Results 21 to 30 of about 22,056 (167)

Array Polarimetry and Optical-Differencing Photometry [PDF]

Symposium - International Astronomical Union, 1995
Array detectors have improved the efficiency of optical polarimetry sufficiently for this technique to become part of the standard arsenal of observational facilities. However, we could gain even more: spatially-differentiating photometry can be implemented as an option of array Polarimeters and low-noise, high-frame-rate array detectors will allow ...
openaire   +2 more sources

Optical Photometry of Black-Hole Candidates [PDF]

Symposium - International Astronomical Union, 1996
The orbital light curves of SXTs are discussed. In principle, the orbital inclination can be determined from the ellipsoidal variations, allowing a complete solution for the component masses. Complications in this analysis are described, and the evidence for superhumps in the light curves is reviewed.
openaire   +2 more sources

bRing: An observatory dedicated to monitoring the $\beta$ Pictoris b Hill sphere transit [PDF]

, 2017
Aims. We describe the design and first light observations from the $\beta$ Pictoris b Ring ("bRing") project. The primary goal is to detect photometric variability from the young star $\beta$ Pictoris due to circumplanetary material surrounding the ...
Bailey III, J. I., Crawford, S. M., Dorval, P., Ireland, M. J., Kenworthy, M. A., Laginja, I., Lomberg, B. B. D., Mamajek, E. E., Mellon, S. N., Stuik, R., Talens, G. J. J.   +10 more
core   +3 more sources

Optical polarimetry and photometry of comet 17P/Holmes [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
11pages, 7 figures, accepted for publication in ...
U. C. Joshi, Kiran S. Baliyan, Shashikiran Ganesh   +2 more
openaire   +4 more sources

Optical photometry and polarimetry and infrared photometry of 3C 345 in outburst

The Astrophysical Journal, 1993
We present V-band CCD photometry, UBVRI photopolarimetry, and near simultaneous JHK photometry of 3C 345 during a renewed outburst in spring of 1992, which reached maximum at the end of April. The observations also show a large and variable polarization.
Masami Okyudo, Mark R. Kidger, José A. de Diego, A. Sillanpää, Leo O. Takalo   +4 more
openaire   +2 more sources

Optical spectroscopy and photometry of SAX J1808.4−3658 in outburst [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808.4-3658, obtained during the 2008 September/October outburst. Doppler tomography of the N III 4640.64 Bowen blend emission line reveals a focused spot of emission at a location consistent with ...
Mark Reynolds, Daniel Jason Hurley, Fraser Lewis, Fraser Lewis, Fraser Lewis, P. Elebert, D. M. Russell, Pasi Hakala, Brian Nord, Stephen R. Kane, Darren L. DePoy, Paul J. Callanan, Gavin Ramsay   +12 more
openaire   +7 more sources

The absolute age of the globular cluster M15 using near-infrared adaptive optics images from PISCES/LBT [PDF]

, 2015
We present deep near-infrared (NIR) J, Ks photometry of the old, metal-poor Galactic globular cluster M\,15 obtained with images collected with the LUCI1 and PISCES cameras available at the Large Binocular Telescope (LBT).
Arcidiacono, C., Bono, G., Boutsia, K., Briguglio, R., Busoni, L., Carini, R., Close, L., Cresci, G., Esposito, S., Ferraro, I., Fini, L., Fiorentino, G., Fumana, M., Guerra, J. C., Hill, J., Iannicola, G., Kulesa, C., Mannucci, F., Massari, D., McCarthy, D., Monelli, M., Pinna, E., Puglisi, A., Quiros-Pacheco, F., Ragazzoni, R., Riccardi, A., Skemer, A., Testa, V., Xompero, M.   +28 more
core   +3 more sources

Optical photometry and spectroscopy of the 1987A-like supernova 2009mw [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We present optical photometric and spectroscopic observations of the 1987A-like supernova (SN) 2009mw. Our $BVRI$ and $g'r'i'z'$ photometry covers 167 days of evolution, including the rise to the light curve maximum, and ends just after the beginning of the linear tail phase.
Aaron P. LaCluyze, J. P. Moore, K. Takats, Maximilian Stritzinger, M. L. Rojas Kaufmann, Joseph P. Anderson, Gastón Folatelli, Gastón Folatelli, Mario Hamuy, Mario Hamuy, Daniel E. Reichart, Melina C. Bersten, Melina C. Bersten, J. B. Haislip, Giuliano Pignata   +14 more
openaire   +9 more sources

MAD@VLT: Deep into the Madding Crowd of Omega Centauri

, 2008
We present deep and accurate Near-Infrared (NIR) photometry of the Galactic Globular Cluster (GC) Omega Cen. Data were collected using the Multi-Conjugate Adaptive Optics Demonstrator (MAD) on VLT (ESO).
A. M., Amico P., Bono G., Buonanno R., Calamida A., Caputo F., Corsi C. E., D'Odorico S., D., Dall'Ora M., DEGL'INNOCENTI S, Ferraro I., Freyhamme, Iannicola G., Koeste, L. M., Marchetti E., Monelli M., Nonino M., P. G., Piersimon, Prada Moron, Pulone L., Romaniello M., Stetson P. B.   +24 more
core   +1 more source

Towards Precision Photometry with Extremely Large Telescopes: the Double Subgiant Branch of NGC 1851 [PDF]

, 2015
The Extremely Large Telescopes currently under construction have a collecting area that is an order of magnitude larger than the present largest optical telescopes.
Andersen, D. R., Bono, G., Fiorentino, G., McConnachie, A. W., Stetson, P. B., Turri, P., Véran, J. -P.   +6 more
core   +2 more sources