dc.contributor.author | Brassington, Nicola | |
dc.contributor.author | Fabbiano, G. | |
dc.contributor.author | Kim, D.-W. | |
dc.contributor.author | Zezas, A. | |
dc.contributor.author | Zepf, S. | |
dc.contributor.author | Kundu, A. | |
dc.contributor.author | Angelini, L. | |
dc.contributor.author | Davies, R. L. | |
dc.contributor.author | Gallagher, J. | |
dc.contributor.author | Kalogera, V. | |
dc.contributor.author | Fragos, T. | |
dc.contributor.author | King, A.R. | |
dc.contributor.author | Pellegrini, S. | |
dc.contributor.author | Trinchieri, G. | |
dc.date.accessioned | 2012-04-03T08:01:04Z | |
dc.date.available | 2012-04-03T08:01:04Z | |
dc.date.issued | 2009-04-01 | |
dc.identifier.citation | Brassington , N , Fabbiano , G , Kim , D-W , Zezas , A , Zepf , S , Kundu , A , Angelini , L , Davies , R L , Gallagher , J , Kalogera , V , Fragos , T , King , A R , Pellegrini , S & Trinchieri , G 2009 , ' Deep Chandra Monitoring Observations of NGC 4278 : Catalog of Source Properties ' , Astrophysical Journal, Supplement Series , vol. 181 , pp. 605-626 . https://doi.org/10.1088/0067-0049/181/2/605 | |
dc.identifier.issn | 0067-0049 | |
dc.identifier.other | PURE: 701828 | |
dc.identifier.other | PURE UUID: 02470fde-3e09-4d9a-a8f0-a9f155e91a22 | |
dc.identifier.other | Bibtex: urn:067718b3844cbc1d6fa27d1112f756fe | |
dc.identifier.other | Scopus: 70549097747 | |
dc.identifier.uri | http://hdl.handle.net/2299/8154 | |
dc.description.abstract | We present the properties of the discrete X-ray sources detected in our monitoring program of the globular cluster (GC) rich elliptical galaxy, NGC 4278, observed with Chandra ACIS-S in six separate pointings, resulting in a co-added exposure of 458 ks. From this deep observation, 236 sources have been detected within the region overlapped by all observations, 180 of which lie within the D 25 ellipse of the galaxy. These 236 sources range in L X from 3.5 × 1036 erg s-1 (with 3σ upper limit <=1 × 1037 erg s-1) to ~2 × 1040 erg s-1, including the central nuclear source which has been classified as a LINER. From optical data, 39 X-ray sources have been determined to be coincident with a GC, these sources tend to have high X-ray luminosity, with 10 of these sources exhibiting L X > 1 × 1038 erg s-1. From X-ray source photometry, it has been determined that the majority of the 236 point sources that have well-constrained colors have values that are consistent with typical low-mass X-ray binary spectra, with 29 of these sources expected to be background objects from the log N-log S relation. There are 103 sources in this population that exhibit long-term variability, indicating that they are accreting compact objects. Three of these sources have been identified as transient candidates, with a further three possible transients. Spectral variations have also been identified in the majority of the source population, where a diverse range of variability has been identified, indicating that there are many different source classes located within this galaxy. | en |
dc.format.extent | 22 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal, Supplement Series | |
dc.subject | galaxies: individual: NGC 4278, X-rays: binaries, X-rays: galaxies | |
dc.title | Deep Chandra Monitoring Observations of NGC 4278 : Catalog of Source Properties | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.version | SMUR | |
rioxxterms.versionofrecord | https://doi.org/10.1088/0067-0049/181/2/605 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |