J/PASP/131/G5001ivo://CDS.VizieR/J/PASP/131/G5001doi:10.26093/cds/vizier.61324001CDSRatzloff J.K.Law N.M.Fors O.Corbett H.T.Howard W.S.del Ser D.,Haislip J.2025-09-09T14:15:00Z2019-06-03T09:51:47ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starseclipsing-binary-starsThe Evryscope is a telescope array designed to open a new parameter space in optical astronomy, detecting short-timescale events across extremely large sky areas simultaneously. The system consists of a 780 MPix 22-camera array with an 8150 sq. deg. field of view, 13'' per pixel sampling, and the ability to detect objects down to m_g'_~=16 in each 2-minute dark-sky exposure. The Evryscope, covering 18400 sq. deg. with hours of high-cadence exposure time each night, is designed to find the rare events that require all-sky monitoring, including transiting exoplanets around exotic stars like white dwarfs and hot subdwarfs, stellar activity of all types within our galaxy, nearby supernovae, and other transient events such as gamma-ray bursts and gravitational-wave electromagnetic counterparts. The system averages 5000 images per night with ~300000 sources per image, and to date has taken over 3.0M images, totaling 250 TB of raw data. The resulting light curve database has light curves for 9.3M targets, averaging 32600 epochs per target through 2018. This paper summarizes the hardware and performance of the Evryscope, including the lessons learned during telescope design, electronics design, a procedure for the precision polar alignment of mounts for Evryscope-like systems, robotic control and operations, and safety and performance-optimization systems. We measure the on-sky performance of the Evryscope, discuss its data analysis pipelines, and present some example variable star and eclipsing binary discoveries from the telescope. We also discuss new discoveries of very rare objects including two hot subdwarf eclipsing binaries with late M-dwarf secondaries (HW Vir systems), two white dwarf/hot subdwarf short-period binaries, and four hot subdwarf reflection binaries. We conclude with the status of our transit surveys, M-dwarf flare survey, and transient detection.2019PASP..131g5001Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/131/G5001CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/131/G5001https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/131/G5001http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/131/G5001https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/131/G5001https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/131/G5001http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/131/G5001GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/131/G5001/table4 (Variable star discoveries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/131/G5001/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/131/G5001/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/131/G5001/table4?GETtext/xml+votable180.050000true22.8816.31530.005555555555555556Cone search capability for table J/PASP/131/G5001/table6 (Eclipsing binary discoveries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/131/G5001/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/131/G5001/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/131/G5001/table6?GETtext/xml+votable180.050000true85.85347.01210.0055555555555555566/75 96 132 4148 8244 12333 12349 12361 12452 18227 18938 22255 22270 22344 23255 23288 23614 23616 23623 23684 26444 26466 27816 30173 30192 30194 30205 30423 30460 30494 30530 30535 30538 30541 30592 30596-30597 30601 30609-30611 31222 31455 31468 31476 31480 31585 31796-31797 31800 31809 31813 31817-31818 31822 31843 31885https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/131/G5001?format=asciidefaultJ/PASP/131/G5001/table4Variable star discoveriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintESIDES ID (EVRJHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharGaiaDR2GaiaDR2 source number (source_id)meta.idRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatRPM? Reduced proper motionphys.magAbsfloatnullableB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableSizeStar size (ms or giant)meta.codecharSpTypeSpectral typesrc.spTypecharPeriodPeriodhtime.perioddoubleAmpAmplitude of the variabilitymagsrc.varfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/PASP/131/G5001/table6Eclipsing binary discoveriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintESIDES ID (EVRJHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharGaiaDR2GaiaDR2 source number (source_id)meta.idRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatRPM? Reduced proper motionphys.magAbsfloatnullableB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableSizeStar size (ms or giant)meta.codecharSpTypeSpectral typesrc.spTypecharPeriodPeriodhtime.perioddoubleAmpAmplitude of the variabilitymagsrc.varfloatSimbadSimbad column added by the CDSmeta.ref.urlchar