Search Publications
Erratum: Discovery of H I gas in a young radio galaxy at z = 0.44 using the Australian Square Kilometre Array Pathfinder
Forsyth, R.; Sault, R. J.; Heywood, I. +100 more
Discovery of two new fast X-ray transients with INTEGRAL: IGR J03346+4414 and IGR J20344+3913
Sidoli, L.; Bird, A. J.; Paizis, A. +1 more
We report on the discovery of two fast X-ray transients (FXTs) from analysis of archival INTEGRAL data. Both are characterized by a remarkable hard X-ray activity above 20 keV, in terms of duration (∼15 and 30 min, respectively), peak flux (∼10-9 erg cm-2 s-1) and dynamic range (∼2400 and 1360, respectively). Swift…
Searching for Faraday rotation in cosmic microwave background polarization
Battaner, E.; Ruiz-Granados, B.; Florido, E.
We use the Wilkinson Microwave Anisotropy Probe (WMAP) 9th-year foreground reduced data at 33, 41 and 61 GHz to derive a Faraday rotation at map and at angular power spectrum levels taking into account their observational errors. A processing mask provided by WMAP is used to avoid contamination from the disc of our Galaxy and local spurs. We have …
2D photochemical model for forbidden oxygen line emission for comet 1P/Halley
Gunell, H.; Rubin, M.; De Keyser, J. +8 more
We present here a 2D model of photochemistry for computing the production and loss mechanisms of the O(1S) and O(1D) states, which are responsible for the emission lines at 577.7, 630, and 636.4 nm, in case of the comet 1P/Halley. The presence of O2 within cometary atmospheres, measured by the in situ Rosetta and G…
A new investigation of the possible X-ray counterparts of the magnetar candidate AX J1845-0258
Pintore, Fabio; Mereghetti, Sandro
AX J1845-0258 is a transient X-ray pulsar, with spin period of 6.97 s, discovered with the ASCA satellite in 1993. Its soft spectrum and the possible association with a supernova remnant suggest that AX J1845-0258 might be a magnetar, but this has not been confirmed yet. A possible counterpart one order of magnitude fainter, AX J184453-025640, has…
ERRATUM: `The variable spin-down rate of the transient magnetar XTE J1810-197'
Pintore, Fabio; Mereghetti, Sandro; Esposito, Paolo +7 more
A benchmark of the He-like triplet for ions with 6 ≤ Z ≤ 14 in Maxwellian and non-Maxwellian plasmas
Gatuzz, E.; Bautista, M. A.; Mendoza, C. +1 more
After an extensive assessment of the effective collision strengths available to model the He-like triplet of C V, N VI, O VII, Ne IX, Mg XI and Si XIII in collisionally dominated plasmas, new accurate effective collision strengths are reported for Ne IX. The uncertainty intervals of the density and temperature diagnostics due to the atomic data er…
Discovery of a deep Seyfert-2 galaxy at z = 0.222 behind NGC 300
Gamen, R.; Combi, J. A.; García, F. +2 more
We report on the unveiling of the nature of the unidentified X-ray source 3XMM J005450.3-373849 as a Seyfert-2 galaxy located behind the spiral galaxy NGC 300 using Hubble Space Telescope data, new spectroscopic Gemini observations and available XMM-Newton and Chandra data. We show that the X-ray source is positionally coincident with an extended …
The clustering of the SDSS DR7 main Galaxy sample - I. A 4 per cent distance measure at z = 0.15
Howlett, Cullan; Manera, Marc; Ross, Ashley J. +3 more
We create a sample of spectroscopically identified galaxies with z < 0.2 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7), covering 6813 deg2. Galaxies are chosen to sample the highest mass haloes, with an effective bias of 1.5, allowing us to construct 1000 mock galaxy catalogues (described in Paper II), which we use to…
The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
Muzzin, Adam; Hoekstra, Henk; Babul, Arif +4 more
Masses of clusters of galaxies from weak gravitational lensing analyses of ever larger samples are increasingly used as the reference to which baryonic scaling relations are compared. In this paper we revisit the analysis of a sample of 50 clusters studied as part of the Canadian Cluster Comparison Project. We examine the key sources of systematic…