The Event Horizon Telescope (EHT) Collaboration, in collaboration with the Atacama Large Millimeter/submillimeter Array (ALMA), has conducted 345 GHz test observations achieving the highest-resolution ever obtained from the surface of the Earth.

The LMT is happy to report that the recent successful negotiations between INAOE and the Texamalaquilla community have resulted in the reopening of our access to the LMT site road and the LMT on the summit of Sierra Negra. Consequently we are now in the process of cooling down the suite of scientific instrumentation and […]

The Large Millimeter Telescope (LMT) is currently closed due to our inability to reach the telescope site (Sierra Negra) via our normal high-altitude site road (above 3300m). During the last few weeks, the residents of Texmalaquilla, the last village that the LMT staff and visiting scientists travel through to gain access to our site road, […]

A new image from the Event Horizon Telescope (EHT) collaboration has uncovered strong and organized magnetic fields spiraling from the edge of the supermassive black hole Sagittarius A* (Sgr A*). Seen in polarized light for the first time, this new view of the monster lurking at the heart of the Milky Way Galaxy has revealed […]

As noted in a previous message to our user community, the LMT has been without power for a number of months. The loss of power followed a severe electrical storm at the 4600m-altitude LMT site which damaged the input power line and our power station at the mountain summit. Last week, repairs to the system were completed and power to the telescope was fully restored.

The Event Horizon Telescope Collaboration has released new images of M87* from observations taken in April 2018, one year after the first observations in April 2017.

The LMT is pleased to announce that the review process of the proposals submitted to the 2024-S1 Call has been completed and the results are now available.

The Call for Proposals for the 2024-S1 observing season is now closed.

The LMT announces a new call for proposals for the 2024-S1 observing season.

Message to the LMT user-communities: Suspended LMT observations and delay to the release of the next Call for Scientific Proposals for the LMT 2024-S1 observing season.

A recent major forest fire on Volcán Sierra Negra, located in the Mexican federal National Park of Pico de Orizaba, has negatively impacted the current operations of the Large Millimeter Telescope (LMT) and the High Altitude Water Cherenkov Array (HAWC).

The Large Millimeter Telescope (LMT) hosted a booth at the 241st AAS meeting was held in Seattle, WA on 8-12 January, 2023.

The EHT Collaboration unveils the first image of the supermassive black hole at the center of the Milky Way.

In March 2020 the Large Millimeter Telescope (LMT) ceased all scientific operations due to the COVID-19 pandemic and the telescope currently remains closed. During the last 16 months a limited number of visits to the LMT site have been possible, primarily to make inspections of the telescope and site infrastructure.

The Event Horizon Telescope (EHT) collaboration joins efforts with different institutions and telescopes around the world to produce a multi-frequency view of the supermassive black hole in the center of the galaxy M87.

The Event Horizon Telescopes captures the polarised light, a signature of magnetic fields, at the edge of M87’s Supermassive Black Hole.

In light of continued Federal restrictions in Mexico due to the COVID-19 pandemic, the LMT Collaboration is unable to safely restart the maintenance and scientific operation of the telescope on the timescale we had originally planned.

The Large Millimeter Telescope Alfonso Serrano (LMT) invites members of the Mexican, U.S. and Spanish astronomy research communities to participate in the open call for scientific observing proposals (2021-S1).

Over the next two months the LMT will host a series of short Webinar meetings with the scientific communities of the LMT partners in Mexico and the U.S.

The LMT collaboration has prepared a facilities white paper for The National Academies of Sciences, Engineering, and Medicine Decadal Survey on Astronomy and Astrophysics.

The NSF will continue its support to the EHT, with the LMT serving as a testbed for advanced dual frequency receivers.

The Event Horizon Telescope (EHT) international collaboration, including the LMT, has been awarded the “2020 Breakthrough Prize in Fundamental Physics”.

The LMT collaboration is writing a facilities white paper for The National Academies of Sciences, Engineering, and Medicine Decadal Survey on Astronomy and Astrophysics.

On April 10th 2019, the LMT and the EHT Collaboration presented the first image of the shadow of a super-massive black hole (M87*).

The Event Horizon Telescope Collaboration will present its first results in multiple simultaneous press conferences around the world. The event will be streamed live online.

Astrophysicists, using the LMT, have detected an unexpected and powerful outflow of molecular gas in a distant active galaxy similar to the Milky Way.

Gisela Ortiz, former PhD student at the Instituto de Radioastronomía y Astrofísica (UNAM) and LMT collaborator, has been awarded the IAU prize for best 2017 PhD thesis in Fundamental Astronomy.

On December 13th, 2017, the last two segments of the 50m diameter primary surface of the LMT were installed.

The Large Millimeter Telescope Alfonso Serrano invites members of the Mexican astronomy community and members of the Department of Astronomy at the University of Massachusetts and the Five College Astronomy Department to participate in the call for Science observing proposals 2018-S1.

A new hexapod and a secondary reflector surface have been installed and successfully tested at the LMT.

During the period 4-10 April 2017, the LMT participated in the Event Horizon Telescope (EHT) experiment to image the supermassive black hole at the center of our Galaxy.

The Large Millimeter Telescope Alfonso Serrano (LMT) invites members of the Mexican astronomy community and members of the Department of Astronomy at the University of Massachusetts and the Five College Astronomy Department to participate in the call for Early Science observing proposals 2015-ES4.

The LMT participated in the Event Horizon Telescope experiment to image the supermassive black hole at the centre of our Galaxy.

A new 1.3 mm dual-polarization receiver and coupling optics have been developed and installed at the LMT for VLBI observations.

10 December 2014 – First refereed paper based on LMT data has been published

The Large Millimeter Telescope Alfonso Serrano (LMT) invites members of the Mexican astronomy community and members of the Department of Astronomy at the University of Massachusetts and the Five College Astronomy Department to participate in the third call for Early Science observing proposals.

Scientific American has published an article regarding the installation of an hydrogen maser at the LMT. This atomic clock will allow the LMT to participate and contribute in VLBI observations.

A US-Mexican team of astronomers installed a hydrogen maser frequency standard at the LMT to enable Very Long Baseline Interferometry (VLBI) experiments.

The Call for Proposals to observe with the LMT during the 2014-ES2 season was closed on January 13^th, 2014. The proposals are now under evaluation by the Scientific Committee, in order to assign telescope time and schedule the 2014-ES2 observations.

The Large Millimeter Telescope Alfonso Serrano (LMT) invites members of the Mexican astronomy community and members of the Department of Astronomy at the University of Massachusetts and the Five College Astronomy Department to participate in the second call for Early Science observing proposals.

On September 18th, 2013, INAOE and WebCams de México commissioned two HD web cameras at the LMT site which will continuously broadcast images via the internet.

An international team of US and Mexican scientists has completed a successful Very Long Baseline Interferometry (VLBI) test between the Large Millimeter Telescope Alfonso Serrano (LMT) and several Very Long Baseline Array (VLBA) stations.

The 50-m Large Millimeter Telescope (LMT) invites members of Mexican astronomy community and members of the Department of Astronomy at the University of Massachusetts and the Five College Astronomy Department to participate in the first call for Early Science observing proposals.