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We present the first linear polarimetric survey of white dwarfs (WDs). Our sample consists of WDs of DA and DC spectral types in the SDSS r magnitude range from 13 to 17. We performed polarimetric observations with the RoboPol polarimeter…

太阳与恒星天体物理 · 物理学 2016-09-15 M. Żejmo , A. Słowikowska , K. Krzeszowski , P. Reig , D. Blinov

We present the on-site rotation performance of the first three cryogenic continuously rotating half-wave plate (HWP) polarization modulators for the Simons Observatory small aperture telescopes (SATs). The SATs operate at an altitude of…

Polarimetric interferometry is a method allowing the study of the distribution of polarized flux at diffraction-limited resolution. Its basic observable is the ratio $\mathcal{R}$ of the visibilities of the object in two orthogonal…

天体物理仪器与方法 · 物理学 2019-02-27 Boris Safonov , Pavel Lysenko , Maria Goliguzova , Dmitry Cheryasov

In this paper we present an error analysis for polarimetric data obtained with dual-beam instruments. After recalling the basic concepts, we introduce the analytical expressions for the uncertainties of polarization degree and angle. These…

天体物理学 · 物理学 2009-11-11 Ferdinando Patat , Martino Romaniello

CONTEXT.Large field-of-view imaging/polarimetry instruments operating at millimeter and submm wavelengths are fundamental tools to understand the role of magnetic fields (MF) in channeling filament material into prestellar cores providing a…

The ultra-violet (UV) high-resolution spectropolarimeter Pollux is being studied in Europe under CNES leadership for the LUVOIR space mission. LUVOIR is a projected 15-m telescope equipped with a suite of instruments proposed to NASA.…

天体物理仪器与方法 · 物理学 2019-07-30 Maelle Le Gal , Arturo Lopez Ariste , Coralie Neiner

Direction-dependent instrumental polarisation introduces wide-field polarimetric aberrations and limits the dynamic range of low-frequency interferometric images. We therefore provide a detailed two-dimensional analysis of the Giant…

天体物理仪器与方法 · 物理学 2014-07-03 J. S. Farnes

We present a concept for using a polarization sensitive multispectral lidar to map the seasonal distribution and exchange of volatiles among the reservoirs of the Martian surface and atmosphere. The LIDAR instrument will be a…

Polarization plays an important role in various time-domain astrophysics to understand the magnetic fields, geometry, and environments of spatially unresolved variable sources. In this paper we present the results of laboratory and on-sky…

天体物理仪器与方法 · 物理学 2020-04-29 Manisha Shrestha , Iain A. Steele , Andrez S. Piascik , Helen Jermak , Robert J. Smith , Chris M. Copperwheat

The Near-Infrared Spectrometer and Photometer (NISP) on board the Euclid satellite provides multiband photometry and R>=450 slitless grism spectroscopy in the 950-2020nm wavelength range. In this reference article we illuminate the…

天体物理仪器与方法 · 物理学 2025-04-30 Euclid Collaboration , K. Jahnke , W. Gillard , M. Schirmer , A. Ealet , T. Maciaszek , E. Prieto , R. Barbier , C. Bonoli , L. Corcione , S. Dusini , F. Grupp , F. Hormuth , S. Ligori , L. Martin , G. Morgante , C. Padilla , R. Toledo-Moreo , M. Trifoglio , L. Valenziano , R. Bender , F. J. Castander , B. Garilli , P. B. Lilje , H. -W. Rix , N. Auricchio , A. Balestra , J. -C. Barriere , P. Battaglia , M. Berthe , C. Bodendorf , T. Boenke , W. Bon , A. Bonnefoi , A. Caillat , V. Capobianco , M. Carle , R. Casas , H. Cho , A. Costille , F. Ducret , S. Ferriol , E. Franceschi , J. -L. Gimenez , W. Holmes , A. Hornstrup , M. Jhabvala , R. Kohley , B. Kubik , R. Laureijs , D. Le Mignant , I. Lloro , E. Medinaceli , Y. Mellier , G. Polenta , G. D. Racca , A. Renzi , J. -C. Salvignol , A. Secroun , G. Seidel , M. Seiffert , C. Sirignano , G. Sirri , P. Strada , G. Smadja , L. Stanco , S. Wachter , S. Anselmi , E. Borsato , L. Caillat , F. Cogato , C. Colodro-Conde , P. -E. Crouzet , V. Conforti , M. D'Alessandro , Y. Copin , J. -C. Cuillandre , J. E. Davies , S. Davini , A. Derosa , J. J. Diaz , S. Di Domizio , D. Di Ferdinando , R. Farinelli , A. G. Ferrari , F. Fornari , L. Gabarra , C. M. Gutierrez , F. Giacomini , P. Lagier , F. Gianotti , O. Krause , F. Madrid , F. Laudisio , J. Macias-Perez , G. Naletto , M. Niclas , J. Marpaud , N. Mauri , R. da Silva , F. Passalacqua , K. Paterson , L. Patrizii , I. Risso , B. G. B. Solheim , M. Scodeggio , P. Stassi , J. Steinwagner , M. Tenti , G. Testera , R. Travaglini , S. Tosi , A. Troja , O. Tubio , C. Valieri , C. Vescovi , S. Ventura , N. Aghanim , B. Altieri , A. Amara , J. Amiaux , S. Andreon , H. Aussel , M. Baldi , S. Bardelli , A. Basset , A. Bonchi , D. Bonino , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , C. Carbone , V. F. Cardone , J. Carretero , S. Casas , M. Castellano , S. Cavuoti , P. -Y. Chabaud , A. Cimatti , G. Congedo , C. J. Conselice , L. Conversi , F. Courbin , H. M. Courtois , M. Cropper , J. -G. Cuby , A. Da Silva , H. Degaudenzi , A. M. Di Giorgio , J. Dinis , M. Douspis , F. Dubath , C. A. J. Duncan , X. Dupac , M. Fabricius , M. Farina , S. Farrens , F. Faustini , P. Fosalba , S. Fotopoulou , N. Fourmanoit , M. Frailis , P. Franzetti , S. Galeotta , B. Gillis , C. Giocoli , P. Gómez-Alvarez , B. R. Granett , A. Grazian , L. Guzzo , M. Hailey , S. V. H. Haugan , J. Hoar , H. Hoekstra , I. Hook , P. Hudelot , B. Joachimi , E. Keihänen , S. Kermiche , A. Kiessling , M. Kilbinger , T. Kitching , M. Kümmel , M. Kunz , H. Kurki-Suonio , O. Lahav , V. Lindholm , J. Lorenzo Alvarez , D. Maino , E. Maiorano , O. Mansutti , O. Marggraf , K. Markovic , J. Martignac , N. Martinet , F. Marulli , R. Massey , D. C. Masters , S. Maurogordato , H. J. McCracken , S. Mei , M. Melchior , M. Meneghetti , E. Merlin , G. Meylan , J. J. Mohr , M. Moresco , L. Moscardini , R. Nakajima , R. C. Nichol , S. -M. Niemi , T. Nutma , K. Paech , S. Paltani , F. Pasian , J. A. Peacock , K. Pedersen , W. J. Percival , V. Pettorino , S. Pires , M. Poncet , L. A. Popa , L. Pozzetti , F. Raison , R. Rebolo , A. Refregier , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , C. Rosset , E. Rossetti , H. J. A. Rottgering , R. Saglia , D. Sapone , M. Sauvage , R. Scaramella , P. Schneider , T. Schrabback , S. Serrano , P. Tallada-Crespí , D. Tavagnacco , A. N. Taylor , H. I. Teplitz , I. Tereno , F. Torradeflot , I. Tutusaus , T. Vassallo , G. Verdoes Kleijn , A. Veropalumbo , D. Vibert , Y. Wang , J. Weller , A. Zacchei , G. Zamorani , F. M. Zerbi , J. Zoubian , E. Zucca , P. N. Appleton , C. Baccigalupi , A. Biviano , M. Bolzonella , A. Boucaud , E. Bozzo , C. Burigana , M. Calabrese , P. Casenove , M. Crocce , G. De Lucia , J. A. Escartin Vigo , G. Fabbian , F. Finelli , K. George , J. Gracia-Carpio , S. Ilić , P. Liebing , C. Liu , G. Mainetti , S. Marcin , M. Martinelli , P. W. Morris , C. Neissner , A. Pezzotta , M. Pöntinen , C. Porciani , Z. Sakr , V. Scottez , E. Sefusatti , M. Viel , M. Wiesmann , Y. Akrami , V. Allevato , E. Aubourg , M. Ballardini , D. Bertacca , M. Bethermin , A. Blanchard , L. Blot , S. Borgani , A. S. Borlaff , S. Bruton , R. Cabanac , A. Calabro , G. Calderone , G. Canas-Herrera , A. Cappi , C. S. Carvalho , G. Castignani , T. Castro , K. C. Chambers , Y. Charles , R. Chary , J. Colbert , S. Contarini , T. Contini , A. R. Cooray , M. Costanzi , O. Cucciati , B. De Caro , S. de la Torre , G. Desprez , A. Díaz-Sánchez , H. Dole , S. Escoffier , P. G. Ferreira , I. Ferrero , A. Finoguenov , A. Fontana , K. Ganga , J. García-Bellido , V. Gautard , E. Gaztanaga , G. Gozaliasl , A. Gregorio , A. Hall , W. G. Hartley , S. Hemmati , H. Hildebrandt , J. Hjorth , S. Hosseini , M. Huertas-Company , O. Ilbert , J. Jacobson , S. Joudaki , J. J. E. Kajava , V. Kansal , D. Karagiannis , C. C. Kirkpatrick , F. Lacasa , V. Le Brun , J. Le Graet , L. Legrand , G. Libet , S. J. Liu , A. Loureiro , M. Magliocchetti , C. Mancini , F. Mannucci , R. Maoli , C. J. A. P. Martins , S. Matthew , L. Maurin , C. J. R. McPartland , R. B. Metcalf , M. Migliaccio , M. Miluzio , P. Monaco , C. Moretti , S. Nadathur , L. Nicastro , Nicholas A. Walton , J. Odier , M. Oguri , V. Popa , D. Potter , A. Pourtsidou , P. -F. Rocci , R. P. Rollins , B. Rusholme , M. Sahlén , A. G. Sánchez , C. Scarlata , J. Schaye , J. A. Schewtschenko , A. Schneider , M. Schultheis , M. Sereno , F. Shankar , A. Shulevski , G. Sikkema , A. Silvestri , P. Simon , A. Spurio Mancini , J. Stadel , S. A. Stanford , K. Tanidis , C. Tao , N. Tessore , R. Teyssier , S. Toft , M. Tucci , J. Valiviita , D. Vergani , F. Vernizzi , G. Verza , P. Vielzeuf , J. R. Weaver , L. Zalesky , I. A. Zinchenko , M. Archidiacono , F. Atrio-Barandela , C. L. Bennett , T. Bouvard , F. Caro , S. Conseil , P. Dimauro , P. -A. Duc , Y. Fang , A. M. N. Ferguson , T. Gasparetto , I. Kova{č}ić , S. Kruk , A. M. C. Le Brun , T. I. Liaudat , A. Montoro , A. Mora , C. Murray , L. Pagano , D. Paoletti , M. Radovich , E. Sarpa , E. Tommasi , A. Viitanen , J. Lesgourgues , M. E. Levi , J. Martín-Fleitas

We have built a polarimeter in order to measure the electron beam polarization in hall C at JLAB. Using a superconducting solenoid to drive the pure-iron target foil into saturation, and a symmetrical setup to detect the Moller electrons in…

Polarization leakage of foreground synchrotron emission is a critical issue in HI intensity mapping experiments. While the sought-after HI emission is unpolarized, polarized foregrounds such as Galactic and extragalactic synchrotron…

天体物理仪器与方法 · 物理学 2016-12-28 Yu-Wei Liao , Tzu-Ching Chang , Cheng-Yu Kuo , Kiyoshi Wesley Masui , Niels Oppermann , Ue-Li Pen , Jeffrey B. Peterson

Most optical spectropolarimeters built to date operate as long-slit or point-source instruments; they are inefficient for observations of extended objects such as galaxies and nebulae. 2D spectropolarimetry technique development is a major…

天体物理仪器与方法 · 物理学 2024-07-23 Siddharth Maharana , Sabyasachi Chattopadhyay , Matthew Bershady

Speckle polarimeter (SPP) is a facility instrument of the 2.5-m telescope of the Caucasian Mountain Observatory of SAI MSU. By design it is a combination of a speckle interferometer and a dual--beam polarimeter. In 2022 we performed a major…

天体物理仪器与方法 · 物理学 2024-09-17 I. A. Strakhov , B. S. Safonov , D. V. Cheryasov

Front-end polarization modulation enables improved polarization measurement stability by modulating the targeted signal above the low-frequency $1/f$ drifts associated with atmospheric and instrumental instabilities and diminishes the…

In preparation for James Webb Space Telescope (JWST), a set of cross calibration programs with HST and Spitzer for suitable primary photometric standards and astrometric fields were developed. NICMOS/HST and IRAC/Spitzer photometry…

天体物理学 · 物理学 2007-05-23 Rosa I. Diaz-Miller

The James Webb Space Telescope near-infrared camera (JWST NIRCam) has two 2.'2 $\times$ 2.'2 fields of view that are capable of either imaging or spectroscopic observations. Either of two $R \sim 1500$ grisms with orthogonal dispersion…

NICSPol is a near infrared imaging polarimeter developed for the Near Infrared Camera and Spectrograph (NICS), one of the back end instruments of the 1.2 m Cassegrain telescope at the Mount Abu Infrared Observatory (MIRO), India. The…

天体物理仪器与方法 · 物理学 2019-08-08 Esakkiappan Aarthy , Archita Rai , Shashikiran Ganesh , Santosh V. Vadawale