- ID:
- ivo://CDS.VizieR/J/AJ/146/62
- Title:
- HERschel HERITAGE in Magellanic Clouds
- Short Name:
- J/AJ/146/62
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an overview of the HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) in the Magellanic Clouds project, which is a Herschel Space Observatory open time key program. We mapped the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) at 100, 160, 250, 350, and 500{mu}m with the Spectral and Photometric Imaging Receiver (SPIRE) and Photodetector Array Camera and Spectrometer (PACS) instruments on board Herschel using the SPIRE/PACS parallel mode. The overriding science goal of HERITAGE is to study the life cycle of matter as traced by dust in the LMC and SMC. The far-infrared and submillimeter emission is an effective tracer of the interstellar medium (ISM) dust, the most deeply embedded young stellar objects (YSOs), and the dust ejected by the most massive stars. We describe in detail the data processing, particularly for the PACS data, which required some custom steps because of the large angular extent of a single observational unit and overall the large amount of data to be processed as an ensemble. We report total global fluxes for the LMC and SMC and demonstrate their agreement with measurements by prior missions. The HERITAGE maps of the LMC and SMC are dominated by the ISM dust emission and bear most resemblance to the tracers of ISM gas rather than the stellar content of the galaxies. We describe the point source extraction processing and the criteria used to establish a catalog for each waveband for the HERITAGE program. The 250{mu}m band is the most sensitive and the source catalogs for this band have ~25,000 objects for the LMC and ~5500 objects for the SMC. These data enable studies of ISM dust properties, submillimeter excess dust emission, dust-to-gas ratio, Class 0 YSO candidates, dusty massive evolved stars, supernova remnants (including SN1987A), HII regions, and dust evolution in the LMC and SMC. All images and catalogs are delivered to the Herschel Science Center as part of the community support aspects of the project. These HERITAGE images and catalogs provide an excellent basis for future research and follow up with other facilities.
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- ID:
- ivo://CDS.VizieR/VIII/103
- Title:
- Herschel Multi-tiered Extragalactic Survey
- Short Name:
- VIII/103
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- HerMES is the Herschel Multi-tiered Extragalactic Survey, an astronomical project to study the evolution of galaxies in the distant Universe.It is the largest project on ESA's Herschel Space Observatory (900 hours). You will find more information about it on the HerMES website (http://hedam.lam.fr/HerMES/). The project is carried out by a large team, made up primarily of people who built one of the instruments on Herschel called SPIRE.
- ID:
- ivo://CDS.VizieR/VIII/95
- Title:
- Herschel Multi-tiered Extragalactic Survey
- Short Name:
- VIII/95
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Herschel Multi-tiered Extragalactic Survey (HerMES) is a legacy programme designed to map a set of nested fields totalling ~380deg^2^. Fields range in size from 0.01 to ~20deg^2^, using the Herschel-Spectral and Photometric Imaging Receiver (SPIRE) (at 250, 350 and 500um) and the Herschel-Photodetector Array Camera and Spectrometer (PACS) (at 100 and 160um), with an additional wider component of 270deg^2^ with SPIRE alone. These bands cover the peak of the redshifted thermal spectral energy distribution from interstellar dust and thus capture the reprocessed optical and ultraviolet radiation from star formation that has been absorbed by dust, and are critical for forming a complete multiwavelength understanding of galaxy formation and evolution.
- ID:
- ivo://CDS.VizieR/VIII/106
- Title:
- Herschel/PACS Point Source Catalogs
- Short Name:
- VIII/106
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- The Herschel Space Observatory was the fourth cornerstone mission in the European Space Agency (ESA) science programme. It had excellent broad band imaging capabilities in the far-infrared (FIR) and sub-millimetre part of the electromagnetic spectrum. Although the spacecraft finished observing in 2013, it left a large legacy dataset that is far from having been fully explored and still has a great potential for new scientific discoveries. The PACS and SPIRE photometric cameras observed about 8% of the sky in six different wavebands. This document describes the Herschel/PACS Point Source Catalogue (HPPSC), a FIR catalogue based on the broad-band photometric observations of the PACS instrument with filters centred at 70, 100 and 160um. We analysed all combined, Level 2.5/Level 3 Herschel/PACS photometric observations including 682 Parallel Mode, 12932 nominal mode and 1644 SSO maps. The PACS photometer maps that we produced were generated by applying the JScanam task of the Herschel Interactive Processing Environment (HIPE) v13.0.0. Sources were identified with the HIPE implementation of SUSSEXtractor, and the flux densities obtained by aperture photometry. We found a total of 108319 point sources that are considered to be reliable in the 70um maps, 131322 at 100um and 251392 point sources in the 160um maps. In addition, our quality control algorithm identified 546587 candidate sources that were found to be extended and 7185160 features which did not pass the signal-to-noise and other criteria to be considered reliable sources. These sources were included in the Extended Source List and Rejected Source List of the HPPSC, respectively. The calculated completeness and photometric accuracy values are based on simulations, where artificial sources were injected into the observational timeline with well controlled flux density values. The actual completeness is a complex function of the source flux, photometric band and the background complexity.
- ID:
- ivo://CDS.VizieR/J/ApJS/210/22
- Title:
- Herschel Stripe 82 survey (HerS) first catalog
- Short Name:
- J/ApJS/210/22
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the first set of maps and band-merged catalog from the Herschel Stripe 82 Survey (HerS). Observations at 250, 350, and 500{mu}m were taken with the Spectral and Photometric Imaging Receiver (SPIRE) instrument aboard the Herschel Space Observatory. HerS covers 79deg^2^ along the SDSS Stripe 82 to an average depth of 13.0, 12.9, and 14.8mJy/beam (including confusion) at 250, 350, and 500{mu}m, respectively. HerS was designed to measure correlations with external tracers of the dark matter density field --either point-like (i.e., galaxies selected from radio to X-ray) or extended (i.e., clusters and gravitational lensing)-- in order to measure the bias and redshift distribution of intensities of infrared-emitting dusty star-forming galaxies and active galactic nuclei. By locating HerS in Stripe 82, we maximize the overlap with available and upcoming cosmological surveys. The band-merged catalog contains 3.3x10^4^ sources detected at a significance of >~3{sigma} (including confusion noise).
