Design of the J-PAS and J-PLUS filter systems

Marín-Franch, A.; Chueca, S.; Moles, M.; Benítez, N.; Taylor, Keith F.; Cepa, J.; Cenarro, A. J.; Cristóbal-Hornillos, D.; Ederoclite, A.; Gruel, N.; Hernández-Fuertes, J.; López-Sáinz, Á.; Luis-Simoes, R.; Rueda-Teruel, F.; Rueda-Teruel, S.; Varela, J.; Yanes-Díaz, A.; Brauneck, Ulf; Danielou, A.; Dupke, Renato A.; Fernández-Soto, A.; Oliveira, C. Mendes de; Sodré, L.

doi:10.1117/12.925430

Cited by 30 publications

(11 citation statements)

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“…The main survey strategy is aimed at obtaining large coverage of the Southern sky (∼ 9000 deg 2 ) for astronomical and cosmological studies in the local universe. The S-PLUS uses the same photometric system of the J-PLUS survey (Marín-Franch et al 2012), which consists of twelve optical bands, including 5 broad-bands similar to those used by the Sloan digital sky survey (SDSS) ugriz system, and a set of seven narrow-band (∆λ = 100 − 200Å) filters placed at various rest-frame optical features, including [OII] (λ eff = 3771Å), Ca H+K (λ eff = 3941Å), Hδ (λ eff = 4094Å), G-band (λ eff = 4292Å), Mg b triplet (λ eff = 5133Å), Hα (λ eff = 6614 A) and the Ca triplet (λ eff = 8611Å). Considering a signal-to-noise ratio (SNR) threshold of 3, the survey is complete in the broad bands to magnitudes of u = 21.07, g = 21.79, r = 21.6, i = 21.22 and z = 20.64, whereas it is complete to magnitudes of ∼ 20.4 in all narrow bands (Mendes de Oliveira et al 2019).…”

Section: S-plus Dr1 Datamentioning

confidence: 99%

One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

Barbosa

Zaritsky

Donnerstein

et al. 2020

ApJS

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We present the first systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field, integrating the large area search and characterization of UDGs by the SMUDGes survey with the twelve-band optical photometry of the S-PLUS survey. Based on Bayesian modeling of the optical colors of UDGs, we determine the ages, metallicities and stellar masses of 100 UDGs distributed in an area of ∼ 330 deg 2 in the Stripe 82 region. We find that the stellar masses and metallicities of field UDGs are similar to those observed in clusters and follow the trends previously defined in studies of dwarf and giant galaxies. However, field UDGs have younger luminosityweighted ages than do UDGs in clusters. We interpret this result to mean that field UDGs have more extended star formation histories, including some that continue to form stars at low levels to the present time. Finally, we examine stellar population 2 Barbosa et al.scaling relations that show that UDGs are, as a population, similar to other low-surface brightness galaxies.

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Section: S-plus Dr1 Datamentioning

confidence: 99%

One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

Barbosa

Zaritsky

Donnerstein

et al. 2020

ApJS

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“…This survey will be done using a system of 12 filters: 4 Sloan (g,r,i,z) filters, 6 intermediate width filters located at the rest-frame position of key spectral features for stellar classification and stellar population studies, and 2 narrow band filters in common with J-PAS (OII and Hα), to have further details see the contribution on the J-PAS and J-PLUS filter systems. 3 Apart from the J-PAS calibration goals, J-PLUS represents an extraordinary added value to perform studies on Stellar Populations of nearby galaxies, Extragalactic Tidal Streams , SNe, GRBs, Milky Way science, Solar System Minor Bodies, etc. J-PLUS will reach magnitude AB = 23 (5σ level) in the four SDSS filters.…”

Section: Introductionmentioning

confidence: 99%

J-PAS data management pipeline and archiving

et al. 2012

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J-PAS survey is going to observe 8000 deg 2 in 54 optical narrow band filters plus 3 broad band ones. The survey will produce 1.2 PB of raw data in six years of observations. The treatment of about 1.5 TB per night, coming from the 14 detectors of the JPCam camera in the JST/T250, plus one detector in the JAST/T80 camera, shall be performed during the day after the operations. This contribution presents the software and hardware architecture designed to process and validate the data. The processing of the images is divided in two main stages. The first one, which deals with instrumental correction and data validation, is run daily. The second stage is run when a tile is completed and do the combination of the individual corrected frames and weight maps. To perform the astrometric calibration, image coadding and source extraction the data management pipeline uses software from the community which is integrated through Python. The software uses a database to control the process by storing the operations performed, parameters used and quality checks. This allows fast reprocessing to retrieve intermediate stages of the treatment from the raw data for any data release. This approach saves disk space by avoiding the storage of the processed individual frames. The data archiving and processing will be done in a data center 30 km away from the observatory. It will be equipped with ∼ 2.5 PB of storage capacity to store the raw data and the final mosaics of the 57 filters, and processing power to deal with the incoming data.

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“…Filter wheels control is performed using stepper motors and absolute rotary encoders. The T80Cam is optimized to operate in the wavelength range 330-1000nm through a set of 12 carefully optimized broad, intermediate-and narrow-band filters 4,5 . Figure 3 shows the transmission curves of the 12 filters that T80Cam will mount to carry out the J-PLUS survey.…”

Section: Filter Unitmentioning

confidence: 99%

“…This survey will observe the same area as the J-PAS through a set of 12 carefully optimized broadand narrow-band filters 4 . J-PLUS will be completed in about 2 years and will reach AB∼ 23 mag (5σ level) with the SDSS filters.…”

Section: Introduction the Centro De Estudios De Física Del Cosmos De mentioning

confidence: 99%

“…J-PAS is an innovative photometric survey of the northern sky using an unprecedented system of 56 filters 4 , 54 narrow-band (FWHM ~13.8nm), plus 2 broad-band filters, covering the 330-1000nm wavelength range, over more than 8000 square degrees. The J-PAS survey will reach AB=22-23 within 3 arcsec aperture at 5σ level, depending on the wavelength.…”

Section: Introduction the Centro De Estudios De Física Del Cosmos De mentioning

confidence: 99%

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T80Cam: the wide field camera for the OAJ 83-cm telescope

Marín-Franch

Taylor²,

Cepa

et al. 2012

SPIE Proceedings

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The Observatorio Astrofísico de Javalambre (OAJ) is a new astronomical facility located at the Sierra de Javalambre (Teruel, Spain) whose primary role will be to conduct all-sky astronomical surveys. The OAJ facility will have two wide-field telescopes: the JST/T250; a 2.55-m telescope with a 3º diameter field of view (FoV), and the JAST/T80; an 0.83-m telescope with a 2º diameter FoV. First light instrumentation is being designed to exploit the survey capabilities of the OAJ telescopes. This paper describes the T80Cam, a wide-field camera that will be installed at the Cassegrain focus of the JAST/T80. It is equipped with an STA 1600 backside illuminated detector. This is a 10.5k-by-10.5k, 9µm pixel, high efficiency CCD that is read from 16 ports simultaneously, allowing read times of ~20s with a typical read noise of 6 electrons (rms). This full wafer CCD covers a large fraction of the JAST/T80's FoV with a pixel scale of ~0.50"/pixel. T80Cam will observe in the wavelength range 330-1000nm through a set of 12 carefully optimized broad-, intermediate-and narrow-band filters. The camera is intended for surveys with the JAST/T80 telescope, starting with the planned J-PLUS (Javalambre Photometric Local Universe Survey), a multi-band photometric all-sky survey that will be completed in about 2 years and will reach AB∼ 23 mag (5σ level) with the SDSS filters.

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Design of the J-PAS and J-PLUS filter systems

Cited by 30 publications

References 0 publications

One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

J-PAS data management pipeline and archiving

T80Cam: the wide field camera for the OAJ 83-cm telescope

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