Search Publications
Detection of gamma-ray transients with wild binary segmentation
Antier, S.; Barynova, K.; Fryzlewicz, P. +2 more
In the context of time domain astronomy, we present an offline detection search of gamma-ray transients using a wild binary segmentation analysis called F-WBSB targeting both short and long gamma-ray bursts (GRBs) and covering the soft and hard gamma-ray bands. We use NASA Fermi/GBM archival data as a training and testing data set. This paper desc…
Spectroscopic orbit determination of the long periodic binary system θ Cep
Mugrauer, Markus; Lux, Oliver; Bischoff, Richard +4 more
In 2015, a radial velocity monitoring campaign was started in order to redetermine and/or constrain the orbital solutions of spectroscopic binary systems. The observations were carried out at the University Observatory Jena with the Échelle spectrograph FLECHAS. The results from the main part of our target sample are already published. For the fin…
SOFIA/FORCAST Observations of R Aqr: Monitoring the Dust Emission
Gorti, Uma; Wagner, R. Mark; Sankrit, Ravi +2 more
We present mid-infrared spectra of the symbiotic Mira, R Aqr obtained with the Faint Object infraRed CAmera instrument on the Stratospheric Observatory for Infrared Astronomy in 2016 and 2017. These data, supplemented with Infrared Space Observatory observations from 20 yr earlier, allow us to study the variation of the silicate dust emission over…
Deep Learning for 3d Reconstruction of the Martian Surface Using Monocular Images: a First Glance
Chen, Z.; Wu, B.; Liu, W. C.
The paper presents our efforts on CNN-based 3D reconstruction of the Martian surface using monocular images. The Viking colorized global mosaic and Mar Express HRSC blended DEM are used as training data. An encoder-decoder network system is employed in the framework. The encoder section extracts features from the images, which includes convolution…
Theoretical studies of comets in the 55 Cancri system
Cuntz, Manfred; Dvorak, Rudolf; Loibnegger, Birgit
We present orbital integrations for various Jupiter family comets (JFCs) in the 55 Cancri system. This star is known to possess (at least) five planets with masses ranging from super-Earth to Jupiter-type. Furthermore, according to observational constraints, there is a space without planets between ∼0.8 and ∼5.7 au, offering the principal possibil…
The most evolved sources in the Hi-GAL survey
Elia, D.
Far-infrared and submillimetre surveys as the Herschel Galactic Plane Infrared Survey (Hi-GAL) represent an irreplaceable knowledge base about early phases of star formation, permitting statistical analysis based on thousands of Galaxy-wide distributed sources. Those with a regular spectral energy distribution in the Herschel wavelength range 70-5…
The Distribution Function of the Average Iron Charge State at 1 AU: From a Bimodal Wind to ICME Identification
Cid, C.; Larrodera, C.
We aim to investigate the distribution function of the iron charge state, at 1 AU to check if it corresponds to a bimodal wind. We use data from the Solar Wind Ion Composition Spectrometer (SWICS) instrument on board the Advanced Composition Explorer (ACE) along 20 years. We propose the bi-Gaussian function as the probability distribution function…
A search for variable stars in the four open star clusters
Bisht, D.; Rangwal, Geeta; Yadav, R. K. S. +3 more
We present a CCD photometric survey for the search of variable stars in four open clusters namely Berkeley 69, King 5, King 7 and Berkeley 20. The time series observations were carried out for 1 and/or 2 nights for each of the clusters in the year 1998, which have led to identify nineteen variable stars in these clusters. Out of these 19 variable …
Variability and transient search in the SUDARE-VOICE field: a new method to extract the light curves
Pignata, Giuliano; Vaccari, Mattia; Paolillo, Maurizio +12 more
The VLT Survey Telescope (VST) Optical Imaging of the CDFS and ES1 Fields Survey, in synergy with the SUDARE survey, is a deep optical ugri imaging of the CDFS and ES1 fields using the VST. The observations for the CDFS field comprise about 4.38 deg2 down to r ∼ 26 mag. The total on-sky time spans over 4 yr in this field, distributed ov…
On Making Magnetic-flux-rope Ω Loops for Solar Bipolar Magnetic Regions of All Sizes by Convection Cells
Tiwari, Sanjiv K.; Panesar, Navdeep K.; Moore, Ronald L. +1 more
We propose that the flux-rope Ω loop that emerges to become any bipolar magnetic region (BMR) is made by a convection cell of the Ω-loop's size from initially horizontal magnetic field ingested through the cell's bottom. This idea is based on (1) observed characteristics of BMRs of all spans (∼1000 to ∼200,000 km), (2) a well-known simulation of t…