frequency bands, bandwidths, and potential for multi-frequency receiving capability. I will focus primarily on VLBI facilities operated by the National Astronomical Observatory of Japan (NAOJ), such as the VERA network and the Nobeyama 45m radio telescope, while also briefly introducing the status of radio telescopes at universities and other institutions. In addition, I will introduce ongoing developments of new receivers, including new 86 GHz receivers for VERA and their potential capability for future multi-frequency observations, and a wideband C-band receiver for VERA, as well as planned 1-mm receiver for the Nobeyama 45m telescope.

Development of multi-band receiving systems in the Nobeyama 45 m telescope and its perspective

• Hiroshi Imai (Kagoshima University)

Room: 215

Discussion session 1: Technology Room: 215 Chairs: M. Rioja, B. W. Sohn

VHE (CTAO) science review

• Michele Doro (University of Padova)

Room: 215

GW science review

• Alberto Colombo (Istituto Nazionale di Astrofisica (INAF))

Room: 215

Neutrino astrophysics

• Giulia Illuminati (INFN Bologna)

Room: 215

Prospects for sub-mm astrometry with the updated Event Horizon Telescope

• Richard Dodson (ICRAR)

Room: 215

Multi-frequency Gaussian modeling of AGN jets with the extended Korean VLBI Network

• Hyeon-Woo Jeong (University of Science and Technology, Korea (UST) / Korea Astronomy and Space Science Institute, Korea (KASI))

Room: 215

Multimessenger study of neutrino-candidate blazar PKS 0735+178 using Korean VLBI Network multi-band observations

• Sanghyun Kim (Korea Astronomy and Space Science Institute (KASI))

Room: 215

Multifrequency VLBI detection of supermassive black hole binaries at millimeter wavelengths

• Shan-Shan Zhao (Shanghai Astronomical Observatory)

Room: 215

Acceleration and Collimation Zone (ACZ) of the NGC 4261 Jet: A Scaled-down Counterpart to M 87?

• Xi Yan (Xinjiang Astronomical Observatory(XAO), CAS)

Room: 215 In this report, we present our recent study of the acceleration and collimation of the two-sided jets in the nearby low-luminosity AGN NGC 4261. We robustly identify a parabolic-to-conical structural transition in both the jet and counterjet, with the transition occurring on (sub)parsec scales. Based on the jet-to-counterjet brightness, we derive the jet velocity field at distances of ∼ (10^3 -10^4) Rs. Although local kinematic variations are present, the jet shows an overall acceleration to relativistic speeds within the parabolic jet region. These results support the existence of a (sub)parsec-scale (≲ 1.5 pc) ACZ in NGC 4261. A brief comparison with M 87 suggests that the ACZ in NGC 4261 may represent a scaled-down analogue of that in M 87. We prospect that future (sub)mm-VLBI observations with multi-band receivers will be crucial to explore jet launching regions and their connection to ACZs.

Is PKS 1540−077 a Compact Symmetric Object or a SMBH Pair?

• Xiaopeng Cheng (Korea Astronomy and Space Science Institute)

Room: 215

Sardinia radio telescope status and challenges

• Sergio Poppi (Istituto Nazionale di Astrofisica (INAF))

Room: 215

Multi-frequency enabling at the stations of Medicina and Noto

• Andrea Orlati (Istituto Nazionale di Astrofisica (INAF))

Room: 215

Discussion on INAF Activities Room: 215 Chairs: F. Govoni, C. Trigilio

Sub-pc scale mm molecular clouds associated with the torus of NGC 1052

• Satoko Sawada-Satoh (Osaka Metropolitan University)

Room: 215

Discussion session 2: Science Room: 215 Chairs: A. Lobanov, T. Venturi, R. Lico

Discussion session 3: Management and Baseline definitions Room: 215 chairs: J. Conway, E. Ros