Based on my reading, I've always thought that guiding was not that critical for differential photometry. (aavso.org)
Photometric7
We quantitatively show for the first time that this incoherence, in turn, increases the robustness and stability of the adaptive speckles, which will improve the precision of astrometric and photometric calibration procedures. (caltech.edu)
Current projects include studying the time variability of various types of binary stars using both spectroscopy and photometry, as well as photometric studies of nebula in the search for emissions caused by polycyclic aromatic hydrocarbons. (clarkson.edu)
The ratiometric method is a refinement of photometry designed to overcome the accuracy limitations of traditional single-dye photometric volume measurements by employing two standardized dyes and absorbance readings in pairs that can be combined into absorbance ratio readings. (aicompanies.com)
This leads to a higher degree of accuracy and precision in ratiometric methods versus traditional single-dye photometric methods. (aicompanies.com)
From 278 F dwarfs with high precision photometry in all indices, a mean reddening of E(b - y) = 0.117 ± 0.005 or E(B - V) = 0.160 ± 0.007 is derived, where the standard errors of the mean include both internal errors and the photometric zero-point uncertainty. (ku.edu)
A comparison of the results obtained from the TESS and CHEOPS light curves indicates that for a V - 9 mag solar-like star and a transit signal of -500 ppm, one CHEOPS transit light curve ensures the same level of photometric precision as eight TESS transits combined, although this conclusion depends on the length and position of the gaps in the light curve. (lu.se)
Photometry, photometric systems and photometric reduction methods. (lu.se)
Spectroscopy1
Photometry and low resolution spectroscopy with Twinkle will be useful to refine planetary, stellar and orbital parameters, monitor stellar activity through time and search for transit time and duration variations (TTVs and TDVs). (springer.com)
Kepler4
The NASA space mission Kepler is providing continuous high-precision photometry of thousands of stars. (europa.eu)
Because of their unprecedented precision, the Kepler data act as a precious source of information for various astrophysical studies, particularly asteroseismology, which is a rapidly growing field allowing to study the interiors of stars by measuring their oscillations in a way analogous to that used by geologists who study the interior of the Earth by means of seismic methods. (europa.eu)
While lcps is adaptable to any format of time series, its I/O module is designed specifically for photometry of the Kepler spacecraft. (ascl.net)
Each observing campaign lasts approximately 80 days, during which high-precision optical photometry of select astrophysical targets is collected by the Kepler spacecraft. (arxiv.org)
CHEOPS5
With the recent launch of the Transiting Exoplanet Survey Satellite (TESS), CHEOPS may also be able to confirm some of the long-period TESS candidates and to improve the radii precision of confirmed exoplanets. (aanda.org)
The high-precision photometry of CHEOPS relies on careful on-ground calibration of its payload. (aanda.org)
Using our end-to-end simulation, we determine that measurements of planet-to-star radii ratio with a precision of 2% for a Neptune-size planet transiting a K-dwarf star and 5% for an Earth-size planet orbiting a Sun-like star are possible with CHEOPS. (aanda.org)
CHEOPS - CHaracterising ExOPlanet Satellite - is the first mission dedicated to searching for exoplanetary transits by performing ultra-high precision photometry on bright stars already known to host planets. (esa.int)
We perform a first characterisation of the HD 108236 planetary system through high-precision CHEOPS photometry and improve the transit ephemerides and system parameters. (lu.se)
TESS2
We performed an extensive analysis of the HARPS and ESPRESSO datasets and also analyzed them together with the new TESS photometry. (aanda.org)
These values are in agreement with previous TESS-based estimates, but with an improved precision of about a factor of two. (lu.se)
Transits2
Exoplanet detection using planetary transits requires very high precision photometry. (mit.edu)
In addition to contributing to theories of stellar structure, stellar dynamics and evolution, Benard Nsamba's project will also play a significant role in the ongoing preparation activities concerning the precision and accuracy of exoplanet-host star characterisation for ESA's PLATO (PLAnetary Transits and Oscillations of stars) mission. (mpg.de)
Exoplanets2
Detection of transiting exoplanets requires high precision photometry, at the percent level for giant planets and at the 1e-5 level for detection of Earth-like rocky planets. (arizona.edu)
The characterisation of Earth-size exoplanets through transit photometry has stimulated new generations of high-precision instruments. (aanda.org)
Spectroscopic2
With the help of published spectroscopic measurements and theoretical stellar models, we determine the physical properties of the system to high precision and present a detailed error budget for these calculations. (blogspot.com)
Matching stellar observables to stellar evolution models will require skills in photometry/asteroseismic data analysis, spectroscopic analysis, as well as stellar modelling. (mpg.de)
Astrometry1
1) To reveal the Milky Way's central core structure and formation history by measuring the distances and the motions of the stars located as far as 26 thousand light-years away with high-precision astrometry observations in the near-infrared band. (scholarpedia.org)
Planetary1
Using an end-to end model, we simulated transit observations to evaluate the impact of in-orbit behaviour of the satellite and to determine the achievable precision on the planetary radii measurement. (aanda.org)
Detection1
Additionally, analytical methods are included that modify previously used methods to obtain lower detection limits and/or to improve accuracy and precision. (cdc.gov)
0.0101
The mosaic of CCD fields covers an area ~42' on a side with internal precision at the 0.005 to 0.010 mag level for the majority of stars down to V~15. (arxiv.org)
Photon noise2
We demonstrate that a newly developed data reduction algorithm can overcome detector sampling and color issues, and allow precision photometry with these systems, approaching the limit set by photon noise and scintillation noise - which can both average as the inverse square root of etendue. (arizona.edu)
We collected 113 new high-precision radial velocity observations with ESPRESSO over a 1.5-yr time span with an average photon-noise precision of 1.07 m s −1 . (aanda.org)
We use these to establish a high-precision reference epoch for transit timing studies. (blogspot.com)
Space provides an ideally stable - but costly - environment for high precision photometry. (arizona.edu)
Achieving high precision photometry on a large number of sources from the ground is scientifically valuable, but also very challenging, due to multiple sources of errors. (arizona.edu)
The acquisition and guiding camera, equipped with a filter wheel, lends itself also to some science grade imaging and moderate high speed photometry. (eso.org)
This discovery demonstrates that EMCCDs are a powerful tool for performing high-precision time-series photometry in crowded fields and near bright stars, especially when combined with difference image analysis. (caltech.edu)
We present a homogeneous survey of near-ultraviolet (NUV) /optical line and continuum emission during twenty M dwarf flares with simultaneous, high cadence photometry and spectra. (washington.edu)
Ratiometric photometry and measurements conducted with Artel's dye solutions provide measurement of small liquid volumes with a high degree of accuracy traceable to the International System of Units (SI). (aicompanies.com)
High-precision tip/tilt mechanisms keep laser beams stabilized and precisely on target. (photonicsonline.com)
using a binning of 3, the read-out time falls to around 10 seconds, value which is still too high for fast photometry pourposes. (eso.org)
Telescope2
The precision telescope mount enables long exposures necessary for observing deep-sky objects. (clarkson.edu)
The Hubble telescope provides four key advantages over most other optical astronomical facilities: unprecedented angular resolution over a large field, spectral coverage from the near infrared to the far ultraviolet, an extremely dark sky, and highly stable images that enable precision photometry. (nationalacademies.org)
Measurements2
Given that we strive for accurate measurements in all aspects of photometry, maybe I should be guiding as well. (aavso.org)
In contrast to fluorescence-based methods, ratiometric photometry provides traceable accuracy and precision measurements by using one dye as an internal standard and a second as the sample. (aicompanies.com)
Metrology1
Ratiometric Photometry combined with Artel's expertise in dye chemistry, metrology, and low-volume liquid handling provide the foundation for our extremely accurate and precise volume measurement systems. (aicompanies.com)
Systematics1
Taking the internal precision and possible systematics in the standard relations into account, [Fe/H] for NGC 752 becomes -0.03 +/-0.02. (arxiv.org)
Lens1
A novel method of digital single lens reflex (DSLR) photometry is described. (aaq.org.au)
Stellar1
For cool M dwarfs, accurate ages combined with their ubiquity in the stellar disk could lead to a new level of precision in age dating the Galaxy. (washington.edu)
Optical2
As Finland's national standards laboratory (Designated Institute) for optical quantities, we are entrusted with upholding the highest standards and performing calibrations of optical quantities with precision. (aalto.fi)
PG&O Precision Glass & Optics provides complete optical solutions that operate in ranges from the mid-UV into the visible and out to the IR wavelength regions. (photonicsonline.com)
Optics2
Precision optics are optimized for maximum efficiency and uniformity. (signify.com)
Both comfort optics and precision optics available, suitable for a range of mounting heights and lumen output. (signify.com)
Dwarf1
Multicolor indices are used to eliminate as nonmembers a large fraction of the low probability proper-motion members near the faint end of the main sequence, while identifying 24 potential dwarf members between V=15.0 and 16.5, eight of which have been noted before from Vilnius photometry. (arxiv.org)
Stars2
These endpoints of all low- and intermediate-mass stars are used as absolute calibrators for a range of science, including precision cosmology. (stsci.edu)
DSLR photometry in white light is a valid procedure, at least in those cases where the color indices of the variable and comparison stars differ by only small values. (aaq.org.au)
Data2
There was also an impression, in some areas, of slightly smoother curves from the white light data, implying improved precision. (aaq.org.au)
The check star data in white light showed slightly smaller ranges and standard deviations for most nights, and for all nights averaged, than those for the non-transformed green channel data, and for the transformed V magnitude data, implying that the best precision was achieved by using the data in white light. (aaq.org.au)
Accuracy5
Our participation in intercomparisons of the Consultative Committee for Photometry and Radiometry (CCPR) of the Bureau International de Poids et Mesures (BIPM) is a testament to our dedication to accuracy. (aalto.fi)
The accuracy and precision of each method were first tested in the laboratory using an ozone generator calibrated by ultraviolet photometry. (cdc.gov)
In the laboratory tests at ozone concentrations of 0.052, 0.201, 0.802, and 1.61 parts per million (ppm), the AID monitor showed good accuracy and precision while more variability was observed with the AKI impinger. (cdc.gov)
Compared to gravimetry, ratiometric photometry offers greater speed, ease-of-use, independence from environmental affects, and enhanced accuracy at small volumes. (aicompanies.com)
As it can be noted, the accuracy in exposure time is better than 0.01 seconds, while the precision is of the order of milliseconds. (eso.org)
Observations1
The CCD photometry is tied to the standard system using an extensive set of published photoelectric observations adopted as secondary standards within the cluster. (arxiv.org)
Light2
The light curve was extracted using aperture photometry and analysed with a transit model using a Markov chain Monte Carlo algorithm. (aanda.org)
60 fps EM mode make it an ideal imaging solution for the capture of low light and fast kinetics, while a slow scan CCD mode with a very low readout noise lends itself well to precision photometry applications. (photonicsonline.com)
Features1
Gardco PureForm LED area small square precision P15 features a sleek, low profile design. (signify.com)
Open2
Precision uvbyCaHbeta photometry of the nearby old open cluster, NGC 752, is presented. (arxiv.org)
In the fast photometry configuration, the WFI shutter always remains open, i.e. integration is controlled via only the powering cycle of the CCD. (eso.org)
Values2
We determine new masses with a precision of 6% for LHS 1140 b (6.48 ± 0.46 M ⊕ ) and 9% for LHS 1140 c ( m c = 1.78 ± 0.17 M ⊕ ). This reduces the uncertainties relative to previously published values by half. (aanda.org)
This is due to the number of digits used to record in the header the values of MJD which allows to reach the precision of 0.004 seconds while for the exposure time the precision is of 1 millisecond. (eso.org)