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Parkes observations for project P1375 semester 2025OCTS_03
No full textOpen clusters have historically shown a striking absence of neutron stars due to their shallow gravitational potential wells that cannot retain these compact objects after supernova explosions with large natal kicks. However, our recent archival search of Parkes observations has discovered three promising Rotating Radio Transient (RRAT) candidates, RRAT J1749-25, RRAT J1702-44, and RRAT J1237-60, in the direction of old open clusters. The dispersion measure (DM) analysis provides compelling evidence for cluster membership, with RRAT J1749-25 showing DM consistent with Theia 1661's predicted values, and RRAT J1237-60 exhibiting DM comparable to Trumpler 20's expectations. These detections are based on limited single-pulse observations with signal-to-noise ratios of ~7-8, requiring confirmation through extended observations. We propose follow-up observations using the Parkes Ultra-Wideband Low receiver with doubled integration times (2 hours per source, repeated twice) to confirm the astrophysical nature of these candidates and characterise their emission properties. Confirmation of neutron stars in open clusters would have profound implications for stellar evolution models, neutron star retention mechanisms, and our understanding of binary evolution in different stellar environments
Australian National Herbarium Images - restricted - 69246
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
Australian National Herbarium Images - restricted - 69248
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
Parkes observations for project P1183 semester 2023OCTS_16
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 P1281 semester 2023OCTS_08
No full textThe physical origins of Fast Radio Bursts (FRBs) have been highly debated in the past decade, until a bright radio burst from the Galactic magnetar was detected in 2020. The discovery of Galactic FRB has proved that at least some faint FRBs can originate from normal magnetars. Theoretically, young magnetar can give rise to wind nebula with persistent emission in radio band, while it has not been observed among the Galactic magnetars yet. So far, there are two active FRB repeaters confirmed to be associated with persistent radio sources, which are thought to be magnetar wind nebulae near the FRB progenitors. Recently, a special radio source, VT 1137-0337, was discovered in the VLA Sky Survey. All the observational facts strongly indicate its origin of magnetar wind nebula. We propose to observe this radio source with the Parkes UWL receiver to search for possible fast radio transients. If detection made, the PRS-FRB association would be strengthened deeply, and we would be able to directly uncover the nature of active repeaters
Parkes observations for project P1281 semester 2023OCTS_10
No full textThe physical origins of Fast Radio Bursts (FRBs) have been highly debated in the past decade, until a bright radio burst from the Galactic magnetar was detected in 2020. The discovery of Galactic FRB has proved that at least some faint FRBs can originate from normal magnetars. Theoretically, young magnetar can give rise to wind nebula with persistent emission in radio band, while it has not been observed among the Galactic magnetars yet. So far, there are two active FRB repeaters confirmed to be associated with persistent radio sources, which are thought to be magnetar wind nebulae near the FRB progenitors. Recently, a special radio source, VT 1137-0337, was discovered in the VLA Sky Survey. All the observational facts strongly indicate its origin of magnetar wind nebula. We propose to observe this radio source with the Parkes UWL receiver to search for possible fast radio transients. If detection made, the PRS-FRB association would be strengthened deeply, and we would be able to directly uncover the nature of active repeaters
Parkes observations for project P1281 semester 2023OCTS_22
No full textThe physical origins of Fast Radio Bursts (FRBs) have been highly debated in the past decade, until a bright radio burst from the Galactic magnetar was detected in 2020. The discovery of Galactic FRB has proved that at least some faint FRBs can originate from normal magnetars. Theoretically, young magnetar can give rise to wind nebula with persistent emission in radio band, while it has not been observed among the Galactic magnetars yet. So far, there are two active FRB repeaters confirmed to be associated with persistent radio sources, which are thought to be magnetar wind nebulae near the FRB progenitors. Recently, a special radio source, VT 1137-0337, was discovered in the VLA Sky Survey. All the observational facts strongly indicate its origin of magnetar wind nebula. We propose to observe this radio source with the Parkes UWL receiver to search for possible fast radio transients. If detection made, the PRS-FRB association would be strengthened deeply, and we would be able to directly uncover the nature of active repeaters
Annual vegetation height for Australia for 2019 to 2024
No full textThis product provides an annual estimate of vegetation height (top of canopy) for 2019 to 2024 at a 30m pixel size. These images are created using an extreme gradient boosting regressor (XGBoost) machine learning model which was training using GEDI vegetation height (from the 98th percentile height) with spatially complete earth observation data as independent variables: Landsat annual surface reflectance, Landsat annual fractional cover percentiles, PALSAR backscatter (HV polarised) annual mosaic, along with a Digital Elevation Model (DEM) as well as long-term average temperature and rainfall. Further details are provided in (Ticehurst et al. (in review)). This product was created as part of the National Bushfire Intelligence Capability (NBIC) and supported by the Terrestrial Ecosystem Research Network (TERN). \n\nTicehurst C, Joshi R, Hussain S, Walker S, Opie K, Donohue R (in review) Developing a nation-wide vegetation height layer for bushfire fuel classification. Submitted to ISPRS Journal of Photogrammetry and Remote Sensing.\nLineage: GEDI data are available on NASA’s Earth Data search website (https://search.earthdata.nasa.gov/). All available GEDI L2A data for Australia from 2019 to 2023 were downloaded and cleaned using the standard quality parameters. These cleaned data were used to train the model. The Landsat annual surface reflectance and fractional cover percentiles are generated through Digital Earth Australia (DEA; https://www.ga.gov.au/dea/home). These data have been indexed in the DEA datacube and are available in the CSIRO EASI platform (https://research.csiro.au/easi/). The annual PALSAR backscatter mosaics are provided by the Japanese Aerospace Exploration Agency (https://www.eorc.jaxa.jp/ALOS/en/dataset/fnf_e.htm). The DEM was derived from the Shuttle Radar Topography Mission (SRTM) data (DEM-H) and is also available in the CSIRO EASI platform. The long-term average rainfall and temperature data were available from the Bureau of Meteorology. A permanent water mask, which was applied to the annual vegetation height mosaics, was available from https://glad.umd.edu/dataset/gedi/. The vegetation height product was generated using Jupyter notebooks on the CSIRO EASI platform. \nFurther details about product lineage are provided in the product description pdf file (AnnualVegetationHeight_ProductDescription.pdf) located under Supporting Files.\n\
Long-term project observations for project P1101 semester 2025APRS_10
No full textWe propose a long-term project to monitor a very active repeater, FRB 20190520B, with Murriyang's UWL system. Our previous observations show that FRB 20190520B is not only among the most active FRBs that can be observed with Murriyang, but also shows extreme rotation measure (RM) and dispersion measure (DM) evolution, along with distinctive behavior at 3GHz frequency. This makes the UWL receiver uniquely suited for detailed studies and long-term monitoring of this repeating FRB. Through this program, we anticipate detecting a large sample of bursts from this FRB. In collaboration with FAST, we aim to investigate the time evolution of various properties of FRB 20190520B, enhance our understanding of polarisation across an extremely wide bandwidth with high sensitivity, and gain deeper insights into the local environment and emission mechanisms of FRBs
Australian National Herbarium Images - 67487
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