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Parkes observations for project P1211 semester 2023OCTS_05
No full textTraditional pulsar searching techniques are not sensitive enough to extreme pulsars such as millisecond pulsars (MSPs) in compact binaries (e.g., Pulsar-Blackhole binary systems), extremely fast spinning pulsars (e.g., sub-MSPs), and high dispersion measure (DM) pulsars (e.g., pulsars in Galactic Centre and Galactic Plane). Such a situation is now changed thanks to the development of next generation radio telescope arrays such as Australian Square Kilometer Array Pathfinder (ASKAP). ASKAP is capable of conducting highly sensitive radio continuum surveys with wide sky coverage (e.g, Evolutionary Map of The Universe survey). One of the solutions is to find pulsar candidates in radio continuum surveys such as EMU and then carry out targeted searches. This technique allows us to search over the wide bandwidth with full field of view while avoiding the need for expensive pixel-by-pixel high time resolution searches. \n \n In this proposal, we propose to observe 16 MSP candidates identified in the Galactic plane using new ASKAP EMU images. We found 23 candidates by selecting sources with spectral index steeper than -1.90 and compactness less than 1.2. Among them 7 are known pulsars giving us high fraction of pulsars (~33%) and a reasonable number of candidates to follow up (16 sources). Because of the dense ionised medium in the Galactic Plane, MSPs are likely to be missed by previous pulsar surveys carried out at 1.4 GHz. Here, we propose a targeted pulsar search with the Parkes UWL which allow us to search pulsation at higher frequencies and therefore avoid strong DM smearing and scattering effects
Parkes observations for project P1219 semester 2023OCTS_16
No full textThe magnetic field potentially regulates the process of star formation and the evolution of molecular clouds. It is inherently difficult to measure interstellar magnetic field strengths, with the measurement of Zeeman splitting a unique method to estimate the magnetic field strength along the line of sight directly. Despite the detection of Zeeman splitting in other mediums, there are as yet no Zeeman detections against compact background sources in quiescent molecular clouds or the cold neutral medium. Pulsars with extremely small solid angles and relatively high transverse velocities are ideal background sources to study the magnetic field in molecular clouds, providing a distinct signal to measure splitting against. There are four pulsars with OH absorption detections, namely PSR B1849+00, B1641-45, B1718-35, and B1749-28. We propose to utilize these four pulsars to explore the properties of the magnetic field and its variations within molecular clouds through both the Zeeman splitting of OH absorption and rotation measure estimations, between epochs. If a detection is confirmed, it will open a new window on the hard-to-measure magnetic fields in molecular clouds, independent of interpretation, thus shedding light on the physics of star formation and the interstellar medium
Parkes observations for project P1229 semester 2023OCTS_11
No full textWe propose a pulsar timing campaign of three millisecond pulsars discovered in previous pulsar searches of Fermi gamma-ray sources. Despite an original follow-up effort, it was not possible to produce a pulsar timing solution with which to detect the expected gamma-ray pulsations. The proposed campaign combines a set of dense, initial observations with additional observations at increasing separation, a bootstrap approach which is generally successful at constraining all the fundamental parameters of the pulsar timing solution. Securing the gamma-ray pulsations will enable probes of the radio and gamma-ray emission mechanisms and searches for multi-wavelength counterparts. And perhaps more importantly, it will allow these pulsars to be incorporated into the gamma-ray pulsar timing array, providing additional baselines which will increase its sensitivity to low-frequency gravitational waves
Parkes observations for project P1054 semester 2025APRS_20
No full textWith this proposal we ask time to continue our timing follow-up campaign of pulsars discovered with the MeerKAT telescope. Fourtytwo sources have been discovered in targeted observations of Fermi unidentified point sources, two towards Supernova Remnants, 19 in the Magellanic Clouds, 105 in Globular Clusters and 81 in a survey of the Galactic plane. A large fraction of the new discoveries are recycled pulsars (including a few relativistic systems and several 'spider' binaries), or young pulsars. Timing observations have an essential role in exploiting the full potential of any pulsar discovery, allowing for the precise measurement of rotational, astrometric and orbital parameters which, in turn, give us powerful tools to improve our understanding of the physics in extreme environments as well as of the population of neutron stars as a whole. The UWL receiver of the Parkes telescope is a sensitive, versatile instrument that is allowing us to successfully time these new sources, in the bright-end of TRAPUM discoveries
Australian National Herbarium Images - 67581
No full textThis collection is a set of images of specimens held at the Australian National Herbarium.\n\nThe Australian National Herbarium, with approximately 1 million preserved plant specimens, is one of the three largest plant collections in Australia. It is unique among the Australian Herbaria in having a national focus for its collections, acquisition and research programs.\n\nThe Australian National Herbarium arose from the amalgamation over the years of several herbaria managed by the Commonwealth Government. These included several CSIRO herbaria, the Forest Research Institute Eucalypt Collection, the Forest Research Institute's Atherton Rainforest Collection, and the Australian National Botanic Gardens Herbarium. The CSIRO's core collection, previously known as 'Herbarium Australiense', was renamed 'Australian National Herbarium' in 1984. The Australian National Herbarium is a program of the Centre for Australian National Biodiversity Research and a contributor to Australia's Virtual Herbarium.\n\nSpecimens within the main collection have been collected and managed as a joint venture with the Australian Government's Department of Climate Change, Energy, the Environment and Water. Specimens from the Australian Tropical Herbarium have been collected and managed as a joint venture with James Cook University and the Queensland Government.\n\nThe curation, databasing and digitisation of the ANH Orchidaceae floral dissection card collection was supported by funding from the Australian Orchid Foundation.\nLineage: This dataset is one of a series holding images from the Australian National Herbarium collection. These images were taken as part of a systematic project digitising the whole Herbarium collection or ongoing imaging of the physical specimen collection, and this grouping of images is arbitrary based on the time period the images were taken, it is not a comprehensive list of all the specimens available in a taxon.\n\nAs such, this dataset may not include all images from a particular taxon and we recommend the NRCA specimen image search under Scientific Domains which can be used to search across the image datasets to find all images from a specific taxon
Australian National Herbarium Images - 66659
No full textThis collection is a set of images of specimens held at the Australian National Herbarium.\n\nThe Australian National Herbarium, with approximately 1 million preserved plant specimens, is one of the three largest plant collections in Australia. It is unique among the Australian Herbaria in having a national focus for its collections, acquisition and research programs.\n\nThe Australian National Herbarium arose from the amalgamation over the years of several herbaria managed by the Commonwealth Government. These included several CSIRO herbaria, the Forest Research Institute Eucalypt Collection, the Forest Research Institute's Atherton Rainforest Collection, and the Australian National Botanic Gardens Herbarium. The CSIRO's core collection, previously known as 'Herbarium Australiense', was renamed 'Australian National Herbarium' in 1984. The Australian National Herbarium is a program of the Centre for Australian National Biodiversity Research and a contributor to Australia's Virtual Herbarium.\n\nSpecimens within the main collection have been collected and managed as a joint venture with the Australian Government's Department of Climate Change, Energy, the Environment and Water. Specimens from the Australian Tropical Herbarium have been collected and managed as a joint venture with James Cook University and the Queensland Government.\n\nThe curation, databasing and digitisation of the ANH Orchidaceae floral dissection card collection was supported by funding from the Australian Orchid Foundation.\nLineage: This dataset is one of a series holding images from the Australian National Herbarium collection. These images were taken as part of a systematic project digitising the whole Herbarium collection or ongoing imaging of the physical specimen collection, and this grouping of images is arbitrary based on the time period the images were taken, it is not a comprehensive list of all the specimens available in a taxon.\n\nAs such, this dataset may not include all images from a particular taxon and we recommend the NRCA specimen image search under Scientific Domains which can be used to search across the image datasets to find all images from a specific taxon
Parkes observations for project P1183 semester 2023OCTS_15
No full textWe have detected a total of 48 bursts of FRB 20220529 using the Parkes UWL receiver, with 29 of them detected during full polarization observations. Our previous cooperating observations of FAST and Parkes for FRB 20220529 have revealed significant variations in flux distribution during different active periods. However, only 3 bursts from Parkes have been observed simultaneously with FAST, one of which has the potential to improve the spectrum limits of repeating FRBs by more than an order of magnitude. To further investigate FRB 20220529, we have scheduled regular FAST observations every fortnight, tracking the source for 20 minutes each time. Additionally, we have been granted another 10 hours of FAST time to facilitate simultaneous observations of FRB 20200529 using both the FAST and Parkes telescopes. Therefore, we propose to continue monitoring the source of FRB 20220529 using the Parkes UWL receiver, ensuring high-time resolution and employing full-polarization observations to: (1) detect more bursts using the Parkes UWL receiver, with corresponding simultaneous observations from FAST, in order to obtain robust constraints on the radiation spectrum of repeating FRBs; (2) explore additional clues regarding the active periods of FRB 20220529; (3) study the microstructure of the bursts
Parkes observations for project P1219 semester 2023OCTS_20
No full textThe magnetic field potentially regulates the process of star formation and the evolution of molecular clouds. It is inherently difficult to measure interstellar magnetic field strengths, with the measurement of Zeeman splitting a unique method to estimate the magnetic field strength along the line of sight directly. Despite the detection of Zeeman splitting in other mediums, there are as yet no Zeeman detections against compact background sources in quiescent molecular clouds or the cold neutral medium. Pulsars with extremely small solid angles and relatively high transverse velocities are ideal background sources to study the magnetic field in molecular clouds, providing a distinct signal to measure splitting against. There are four pulsars with OH absorption detections, namely PSR B1849+00, B1641-45, B1718-35, and B1749-28. We propose to utilize these four pulsars to explore the properties of the magnetic field and its variations within molecular clouds through both the Zeeman splitting of OH absorption and rotation measure estimations, between epochs. If a detection is confirmed, it will open a new window on the hard-to-measure magnetic fields in molecular clouds, independent of interpretation, thus shedding light on the physics of star formation and the interstellar medium
Australian National Herbarium Images - restricted - 66569
No full textThe Australian National Herbarium, with approximately 1 million preserved plant specimens, is one of the three largest plant collections in Australia. It is unique among the Australian Herbaria in having a national focus for its collections, acquisition and research programs.\n\nThe Australian National Herbarium arose from the amalgamation over the years of several herbaria managed by the Commonwealth Government. These included several CSIRO herbaria, the Forest Research Institute Eucalypt Collection, the Forest Research Institute's Atherton Rainforest Collection, and the Australian National Botanic Gardens Herbarium. The CSIRO's core collection, previously known as 'Herbarium Australiense', was renamed 'Australian National Herbarium' in 1984. The Australian National Herbarium is a program of the Centre for Australian National Biodiversity Research and a contributor to Australia's Virtual Herbarium.\n\nSpecimens within the main collection have been collected and managed as a joint venture with the Australian Government's Department of Climate Change, Energy, the Environment and Water. Specimens from the Australian Tropical Herbarium have been collected and managed as a joint venture with James Cook University and the Queensland Government.\n\nThis collection of specimen images is restricted due to one of more of the following reasons:\n\n-- rare or threatened status; \n\n-- biosecurity implications;\n\n-- cultural sensitivity;\n\n-- specimen donation stipulations.\n\nIndividuals or organisations with a legitimate research use of these images can request access to the images.\n\nThe curation, databasing and digitisation of the ANH Orchidaceae floral dissection card collection was supported by funding from the Australian Orchid Foundation.\nLineage: This dataset is one of a series holding images from the Australian National Herbarium collection. These images were taken as part of a systematic project digitising the whole Herbarium collection or ongoing imaging of the physical specimen collection, and this grouping of images is arbitrary based on the time period the images were taken, it is not a comprehensive list of all the specimens available in a taxon.\n\nAs such, this dataset may not include all images from a particular taxon and we recommend the NRCA specimen image search under Scientific Domains which can be used to search across the image datasets to find all images from a specific taxon