Near Ultraviolet Transient Explorer (NUTEx): A CubeSat-Based NUV Imaging Payload for Transient Sky Surveys

Abstract

The Near Ultraviolet Transient Explorer (NUTEx) is a CubeSat-based near-ultraviolet (NUV) imaging payload designed for transient sky surveys and is currently under development. CubeSats are compact and cost-effective satellite platforms that have emerged as versatile tools for scientific exploration and technology demonstrations in space. NUTEx is an imaging telescope operating in the 200-300 nm wavelength range, intended for deployment on a micro-satellite bus. The optical system is based on a Ritchey Chretien (RC) telescope configuration, featuring a 146 mm primary mirror. The detector is a photon-counting microchannel plate (MCP) device with a solar-blind photocathode, paired with an in-house developed readout unit. The instrument has a wide field of view (FoV) of 4 deg, a peak effective area of approximately 18 sq cm at 260 nm, and can reach a sensitivity of 21 AB magnitude (SNR = 5) in a 1200 second exposure. The primary scientific objective of NUTEx is to monitor the night sky for transient phenomena, such as supernova remnants, flaring M-dwarf stars, and other short-timescale events. The payload is currently scheduled for launch in Q2 2026. This paper presents the NUTEx instrument design, outlines its scientific goals and capabilities, and provides an overview of the electronics and mechanical subsystems, including structural analysis.

10 figures, 6 tables

References in corpus (20)

• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• Swift and NuSTAR observations of GW170817: detection of a blue kilonova
• Early supernovae light-curves following the shock-breakout
• The On-Orbit Performance of the Galaxy Evolution Explorer
• The Kepler Catalog of Stellar Flares
• The early UV/Optical emission from core-collapse supernovae
• Supernova PTF 09uj: A possible shock breakout from a dense circumstellar wind
• Science with a wide-field UV transient explorer
• Ultra Violet Imaging Telescope (UVIT) on ASTROSAT
• On the Verge of an Astronomy CubeSat Revolution
• Short Duration Stellar Flares in GALEX Data
• Small near-Earth asteroids in the Palomar Transient Factory survey: A real-time streak-detection system
• Asteroid rotation periods from the Palomar Transient Factory survey
• Transiting Planets with LSST II. Period Detection of Planets Orbiting 1 Solar Mass Hosts
• Achievements and Lessons Learned from Successful Small Satellite Missions for Space Weather-Oriented Research
• Studying the Imaging Characteristics of Ultra Violet Imaging Telescope (UVIT) through Numerical Simulations
• Prospect for UV observations from the Moon. II. Instrumental Design of an Ultraviolet Imager LUCI
• In orbit performance of UVIT over the 5 years
• Development Of Raspberry Pi-based Processing Unit for UV Photon-Counting Detectors
• Spectroscopic Investigation of Nebular Gas (SING): Instrument Design, Assembly and Calibration