HRCCS Archives

Recovery of an injected signal for the cloud-free case of V1298 Tau b on a vrest − KP grid for each synthetic night simulated using Ratri for the case of (top row) the optimistic detrending scenario and (bottom row) the non-reprocessing scenario where the SVD+MLR based detrending is followed by cross-correlation with a template model with no reprocessing performed on it. The injected signal is successfully detected in all three nights for the optimistic detrending scenario. For the non-reprocessing scenario, the injected signal is successfully detected only in Night 3 but with weaker constraints on KP compared to the optimistic detrending case. For the other two nights, the signal is either completely removed by the detrending scenario resulting in a non-detection (Night 1) or a detection at a much higher value of KP compared to the injected value (Night2). For more discussion about confidence intervals and what constitutes a detection, please see Section 2.4.3. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Probing The Atmospheres Of Young Long-Period Sub-Neptune Progenitors With ELT/ANDES

by Keith CowingMarch 1, 2026March 1, 2026

High-resolution cross-correlation spectroscopy (HRCCS) has emerged as a powerful technique for detecting and characterizing exoplanet atmospheres from the ground.

Schematic of scope pipeline. This example uses a planetary emission spectrum calculated with the CHIMERA (Line et al. 2013) atmospheric model as input. This simulation is meant to reconstruct the IGRINS dataset used to identify the emission of WASP-77Ab by Line et al. (2021). The slight discontinuity in the planetary emission tracks is due to a gap in exposures corresponding to these observations. The SNR of this simulation matches the SNR of the Line et al. 2021 observations (SNR=12.8); 9 other noise realizations span SNRs from 11.0 to 19.0. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Forward-modeling The Uncertainty Budget of High-resolution Spectroscopy of Exoplanet Atmospheres

by Keith CowingNovember 14, 2024November 14, 2024

Ground-based high-resolution cross-correlation spectroscopy (HRCCS; R >~ 15,000) is a powerful complement to space-based studies of exoplanet atmospheres. By resolving individual spectral lines, HRCCS can precisely measure chemical abundance ratios, […]

HRCCS

Probing The Atmospheres Of Young Long-Period Sub-Neptune Progenitors With ELT/ANDES

Forward-modeling The Uncertainty Budget of High-resolution Spectroscopy of Exoplanet Atmospheres

NASA Establishes Mars Forward Operational Risk and Contamination Evaluation (M-FORCE) Tiger Team to Shape Mars Planetary Protection Protocols

Opportunity to Contribute to NASA DARES Community White Paper on Phototrophic Biosignatures

The Search For Life Elsewhere: Avoiding Hype and Fostering Public Understanding

Panchromatic Spectra of Nearby Low-mass and Sun-like Stars with Directly Imageable Habitable Zones

Alfred: A Flexible, User-Friendly Python Package for Exoplanet Confirmation