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Photometric and kinematic studies of open cluster NGC 1027
Sharma, Saurabh; Panwar, Neelam; Kumar, Brijesh +2 more
We present photometric and kinematic analyses of an intermediate-age open cluster NGC 1027 using
Spectral and timing analysis of BeXRB eRASSU J050810.4-660653 recently discovered in the Large Magellanic Cloud (LMC)
Tobrej, Mohammed; Rai, Binay; Ghising, Manoj +2 more
We have studied the Be/X-ray binary (BeXRB) pulsar eRASSU J050810.4-660653 recently discovered in the Large Magellanic Cloud (LMC). Timing and spectral features of the source have been discussed in detail using NuSTAR and XMM-Newton observations. Coherent pulsation of the source was detected at ~40.578 ± 0.001 s using NuSTAR observation. We analys…
Parameters of SU UMa and WZ Sge-Type Dwarf Novae in Quiescent State. I. FL Psc, TY Psc and V455 And
Shimansky, V. V.; Mitrofanova, A. A.; Dudnik, A. A. +2 more
We present the results of model analysis of the optical spectra of SU UMa and WZ Sge-type dwarf novae TY Psc, FL Psc, and V455 And. Spectroscopic observations were carried out at the SAO RAS 6-m BTA telescope in 2013. The selection criterion for the systems under study is their existence in a quiescent state with an optically thin accretion disk a…
LAMOST J2043+3413-a Fast Disk Precession SW Sextans Candidate in Period Gap
Wang, Xiaofeng; Liu, Jiren; Sun, Yongkang +5 more
We present follow-up photometric observations and time-series analysis of a nova-like, SW Sextans-type, cataclysmic variable (CV) candidate, LAMOST J204305.95+341340.6 (hereafter J2043+3413), with a Gaia G-band magnitude of 15.30 and a distance of 990 pc, which was identified from the LAMOST spectrum. The photometric data were collected with the T…
Photometric long-term variations of dwarf novae during quiescence
Vogt, N.; Vega-Manubens, I.
Using the Catalina Sky Survey and Gaia alert data bases, we have carried out a systematic search for long-term variability of the brightness of dwarf novae in quiescence. A small, but significant portion of them revealed variability on time-scales between 2 and 14 yr which can be fitted, in some of the targets, by linear slopes of 0.14 mag yr…
The radiometric environment for Mars limb observations by the Mars Sample Return Earth Return Orbiter
Montmessin, Franck; Titov, Dmitri; Wolff, Michael J. +17 more
After launching from the martian surface via the Mars Ascent Vehicle (MAV), the MAV and the Orbiting Sample (OS) capsule containing the samples collected on Mars by the Perseverance rover are to be identified by the Narrow Angle Camera (NAC) on the Earth Return Orbiter (ERO) spacecraft in order to determine the exact orbit of the capsule before re…
Data processing pipeline for multiple-exposure photo-plate digital archives
Yu, Yong; Jia, Peng; Yang, Zhimin +2 more
Photo-plates are an invaluable historical legacy that have been used for over a hundred years to capture images of celestial objects. By digitizing these photo-plates and processing the images with digital image processing methods, scientists can study celestial objects that exhibit temporal variations. Multiple-exposure photo-plates are a unique …
ALMA Observations of the Extraordinary Carina Pillars: A Complementary Sample
Reiter, Megan; Zapata, Luis A.; Takahashi, Satoko +3 more
We present a study of six dusty and gaseous pillars (containing the Herbig-Haro (HH) objects HH 1004 and HH 1010) and globules (that contain the HH 666, HH 900, HH 1006, and HH 1066 objects) localized in the Carina Nebula using sensitive and high-angular-resolution (~0.″3) Atacama Large Millimeter/submillimeter Array observations. This is a more e…
Spectrally dispersed kernel phase interferometry with SCExAO/CHARIS: proof of concept and calibration strategies
Martinache, Frantz; Chaushev, Alexander; Sallum, Steph +7 more
Kernel phase interferometry (KPI) is a data processing technique that allows for the detection of asymmetries (such as companions or disks) in high-Strehl images, close to and within the classical diffraction limit. We show that KPI can successfully be applied to hyperspectral image cubes generated from integral field spectrographs (IFSs). We demo…
Unravelling optical and X-ray properties of the disc-dominated intermediate polar IGR J15094-6649
Pandey, J. C.; Scaringi, Simone; Schwope, Axel +5 more
We present analyses of an Intermediate Polar, IGR J15094-6649, based on the archival optical data obtained from the Transiting Exoplanet Survey Satellite (TESS) and X-ray data obtained from the Suzaku, NuSTAR, and Neil Gehrels Swift Observatory (Swift). Present analysis confirms and refines the previously reported spin period of IGR J15094-6649 as…