Continuum in night airglow between 8000 and 11, 000 Å

Sobolev, V. G.

doi:10.1016/0032-0633(78)90103-4

Cited by 18 publications

(17 citation statements)

References 5 publications

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“…At the Zvenigorod station in the Crimea Sobolev (1978) observing at 8210, 9268 and 10612 A,where there are no hydroxyl lines found that the continuum intensity is 1-2R/A and that it does not rise markedly with increase in wavelength as had earlier been inferred through a misunderstanding, later elucidated by Koxon (1978), of the nightglow atlas of Broadfoot & Kendall (1968). The misunderstanding had led Gadsen & Marovich (1973) to invoke as the source the binary chemiluminescent process…”

Section: Ground Level Observationsmentioning

confidence: 78%

“…However, the spectral distribution of this infrared chemiluminescence (Clough & Thrush 1967) is utterly disparate from that observed by Sobolev (1978) and, as may easily be verified, the contribution to the nightglow is inappreciable.…”

Section: Ground Level Observationsmentioning

confidence: 81%

“…Compelling evidence against process (1) being responsible for the nightglow continuum in the visible spectral region was adduced many years ago by Barbier & Noxon (1978) at 8600 A ; Sobolev (1978) at 9268 A ; Sobolev at 10612 A. Glaume (1960).…”

Section: Ground Level Observationsmentioning

confidence: 99%

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Cause of terrestrial nightglow continuum

Bates

1993

Proc. R. Soc. Lond. A

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Since the nightglow’s green continuum was discovered over 40 years ago the theory that it arises from the NO 2 air afterglow has been generally accepted so that its intensity is regarded as a useful measure of the abundance of nitric oxide in the lower thermosphere. This theory is shown to be untenable. Observational evidence points unambiguously to a novel source: metastable oxygen molecules colliding with ambient gas molecules and thereby forming complexes that dissociate by allowed radiative transitions.

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Section: Ground Level Observationsmentioning

confidence: 78%

Section: Ground Level Observationsmentioning

confidence: 81%

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Cause of terrestrial nightglow continuum

Bates

1993

Proc. R. Soc. Lond. A

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“…Maihara et al (1993) greatest component of the continuum on a dark night is expected to be the night glow continuum, and a compilation of the available results from the literature (Content 1996) apparently supports this theory. A night sky continuum of 300 photon s ¹1 m ¹2 arcsec ¹2 m ¹1 was assumed (Sobolev 1978). This gave a J-band total of 72 photon s ¹1 m ¹2 arcsec ¹2 band ¹1 .…”

Section: S I G N a L -T O -N O I S E R At I O I M P R Ov E M E N Tmentioning

confidence: 99%

Rugate filters for OH-suppressed imaging at near-infrared wavelengths

Offer

Bland‐Hawthorn

1998

Monthly Notices of the Royal Astronomical Society

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Ground-based observations at near-infrared wavelengths are severely affected by atmospheric OH bands. Many authors have recognized the potential gains in sensitivity from suppressing these features. Dispersive instruments show some promise but are both expensive and complicated to build. OH suppression filters using single or periodic notches have the advantage of simplicity but significant gains have not yet been realised. Rugate filters (with graded index inhomogeneous coatings) offer key advantages for astronomical imaging. It is possible to produce a transmission profile comprising a series of irregular and sharply defined bandpasses. We demonstrate through numerical simulation that it should be possible to achieve 95% suppression of the OH features in the J photometric band, while retaining roughly half of the spectral coverage. This would lead to extraordinary gains in sensitivity even for observations of continuum sources. In addition, these filters allow much longer exposures before the detector saturates on the sky background. (I and z-band filters can also be envisaged.) In 1" seeing, a J-band rugate filter used in conjunction with a 4m telescope would detect a J=23 continuum source at 5.0-sigma in a single 10 min exposure. In comparison, a conventional J filter requires multiple exposures for a 10 minute integration time and achieves only a 2.5-sigma detection. For emission line sources, the rugate filter has an even bigger advantage over conventional filters, with a fourfold increase in signal:noise ratio possible in certain instances. Astrophysical studies which could benefit from rugate filters are searches for very low mass stars and galaxy evolution out to z=3.Comment: 13 pages; Latex; 11 encapsulated postscript figures; submitted to MNRA

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“…The obtained height distributions agree well with the ENVISAT satellite limb measurements within 2002 July -October 21 . Testing the integrated intensity was performed by using ground-based measurements in Zvenigorod 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Height distribution of the upper atmosphere continuum infrared emissions

Semenov

Shefov

Медведева

2014

20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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We calculated the absolute integrated intensity of the continuum emission infrared components using the laboratoryobtained rates of photochemical reaction between nitric oxide molecules and oxygen atoms, as well as with non-excited and excited ozone molecules. Altitude distribution of the intensity of continuum radiation in atmosphere in infrared region of a spectrum covers a range of heights of the middle atmosphere from 10 up to 15 km with a maximum at height about 30 km.

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Continuum in night airglow between 8000 and 11, 000 Å

Cited by 18 publications

References 5 publications

Cause of terrestrial nightglow continuum

Cause of terrestrial nightglow continuum

Rugate filters for OH-suppressed imaging at near-infrared wavelengths

Height distribution of the upper atmosphere continuum infrared emissions

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