- Astrophysically robust systematics removal using variational inference: application to the first month of Kepler data
- Roberts, S.; McQuillan, A.; Reece, S.; Aigrain, S.
Space-based transit search missions such as Kepler are collecting large numbers of stellar light curves of unprecedented photometric precision and time coverage. However, before this scientific goldmine can be exploited fully, the data must be clean …
- Improving three-dimensional mass mapping with weak gravitational lensing using galaxy clustering
- Simon, Patrick
Context. The weak gravitational lensing distortion of distant galaxy images (defined as sources) probes the projected large-scale matter distribution in the Universe. The availability of redshift information in galaxy surveys also allows us to recov …
- Denoising spectroscopic data by means of the improved least-squares deconvolution method
- Tkachenko, A.; Van Reeth, T.; Tsymbal, V.; Aerts, C.; Kochukhov, O.; Debosscher, J.
Context. The MOST, CoRoT, and Kepler space missions have led to the discovery of a large number of intriguing, and in some cases unique, objects among which are pulsating stars, stars hosting exoplanets, binaries, etc. Although the space missions ha …
- A multi-scale filament extraction method: getfilaments
- Men’shchikov, A.
Far-infrared imaging surveys of Galactic star-forming regions with Herschel have shown that a substantial part of the cold interstellar medium appears as a fascinating web of omnipresent filamentary structures. This highly anisotropic ingredient of …
- Searching for transits in the Wide Field Camera Transit Survey with difference-imaging light curves
- Zendejas Dominguez, J.; Koppenhoefer, J.; Saglia, R. P.; Birkby, J. L.; Hodgkin, S. T.; Kovács, G.; Pinfield, D. J.; Sipőcz, B.; Barrado, D.; Bender, R.; del Burgo, C.; Cappetta, M.; Martín, E. L.; Nefs, S. V.; Riffeser, A.; Steele, P.
The Wide Field Camera Transit Survey is a pioneer program aiming at for searching extra-solar planets in the near-infrared. The images from the survey are processed by a data reduction pipeline, which uses aperture photometry to construct the light …
- Detecting cosmic rays with the LOFAR radio telescope
- Schellart, P.; Nelles, A.; Buitink, S.; Corstanje, A.; Enriquez, J. E.; Falcke, H.; Frieswijk, W.; Hörandel, J. R.; Horneffer, A.; James, C. W.; Krause, M.; Mevius, M.; Scholten, O.; ter Veen, S.; Thoudam, S.; van den Akker, M.; Alexov, A.; Anderson, J.; Avruch, I. M.; Bähren, L.; Beck, R.; Bell, M. E.; Bennema, P.; Bentum, M. J.; Bernardi, G.; Best, P.; Bregman, J.; Breitling, F.; Brentjens, M.; Broderick, J.; Brüggen, M.; Ciardi, B.; Coolen, A.; de Gasperin, F.; de Geus, E.; de Jong, A.; de Vos, M.; Duscha, S.; Eislöffel, J.; Fallows, R. A.; Ferrari, C.; Garrett, M. A.; Grießmeier, J.; Grit, T.; Hamaker, J. P.; Hassall, T. E.; Heald, G.; Hessels, J. W. T.; Hoeft, M.; Holties, H. A.; Iacobelli, M.; Juette, E.; Karastergiou, A.; Klijn, W.; Kohler, J.; Kondratiev, V. I.; Kramer, M.; Kuniyoshi, M.; Kuper, G.; Maat, P.; Macario, G.; Mann, G.; Markoff, S.; McKay-Bukowski, D.; McKean, J. P.; Miller-Jones, J. C. A.; Mol, J. D.; Mulcahy, D. D.; Munk, H.; Nijboer, R.; Norden, M. J.; Orru, E.; Overeem, R.; Paas, H.; Pandey-Pommier, M.; Pizzo, R.; Polatidis, A. G.; Renting, A.; Romein, J. W.; Röttgering, H.; Schoenmakers, A.; Schwarz, D.; Sluman, J.; Smirnov, O.; Sobey, C.; Stappers, B. W.; Steinmetz, M.; Swinbank, J.; Tang, Y.; Tasse, C.; Toribio, C.; van Leeuwen, J.; van Nieuwpoort, R.; van Weeren, R. J.; Vermaas, N.; Vermeulen, R.; Vocks, C.; Vogt, C.; Wijers, R. A. M. J.; Wijnholds, S. J.; Wise, M. W.; Wucknitz, O.; Yatawatta, S.; Zarka, P.; Zensus, A.
The low frequency array (LOFAR), is the first radio telescope designed with the capability to measure radio emission from cosmic-ray induced air showers in parallel with interferometric observations. In the first ~2 years of observing, 405 cosmic-ra …
- The Gemini NICI Planet-Finding Campaign: The Companion Detection Pipeline
- Wahhaj, Zahed; Liu, Michael C.; Biller, Beth A.; Nielsen, Eric L.; Close, Laird M.; Hayward, Thomas L.; Hartung, Markus; Chun, Mark; Ftaclas, Christ; Toomey, Douglas W.
We present high-contrast image processing techniques used by the Gemini NICI Planet-Finding Campaign to detect faint companions to bright stars. The Near-Infrared Coronographic Imager (NICI) is an adaptive optics instrument installed on the 8 m Gemi …
- The MYStIX Wide-field Near-infrared Data: Optimal Photometry in Crowded Fields
- King, R. R.; Naylor, Tim; Broos, Patrick S.; Getman, Konstantin V.; Feigelson, Eric D.
We present JHK infrared data from the UK InfraRed Telescope (UKIRT) for a subset of the regions of the Massive Young Star-Forming Complex Study in Infrared and X-ray (MYStIX) survey. Some of the data were obtained specifically for the MYStIX project …
- Bayesian Matching for X-Ray and Infrared Sources in the MYStIX Project
- Naylor, Tim; Broos, Patrick S.; Feigelson, Eric D.
Identifying the infrared counterparts of X-ray sources in Galactic plane fields such as those of the MYStIX project presents particular difficulties due to the high density of infrared sources. This high stellar density makes it inevitable that a la …
- MOSE: operational forecast of the optical turbulence and atmospheric parameters at European Southern Observatory ground-based sites – II. Atmospheric parameters in the surface layer 0-30 m
- Lascaux, F.; Masciadri, E.; Fini, L.
This paper is the second of a series in which we aim to prove the feasibility of forecasting all the most relevant classical atmospheric parameters for astronomical applications (wind speed, wind direction, temperature, relative humidity) and the op …
- The busy function: a new analytic function for describing the integrated 21-cm spectral profile of galaxies
- Westmeier, T.; Jurek, R.; Obreschkow, D.; Koribalski, B. S.; Staveley-Smith, L.
Accurate parametrization of galaxies detected in the 21-cm H I emission is of fundamental importance to the measurement of commonly used indicators of galaxy evolution, including the Tully-Fisher relation and the H I mass function. Here, we propose …
- Fitting density models to observational data. The local Schmidt law in molecular clouds
- Lombardi, Marco; Lada, Charles J.; Alves, João
We consider the general problem of fitting a parametric density model to discrete observations, taken to follow a non-homogeneous Poisson point process. This class of models is very common, and can be used to describe many astrophysical processes, i …
- Likelihood of the Power Spectrum in Cosmological Parameter Estimation
- Sun, Lei; Wang, Qiao; Zhan, Hu
The likelihood function is a crucial element of parameter estimation. In analyses of galaxy overdensities and weak lensing shear, one often approximates the likelihood of the power spectrum with a Gaussian distribution. The posterior probability der …
- Grid-based Exploration of Cosmological Parameter Space with Snake
- Mikkelsen, K.; Næss, S. K.; Eriksen, H. K.
We present a fully parallelized grid-based parameter estimation algorithm for investigating multidimensional likelihoods called Snake, and apply it to cosmological parameter estimation. The basic idea is to map out the likelihood grid-cell by grid-c …
- The Neutron Star Mass Distribution
- Kiziltan, Bülent; Kottas, Athanasios; De Yoreo, Maria; Thorsett, Stephen E.
In recent years, the number of pulsars with secure mass measurements has increased to a level that allows us to probe the underlying neutron star (NS) mass distribution in detail. We critically review the radio pulsar mass measurements. For the firs …
- A transdimensional Bayesian method to infer the star formation history of resolved stellar populations
- Walmswell, J. J.; Eldridge, J. J.; Brewer, B. J.; Tout, C. A.
We propose a new method to infer the star formation histories of resolved stellar populations. With photometry one may plot observed stars on a colour-magnitude diagram (CMD) and then compare with synthetic CMDs representing different star formation …
- The biphase explained: understanding the asymmetries in coupled Fourier components of astronomical time series
- Maccarone, Thomas J.
We make the first attempt to estimate and interpret the biphase data for astronomical time series. The biphase is the phase of the bispectrum, which is the Fourier domain equivalent of the three-point correlation function. The bispectrum measures tw …
- Optimizing the recovery of Fisher information in the dark matter power spectrum
- Harnois-Déraps, Joachim; Yu, Hao-Ran; Zhang, Tong-Jie; Pen, Ue-Li
We examine and combine different techniques that are known to increase the Fisher information content about the amplitude of the matter power spectrum, and propagate their impact on a baryonic acoustic oscillation (BAO) measurement. We compare a den …
- Classifying Supernovae Using Only Galaxy Data
- Foley, Ryan J.; Mandel, Kaisey
We present a new method for probabilistically classifying supernovae (SNe) without using SN spectral or photometric data. Unlike all previous studies to classify SNe without spectra, this technique does not use any SN photometry. Instead, the method …
- A Robust Quantification of Galaxy Cluster Morphology Using Asymmetry and Central Concentration
- Nurgaliev, D.; McDonald, M.; Benson, B. A.; Miller, E. D.; Stubbs, C. W.; Vikhlinin, A.
We present a novel quantitative scheme of cluster classification based on the morphological properties that are manifested in X-ray images. We use a conventional radial surface brightness concentration parameter (c SB) as defined previously by other …