MUDEHaR DR1 Data Release (March, 2025) provides access to the multi-epoch photometry information tabulated for a total area of ~40deg2. Two narrow filters are observed, one on top of the Hα line (J0660) and one the calcium triplet window (J0861). DR1 is based on observations collected from January 2023 to January 2024 by the JAST80 telescope. All sources with either Gaia or 2MASS ID have been considered and information extracted and tabulated from the images. Data is provided for each of the pointings to each of the 20 fields, with each pointing containing an average of 5 valid, nearly consecutive epochs for each star. These pointings are further separated by different nights and weeks.
MUDEHaR web site offers catalogues data through several different online data access tools, each suited to a particular need. The table below gives a short description of each of tool indicating when you might use each one, based on what information you know already and what information you want to find out. Click on the name of a tool to access to it.
| Tool | What it Does | Use it when... |
|---|---|---|
| V.O. Services | Lets you access to images and objects data through Virtual Observatory (V.O.) protocols using V.O. compatible applications. V.O. services offered are Simple Cone Search (SCS), Table Access Protocol (TAP), . | You want to use a V.O. compatible application to access catalogue data or images and you want to know the URL of the service. |
| V.O. Asynchronous Queries (ADQL) | Lets you search the database for all objects that meet any criteria you can think of, then returns whatever object data you request. Database queries are in Astronomical Data Query Language (ADQL), which is basically a standardised version of SQL (ADQL help and examples). This service is only available if you have logged in. | You want to answer a specific astronomical research question. |