... Giant radio galaxies - Tracers of large-scale structure . by Jurek Malarecki (ICRAR/UWA) . ... The lobes of this radio galaxy extend well over 1 Mpc, making this object a true giant of the Universe. ... The observations are part of a study of the interaction between the lobes of 19 giant radio galaxies and the Warm-Hot Intergalactic Medium (WHIM). The results indicate that giant radio lobes are preferentially found to propagate towards regions of lower galaxy density. ... today * ATNF | ...
. 3rd of August 2015 . Pulsar school at Parkes . by Simon Johnston (CASS) . Charlotte Ward, one of our summer students in the 2014/15 program, enjoyed studying pulsars so much she decided to go to the International Pulsar Timing Array (IPTA) student school held at the 64-m Parkes telescope last week. Her story was written up in the Parkes Champion Post . Photo credit: John Sarkissian . RSS feed generated by Page2RSS . | archive | about | today * ATNF | Parkes | ATCA | Mopra | VLBI | ASKAP | .
... The radio view of the Seyfert galaxy PKS 2004-447 . ... The Fermi gamma-ray satellite has identified over 1500 gamma-ray sources with other galaxies. The majority are classified as flat-spectrum radio quasars, or BL Lacerate objects: just a handful have been identified with narrow-line Seyfert galaxies. ... These characteristics are extremely rare among gamma-ray loud AGN. Reference: "The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. ... today * ATNF | ...
... Examining the rich detail of a simulated ASKAP wide-field image . ... In this photo, Matthew Whiting (left) and Maxim Voronkov (right) are examining a simulated ASKAP image on CSIRO's OptiPortal. This allows them to see the entire 5500 x 5500 pixel image at once, at full resolution. Note that a full 36-beam ASKAP image will be four times this size. ... This and other simulations of ASKAP observations can be found here . ... today * ATNF | ... ASKAP | ...
... 2014 Science Highlights . The kinematics and orbital dynamics of the PSR B1259-63 / LS 2883 system from 23 yr of pulsar timing . Shannon, Johnston Manchester (2014) present an analysis of 23 yr of pulse arrival times for PSR B1259-63 with the 64-m Parkes Telescope. The pulsar is in a binary orbit about its approximately 20 Msun companion LS 2883. ... ATNF Science Highlights from refereed publications during 2014. | ... today * ATNF | ...
. 3rd of July 2015 . Erik Lensson - happy retirement ! . Photo by John Sarkissian (CASS) . All the best to Erik Lensson (pictured) who retired at the end of June. With no further delay, he's on his way to go fishing in Lapland. We wish him well and all the best for the future. RSS feed generated by Page2RSS . | archive | about | today * ATNF | Parkes | ATCA | Mopra | VLBI | ASKAP | .
... The Bluedisks project: a study of unusually HI-rich galaxies . ... The advantage of the sample is that all the target galaxies lie beyond a luminosity distance of 100 Mpc, and we fully sample the HI environment within a projected distance of ~1 Mpc (with the ~1 deg primary beam) and systematic velocity of more than 500 km/s around the target galaxies. ... today * ATNF | ...
3rd of March 2015 . 2015 ATNF Observing Schedules . The ATNF observing schedules for the 2015 April semester are now available on-line. All ATNF observations are carried out by the observers from the Science Operations Center (SOC), located at the ATNF Headquarters in Sydney, unless permission to observe remotely has been granted (generally to experienced observers who have recently observed from the SOC). ... today * ATNF | ... ATCA | ...
. 3rd of May 2015 . Happy Birthday, Simon ! . by B rbel Koribalski (CASS) . One of the best pulsar conferences was held in Krabi, Thailand, with about 100 participants from around the world: "Pulsar searching and Thai-ming" . - Can you spot Simon in this animated group photo ? - Photo credit: Busaba Kramer and the LOC. | archive | about | today * ATNF | Parkes | ATCA | Mopra | VLBI | ASKAP | .
... Deep Radio and X-Ray observations of Pictor A . ... A study of deep observations of Pictor A in radio with the Australia Telescope Compact Array (ATCA) and in X-rays with the Chandra X-ray observatory over a time span of 15 years has just been accepted for publication in Monthly Notices: Hardcastle et al. ... This has provided further evidence of time variability in the jet and confirmed previous tentative evidence of a counter-jet. ... today * ATNF | ... ATCA | ...
. 3rd of October 2015 . Twilight under the stars at the Australia Telescope Compact Array . by Karen Hodge (Narrabri) . It all happens after sunset at the Australia Telescope Compact Array (ATCA) scientific facility near Narrabri, NSW. Credits: Karen Hodge Photography . RSS feed generated by Page2RSS . | archive | about | today * ATNF | Parkes | ATCA | Mopra | VLBI | ASKAP | .
3rd of September 2015 . ATLAS Third Data Release . ... The Australia Telescope Large Area Survey (ATLAS) is a deep 1.4 GHz radio continuum survey with ATCA. ... The survey covers a total area of 6.3 deg2 to a typical rms noise level of 15 microJy/beam. ... Franzen et al. (2015) present the survey in detail, together with a catalogue containing 5118 component sources above 5 sigma. ... Left: ATLAS DR1 image (Norris et al. 2006) of a 50 by 50 arcmin region of CDFS. ... today * ATNF | ...
... Three ATNF postdocs visiting the ATCA . by Amy Kimball (CASS) . ATNF postdocs (from left to right: Tim Shimwell, Ioannis Gonidakis, and Amy Kimball) enjoying a working visit to the Australia Telescope Compact Array (ATCA). ... Every summer a group of dedicated ATNF vacation students gets to use the ATCA for several short observing projects, supervised by ATNF experts (pictured). The photo was taken in January 2014 during a tour through the pedestal and vertex rooms of an ATCA antenna. | ...
... An HI View of Galaxy Conformity: HI-rich Environment around HI-excess Galaxies . by Jing Wang (CASS) . ... We apply the technique to the Bluedisk data and find an excess of HI mass outside the detected galaxies in the 500 kpc environment around less massive and HI-rich central galaxies (in the figure the blue shades are for low stellar mass and low HI mass fraction and the red shades are for the high stellar mass and high HI mass fraction). ... today * ATNF | ...
4th of December 2015 . Bolton Symposium talk . ... We observe cold neutral atomic hydrogen (HI) self absorption (HISA) clouds throughout our Galaxy against the background of warmer HI emission. ... The Riegel-Crutcher cloud is one of the most famous HISA regions located in front of the Galactic centre. We measure HI absorption against 56 continuum sources in the region to derive the optical depth, the temperature and HI column densities. ... today * ATNF | ...
... ASKAP Highlights - Tucana field, now 3 epochs 150 degr 2 . by Ian Heywood (CASS) and ASKAP team . The above image was made as part of BETA commissioning to test the rapid, wide area survey capabilities of the telescope. ... This observation was repeated on three different days, and the above three colour image has a one of the three epochs in each of the red, green and blue image channels. ... Fading sources would appear red in this image, and anything that was brightening would appear blue. ...
... 2014 Science Highlights . Spatially-resolved dust properties of the GRB 980425 host galaxy . Michalowski et al. (2014) present spatially resolved maps of dust emission of the host galaxy of the closest known GRB 980425 at z = 0.0085 using our new high-resolution observations from Herschel, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). ... 2014). ATNF Science Highlights from refereed publications during 2014. | ...
4th of July 2015 . Kinematic Modelling of Warped Galaxy Discs . ... In Kamphuis et al. (2015) we present an automated procedure which fits tilted-ring models to HI data cubes of individual, well-resolved galaxies, the so-called Fully Automated TiRiFiC (FAT) an IDL wrapper around TiRiFiC (Jozsa 2007). ... The picture above (click to enlarge) shows some of the measured and modelled HI velocity fields of LVHIS galaxies obtained with the Australia Telescope Compact Array (ATCA). ... today * ATNF | ...
... ASKAP beamformers arrived . by the ASKAP team (CASS) . The big wooden crates last seen at the CSIRO Astronomy and Space Science (CASS) headquarters in Sydney have safely arrived on the ASKAP site, where they were unpacked. The equipment for the first four production back-end signal processing systems was installed in the MRO Control Building last week. All the digital receivers and beamformers were installed in ASKAP antennas 2, 4, 5 and 12. | ... today * ATNF | ... ASKAP | ...
... ATNF Colloquium . Spatial RFI Mitigation Radio Astronomy . ... Current approaches for mitigating interference contributions to astronomical observations mostly consist of detecting and excising corrupted data in the time and/or frequency domains. Although this process is easy to implement, the loss of data involved can be significant. The development of sensor arrays in the last decades naturally gave rise to new trends in signal processing, including spatial RFI mitigation. ...