We present new follow-up observations of the sub-mm luminous Ly α-emitting object in the SSA22 z = 3.09 galaxy overdensity, referred to as 'Blob 1' by Steidel et al. (2000). In particular we discuss high resolution Hubble Space Telescope optical imaging, Owens Valley Radio Observatory spectral imaging, Keck spectroscopy, VLA 20 cm radio continuum imaging, and Chandra X-ray observations. We also...

We propose a method to obtain accurate absolute astrometry of Hubble Space Telescope images. Ground based images are used to linkHST images to standard astrometric stars defining the optical frame of reference. The method has been used to register optical images of the Seyfert 2 galaxy NGC 5929 to the corresponding radio maps, allowing the exploration of the relationship between radio and optic...

We present infrared observations at wavelengths of 60 and 100 μm and contemporaneous radio (five frequencies) and optical (R band) monitoring of the BL Lac object 2007+777. During a three-week campaign with the ISO1 spacecraft, the VLA2, the Effelsberg 100 m radio telescope, and optical telescopes in Heidelberg and on Calar Alto, Spain3, we observed variability on time scales of a few days at 1...

In recent years, deep learning has been successfully applied in various scientific domains. Following these promising results and performances, it recently also started being evaluated the domain of radio astronomy. particular, since astronomy is entering Big Data era, with advent largest telescope world - Square Kilometre Array (SKA), task automatic object detection instance segmentation cruci...

In the local Universe, high-power radio galaxies live in lower density environments than lowluminosity radio galaxies. If this trend continues to higher redshifts, powerful radio galaxies would serve as efficient probes of moderate redshift groups and poor clusters. Photometric studies of radio galaxies at 0.3 . z . 0.5 suggest that the radio luminosity-environment correlation disappears at mod...

Numerous ubiquitous computing applications depend on the ability to locate objects as a key functionality. We show that Radio Frequency Identification (RFID) technology can be leveraged to achieve object localisation in an inexpensive, reliable, flexible, and scalable manner. We outline the challenges that can adversely affect RFID-based localisation techniques, and propose practical mitigating...

We report the detection of optical and ultraviolet emission from the kiloparsec scale jet of the well-known quasar 3C 279. A bright knot, discovered in archival V and U band Hubble Space Telescope Faint Object Camera images, is coincident with a peak in the radio jet ∼0.6 from the nucleus. The detection was also confirmed in Wide Field Planetary Camera-2 images. Archival Very Large Array and ME...