<i>pt5m</i>– a 0.5 m robotic telescope on La Palma

Hardy, L. K.; Butterley, T.; Dhillon, V. S.; Littlefair, S. P.; Wilson, Richard W.

doi:10.1093/mnras/stv2279

Cited by 45 publications

(24 citation statements)

References 33 publications

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“…Although not likely to be eclipsing due to it being a relatively face-on system, we observed CSS140402:173048+554518 during outburst with automated follow-up from the initial CRTS transient trigger (Hardy et al 2015). A 1.3 h light curve is shown in Fig.…”

Section: Css140402:173048+554518mentioning

confidence: 76%

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Hunting for eclipses: high-speed observations of cataclysmic variables

Hardy

McAllister

Dhillon

et al. 2016

Mon. Not. R. Astron. Soc.

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Section: Css140402:173048+554518mentioning

confidence: 76%

“…For newly discovered CVs, initial observations were made with pt5m, a 0.5 m telescope located at the Roque de los Muchachos Observatory on La Palma (Hardy et al 2015). The telescope is robotic and sits on the roof of the control-room building of the 4.2 m William Herschel Telescope (WHT).…”

Section: O B S E Rvat I O N Smentioning

confidence: 99%

Hunting for eclipses: high-speed observations of cataclysmic variables

Hardy

McAllister

Dhillon

et al. 2016

Mon. Not. R. Astron. Soc.

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“…Finally, we also observed some candidates with the robotic telescope pt5m (Universities of Durham and Sheffield; Hardy et al 2015). pt5m reduces images and uploads results online in real time, and was very helpful with our photometric scans of candidates.…”

Section: Observational Strategymentioning

confidence: 97%

A systematic study of spiral density waves in the accretion discs of cataclysmic variables

Ruiz-Carmona

Groot

Steeghs

2019

Monthly Notices of the Royal Astronomical Society

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Spiral density waves are thought to be excited in the accretion discs of accreting compact objects, including Cataclysmic Variable stars (CVs). Observational evidence has been obtained for a handful of systems in outburst over the last two decades. We present the results of a systematic study searching for spiral density waves in CVs, and report their detection in two of the sixteen observed systems. While most of the systems observed present asymmetric, non-Keplerian accretion discs during outburst, the presence of ordered structures interpreted as spiral density waves is not as ubiquitous as previously anticipated. From a comparison of systems by their system parameters it appears that inclination of the systems may play a major role, favouring the visibility and/or detection of spiral waves in systems seen at high inclination.

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“…Optical, infrared, radio, X-ray and gamma-ray telescopes have so far collected an impressive amount of data that will emerge in the scientific literature in the upcoming months. But the extraordinary thing was that even small optical telescopes could join this endeavor since V404 Cygni became a bright and highly variable source at visible wavelengths Hardy et al 2015;Wiersema 2015;.…”

Section: Introductionmentioning

confidence: 99%

Multi-colour optical photometry of V404 Cygni in outburst

Martı́

Luque-Escamilla

García-Hernández

2016

A&A

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Context. This observational paper has been prepared in the context of the large multi-wavelength effort by many observers with the aim of following up the transient flaring event of V404 Cygni that took place for several weeks in 2015 June. Aims. Our main original aim was to contribute to the study of this transient source by acquiring broad-band photometric observations during its most active flaring phases. Nevertheless, after a detailed analysis of the data, several interesting results were obtained that encouraged a dedicated publication. Methods. The methodology used was based on broad-band differential CCD photometry. This outburst of V404 Cygni rendered the source a very bright target easily within reach of small educational telescopes. Therefore, the 41 cm telescope available at the Astronomical Observatory of the University of Jaén was used in this work. Results. We detected variability at different time scales, both in amplitude and colour. Individual optical flares appear every half hour on average during our 3 h long observation, although large-amplitude (∼1 mag) variations are also observed to occur on intervals as short as 10 min. Also, colour variations appear to be highly correlated in a colour-colour diagram. Another remarkable finding is the detection of time lag, from about one to a fraction of a minute between light curves in different filters (VR c I c ).Conclusions. The observed behaviour is tentatively interpreted in an scenario based on the ejection of non-thermal emitting, relativistic plasmons, with their synchrotron spectra extending up to optical wavelengths. This would render some of the V404 Cygni flares very similar to those of the well-know microquasar GRS 1915+105

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pt5m– a 0.5 m robotic telescope on La Palma

Cited by 45 publications

References 33 publications

Hunting for eclipses: high-speed observations of cataclysmic variables

Hunting for eclipses: high-speed observations of cataclysmic variables

A systematic study of spiral density waves in the accretion discs of cataclysmic variables

Multi-colour optical photometry of V404 Cygni in outburst

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