J-PAS

{{Infobox Telescope}}

J-PAS (Javalambre Physics of the Accelerating universe Astrophysical Survey) is an astronomical survey{{cite journal |last1=Bonoli |first1=S. |last2=Marín-Franch |first2=A. |last3=Varela |first3=J. |last4=Vázquez Ramió |first4=H. |last5=Abramo |first5=L.R. |last6=Cenarro |first6=J. |last7=Dupke |first7=R.A. |last8=et |first8=al. |title=The miniJPAS survey: A preview of the Universe in 56 colors |journal=Astronomy and Astrophysics |date=September 2021 |volume=653 |page=A31 |doi=10.1051/0004-6361/202038841 |arxiv=2007.01910 |bibcode=2021A&A...653A..31B}} is being carried out by the Astrophysical Observatory of Javalambre (OAJ), located in Pico del Buitre in Sierra de Javalambre, in Teruel, Spain.

J-PAS officially started in the summer of 2023.{{cite web |last1=Valdivielso Casas |first1=L. |title=The largest mapping of the Cosmos begins |url=https://www.cefca.es/news/show/index/252 |website=CEFCA NEWS |publisher=CEFCA |access-date=4 November 2023}}

OAJ is managed by Aragon Center for Physics of the Cosmos (CEFCA) and consists of two telescopes: a 2.5-metre primary mirror telescope (JST/T250) and an 80-centimeter telescope (JAST/T80). J-PAS is surveying the sky with JST/T250 telescope which has a 1.2 Giga-pixel camera, constituted by an array of 14 CCDs. J-PAS will observe more than 8000 square degrees (about 1/5 of the whole sky) in 57 filters during 5 to 6 years.

J-PAS filters cover the entire visible region of the electromagnetic spectrum (3500 Å to 10000 Å){{Cite journal|last1=Dupke|first1=Renato A.|last2=Finoguenov|first2=Alexis|last3=Irwin|first3=Jimmy|last4=Bonoli|first4=Silvia|last5=Lopes De Oliveira|first5=Raimundo|last6=Cenarro|first6=Javier|last7=Marín Franch|first7=Antonio|last8=Abramo|first8=Raul|last9=Vilchez|first9=Jose|last10=Collaboration|first10=Jpas|date=March 2019|title=J-PAS/eROSITA Joint Cluster/AGN Survey|url=https://ui.adsabs.harvard.edu/abs/2019HEAD...1710717D/abstract|journal=HEAD|volume=17|language=en|pages=107.17|bibcode=2019HEAD...1710717D}} and can be classified as:

• 54 narrow-band (roughly 14-nanometer width) filters.
• 2 medium-band (roughly 50-nanometer width) filters; these are located on the extreme blue and extreme red of the spectral coverage of J-PAS filters.
• 1 broad-band iSDSS (roughly 200-nanometer width) filter; which is also used as the detection filter.