AndreaBozzo/ceres-open-data-index huggingface dataset:
Parkes observations for project P1054 semester 2025APRS_05

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
Parkes observations for project P1338 semester 2025APRS_18

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
Parkes observations for project P1363 semester 2025APRS_04

We propose to monitor the bursts from the hyperactive repeating fast radio burst FRB 20240619D over six months using the Murriyang UWL receiver. The primary aim is to study the evolution of burst activity and polarization properties with frequency and time, and to discover any potential periodicity in the burst activity. These insights will enhance our understanding of the progenitor, emission physics, and the immediate magneto-ionic environment of FRB 20240619D, thereby informing the general FRB population. A total of 15 hours of observing between August and November 2024 resulted in over 1300 bursts detected using the UWL receiver. Some bursts exhibit complex spectro-temporal emission patterns. The burst rate, based on Murriyang and MeerKAT observations, indicates that the source was active until September 2nd, after which it became inactive. Given that two other repeating FRBs have exhibited periodic activity cycles, it is reasonable to expect that FRB 20240619D could become active again, making continued monitoring crucial. The UWL receiver's broad frequency coverage and sensitivity are essential for detecting many bursts and enabling simultaneous observations at different frequencies. This is important for understanding the burst activity evolution with time and frequency, spectral properties, and underlying emission mechanisms. The combination of sensitivity and wide bandwidth makes Murriyang the ideal telescope for monitoring this FRB. Results from these observations will be pivotal in understanding FRB 20240619D's place within the broader repeater population and its potential connection to broader FRB progenitor models.

Organization: CSIRO Data Access Portal
Mercury concentrations in Antarctic krill from South Georgia, South Orkney Islands, and West Antarctica Peninsula (2013-2019)

This data set presents total mercury (Hg) concentrations measured from Antarctic krill (Euphausia superba) sampled between December 2013 and September 2019 from South Georgia, the South Orkney Islands, and the West Antarctic Peninsula. The data were produced to support a more thorough understanding of how Hg concentration varies in krill and how that might affect the krill-reliant Antarctic food web, especially in the context of a changing climate. Long-term data sets are needed for these purposes but are missing from Southern Ocean environments, given the difficulty and costs of accessing these remote regions. To fulfill this gap, we collaborated with AkerBiomarine, a Norwegian krill fishing and biotech company, to obtain a unique and almost contiguous data set, with fortnightly samples for most months (except October and November) throughout the collection period. We aimed to establish a baseline against which past and future studies could be compared for Hg concentrations in Antarctic krill, and to investigate any potential influence of biological (krill size, sex, and life stage) and abiotic (geographic location and temporal variation) variables in these concentrations.

Organization: CSIRO Data Access Portal
Parkes observations for project P1338 semester 2025APRS_19

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
Parkes observations for project P1325 semester 2025APRS_01

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 P1364 semester 2025APRS_02

The propagation effects of the ionized interstellar medium (IISM) on pulsars are not well understood, and increase uncertainty on pulsar timing measurements. As high-precision pulsar timing is critical for using pulsars to detect phenomena as varied as gravitational waves and neutron star glitches, it is important to improve our understanding of these propagation effects. One such effect is chromatic dispersion, which contributes to timing noise but has been detected only once. We propose a set of 4 pointings with the Murriyang 64m Parkes Radio Telescope Ultra-Wide bandwidth Low frequency receiver (UWL), totaling 10 hours of telescope time. Our three targets are all strongly polarized pulsars in the Galactic plane, selected to maximize our chances of detecting one or both of the two types of chromatic dispersion. Non-detections will place upper limits on magnetic field strength and electron density in the IISM.

Organization: CSIRO Data Access Portal
Parkes observations for project P1183 semester 2025APRS_06

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
Long-term project observations for project P1101 semester 2025APRS_02

We 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.

Organization: CSIRO Data Access Portal
Parkes observations for project P1356 semester 2025APRS_06

Magnetars are neutron stars with exceptionally high magnetic fields. From the 30 known magnetars, only six have had radio emission detected so far. The remaining 24 magnetars are generally only searched for radio emission after an X-ray outburst. This added a strong selection bias to whether magnetars are radio loud or not. From the known six radio loud magnetars, we know that the radio emission changes quickly with time and for the magnetar XTE J1810-197, it has been observed that the radio flux increases strongly without an enhancement in X-ray flux. Thus, it remains unclear whether the radio quiet magnetars are in fact radio quiet and the radio X-ray relation appears to be rather complex.
  In this proposal, we propose a regular monitoring campaign of 4 radio quiet magnetars with bi-weekly observations using the Parkes UWL receiver. For 3 of the sources, we will have accompanying X-ray observations and thus, this will give an unique data set to probe the relation between radio and X-ray independent outbursts. Any detection of radio emission, i.e. single pulses or folded profiles, would be a major discovery and help to constrain the emission mechanisms of magnetars. This will also help to improve the understanding of the emission mechanism of fast radio bursts. However, also a non-detection of radio emission will provide upper limits that serve as a baseline before any future outburst of the observed magnetars as well as allow to constrain the formation process of magnetars in contrast to pulsars.

Organization: CSIRO Data Access Portal
Parkes observations for project P1345 semester 2025APRS_06

This proposal aims to constrain burst rates and spin down properties of a sample of new Rotating Radio Transients (RRATs) discovered with the ASKAP CRAFT Coherent upgrade (CRACO) system. Over the past 12-months of commissioning, CRACO discovered and precisely localised 15 new RRATs, characterised by their sporadic pulses with dispersion measures (DM) consistent with Galactic sources. We request 22.5h of Parkes time split into three 30min observations spanning 6-months for each target. This can help constrain periods and potentially phase-coherent timing solutions given that we already have arcsec-precision interferometric localisations. Our main science goals are: 1) to measure their burst rates, periods, and spin-down properties; 2) to assess their nulling fraction and intermittency; 3) to measure their polarimetric properties and constrain their emission mechanism; 4) to determine if the CRACO RRATs are fundamentally different from the known RRAT population. Some of these goals can be answered even with the detection of a limited number of pulses.

Organization: CSIRO Data Access Portal
Parkes observations for project P595 semester 2025APRS_05

We propose to continue the PULSE@Parkes project in which high school students from Australia and around the World use the Parkes radio telescope in a remote observing model to observe and analyse pulsar data. The data from some PULSE@Parkes observations are used to support the space missions, other observations supplement the P456 Pulsar Timing Array project and the remainder were chosen in order to make a detailed analysis of pulsar timing irregularities and intermittency.

Organization: CSIRO Data Access Portal
Parkes observations for project PX600 semester 2020APRS_118

The Galactic Center (GC) is a key target for the radio component of Breakthrough Listen (BL) program. Offering the largest amount of stars in any given direction in the sky, the GC is widely cited as a location believed to harbour advanced civilizations, and it is also the most energetic region in the Milky Way. We aim to conduct BL-GC Survey with Parkes radio telescope for around 350 hours. We will cover the frequency range from 700 MHz to 4 GHz, utilizing the newly installed ultra-wideband receiver. Our team has already leveraged both standard and bespoke tools to construct a flexible software stack to search data for signals of interest. We will look for signals from extraterrestrial intelligence (ETI) by searching for both simple narrow-band signals and complex modulated signals. Along with that, as an ancillary science, we will also search for accelerated pulsars — likely orbiting a supermassive black hole at the centre of the Milky Way Galaxy. Data products produced during this program will also be publically available to engage larger pulsar community

Organization: CSIRO Data Access Portal
Long-term project observations for project P574 semester 2025APRS_02

We request time to observe 270 pulsars on a regular basis in order to achieve three main science goals. The first is to understand pulsars: how do they spin down and what disrupts this process, how and why their profiles vary with time, whether they precess or have planetary mass companions, in short all the things that make pulsar timing noisier than the perfect clock. Secondly we want to understand the interstellar medium of our Galaxy through repeated monitoring of dispersion measure, rotation measure and flux density variations in conjunction with scintillation parameters. Finally, we provide these data as a community service both to the high-energy community where we have strong collaborative links (particularly to Fermi) and to the radio pulsar astronomers generally through the CSIRO archive. The project is on-going since 2007, we are (co-)authors on 106 papers arising from the P574 data. The data have contributed to the PhD theses of students from Bordeaux, Manchester, Oxford, Stanford, and Swinburne. We are seeking long-term project status with a view to continuing the project into the SKA era.

Organization: CSIRO Data Access Portal
Parkes observations for project PX500 semester 2025APRS_12

This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries.  As the observing time has been purchased this proposal (and the related PX501) does not require TAC grading.  The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first, relating to this proposal, will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period.  The second type of time will be scheduled in shorter blocks and the data archived with a 10 year embargo.

Organization: CSIRO Data Access Portal
Parkes observations for project P1345 semester 2025APRS_05

This proposal aims to constrain burst rates and spin down properties of a sample of new Rotating Radio Transients (RRATs) discovered with the ASKAP CRAFT Coherent upgrade (CRACO) system. Over the past 12-months of commissioning, CRACO discovered and precisely localised 15 new RRATs, characterised by their sporadic pulses with dispersion measures (DM) consistent with Galactic sources. We request 22.5h of Parkes time split into three 30min observations spanning 6-months for each target. This can help constrain periods and potentially phase-coherent timing solutions given that we already have arcsec-precision interferometric localisations. Our main science goals are: 1) to measure their burst rates, periods, and spin-down properties; 2) to assess their nulling fraction and intermittency; 3) to measure their polarimetric properties and constrain their emission mechanism; 4) to determine if the CRACO RRATs are fundamentally different from the known RRAT population. Some of these goals can be answered even with the detection of a limited number of pulses.

Organization: CSIRO Data Access Portal
Parkes observations for project P1345 semester 2025APRS_07

This proposal aims to constrain burst rates and spin down properties of a sample of new Rotating Radio Transients (RRATs) discovered with the ASKAP CRAFT Coherent upgrade (CRACO) system. Over the past 12-months of commissioning, CRACO discovered and precisely localised 15 new RRATs, characterised by their sporadic pulses with dispersion measures (DM) consistent with Galactic sources. We request 22.5h of Parkes time split into three 30min observations spanning 6-months for each target. This can help constrain periods and potentially phase-coherent timing solutions given that we already have arcsec-precision interferometric localisations. Our main science goals are: 1) to measure their burst rates, periods, and spin-down properties; 2) to assess their nulling fraction and intermittency; 3) to measure their polarimetric properties and constrain their emission mechanism; 4) to determine if the CRACO RRATs are fundamentally different from the known RRAT population. Some of these goals can be answered even with the detection of a limited number of pulses.

Organization: CSIRO Data Access Portal
Long-term project observations for project P456 semester 2025APRS_02

The Parkes Pulsar Timing Array (PPTA) project has three primary goals: (a) detection of gravitational waves from astronomical sources, (b) establishment of a pulsar timescale, and (c) improvement of our understanding of Solar-system dynamics. We are now in an exciting regime where a signal detected in our (and other data sets) has the form expected for a gravitational wave background. We, along with the international community, are now working hard to either confirm or deny this result, and to determine the astrophysical origin of this signal. With this proposal, we aim to maintain our pre-eminent position in the field. This is a continuing proposal for which observations of millisecond pulsars (MSPs) will continue to improve bounds on ultra-low-frequency gravitational waves until they are detected with confidence. Continued Parkes observations will remain valuable at least until the first stage of the SKA is able to improve on our sensitivity and observing cadence. Even after the gravitational wave background is detected, continued observations will resolve the background origin and individual sources will be identified; advancing the nascent field of gravitational wave astronomy.

Organization: CSIRO Data Access Portal
Parkes observations for project PX500 semester 2025APRS_13

This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries.  As the observing time has been purchased this proposal (and the related PX501) does not require TAC grading.  The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first, relating to this proposal, will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period.  The second type of time will be scheduled in shorter blocks and the data archived with a 10 year embargo.

Organization: CSIRO Data Access Portal