Dear Fred,
thanks again for your feedback!
The origin of the inconsistencies you found is rooted in the subsequent deployment of the relevant features. The releases relevant for this topic are:
- v2.23.0 (date: 2025-07-07): While the lightcurve figures where introduced end of 2024 (with release v2.19.0), we only added the possibility to download the data in CSV format with this release. Events before that typically do not have a CSV and VOTable available (e.g. SN 2025fel)
- v2.28.0 (date: 2026-03-31): This is the release which added the support for VO formats and integrations. This included the storage of photometric data in the VOTable format and all events after that date should have both formats. Some of the events you mention (SN 2025myd and SN 2025myd) have been detected between these two releases, they therefore only have the CSV data but not yet the VOTable format.
I hope this explains the mixed availabilities you observed.
The good news is that this concerns only the photometric data produced automatically. You can easily recreate that data (incl. extend the default time window, add new surveys, etc.) via the custom lightcurve requests. Once this request is done, the data download button will serve you the requested data in both, CSV and VOTable formats.