# HEROES: The Hawaii eROSITA Ecliptic Pole Survey Catalog

## TL;DR

The HEROES survey provides a comprehensive, multi-band optical catalog of over 25 million objects in the North Ecliptic Pole, facilitating future multi-wavelength astronomical studies.

## Contribution

This paper introduces the HEROES catalog, derived from Subaru HSC imaging, with detailed data reduction and multiple catalog formats for broad scientific use.

## Key findings

- Over 25 million objects cataloged in seven bands
- Deep imaging reaching median 5-sigma depths of up to 26.5 mag
- Catalog designed for multi-wavelength astronomical research

## Abstract

We present a seven band (g, r, i, z, y, NB816, NB921) catalog derived from a Subaru Hyper Suprime-Cam (HSC) imaging survey of the North Ecliptic Pole (NEP). The survey, known as HEROES, consists of 44 sq. deg of contiguous imaging reaching median 5-sigma depths of g: 26.5, r: 26.2, i: 25.7, z: 25.1, y: 23.9, NB816: 24.4, NB921: 24.4 mag. We reduced these data with the HSC pipeline software hscPipe, and produced a resulting multiband catalog containing over 25 million objects. We provide the catalog in three formats: (1) a collection of hscPipe format forced photometry catalogs, (2) a single combined catalog containing every object in that dataset with selected useful columns, and (3) a smaller variation of the combined catalog with only essential columns for basic analysis or low memory machines. The catalog uses all the available HSC data on the NEP and may serve as the primary optical catalog for current and future NEP deep fields from instruments and observatories such as SCUBA-2, eROSITA, Spitzer, Euclid, and JWST.