Showing results for: [ Australia Square Kilometre Array Pathfinder ]
We will carry out high spectral resolution observations of the Large Magellanic Cloud with at least 12 antennas of the Australian SKA Pathfinder (ASKAP) telescope. This will be prefaced by a small pil... moreot program (possibly starting with a smaller bandwidth) to prepare software and techniques. The data collected will primarily serve the GASKAP survey team but data products will be released into the CSIRO ASKAP Science Data Archive (CASDA) for general use.
Australia Square Kilometre Array Pathfinder - AS037 - ASKAP Early Science at High Spectral Resolution - Published 04 Nov 2019
This collection contains a spectral image cube of the LGG 351 group. The image cube consists of 23 ASKAP beams and 7 MHz of bandwidth (1396.57 to 1403.56 MHz, with a resolution of 18.5 kHz). The sky c... moreoverage is 13:24:00 < RA < 13:38:00 and -26:30:00 < DEC < -33:30:00. This spectral image cube is presented in For et al. 2019, MNRAS DOI: 10.1093/mnras/stz2501less
Australia Square Kilometre Array Pathfinder - AS035 - ASKAP Early Science Widefield HI Survey - Published 01 Nov 2019
This survey is designed to test and develop ASKAP’s capability to rapidly follow up on gravitational wave detections. When observatories such as LIGO issue event notifications, they will be assessed f... moreor the likelihood of a radio counterpart and a target of opportunity event triggered if the chance of detection is high (e.g. in the case of a double neutron star merger). Gravitational wave events often have a large angular uncertainty in their direction of origin, so ASKAP’s wide field of view makes it extremely effective at following up these events. Data processing strategies are similar to those of the VAST survey.less
Australia Square Kilometre Array Pathfinder - AS111 - ASKAP Pilot Survey for Gravitational Wave Counterparts - Published 19 Aug 2019
These observations will form part of the ASKAP pilot survey program. This is a joint exercise between CASS and the ASKAP Survey Science Teams to conduct a series of observations to learn how to conduc... moret large-scale surveys using the full capabilities of this new telescope. The key goal of the pilot survey program is to establish readiness for full survey operations, including determining and testing observing and processing strategies, and data validation and release. The observations collected here are primarily for EMU.less
Australia Square Kilometre Array Pathfinder - AS101 - ASKAP Pilot Survey for EMU - Published 09 Aug 2019
A mosaicked spectral image cube of IC 5201 and its satellites. The cube is comprised of 4 ASKAP beams, consisting of 650 channels that span 12 MHz (1408.5 - 1420.5) of bandwidth, with a resolution of ... more18.5 kHz. The cube is ~ 2.2 x 2.2 deg, with IC 5021 located near the centre. This spectral image cube is presented in Kleiner et al. (2019), with a detailed description of the data processing in Section 5.less
Australia Square Kilometre Array Pathfinder - AS035 - ASKAP Early Science Widefield HI Survey - Published 05 Jul 2019
These data are a combined mosaic of two overlapping ASKAP tiles covering the GAMA-23 field.
The following is copied from the validation notes of the source SBIDs and also apply to these data.
These ... moredata represent a test observation with the full ASKAP array. While it may be useful for science purposes the primary goal of the release is to seek feedback on data quality from the science community. Although the image approaches expected noise levels in most areas, a common feature of early ASKAP data has been some low-level artefacts (at ~1%) very close to bright sources (a few hundred mJy and above). These artefacts generally appear as radial stripes and rapidly fade away from the source. The origin of these artefacts is yet to be determined, but they do not seem to emulate any known instrumental effect taken into account in commonly used wideband/widefield calibration and imaging software packages (such as ASKAPsoft, casa etc.). The spectral indices given in the catalogues were derived from Taylor-term imaging, which is a technique not yet widely used in radio astronomy. It has been identified that the distribution of the spectral indices in these catalogues deviates significantly from expectations for reasons that are not yet understood. Fitting spectra to sources in the continuum cubes is recommended to attain more reliable spectral indices. While the commissioning team investigates the cause of these issues in detail, we do not wish to hold the release of otherwise good quality data. Hence these test observations are being released, but with the validation flag set to “uncertain” — meaning user discretion is necessary in the interpretation for science purposes. Users should perform their own analysis of the flux scale, source positions and spectral indices given. The ASKAP operations team would be glad to receive feedback on any issues discovered.less
Australia Square Kilometre Array Pathfinder - AS034 - ASKAP Early Science Broadband Survey - Published 19 Jun 2019
This collection contains a spectral image cube of the NGC 7232 group. The image cube consists of 12 ASKAP beams and 10.4 MHz of bandwidth spanning 1404.76 MHz to 1415.19 MHz (564 channels with a resol... moreution of 18.5 kHz). The sky coverage is 22:07:03.7 < RA < 22:22:56.3, -44:40:02.3 < DEC < -47:13:48.7. This spectral image cube is presented in Lee-Waddell et al. 2018 MNRAS XXX, XXX, with data processing detailed in Section 3.less
Australia Square Kilometre Array Pathfinder - AS035 - ASKAP Early Science Widefield HI Survey - Published 15 Nov 2018
This collection contains a spectral image cube of the NGC7162 group. The image cube consists of 6 ASKAP beams, and 8 MHz of bandwidth centred on 1409.56 MHz (432 channels with a resolution of 18.5 kHz... more). The sky coverage is 21:55:30 < RA < 22:06:00, -42:00:00 < DEC < -44:25:00. This spectral image cube is presented in Reynolds et al. 2018 MNRAS XXX, XXX, with data processing detailed in Section 2.1.less
Australia Square Kilometre Array Pathfinder - AS035 - ASKAP Early Science Widefield HI Survey - Published 04 Oct 2018
We propose to carry out a wideband (approximately 700 -1800 MHz) early science survey in full polarisation mode with at least 12 antennas of the Australian SKA Pathfinder (ASKAP) telescope. We will be... moregin with a small pilot program (starting with a smaller number of telescopes and possibly a smaller bandwidth) in order to test and prepare software required to carry out the full survey. These data will serve the EMU, POSSUM, FLASH and VAST survey teams.less
Australia Square Kilometre Array Pathfinder - AS034 - ASKAP Early Science Broadband Survey - Published 27 Sep 2018
We will carry out an HI early science survey of several regions of the sky with at least 12 antennas of the Australian SKA Pathfinder (ASKAP) telescope. We will begin with a small pilot program (possi... morebly starting with a smaller bandwidth) in order to test and prepare software required to carry out the full survey. The data collected will primarily serve the WALLABY, FLASH and VAST survey teams.
Australia Square Kilometre Array Pathfinder - AS035 - ASKAP Early Science Widefield HI Survey - Published 08 Jul 2017
This proposal is for ASKAP science commissioning observations taken with Mk II feeds together ASKAP antennas.
Australia Square Kilometre Array Pathfinder - AS033 - ASKAP Science Commissioning - Published 20 Oct 2016
ATLAS is a project to image seven square degrees of sky, in two fields (CDF-S and ELAIS-S1), at radio wavelengths, to an rms of about 15 µJy, making it the widest deep radio survey aver attempted. The... more fields are chosen to cover the Spitzer Wide-Area IR Extragalactic Survey (SWIRE), and the radio images cut through the dust, to trace the cosmic history of AGN and star-forming galaxies.
Data release 1 contains two catalogues from the deep ATLAS radio observations of the CDFS-SWIRE field:
1) radio components; and
2) radio sources with their identifications and classifications
Australia Square Kilometre Array Pathfinder - C1967 - The ATLAS 1.4 GHz survey - Published 24 Mar 2016
The Boolardy Engineering Test Array (BETA; Hotan et al. 2014) is a six-antenna prototype of the Australian SKA Pathnder (ASKAP) telescope. The ASKAP Commissioning and Early Science team will use BETA ... morefor a limited number of science observations that will exploit the unique wide-eld capabilities of BETA between 700 and 1800 MHz.less
Australia Square Kilometre Array Pathfinder - AS031 - BETA Science Observations - Published 02 Nov 2015