Herschel all sky viewer

Over the last few days I have been working on an all sky viewer for the Herschel Extragalactic Legacy Project (HELP). The easiest way to view it is to look at it through the dedicated viewer here:


There you can click on objects in the HELP ‘A list’ and see their spectral energy distributions and have links to the full measurements from the Virtual Observatory at susseX (VOX). I’ll write some more about that another day. You can also view the individual elements using Aladin Desktop. Details of how to do so are here.

I think we can improve this site so please let me know any issues you have with it. It would be good to optimise it and work on viewing though a phone. You can also embed the viewer in websites such as below:

It is a great way to easily visualise all the data we have made over the last few years and we will continue to develop it with new datasets as we make them.

Herschel ten years after launch

Over the last two days I have been attending a celebration of the ten year anniversary (1512h 14 May 2008) of the the launch of the Herschel space observatory. It has been a pleasure to visiting the European Space Astronomy Centre just outside Madrid. The centre is dotted with numerous models of European Space Agency telescopes.

I gave a short talk on the Herschel Extragalactic Legacy Project (HELP) that I have been working on for the last few years. You can download the talk here. you can also see a full video of all the talks (my talk starts at 2:19:33):

Herschel was launched together with Planck. There is still an ongoing connection between the two instruments and it was fascinating to see the engineering behind launching two satellites together.

It was inspiring to see the great range of science that was done with the instrument. I have to admit I knew very little about the aspects outside my own field of extragalactic astronomy (extraextragalactic?). The whole enterprise has been ongoing for around thirty years and clearly occupied the large part of a number of people’s careers. It is testament o their hard work that the data is still leading to new scientific results.

The Herschel Extragalactic Legacy Project (HELP) – beta data release

“Is it not curious, that so vast a being as the whale should see the world through so small an eye, and hear the thunder through an ear which is smaller than a hare’s? But if his eyes were broad as the lens of Herschel’s great telescope; and his ears capacious as the porches of cathedrals; would that make him any longer of sight, or sharper of hearing? Not at all.- Why then do you try to “enlarge” your mind? Subtilize it.” – Moby Dick.

For the last year I have been working on the Herschel Extragalactic Legacy Project (HELP), an EU funded project to use far infrared imaging from the Herschel Space Observatory to understand galaxy formation and evolution. We are gearing up for our first data release, DR1 on 1 October but we are making a lot of the data available now for beta testing.

We are very keen for the astronomical community to start using this huge dataset comprising 170 million galaxies over 1270 square degrees of extragalactic sky and indeed using and developing the code used to produce it. We have released all the code to perform the reduction on GitHub in the spirit of open science and reproducibility. The data can be accessed as raw data files from the Herschel Database at Marseille (HeDaM) and queried from a dedicated Virtual Observatory server. Although Herschel imaging has been the main focus of the project, we have taken public data from many different instruments spanning all the way for ultraviolet to radio data. Tying together these different data sets is a major challenge and will be required to make the most of the upcoming wide surveys such as from the Large synoptic Survey Telescope (optical), the Euclid space telescope (optical) and the Square Kilometre Array (radio).

We are also in the process of setting up mirrors here at Sussex and I plan to blog more about that soon. There is a vast amount of data and we are working on squeezing every last ounce of science out of all the public data from a wide array of different instruments which make up the full multi-wavelength data we have collated.

If you have any questions about how to use this database please leave a comment or email me.