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DSP Session: 4th June 2025 9:00-10:30

LocationSorted ascending Time
Beijing, China Wed, 4 Jun 2025 at 21:00 CST
Bristol, United Kingdom Wed, 4 Jun 2025 at 14:00 BST
Catania, Italy Wed, 4 Jun 2025 at 15:00 CEST
Paris, France Wed, 4 Jun 2025 at 15:00 CEST
Perth, Australia Wed, 4 Jun 2025 at 21:00 AWST
UTC, Time Zone Wed, 4 Jun 2025 at 13:00
Victoria, Canada Wed, 4 Jun 2025 at 06:00 PDT
Washington DC, USA Wed, 4 Jun 2025 at 09:00 EDT

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Wednesday June 4 @09:00 CEST: Room
Speaker Title Time Abstract Material

Dave Morris

(Remote)

 		Execution Broker Update

15'

9:00-9:15

 		The IVOA Execution Broker Working Draft represents a key step toward standardising how astronomical workflows and computational tasks are managed and executed across distributed infrastructures. This talk will provide an update on the current status of the draft specification, outlining its core concepts and goals. It will also highlight ongoing prototype implementations being developed within the context of the SRCNet (Square Kilometre Array Regional Centres Network), demonstrating practical applications and informing the evolution of the standard. The session will offer insights into lessons learned, emerging challenges, and next steps toward community adoption.  

ZHANG, Zhen

(Remote)

 		Experiences and lessons learned from EP scientific workflow

15'

9:15-9:30

 		An automated and efficient workflow is crucial for scientific output in astronomy, particularly in time-domain astronomy. The National Astronomical Data Centre (NADC) has undertaken the development of the workflow for the Einstein Probe(EP), a high-energy X-ray satellite focused on time-domain astronomy. During the development process, we encountered challenges including workflow orchestration, workflow scalability, and the traceability of data product generation processes. To address these issues, we developed a workflow framework based on cloud technologies, including containers, message queues, and workflow orchestrators etc. This framework offers excellent scalability and portability and significantly enhance the efficiency of complex algorithm integration and deployment in multi-team collaborations. Finally, we proposed our recommendation for provenance and workflow data model. This framework can be further applied to future time-domain astronomy projects, and we hope that our experiences can provide insights for the IVOA workflow standards.  
Baptiste Cecconi Workflow orchestration for radio interferometric imaging using EXTRACT

15'

9:30-9:45

 		We present the result of the EXTRACT project, which is proposing a compute continuum framework (with edge, cloud and HPC compute resources) on a distributed data environment. In our presentation, we will show how we deploy multiple cloud-ready and HPC-ready technologies to furnish radio astronomers with a simple interface to describe data processing workflows which dramatically lowers the difficulty threshold of using complex tools from the radio interferometric community. In the case of NenuFAR, we propose workflows to dynamically process the imaging data of the dynamic Sun, which enables the astrometric localisation of the solar bursts (Type II, Type III bursts), and planets (e.g. Jupiter, exoplanets), complementary to beamformed observations. This workflow integrates classical LOFAR tools and methods as well as recent direction-dependent tools (e.g. DDFacet, killMS, DynSpecMS) to perform complex operations on interferometric data such as the processing of the NLFSS sky survey and the search for exoplanetary signatures using rebuilt dynamic spectra derived from imaging data.

We will discuss how this will be interfaced with IVOA standards, for data provenance and data discoverability.

 		 

Joshua Fraustro

(In person)

 		Generation of code from OpenAPI

15'

9:45-10:00

 		In the ongoing efforts within the International Virtual Observatory Alliance (IVOA), we are working to define our protocols using OpenAPI specifications. This approach aims to make our standards not only human-readable but also machine-actionable, thereby enhancing interoperability and automation. However, the generation of OpenAPI documentation from our existing protocol definitions presents several challenges and limitations.  

Mark Taylor

(Remote)

 		IVOA Authentication

15'

10:00-10:15

 		The challenge of enabling non-browser clients to authenticate against VO services has been the focus of several recent IVOA discussions. Building on consistent technical proposals presented at past Interops, this talk revisits the concept of an IVOA Identity and Access Management (IVOA-IAM) document, originally suggested in Malta. The speaker will summarise existing implementations—such as ivoa_cookie and ivoa_x509 schemes in production at ESAC and CADC—and explore how these mechanisms align with standard HTTP authentication headers and VO capabilities endpoints. Despite practical adoption, standardisation efforts have stalled, leaving documentation scattered and inconsistent. This session will assess the current state, revisit the rationale for a focused IVOA-IAM document with reduced scope, and propose a way forward—potentially including a community-reviewed draft authored by the speaker.  
All Brainstorming on IVOA Authentication

15'

10:15-10:30

 		   
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Topic revision: r4 - 2025-05-14 - JesusSalgado
 
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