Sentences with phrase «along the line of sight from»

Thus, measuring how much gamma rays of different energies are attenuated or weakened from blazars at different distances from Earth indirectly gives a measurement of how many EBL photons of different wavelengths exist along the line of sight from blazar to Earth over those different distances.

Rusu's contribution was to measure the distribution of mass along the line of sight from quasar to telescope.

Not exact matches

Follow - up images and analyses, posted June 30 at arXiv.org, showed that light is probably from a single bright blue star that coincidentally was behind the galaxy cluster, aligned along Hubble's line of sight.

Astronomer Dennis Zaritsky of the University of Arizona in Tucson notes that the ring could result from a chance alignment of dark matter lumps along Hubble's line of sight.

To draw that conclusion, the researchers had to rule out other effects, such as polarization that could arise from dust particles along the line of sight.

The spectra revealed each star's velocity along our line of sight, because a star moving towards us shows a blue shift in its spectrum, whereas a star moving away from us shows a red shift.

From these spectra, researchers can identify the molecules present at every point and determine their velocities (speed plus direction) along the line - of - sight; this information provides the third dimension — the depth of the coma.

The calculations take into account radiometer noise, intrinsic variability of the pulses that causes «jitter noise», pulse broadening from scattering along the entire line of sight, and the finite number of scintles in the timing data.

Based on the extreme, deduced photometric redshift of GRB 000131 indicating that the gamma rays had travelled an extreme long cosmological distance, astronomers predicted a «break» in the red region of the spectrum around 670 to 700 nm from the strong absorption of light from intervening intergalactic hydrogen clouds along the line of sight between GRB 000131 and the Solar System.

We detect C3 in absorption arising from the warm envelope surrounding the... ▽ More We present spectrally resolved observations of triatomic carbon (C3) in several ro - vibrational transitions between the vibrational ground state and the low - energy nu2 bending mode at frequencies between 1654 - 1897 GHz along the sight - lines to the submillimeter continuum sources W31C and W49N, using Herschel's HIFI instrument.

In 1896 Swedish chemist and Nobel laureate Svante Arrhenius used Langley's bolometer to measure the heat from the Moon at various altitudes above the horizon in order to estimate the dependence of atmospheric heat trapping on amount of water vapor and CO2 along the line of sight to the Moon, a much longer path near the horizon than at 45 degrees.