Limiting magnitude
View article
The Zwicky Transient Facility: Data Processing, Products, and Archive Open
The Zwicky Transient Facility (ZTF) is a new robotic time-domain survey\ncurrently in progress using the Palomar 48-inch Schmidt Telescope. ZTF uses a\n47 square degree field with a 600 megapixel camera to scan the entire northern\nvisible…
View article
On the use of <i>Gaia</i> magnitudes and new tables of bolometric corrections Open
The availability of reliable bolometric corrections and reddening estimates, rather than the quality of parallaxes, will be one of the main limiting factors in determining the luminosities of a large fraction of Gaia stars. With this goal …
View article
SURVEYING THE BRIGHT STARS BY OPTICAL INTERFEROMETRY. I. A SEARCH FOR MULTIPLICITY AMONG STARS OF SPECTRAL TYPES F-K Open
We present the first results from an ongoing survey for multiplicity among the bright stars using the Navy Precision Optical Interferometer (NPOI). We first present a summary of NPOI observations of known multiple systems, including the fi…
View article
Project Overview of the Beijing–Arizona Sky Survey Open
The Beijing-Arizona Sky Survey (BASS) is a wide-field two-band photometric\nsurvey of the Northern Galactic Cap using the 90Prime imager on the 2.3 m Bok\ntelescope at Kitt Peak. It is a four-year collaboration between the National\nAstron…
View article
UCAC5: New Proper Motions Using Gaia DR1 Open
New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8–11 mag range as the reference star catalog. Significant improvemen…
View article
The VISTA ZYJHKs photometric system: calibration from 2MASS Open
In this paper we describe the routine photometric calibration of data taken\nwith the VIRCAM instrument on the ESO VISTA telescope. The broadband ZYJHKs\ndata are directly calibrated from 2MASS point sources visible in every VISTA\nimage. …
View article
The first interferometric detections of fast radio bursts Open
We present the first interferometric detections of fast radio bursts (FRBs), an enigmatic new class of astrophysical transient. In a 180-d survey of the Southern sky, we discovered three FRBs at 843 MHz with the UTMOST array, as a part of …
View article
Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array Open
We present a survey for transient and variable sources, on time-scales from 28 s to ~1 yr, using the Murchison Widefield Array (MWA) at 182 MHz. Down to a detection threshold of 0.285 Jy, no transient candidates were identified, making thi…
View article
THE SPITZER-HETDEX EXPLORATORY LARGE-AREA SURVEY Open
We present post-cryogenic Spitzer imaging at 3.6 and 4.5 μ m with the Infrared Array Camera (IRAC) of the Spitzer /HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers ≈24 deg 2 of the Sloan Digital Sky Survey “Stripe 82” region, and…
View article
Improving photometric redshift estimation using GPz: size information, post processing, and improved photometry Open
The next generation of large scale imaging surveys (such as those conducted with the Large Synoptic Survey Telescope and Euclid) will require accurate photometric redshifts in order to optimally extract cosmological information. Gaussian P…
View article
Globular clusters with Gaia Open
The treatment of crowded fields in Gaia data will only be a reality in a few\nyears from now. In particular, for globular clusters, only the end-of-mission\ndata (public in 2022-2023) will have the necessary full crowding treatment and\nwi…
View article
LAMOST Medium-Resolution Spectroscopic Survey (LAMOST-MRS): Scientific goals and survey plan Open
Since September 2018, LAMOST starts a new 5-year medium-resolution spectroscopic survey (MRS) using bright/gray nights. We present the scientific goals of LAMOST-MRS and propose a near optimistic strategy of the survey. A complete footprin…
View article
IGAPS: the merged IPHAS and UVEX optical surveys of the northern Galactic plane Open
The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys, IPHAS and UVEX, based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. Here, we present the IGAPS point source catalogue. …
View article
High-fidelity Simulations of the Near-Earth Object Search Performance of the Large Synoptic Survey Telescope Open
We perform high-fidelity simulations of a wide-field telescopic survey searching for Near-Earth Objects (NEOs) larger than 140 m, focusing on the observation and detection model, as well as detection efficiency and accuracy. As a test surv…
View article
Speckle Interferometric Observations With the Gemini 8-m Telescopes: Signal-to-Noise Calculations and Observational Results Open
Using 3 years of observations with the Zorro and ’Alopeke speckle interferometric instruments at Gemini South and North, respectively, we present an analysis of the sensitivity of the data taken in two narrow-band optical filters centered …
View article
The dark energy camera search for an optical counterpart to the first advanced LIGO gravitational wave event GW150914 Open
We report initial results of a deep search for an optical counterpart to the gravitational wave event GW150914, the first trigger from the Advanced LIGO gravitational wave detectors. We used the Dark Energy Camera (DECam) to image a 102 de…
View article
Detectability of kilonovae in optical surveys: <i>post-mortem</i> examination of the LVC O3 run follow-up Open
The detection of the binary neutron star (BNS) merger GW170817 and the associated electromagnetic (EM) counterpart, the ‘kilonova’ (kN) AT2017gfo, opened a new era in multimessenger astronomy. However, despite many efforts, it has been pro…
View article
The GLASS-JWST Early Release Science Program. II. Stage I Release of NIRCam Imaging and Catalogs in the Abell 2744 Region Open
We present images and a multiwavelength photometric catalog based on all of the JWST NIRCam observations obtained to date in the region of the Abell 2744 galaxy cluster. These data come from three different programs, namely, the GLASS-JWST…
View article
The fifth data release of the Kilo Degree Survey: Multi-epoch optical/NIR imaging covering wide and legacy-calibration fields Open
We present the final data release of the Kilo-Degree Survey (KiDS-DR5), a public European Southern Observatory (ESO) wide-field imaging survey optimised for weak gravitational lensing studies. We combined matched-depth multi-wavelength obs…
View article
The Stellar Abundances and Galactic Evolution Survey (SAGES). I. General Description and the First Data Release (DR1) Open
The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically designed multiband photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution op…
View article
MAXIMIZING THE DETECTION PROBABILITY OF KILONOVAE ASSOCIATED WITH GRAVITATIONAL WAVE OBSERVATIONS Open
Estimates of the source sky location for gravitational wave signals are likely to span areas of up to hundreds of square degrees or more, making it very challenging for most telescopes to search for counterpart signals in the electromagnet…
View article
Limiting Magnitudes of the Wide Field Survey Telescope (WFST) Open
Expected to be of the highest survey power telescope in the northern hemisphere, the Wide Field Survey Telescope (WFST) will begin its routine observations of the northern sky since 2023. WFST will produce a lot of scientific data to suppo…
View article
Precision stellar radial velocity measurements with FIDEOS at the ESO 1-m telescope of La Silla Open
We present results from the commissioning and early science programs of\nFIDEOS, the new high-resolution echelle spectrograph developed at the Centre of\nAstro Engineering of Pontificia Universidad Catolica de Chile, and recently\ninstalle…
View article
Comparing NEO Search Telescopes Open
Multiple terrestrial and space-based telescopes have been proposed for\ndetecting and tracking near-Earth objects (NEOs). Detailed simulations of the\nsearch performance of these systems have used complex computer codes that are\nnot widel…
View article
DDOTI: the deca-degree optical transient imager Open
DDOTI will be a wide-field robotic imager consisting of six 28-cm telescopes\nwith prime focus CCDs mounted on a common equatorial mount. Each telescope will\nhave a field of view of 12 square degrees, will have 2 arcsec pixels, and will\n…
View article
Optical design of the visible telescope for the SVOM mission Open
This paper describes the optical design of the visible telescope (VT), which is the primary payload for the Chinese-French Space-based multi-band astronomical Variable Objects Monitor (SVOM) mission, for the detection and observation of hi…
View article
Unidentified quasars among stationary objects from <i>Gaia</i> DR2 Open
Here we apply a technique selecting quasar candidates purely as sources with zero proper motions in the Gaia data release 2 (DR2). We demonstrate that this approach is highly efficient toward high Galactic latitudes with ≲25% contamination…
View article
CFHT MegaPrime/MegaCam u-band source catalogue of the AKARI North Ecliptic Pole Wide field Open
The $AKARI$ infrared (IR) space telescope conducted two surveys (Deep and Wide) in the North Ecliptic Pole (NEP) field to find more than 100 000 IR sources using its infrared camera (IRC). IRC’s nine filters, which cover wavebands from 2 t…
View article
The Palomar Transient Factory Sky2Night programme Open
We present results of the Sky2Night project: a systematic, unbiased search for fast optical transients with the Palomar Transient Factory. We have observed 407deg2 in R-band for eight nights at a cadence of 2 h. During the entire duration …
View article
Upgraded photometric system on the 85-cm telescope at Xinglong station Open
The 85-cm telescope at Xinglong station is a prime focus system that operates well with high science outputs. The telescope has been upgraded since 2014 with a new corrector, and new filters and camera, which are provided by Beijing Normal…