E
E. Kerins
Researcher at Liverpool John Moores University
Publications - 23
Citations - 803
E. Kerins is an academic researcher from Liverpool John Moores University. The author has contributed to research in topics: Gravitational microlensing & Population. The author has an hindex of 14, co-authored 23 publications receiving 793 citations. Previous affiliations of E. Kerins include University of Oxford.
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Journal ArticleDOI
Classical novae from the POINT-AGAPE microlensing survey of M31 - II. Rate and statistical characteristics of the nova population
M. J. Darnley,Michael F. Bode,E. Kerins,A. M. Newsam,Jin H. An,P. Baillon,Vasily Belokurov,S. Calchi Novati,Bernard Carr,M. Creze,M. Creze,Nick Evans,Y. Giraud-Heraud,Andrew Gould,Paul C. Hewett,Ph. Jetzer,J. Kaplan,S. Paulin-Henriksson,Stephen J. Smartt,Stephen J. Smartt,Yiannis Tsapras,M. J. Weston +21 more
TL;DR: In this article, an analysis of the maximum magnitude versus rate of decline (MMRD) relationship in M31 is performed using the resulting POINT-AGAPE CN catalogue, and good fits are produced to the MMRD in two filters.
Journal ArticleDOI
POINT-AGAPE pixel lensing survey of M31: Evidence for a MACHO contribution to galactic halos
S. Calchi Novati,S. Paulin-Henriksson,Jin H. An,P. Baillon,Vasily Belokurov,Bernard Carr,M. Creze,Nick Evans,Y. Giraud-Heraud,Andrew Gould,Paul C. Hewett,Ph. Jetzer,Jean Kaplan,E. Kerins,Stephen J. Smartt,Stephen J. Smartt,C. S. Stalin,Yiannis Tsapras,M. J. Weston +18 more
TL;DR: The POINT-AGAPE collaboration carried out a search for gravitational microlensing toward M31 to reveal galactic dark matter in the form of MACHOs (Massive Astrophysical Compact Halo Objects) in the halos of the Milky Way and M31 as discussed by the authors.
Journal ArticleDOI
The POINT-AGAPE survey: 4 high signal-to-noise microlensing candidates detected towards M 31
S. Paulin-Henriksson,P. Baillon,A. Bouquet,Bernard Carr,M. Creze,M. Creze,Nick Evans,Y. Giraud-Heraud,Andrew Gould,Andrew Gould,Paul C. Hewett,J. Kaplan,E. Kerins,Y. Le Du,A.L. Melchior,Stephen Smartt,David Valls-Gabaud +16 more
TL;DR: In this paper, a survey of the Andromeda galaxy for unresolved microlensing (pixel lensing) was carried out, and a subset of four short timescale, high signal-to-noise micro-lensing candidates were found by imposing severe selection criteria: the source flux variation exceeds the flux of an R = 21 magnitude star and the full width at half maximum timescale is less than 25 days.
Journal ArticleDOI
The POINT-AGAPE Survey - I. The variable stars in M31
Jin H. An,Nick Evans,Paul C. Hewett,P. Baillon,S. Calchi Novati,Bernard Carr,M. Creze,M. Creze,Y. Giraud-Heraud,Andrew Gould,Ph. Jetzer,J. Kaplan,E. Kerins,S. Paulin-Henriksson,Stephen J. Smartt,C. S. Stalin,Yiannis Tsapras +16 more
Abstract: For the purposes of identifying microlensing events, the POINT-AGAPE collaboration has been monitoring the Andromeda galaxy (M31) for three seasons (1999-2001) with the Wide Field Camera on the Isaac Newton Telescope. In each season, data are taken for one hour per night for roughly sixty nights during the six months that M31 is visible. The two 33 ′ ×33 ′ fields of view straddle the central bulge, northwards and sou thwards. We have calculated the locations, periods and brightness of 35414 variable stars i n M31 as a by-product of the microlensing search. The variables are classified according t o their period and brightness. Rough correspondences with classical types of variable star (suc h as population I and II Cepheids, Miras and semi-regular long-period variables) are established. The spatial distribution of population I Cepheids is clearly associated with the spiral arm s, while the central concentration of the Miras and long-period variables varies noticeably, t he brighter and the shorter period Miras being much more centrally concentrated. A crucial role in the microlensing experiment is played by the asymmetry signal ‐ the excess of events expected in the southern or more distant fiel ds as measured against those in the northern or nearer fields. It was initially assumed that t he variable star populations in M31 would be symmetric with respect to the major axis, and thus variable stars would not be a serious contaminant for measuring the microlensing asymmetry signal. We demonstrate that this assumption is not correct. All the variable star distributi ons are asymmetric primarily because of the effects of differential extinction associated with the dust lanes. The siz e and direction of the asymmetry of the variable stars is measured as a function of period and brightness. The implications of this discovery for the successful completi on of the microlensing experiments towards M31 are discussed.
Journal ArticleDOI
Classical novae from the POINT–AGAPE microlensing survey of M31 – I. The nova catalogue
M. J. Darnley,Michael F. Bode,E. Kerins,A. M. Newsam,Jin H. An,P. Baillon,S. Calchi Novati,Bernard Carr,M. Creze,M. Creze,Nick Evans,Y. Giraud-Heraud,Andrew Gould,Paul C. Hewett,Ph. Jetzer,J. Kaplan,S. Paulin-Henriksson,Stephen J. Smartt,C. S. Stalin,Yiannis Tsapras +19 more
TL;DR: The POINT-AGAPE (Pixel-lensing Observations with the Isaac Newton Telescope-Andromeda Galaxy Amplified Pixels Experiment) survey is an optical search for gravitational microlensing events towards the Andromeda galaxy (M31) as discussed by the authors.