A dataset provided by the European Space Agency

Name 020173
Title THE HYADES-AGE OPEN STAR CLUSTERS NGC 6633 AND IC 4756
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201730101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201730201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201730301

DOI 10.5270/esa-pwsoo62
Author Dr JOHN PYE
Description We propose deep EPIC surveys of the Hyades-age open star clusters NGC 6633 and IC 4756. These are the only such clusters with relatively small angular diameter (less than about 1 deg.) within 800 pc. The 50ks exposures will reach below the median X-ray luminosities seen in the Hyades, even for dM stars, and (1) allow definitive inter- and intra-cluster comparisons; (2) probe the magnetic dynamo down to at least mid-M in each cluster. The NGC 6633 observations will complement our ongoing optical programme; we have now surveyed the cluster to late-M. NGC 6633 is the most iron-poor of the Hyades-age clusters and hence the most crucial when looking for composition effects.
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The XMM-Newton serendipitou...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-10-10T03:49:22Z/2004-10-14T07:13:36Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2005-11-12T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-11-12T00:00:00Z, 020173, 17.56_20190403_1200. https://doi.org/10.5270/esa-pwsoo62