HeDaM Information System - HerMES data
Welcome to the section of the Herschel Database in Marseille hosting
the public data from the Herschel Multi-tiered Extragalactic Survey.
HerMES is the largest extragalactic survey on the
Herschel Space Observatory. For
more information on this survey, please visit
the HerMES website.
In HeDaM, you will find both tabular data (catalogues) and image maps. There
are four ways to access these data (second menu on the left side of this page):
- The HerMES data is divided in various datasets; you can download the
archive files for each dataset in the "Data download"
section;
- You can browse the data directly in you browser and display the tables in
the "Data browser" section (soon);
- You can perform a cone search on the entire HeDaM
database at once, returning the resulting catalogue subsets as well as image map
cut-outs;
- At last, you may also search for a list of
targets in all the HerMES data at once.
April 3rd, 2012 - First Data Release
We in the HerMES team are very pleased to announce our first major data
release, DR1.
This release includes Herschel SPIRE sky maps and object catalogues. The
maps were made using 250, 350 and 500 µm filters. These sub-milimeter
wavelengths had not been significantly exploited before the Herschel Mission.
The maps cover ~74 deg^2 of the sky, i.e. a volume of 6.6e8 (Mpc)^3 for z<1.5
(and many of the galaxies that we see are expected to be at z>1.5) q.v. the SDSS
which maps a volume of 3.5e8 (Mpc)^3 for z<0.17. We are releasing data in many
very well studied extragalactic survey fields and so we expect this will
facilitate a huge range of astrophysics and cosmology.
The maps range in depth but are mostly at or below the SPIRE confusion limit
and so provide a very high quality view of the sub-millimeter sky, limited
primarily by the diameter of the Herschel mirror.
The catalogues extracted from these maps include over 50, 000 catalogue entries,
representing over 17,000 galaxies. Extensive simulations have demonstrated that
these catalogues are very high quality and ~90% of the point-like galaxies
having very reliable positions and flux measurements.
This data release follows two early data releases (July 2010 and September
2011) which were limited to the brightest catalogued sources over a smaller
range of fields.
