Targeted deep surveys of high Galactic latitude HI with the GBT

TL;DR

This paper presents extensive 21 cm HI surveys of high Galactic latitude regions using the GBT, improving beam knowledge and mapping both dense and low-density areas, including targeted fields like ELAIS N1.

Contribution

It provides a detailed high-latitude HI survey with improved beam calibration, covering diverse regions including low-density and dynamically interesting areas.

Findings

Mapped over 800 sq. deg. of high Galactic latitude sky.

Achieved reliable mapping of low HI column density regions.

Included targeted observations of the ELAIS N1 field.

Abstract

Over 800 sq. deg. of high Galactic latitude sky have been mapped at 21 cm with the Robert C. Byrd Green Bank Telescope (GBT). An improved knowledge of the telescope's beam characteristics has allowed us to reliably map not only regions of high column density, but also such regions as ELAIS N1, a targeted Spitzer field, which have very low HI column density. The additional fields we have observed cover a cross-section of dynamically and chemically interesting regions as indicated by the presence of intermediate/high velocity gas and/or anomalous far-IR (dust) colour.