HATS/LSDB Working Group Demo meetings for October 2025: October 23 for Europe, October 24 for Americas

[Neven Caplar]

Dear all,

Since we postponed our Americas-based working group meeting last week, we are holding both Europe- and Americas-based time zone meetings this week.

Both meetings will be at https://cmu.zoom.us/j/92939204460?pwd=aGdXTFQ5d1pTVmI1a0t3d0UwTzRhQT09

On Thursday, October 23, 2025, for the Europe time meeting, we will meet at 6 am Pacific, 9 am Eastern, 3 pm Central European Time.
The notes document is here: https://docs.google.com/document/d/1qE_zmRcWzFKf16ZFKQ0izct7k_nj0r371dH54mLqThQ/

On Friday, October 24, 2025, for the Americas time meeting, we will meet at 10am Pacific, 1 pm Eastern, 2 pm Brasília Time Zone.
The notes document is here: https://docs.google.com/document/d/1l86MuzfYROWfRg_tg4R7o38WvHXUurHUEknUFWeCI78/

The main topics will be updates from last week's busy week meeting and the action items and plans from this meeting. I want to highlight:
- Updates on IVOA note, VOParquet, and action items before next IVOA meeting
- Work on making the GAIA dataset (more) HATS compatible
- Plans for HATS catalogs served on Open Space buckets
- Integration of more advanced cross-matching methods with LSDB
- Efforts on enabling TAP-like queries on HATS catalogs

We hope to see many of you there at these meetings,
Melissa and Neven

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Neven Caplar
LINCC Frameworks
www.ncaplar.com

[Neven Caplar]

Dear all,

Since next week is Thanksgiving week, we will hold our Europe-based meeting early, i.e., this week. This means we are holding meetings in both Europe- and Americas-based time zones this week.

Both meetings will be at https://cmu.zoom.us/j/92939204460?pwd=aGdXTFQ5d1pTVmI1a0t3d0UwTzRhQT09

On Thursday, November 20, 2025 we will meet with our European-time zone partners at 6 am Pacific, 9 am Eastern, 3 pm Central European Time.

The notes document is here: https://docs.google.com/document/d/1qE_zmRcWzFKf16ZFKQ0izct7k_nj0r371dH54mLqThQ/

On Friday, November 21, 2025 we will meet at 10 am Pacific, 1 pm Eastern, 3 pm Brasília Time Zone.

The notes document is here: https://docs.google.com/document/d/1l86MuzfYROWfRg_tg4R7o38WvHXUurHUEknUFWeCI78/

The main topic for the Americas-time zone meeting will be updates from the IVOA Goerlitz meeting, as well as the updates and improvements in the HATS/LSDB ecosystem over the last couple of months. I want to highlight:
- Updates on IVOA note, VOParquet, and providing HATS-on-the-fly catalogs developed by CDS more publicly
- Updates from LIneA on Python pipeline that generates HiPS-compliant catalogs, using HATS catalogs as inputs.
- Demo/report on Rubin Prompt Processing database (i.e., incremental catalogs) adoption
- Demo/report on TAP / ADQL layer to query HATS catalogs
- Demo/report on recent performance updates in LSDB
- Demo/report on implementing Left join in LSDB

Please let us know before or at the meeting if there are further updates or topics that you would like to propose.

[Neven Caplar]

Dear all,

As you might have seen in our #lincc-frameworks-lsdb channel on Discovery Alliance Slack, we have decided to skip this month's Americas-time zone meeting scheduled for December 19, as many participants will be away for the end-of-year break. The next Americas-time zone meeting will be on January 16, 2026.

We still plan to hold our Europe-based meeting on December 18 at 6 am Pacific, 9 am East, and 3 pm CET. The meeting will be at https://cmu.zoom.us/j/92939204460?pwd=aGdXTFQ5d1pTVmI1a0t3d0UwTzRhQT09, and the notes are avaliable at https://docs.google.com/document/d/1qE_zmRcWzFKf16ZFKQ0izct7k_nj0r371dH54mLqThQ/edit?tab=t.0

Kind Regards,