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We analyse the first publicly released deep field of the UKIDSS Deep eXtragalactic Survey (DXS) to identify candidate galaxy over-densities at z~1 across ~1 sq. degree in the ELAIS-N1 field. Using I-K, J-K and K-3.6um colours we identify and spectroscopically follow-up five candidate structures with Gemini/GMOS and confirm they are all true over-densities with between five and nineteen members each. Surprisingly, all five structures lie in a narrow redshift range at z=0.89+/-0.01, although they are spread across 30Mpc on the sky. We also find a more distant over-density at z=1.09 in one of the spectroscopic survey regions. These five over-dense regions lying in a narrow redshift range indicate the presence of a supercluster in this field and by comparing with mock cluster catalogs from N-body simulations we discuss the likely properties of this structure. Overall, we show that the properties of this supercluster are similar to the well-studied Shapley and Hercules superclusters at lower redshift., Comment: In press at MNRAS, 11 pages, 5 figures

Deep spectroscopy of the two Leiden-Berkeley Deep Survey mJy radio galaxies LBDS 53W069 and 53W091 has previously shown them to have old (≳3 Gyr) stellar populations at z ≃ 1.5. Here we present the results of Hubble Space Telescope (HST) observations with the Wide Field and Planetary Camera 2 (WFPC2) in F814W and with the Near-Infrared Camera and Multi-Object Spectrograph (NICMOS) in F110W. We find that 53W069 has a de Vaucouleurs r1/4 profile in both the F814W and F110W data, with a mean effective radius of 0.30±0.06 arcsec (2.7±0.5 kpc). The rest-frame U - B colour gradient is consistent with that of present-day ellipticals, requiring a stellar population of supersolar (3 Z⊙) metallicity that formed on a very short time-scale at high redshift (z > 5). 53W091 has a regular r1/4 profile in F110W with an effective radius of 0.32 ± 0.08 arcsec (2.9 ± 0.7 kpc). The F814W profile is more extended and is consistent with the presence of a blue exponential disc that contributes 20 ± 10 per cent of the flux within re. We find a rest-frame U - B colour gradient that is significantly larger than that observed in field ellipticals at z ≤ 1, implying a stellar population of mixed metallicity (1-3 Z⊙) that formed in a high-redshift rapid burst. We have compared these two LBDS radio galaxies with the Kormendy relations often 3CR radio galaxies at z ≃ 0.8 and a sample of cluster ellipticals at z ∼ 0.4. The LBDS galaxies follow the Kormendy relation for the more radio-luminous 3CR galaxies, assuming passive evolution of their stellar populations, although they are smaller than the 3CR galaxies whose mean effective radius is 12 kpc. Their sizes and radio luminosities are consistent with scaling relations applied to the 3CR galaxies, in which both radio power and effective radius scale with galaxy mass. Compared with the sample of cluster ellipticals, 53W069 and 53W091 lie well within the scatter of the Kormendy relation. We conclude that the hosts of these millijansky radio sources at z ≃ 1.5 are passively evolving elliptical galaxies that will evolve into ordinary L* ellipticals by the present day.

First paragraph: Much of the discussion about the legal relationship between athletes and anti-doping regimes has focussed on the application of what is invariably, although somewhat loosely, referred to as the ‘strict liability principle’, and this paper is concerned with the application of this principle in the context of nutritional supplement use (for more general discussion of its application see Charlish, 2012; Anderson, 2013). The principle’s significance lie in the fact that domestic courts worldwide (for example those of England and Wales in Korda v ITF, The Times 4 February 1999), the Court of Justice of the European Union (Meca-Medina v Commission [2006] 5 CMLR 18) and the Court of Arbitration for Sport (USA Shooting and Quigley v Union Internationale de Tir CAS 94/129) have accepted that the relationship between an athlete and the governing body is contractual and that even if there is no written agreement between the parties, the existence of that contract can be discerned from the parties’ dealings with one another. As part of this contractual relationship, athletes are deemed to have accepted the provisions of the WADA Code, both in terms of the substantive provisions of what substances are banned and the sanctions that can be imposed for violation of the rules. The procedural provisions that deal with the conduct of anti-doping tribunals and the potential right of appeal to the CAS are also incorporated into this contract.