# University of Hertfordshire

## The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky

Research output: Contribution to journalArticle

### Standard

The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles : The Largest Herschel Survey of the Extragalactic Sky. / Smith, Matthew W. L.; Ibar, Edo; Maddox, Steve J.; Valiante, Elisabetta; Dunne, Loretta; Eales, Stephen; Dye, Simon; Furlanetto, Christina; Bourne, Nathan; Cigan, Phil; Ivison, Rob J.; Gomez, Haley; Smith, Daniel J. B.; Viaene, Sébastien.

In: Astrophysical Journal, Supplement Series, Vol. 233, No. 26, 26, 21.12.2017.

Research output: Contribution to journalArticle

### Harvard

Smith, MWL, Ibar, E, Maddox, SJ, Valiante, E, Dunne, L, Eales, S, Dye, S, Furlanetto, C, Bourne, N, Cigan, P, Ivison, RJ, Gomez, H, Smith, DJB & Viaene, S 2017, 'The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky', Astrophysical Journal, Supplement Series, vol. 233, no. 26, 26. https://doi.org/10.3847/1538-4365/aa9b35

### Author

Smith, Matthew W. L. ; Ibar, Edo ; Maddox, Steve J. ; Valiante, Elisabetta ; Dunne, Loretta ; Eales, Stephen ; Dye, Simon ; Furlanetto, Christina ; Bourne, Nathan ; Cigan, Phil ; Ivison, Rob J. ; Gomez, Haley ; Smith, Daniel J. B. ; Viaene, Sébastien. / The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles : The Largest Herschel Survey of the Extragalactic Sky. In: Astrophysical Journal, Supplement Series. 2017 ; Vol. 233, No. 26.

### Bibtex

@article{2c84af86554340f28c690768a4b23ee9,
title = "The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky",
abstract = "We present the largest submillimeter images that have been made of the extragalactic sky. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg$^2$ with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500{\mu}m. In this paper we present the images from our two largest fields which account for ~75{\%} of the survey. The first field is 180.1 deg$^2$ in size centered on the North Galactic Pole (NGP) and the second field is 317.6 deg$^2$ in size centered on the South Galactic Pole. The NGP field serendipitously contains the Coma cluster. Over most (~80{\%}) of the images, the pixel noise, including both instrumental noise and confusion noise, is approximately 3.6, and 3.5 mJy/pix at 100 and 160{\mu}m, and 11.0, 11.1 and 12.3 mJy/beam at 250, 350 and 500{\mu}m, respectively, but reaches lower values in some parts of the images. If a matched filter is applied to optimize point-source detection, our total 1{\sigma} map sensitivity is 5.7, 6.0, and 7.3 mJy at 250, 350, and 500{\mu}m, respectively. We describe the results of an investigation of the noise properties of the images. We make the most precise estimate of confusion in SPIRE maps to date finding values of 3.12+/-0.07, 4.13+/-0.02 and 4.45+/-0.04 mJy/beam at 250, 350, and 500{\mu}m in our un-convolved maps. For PACS we find an estimate of the confusion noise in our fast-parallel observations of 4.23 and 4.62 mJy/beam at 100 and 160{\mu}m. Finally, we give recipes for using these images to carry out photometry, both for unresolved and extended sources.",
keywords = "astro-ph.GA, astro-ph.IM",
author = "Smith, {Matthew W. L.} and Edo Ibar and Maddox, {Steve J.} and Elisabetta Valiante and Loretta Dunne and Stephen Eales and Simon Dye and Christina Furlanetto and Nathan Bourne and Phil Cigan and Ivison, {Rob J.} and Haley Gomez and Smith, {Daniel J. B.} and S{\'e}bastien Viaene",
note = "{\circledC} 2018 The American Astronomical Society. All rights reserved. 6 Pages, 14 Figures. Submitted to ApJS July 2017, accepted November 2017",
year = "2017",
month = "12",
day = "21",
doi = "10.3847/1538-4365/aa9b35",
language = "English",
volume = "233",
journal = "Astrophysical Journal, Supplement Series",
issn = "0067-0049",
publisher = "IOP Publishing Ltd.",
number = "26",

}

### RIS

TY - JOUR

T1 - The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles

T2 - The Largest Herschel Survey of the Extragalactic Sky

AU - Smith, Matthew W. L.

AU - Ibar, Edo

AU - Valiante, Elisabetta

AU - Dunne, Loretta

AU - Eales, Stephen

AU - Dye, Simon

AU - Furlanetto, Christina

AU - Bourne, Nathan

AU - Cigan, Phil

AU - Ivison, Rob J.

AU - Gomez, Haley

AU - Smith, Daniel J. B.

AU - Viaene, Sébastien

N1 - © 2018 The American Astronomical Society. All rights reserved. 6 Pages, 14 Figures. Submitted to ApJS July 2017, accepted November 2017

PY - 2017/12/21

Y1 - 2017/12/21

N2 - We present the largest submillimeter images that have been made of the extragalactic sky. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg$^2$ with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500{\mu}m. In this paper we present the images from our two largest fields which account for ~75% of the survey. The first field is 180.1 deg$^2$ in size centered on the North Galactic Pole (NGP) and the second field is 317.6 deg$^2$ in size centered on the South Galactic Pole. The NGP field serendipitously contains the Coma cluster. Over most (~80%) of the images, the pixel noise, including both instrumental noise and confusion noise, is approximately 3.6, and 3.5 mJy/pix at 100 and 160{\mu}m, and 11.0, 11.1 and 12.3 mJy/beam at 250, 350 and 500{\mu}m, respectively, but reaches lower values in some parts of the images. If a matched filter is applied to optimize point-source detection, our total 1{\sigma} map sensitivity is 5.7, 6.0, and 7.3 mJy at 250, 350, and 500{\mu}m, respectively. We describe the results of an investigation of the noise properties of the images. We make the most precise estimate of confusion in SPIRE maps to date finding values of 3.12+/-0.07, 4.13+/-0.02 and 4.45+/-0.04 mJy/beam at 250, 350, and 500{\mu}m in our un-convolved maps. For PACS we find an estimate of the confusion noise in our fast-parallel observations of 4.23 and 4.62 mJy/beam at 100 and 160{\mu}m. Finally, we give recipes for using these images to carry out photometry, both for unresolved and extended sources.

AB - We present the largest submillimeter images that have been made of the extragalactic sky. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg$^2$ with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500{\mu}m. In this paper we present the images from our two largest fields which account for ~75% of the survey. The first field is 180.1 deg$^2$ in size centered on the North Galactic Pole (NGP) and the second field is 317.6 deg$^2$ in size centered on the South Galactic Pole. The NGP field serendipitously contains the Coma cluster. Over most (~80%) of the images, the pixel noise, including both instrumental noise and confusion noise, is approximately 3.6, and 3.5 mJy/pix at 100 and 160{\mu}m, and 11.0, 11.1 and 12.3 mJy/beam at 250, 350 and 500{\mu}m, respectively, but reaches lower values in some parts of the images. If a matched filter is applied to optimize point-source detection, our total 1{\sigma} map sensitivity is 5.7, 6.0, and 7.3 mJy at 250, 350, and 500{\mu}m, respectively. We describe the results of an investigation of the noise properties of the images. We make the most precise estimate of confusion in SPIRE maps to date finding values of 3.12+/-0.07, 4.13+/-0.02 and 4.45+/-0.04 mJy/beam at 250, 350, and 500{\mu}m in our un-convolved maps. For PACS we find an estimate of the confusion noise in our fast-parallel observations of 4.23 and 4.62 mJy/beam at 100 and 160{\mu}m. Finally, we give recipes for using these images to carry out photometry, both for unresolved and extended sources.

KW - astro-ph.GA

KW - astro-ph.IM

U2 - 10.3847/1538-4365/aa9b35

DO - 10.3847/1538-4365/aa9b35

M3 - Article

VL - 233

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

SN - 0067-0049

IS - 26

M1 - 26

ER -