Proposal ID | 009417 |
Title | Search for X--ray spectral features in two BL Lac Objects |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0094170101 |
DOI | https://doi.org/10.5270/esa-prsyshi |
Principal Investigator, PI | Dr Julian Krolik |
Abstract | We propose 20 ks XMM observations on each of the two X--ray bright BL Lac objects Mkn 180 and 1ES1517+656. Our primary aim is to study the strong soft X-ray absorption feaures that are sometimes seen in BL Lac objects (such as PKS 2155-304 and others). Our main scientific goals are (1) to begin determining how generic these features are in BL Lacs; and (2) to study these features in sufficient detail to determine their origin. Other benefits may also accrue, such as detecting intervening absorption, or providing a new way to measure BL Lac object redshifts. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2001-04-12T08:28:45Z/2001-04-12T16:37:53Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 | 2002-12-21T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "main scientific", "2155 304", "x ray spectral", "bl lac objects", "intervening absorption", "bl lacs", "XMM", "Mkn 180" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Julian Krolik, 2002, 'Search for X--ray spectral features in two BL Lac Objects', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-prsyshi |