Limits on momentum-dependent asymmetric dark matter with CRESST-II [Replacement]
The usual assumption in direct dark matter searches is to only consider the spin-dependent or spin-independent scattering of dark matter particles. However, especially in models with light dark matter...
View ArticleDisk Detective: Discovery of New Circumstellar Disk Candidates through...
The Disk Detective citizen science project aims to find new stars with 22 micron excess emission from circumstellar dust using data from NASA's WISE mission. Initial cuts on the AllWISE catalog provide...
View ArticleDetectors and cooling technology for direct spectroscopic biosignature...
Direct spectroscopic biosignature characterization (hereafter "biosignature characterization") will be a major focus for future space observatories equipped with coronagraphs or starshades. Our aim in...
View ArticleCustom Chipset and Compact Module Design for a 75-110 GHz Laboratory Signal...
We report on the development and characterization of a compact, full-waveguide bandwidth (WR-10) signal source for general-purpose testing of mm-wave components. The MMIC-based multichip module is...
View ArticleA comprehensive radial velocity error budget for next generation Doppler...
We describe a detailed radial velocity error budget for the NASA-NSF Extreme Precision Doppler Spectrometer instrument concept NEID (NN-explore Exoplanet Investigations with Doppler spectroscopy). Such...
View ArticleIncreasing the sensitivity of a Shack-Hartmann sensor
The Max-Planck institutes for astronomy (MPIA) and for extraterrestrial physics (MPE) run an adaptive optics (AO) system with a laser guide star at the 3.5 m telescope on Calar Alto, Spain. This...
View ArticleThe QACITS pointing sensor: from theory to on-sky operation on Keck/NIRC2
Small inner working angle coronagraphs are essential to benefit from the full potential of large and future extremely large ground-based telescopes, especially in the context of the detection and...
View ArticleMonte Carlo simulations of soft proton flares: testing the physics with...
Low energy protons (<100-300 keV) in the Van Allen belt and the outer regions can enter the field of view of X-ray focusing telescopes, interact with the Wolter-I optics, and reach the focal plane....
View ArticleInference of Unresolved Point Sources At High Galactic Latitudes Using...
We construct a Bayesian framework to perform inference of dim or overlapping point sources. The method involves probabilistic cataloging, where samples are taken from the posterior probability...
View ArticleSlitless spectroscopy with the James Webb Space Telescope Near-Infrared...
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 $R \sim 1500$...
View ArticleMonte Carlo radiation transfer simulations of photospheric emission in...
We present MCRaT, a Monte Carlo Radiation Transfer code for self-consistently computing the light curves and spectra of the photospheric emission from relativistic, unmagnetized jets. We apply MCRaT to...
View ArticleReadout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol
Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale...
View ArticleModelling multimodal photometric redshift regression with noisy observations
In this work, we are trying to extent the existing photometric redshift regression models from modeling pure photometric data back to the spectra themselves. To that end, we developed a PCA that is...
View ArticleOn the estimation of stellar parameters with uncertainty prediction from...
Aims. We present an innovative artificial neural network (ANN) architecture, called Generative ANN (GANN), that computes the forward model, that is it learns the function that relates the unknown...
View ArticleCharacterization of very narrow spectral lines with temporal intensity...
Context: Some stellar objects exhibit very narrow spectral lines in the visible range additional to their blackbody radiation. Natural lasing has been suggested as a mechanism to explain narrow lines...
View ArticleStatistical survey and analysis of photometric and spectroscopic data on NEAS
Studies on Near Earth Asteroids (NEAs) throw light on discoveries, identification, orbit prediction and civil alert capabilities, including potential asteroid impact hazards. Due to various new...
View ArticleThe SLUGGS survey: a new mask design to reconstructing the stellar population...
Integral field unit spectrographs allow the 2D exploration of the kinematics and stellar populations of galaxies, although they are generally restricted to small fields-of-view. Using the large...
View ArticleUpper limits to the number of Oort Cloud Objects based on serendipitous...
Using all the RXTE archival data of Sco X-1 and GX 5-1, which amount to about 1.6 mega seconds in total, we searched for possible occultation events caused by Oort Cloud Objects. The detection...
View ArticleZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance...
We describe the Zonal Atmospheric Stellar Parameters Estimator (ZASPE), a new algorithm, and its associated code, for determining precise stellar atmospheric parameters and their uncertainties from...
View ArticleLow frequency observations of linearly polarized structures in the...
We present deep polarimetric observations at 154 MHz with the Murchison Widefield Array (MWA), covering 625 deg^2 centered on RA=0 h, Dec=-27 deg. The sensitivity available in our deep observations...
View Article