J-PLUS-EDR - Data Access Services

J-PLUS Early Data Release (September, 2017) provides access to the combined scientific images in 12 filters covering a total area of 36deg2 (31.7deg2 after masking). EDR is based on images collected from December 2016 to February 2017 by the JAST/T80 telescope. It includes two types of data: images and single and dual catalogue data (parameters measured from images, such as photometry or morphology data). Single catalogues are the ones where the detection and photometry had been done on each image independently. While, dual catalogues are the catalogues where the detection and photometry had been done using as reference image the r-SDSS image.

J-PLUS web site offers dual 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. Single catalogue data is also available but, currently, only through V.O. services.

Tool What it Does Use it when...
Sky Navigator Lets you navigate through the sky by panning and zooming. When you click on an object, you get a summary of it and you have options to see its pseudospectrum, explore it or search it in other catalogues. You are looking through the sky for objects to study.
Object List Search Lets you upload a list of sky positions, object names or objects identifiers, then returns a list of J-PLUS objects near those positions. Displays a summary, pseudospectra and thumbnail images for the list of objects. You want to quickly scan through a list of objects or you have a list of sky objects from another astronomical database and you want to find all J-PLUS objects near each of your objects. You want to create a report of a list of objects.
Image Search Lets you search and download images by position or name. Lets you see a preview for each image. You want to look at or download an image.
Cone Search Lets you search the database for objects near a certain sky position and with certain brightnesses. You want to find objects in one part of the sky.
Coverage Map Lets you the know the sky area covered by the data release. You want to know the fields covered by the data release. These fields are linked to see them quickly in the sky navigator tool.
ASCII Image Catalogues Lets you download the ASCII catalogues files directly. You want to download an ASCII catalogue. These catalogues are ordered by DEC position and image name.
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), Simple Image Access Protocol (SIAP) and Simple Spectral Access Protocol (SSAP). 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). You want to answer a specific astronomical research question.
Please send bug reports, questions and comments to j-plus@cefca.es. In case you encounter a problem, please include as much information as possible so we can reproduce it (such as URL, time, operating system, browser, ...).