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The University of Hawaiʻi Institute for Astronomy Initiates Decommissioning of UKIRT

UKIRT is the third telescope to be decommissioned, reaffirming UH’s commitment to responsible stewardship and restoration of these sites on Maunakea.

https://www.maunakeaobservatories.org/stories/the-university-of-hawaii-institute-for-astronomy-initiates-decommissioning-of-ukirt

#UKIRT #Hawaii #Astronomy #Astrodon #science #STEM #news

The University of Hawaiʻi Institute for Astronomy Initiates Decommissioning of UKIRT — Maunakea Observatories

The University of Hawaiʻi Institute for Astronomy (IfA) has officially initiated the decommissioning process for the United Kingdom Infrared Telescope (UKIRT) on Maunakea. UKIRT is the third telescope to be decommissioned, reaffirming UH’s commitment to responsible stewardship and restoration of the

Maunakea Observatories

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Richard Brockie Nov 20, 2024

During my astronomy PhD in the ’90s I had the very good fortune to travel twice to Mauna Kea from Scotland to use UKIRT, the United Kingdom InfraRed Telescope. Here it is shortly after sunset in October 2024 preparing for a night of astronomy. #ukirt #MaunaKea #hawaii

Daniel Pomarède Mar 12, 2024

in the #arXiv

Hawai`i Supernova Flows: A Peculiar Velocity Survey Using Over a Thousand Supernovae in the Near-Infrared

by Aaron Do and co-authors
https://arxiv.org/abs/2403.05620

#cosmography #cosmology #cosmicflows #ZTF #transient #atlas #asassn #SDSS #6dF #redshift #UKIRT #Subaru #telescope #telescopes #survey #surveys #infrared #nearinfrared #LSS #astronomy #astrophysics #astrodon #supernovae #galaxies #universe #localuniverse #catalogues #space #science #research #STEM #Hawaii #UHIfA

Hawai'i Supernova Flows: A Peculiar Velocity Survey Using Over a Thousand Supernovae in the Near-Infrared

We introduce the Hawai'i Supernova Flows project and present summary statistics of the first 1,217 astronomical transients observed, 668 of which are spectroscopically classified Type Ia Supernovae (SNe Ia). Our project is designed to obtain systematics-limited distances to SNe Ia while consuming minimal dedicated observational resources. To date, we have performed almost 5,000 near-infrared (NIR) observations of astronomical transients and have obtained spectra for over 200 host galaxies lacking published spectroscopic redshifts. In this survey paper we describe the methodology used to select targets, collect/reduce data, calculate distances, and perform quality cuts. We compare our methods to those used in similar studies, finding general agreement or mild improvement. Our summary statistics include various parametrizations of dispersion in the Hubble diagrams produced using fits to several commonly used SN Ia models. We find the lowest dispersions using the \texttt{SNooPy} package's EBV\_model2, with a root mean square (RMS) deviation of 0.165 mag and a normalized median absolute deviation (NMAD) of 0.123 mag. The full utility of the Hawai'i Supernova Flows data set far exceeds the analyses presented in this paper. Our photometry will provide a valuable test bed for models of SN Ia incorporating NIR data. Differential cosmological studies comparing optical samples and combined optical and NIR samples will have increased leverage for constraining chromatic effects like dust extinction. We invite the community to explore our data by making the light curves, fits, and host galaxy redshifts publicly accessible.

arXiv.org