AndreaBozzo/ceres-open-data-index huggingface dataset:
Parkes observations for project P1196 semester 2023APRS_04

We request observing time at the Parkes telescope for observing three millisecond pulsars (MSPs): J1242-4712, J2101-4800, and J2144-5237. These MSPs were discovered with the GMRT. Spectra, profile evolution with frequency, and the radio polarisation properties of these MSPs are hitherto unexplored. Hence observations with the Parkes UWL receiver will be very valuable in that aspect. We propose radio polarisation study with the Parkes telescope over the large bandwidth of UWL receiver between 0.7 to 4 GHz, to complement our knowledge of spectra and profile evolution with the GMRT observations. Proposed main aims of this proposal are,
  (i) Investigation of profile evolution with frequency
  (ii) Investigation of polarisation angle sweep allowing to constrain the emission geometry.
  (iii) Investigation of spectra for these MSPs from 150 MHz to 4 GHz with Parkes and GMRT observations.
  (iv) Two of the MSPs, J1242-4712, J2101-4800, are spider MSP systems, in a compact orbit with a low mass companion. These systems are extreme southern sources and can be only observed for about 40% of their orbit with the GMRT. The proposed observations with the Parkes UWL will allow us to probe the orbital phase-dependent polarisation and spectral properties of these systems.
  (v) For J2144-5237, a wide pulse profile with multiple profile components is observed. We aim to investigate the steepness of the PA sweep changes as a function of observing frequency for a given profile component as reported from previous investigations.
  We request 32 hrs of observing time at the Parkes to perform this study.

Organization: CSIRO Data Access Portal
Parkes observations for project P1183 semester 2025APRS_07

After nearly two years of monitoring, comprising 126.7 hours over 57 observations with the Parkes telescope and 49.4 hours across 101 observations with the FAST telescopes, we have determined that FRB 20220529 is an extremely active repeater. It exhibits one of the longest activity durations and a potential period. Due to frequent observations scheduled with both Parkes and FAST, we recently observed an abrupt rotation measure (RM) flare in this source. This is the first detection of such an RM flare'' in a fast radio burst (FRB), suggesting that the source is in an environment with occasionally erupting coronal mass ejection. This presents a unique opportunity to study the eruption environment of FRBs and investigate the relation between burst activity and other burst parameters. If confirmed, the periodicity and theRM flare'' of FRB 20220529 would corroborate each other and become a ``smoking gun'' of the binary origin of FRB. In our previous analysis, both Parkes and FAST observations have proven essential. While FAST's higher sensitivity has enabled the capture of many bursts, Parkes' wideband receiver has provided a good burst detection rate even during low-rate phases. Notably, during the RM flare, two high signal-to-noise ratio bursts from Parkes have been crucial in understanding the RM variations. To further investigate FRB 20220529, we have scheduled regular FAST observations every fortnight, monitoring the source for 20 minutes each time. Therefore, we also propose to monitor FRB 20220529 using the Parkes UWL receiver, ensuring high-time resolution and employing full-polarization observations.

Organization: CSIRO Data Access Portal
Extreme Value Analysis of the Coupled Coastal Hazard Prediction System (CCHaPS) Hindcast for Australia

Extreme value analysis of CCHaPS, the Coupled Coastal Hazard Prediction System, which is a 2D hydrodynamic and wave model (Semi-implicit Cross-scale Hydroscience Integrated System Model and Wind Wave Model III, SCHISM-WWMIII), configured around the Australian coastline including the Great Barrier Reef, and extending out to deep offshore waters or neighbouring landmasses (https://data.csiro.au/collection/csiro:65669).
The model simulates water levels due to astronomical tides, weather, waves and aspects of wave-flow interaction over multiple decades, allowing for full consideration of the dynamics of extreme sea levels and waves in the Australian region, at high spatial resolution from ~7 km offshore down to ~250 m at the coast, and ~100 m in major river mouths. The model is run on an unstructured (triangular) grid comprising over 1.4 million nodes, which extends overland up to a 12 m elevation contour, to enable modelling of inundation events and sea level rise.
The CCHaPS hindcast covers the 40-year period 1981 to 2020.
Extreme value analysis has been performed on
1) annual maximum{yr_max} significant wave heights {hs}, and
2) detrended annual maximum {yr_max-detrended} water levels {zos}, with the linear trend in mean water levels removed.
Three types of extreme value distributions (EVDs) are fitted to the annual maxima:
- two-parameter Gumbel
- three-parameter Generalised Extreme Value (GEV)
- four-parameter mixed Gumbel distribution (https://doi.org/10.1038/s41598-022-08382-y)
Datasets are provided for
1) the commonly used GEV {fgev}, and
2) the best of the three EVD {bestEVD} types (with positive shape parameters), selected using the Akaike Information Criterion (AIC). Lower values of AIC indicate better models, in the sense that the model fit is better relative to the number of model parameters.
Note: GEV fits with a negative shape parameter (i.e. bounded upper tail) can yield lower estimated extremes and are therefore not always preferred (e.g. Haigh et al., 2014; https://doi.org/10.1007/s00382-012-1652-1). 
The dataset comprises 1, 2, 5, 10, 20, and 63% Annual Exceedance Probabilities (AEPs) with {upper} and {lower} 95% confidence intervals, stored as netCDF data on an unstructured grid, compliant with CF, ACDD and UGRID metadata conventions. Additional processing is also applied to the confidence intervals. A notebook demonstrating how to interact with the data will be attached under Supporting Documentation, and also available via GitHub (see Related Links, LINK TBA).
The netCDF files can be viewed in QGIS by importing them as a mesh through the Data Source Manager. (https://docs.qgis.org/3.40/en/docs/user_manual/working_with_mesh/mesh.html?utm_source=chatgpt.com)
The data is also stored on CSIRO infrastructure in the {ev-acs-wp3-cchaps} volume, and at NCI in /g/data/ia39/WP3/release/CCHaPS.
A manuscript describing this dataset is in preparation and will be linked to this metadata record in due course.

Organization: CSIRO Data Access Portal
XBeach to XBeach-GPU parameter conversion script

This collection contains a Python script (xb2xbg.py) to convert parameters for the XBeach littoral zone modelling software for use with XBeach-GPU, a file of unit test functions, example input parameter and dependent files and expected converted output files (see data directory). Documentation per converted parameter and output variable can optionally be generated. Verbose output provides information about the conversion process and any problems encountered along the way. The conversion process makes use of the XBeach-GPU HTML user manual and the script incorporates knowledge of the differences between XBeach and XBeach-GPU parameters and variables.

Organization: CSIRO Data Access Portal
Parkes observations for project P1185 semester 2023APRS_45

Ultra-long period neutron stars (ULPNSs) are an emerging class of objects that have sparked interest and curiosity in the fast transient community. Along with standard magnetars, they have been theorised to be potential progenitors of the enigmatic fast radio bursts (FRBs). The MeerTRAP project at the MeerKAT radio telescope is uncovering several magnetar and ultra-long period neutron star candidates, an example of which is PSR J0901-4046 with a period of 76s. Continued long-term monitoring of PSR J0901-4046 has shown it to be potentially transitioning into radio quiescence. The proposed observations will enable us to continue to monitor and characterise the decline in flux density. We have also discovered two new candidates MTP0027 and MTP0068 with periods of ~10 seconds and ~5 seconds respectively. Both sources exhibit magnetar-like pulse morphology and have only been detected in one epoch with MeerKAT. We propose to continue monitoring these sources to re-detect pulses and study their spectro-temporal-polarimetric properties.

Organization: CSIRO Data Access Portal
Global terrestrial plant nitrogen stable isotope ratio samples: 30m centroid of each 0.1 degree grid cell from 1984 to 2022

Annual global maps of foliar δ15N during 1984-2022, produced based on the method described in detail in Yang et al. (in review) . The maps could inform the improvement of nitrogen cycle models and the assessments of the impacts of environmental changes. 
The annual maps are accompanied by the standard deviation of the predictions of the 500 trees of the random forest model. There are addition analysis using Monte Carlo method to quantify the prediction uncertainty in the PredictionUncertainty folder. 

Organization: CSIRO Data Access Portal
Parkes observations for project P1171 semester 2025APRS_03

The origin of Fast Radio Bursts (FRBs) is still unclear with a plethora of theoretical models for their origin.
  Several models predict associated multi-wavelength emission, but previous searches for optical, X-ray or
  gamma-ray counterparts of FRBs have not led to any detection. The Galactic magnetar SGR 1935+2154A has
  been observed to simultaneously emit FRB-like bursts and X-ray flares, which suggests that also extragalactic
  FRB sources may exhibit X-ray counterparts. Because of the high cost of X-ray satellites and in face of the
  relatively low FRB detection probability in their small field of view, coordinated radio and X-ray observations are
  logistically very difficult to set up. We propose a new approach using the X-ray satellite XMM-Newton and the
  Parkes/Murriyang radio telescope to put constraints on the theoretical models: We aim to conduct shadowing
  observations with the Parkes telescope to search for new FRBs in fields that are simultaneously covered by
  XMM-Newton. We hereby target regular XMM observations of nearby (low-z) galaxies, to increase our
  detection chances of possibly associated X-ray emission. In case of an FRB detection in the radio band, we will
  have guaranteed simultaneous X-ray coverage and will get detailed information about the associated X-ray
  spectrum and light curve since all XMM-Newton data will become public a year after the observation.

Organization: CSIRO Data Access Portal
Parkes observations for project P1219 semester 2025APRS_04

Magnetic fields are fundamental in regulating star formation and the evolution of molecular clouds. Zeeman splitting offers a unique method to directly measure line-of-sight magnetic field strengths in interstellar environments, from the diffuse ISM to dense cores. Observations of HI and OH absorption toward pulsars provide an unprecedented opportunity to measure magnetic fields with high precision, benefiting from pulsars' small angular sizes and reliable Stokes V spectra unaffected by instrumental effects. Our recent tentative Zeeman splitting detections in OH absorption toward PSR J1644-4559 with Parkes reveal magnetic field strengths that suggest magnetically subcritical states, where magnetic pressure counteracts gravity. This challenges conventional theories of subcritical cold neutral medium (CNM) transitioning to supercritical star-forming molecular clouds, emphasizing the need for detailed investigation. We propose a continuation of Zeeman splitting studies through high-sensitivity OH and HI absorption observations of pulsars PSR J1644-4559, J1721-3532, and J1852+0031 using Parkes. By employing an innovative phase-resolved spectral technique and extending integration times, we aim to enhance Zeeman detection sensitivity and study magnetic field transitions in the CNM and quiescent molecular clouds. This work will refine our understanding of subcritical-to-supercritical transitions in star formation, establish pulsar absorption as a robust probe of interstellar magnetic fields, and advance observational techniques critical to star formation studies.

Organization: CSIRO Data Access Portal
Parkes observations for project P1211 semester 2024APRS_13

Traditional 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. 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 ASKAP surveys 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. In this proposal, we propose to observe 16 pulsar candidates identified in the Galactic plane using new ASKAP EMU images. We found 22 candidates by selecting sources with spectral index steeper than -2.0 and compactness less than 1.2. Among them 13 are known pulsars and a reasonable number of candidates to follow up (9 sources). In total, we have 16 candidates including seven sources from 2023APRS semester. 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.

Organization: CSIRO Data Access Portal
Parkes observations for project P1054 semester 2025APRS_07

With 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.

Organization: CSIRO Data Access Portal
Long-term project observations for project P1321 semester 2025APRS_05

The atomic interstellar medium shows tiny-scale optical depth fluctuations on the scale of 0.1~10,000 AU, whose origin and nature are poorly understood. The existence of this Tiny-Scale Atomic Structure (TSAS) has significant implications, potentially calling into question our fundamental understanding of heating, cooling and dynamical processes in the interstellar medium. Yet observations remain sparse. This long-term project plans to search for temporal variations in HI absorption spectra seen against background pulsars to characterise TSAS in the Milky Way interstellar medium (ISM). These observations constitute the largest number of sightlines and densest temporal sampling ever performed in a single experiment, and will test predictions that TSAS is the tail end of a turbulent cascade, constrain its minimum size scale (down to resolutions of ~0.05 AU) and potentially provide the first direct measurements of pressures in "large" TSAS features of &gt; 1000 AU. We make use of the phase-resolved spectral line mode that we have recently implemented on Parkes, which has cut data rates and processing times by factors of ~1000 compared to past studies. This is an expansion of our pilot P1321 to a long term study.

Organization: CSIRO Data Access Portal
Parkes observations for project P1325 semester 2025APRS_02

We request 15 hours of observing time with the Parkes UWL receiver (700-4000 MHz) to investigate frequency-dependent eclipsing in three spider millisecond pulsars (MSPs): one redback and two black widows. Spider MSPs commonly exhibit frequency-dependent eclipsing, which provides insights into their dense, magnetized plasma environments. We propose to use the Parkes telescope with the UWL receiver in full polar mode to investigate key properties of three spider MSPs, focusing on their eclipse mechanisms and polarization characteristics. Our goals include modeling the eclipse phase spectra using wideband observations to examine the transition from optically thick to thin regimes and exploring the underlying eclipse mechanisms. Additionally, we aim to study the polarization properties of these MSPs, which remain unexplored around 2 GHz, and also to investigate high-frequency eclipses similar to those observed in systems like J1908+2105. Such eclipses suggest the presence of dense and magnetized plasma environments, enabling more precise constraints on parameters like electron column density and magnetic field strengths. Furthermore, we plan to probe magnetic fields by observing potential changes in rotation measure (RM) at eclipse ingress and egress.

Organization: CSIRO Data Access Portal
Parkes observations for project P1328 semester 2025APRS_13

Fast radio bursts are peculiar micro-millisecond duration transients, which have been seen to be extragalactic in origin. Since their discovery, a dichotomy has emerged in their population. Some FRBs have been seen to be repeating, while others have not been seen to be repeating. The repeating FRBs, such as FRB 20180301A, provide an unparalleled window into their circumburst environment due to their repeating nature, which can be used to constrain possible progenitor models and test underlying emission mechanisms. Additionally, FRB 20180301A has been seen to have interesting polarisation properties, such as a switch in the sign of RM, indicating a reversal in the magnetic field and a marked reduction in the linear polarisation fraction towards lower frequencies (depolarisation). The previous Parkes/Murriyang source follow-up has also revealed a temporal evolution in the dispersion measure (DM) of the source and tentative evidence for correlation in the DM and rotation measure (RM). The ultra-wideband low (UWL) receiver on Parkes/Murriyang is ideally suited to explore the wideband spectro-temporal and polarimetric behaviour of the source. We propose regular monitoring of FRB 20180301A using UWL to model the magnetic field evolution, study its circumburst media using depolarisation behaviour, and constrain any correlation of DM and RM.

Organization: CSIRO Data Access Portal
Tropical Cyclone Potential Intensity (TCPI)

This data collection consists of Tropical Cyclone (TC) Potential Intensity (PI) calculated from the ERA5 reanalysis dataset (1979 to 2023) and a selection of global climate models that contribute to the sixth iteration of the Climate Model Intercomparison Project (CMIP6). PI is a theoretical upper limit for tropical cyclone intensity useful in determining changes in the most intense TCs, given sea surface temperature and profiles of atmospheric temperature and humidity. 
A number of modelled scenarios were analysed including future climate change scenarios (2015 to 2100) using the Shared Socio-economic Pathways (SSPs) as described by the IPCC Sixth Assessment report:  SSP126, SSP370 and SSP585, as well as the historical period (1950 to 2023).
This work was funded through Project 2.5 of the National Environmental Science Program's Earth System and Climate Change Hub.

Organization: CSIRO Data Access Portal
Parkes observations for project P1344 semester 2025APRS_06

Fast radio bursts (FRBs) are millisecond-duration radio bursts of extragalactic origin. Since the discovery of the first FRB in the archival Parkes/Murriyang multibeam data, a broad dichotomy in population has emerged. Some FRBs have been seen to be repeating, while others are not, despite a significant amount of follow-up using different radio telescopes. The commissioning of new dedicated FRB detection systems has led to an exponential increase in the detected FRBs over the last decade. Despite &gt;700 FRBs published to date, there is still a lack of understanding about the physical mechanisms through which FRB emission is produced. Due to the possibility of detecting multiple bursts from the same source in a repeating FRB, it forms an ideal sample set to uncover the physics of the source (e.g., emission mechanism, progenitor surrounding media), and test possible progenitor models. The coherent upgrade to the FRB detection system to ASKAP is expected to detect ~1 FRB/week. However, due to the limited fractional bandwidth available with ASKAP and survey nature of the telescope, probing the spectro-polarimetric characteristics of repeating sources is non-optimal. Hence, the large bandwidth offered by the ultra wideband-low (UWL) on Parkes/Murriyang is an ideal instrument to follow-up repeating FRB sources discovered through CRACO. We propose using the unallocated time/Green Time on UWL to follow up repeater-like sources to study their wideband spectro-polarimetric characteristics.

Organization: CSIRO Data Access Portal
Parkes observations for project P1338 semester 2025APRS_31

Fast radio bursts (FRBs) are millisecond-duration radio bursts of extragalactic origin. Since the discovery of the first FRB in the archival Parkes/Murriyang multibeam data, a broad dichotomy in population has emerged. Some FRBs have been seen to be repeating, while others are not, despite a significant amount of follow-up using different radio telescopes. The repeating FRB 20240114A was recently discovered by CHIME/FRB, which has been seen to have an exceptionally high burst activity. Such extreme burst activity has not been seen in any other source. The repeating FRBs, such as FRB 20240114A, provide an unparalleled window into their circumburst environment due to their repeating nature, which can be used to constrain possible progenitor models and test underlying emission mechanisms. The previous Parkes/Murriyang source follow-up has also revealed intriguing spectro-polarimetric properties, such as frequency-dependent evolution of burst central frequency or chromaticity, a possible activity window, significantly large circular polarisation (CP), and frequency-dependent CP. These properties hold the key towards understanding the circumburst environment of the FRBs, and test possible progenitor models. A large bandwidth instrument with reliable polarimetry has been critical in uncovering these properties. The ultra-wideband low (UWL) receiver on Parkes/Murriyang is ideally suited to explore the source's wideband spectro-temporal and polarimetric behaviour. We propose a campaign to regularly follow up FRB 20240114A to ascertain its long-term evolution of spectro-temporal properties.

Organization: CSIRO Data Access Portal