A full decade (2009-2019) of continuous nightglow observations from the NUV to the NIR

2021 ◽  
Author(s):  
Wolfgang Kausch ◽  
Stefan Noll ◽  
Stefan Kimeswenger ◽  
Sabine Moehler
Keyword(s):  
Wavelength Range ◽  
Near Infrared ◽  
Data Set ◽  
Mesopause Region ◽  
Infrared Wavelength ◽  
Near Ultraviolet ◽  
Very Large Telescope ◽  
Medium Resolution ◽  
Wide Wavelength Range ◽  
Atomic Lines

<p>The airglow emission of the mesopause region comprises molecular bands and atomic lines in the near-ultraviolet to the near-infrared wavelength range, e.g. the prominent roto-vibrational OH bands, a weak FeO/NiO continuum, the green OI line, the NaD doublet and some others. Since ground-based astronomical facilites observe through the Earth's atmosphere, the fingerprint of these emissions is visible in astronomical spectra taken with a telescope.<br>We have assembled a comprehensive data set of about 100,000 spectra in total taken between 1st of October 2009 and 30th of September 2019 with the X-shooter spectrograph, which is mounted at the Very Large Telescope in the Chilean Atacama desert (24.6°S, 70.4°W). This instrument provides medium-resolution spectra covering the entire wavelength range from 0.3 to 2.5μm simultaneously by incorporating three spectral subranges (UVB: 0.3-0.56μm; VIS: 0.56-1.02μm; NIR: 1.02-2.5μm).</p><p>The X-shooter instrument was continuously in operation during the covered period and frequently used by astronomers. Thus, the temporal coverage of the available observations is very dense for astronomical data allowing various airglow studies on time scales from minutes to a full decade. Due to the simultaneously observed wide wavelength range, individual airglow emitters as well as correlations between them can be investigated in detail (cf. Noll et al. 2021, this session, for more information).</p><p>In this presentation we describe the properties and the calibration of this unique data set.</p>

Hybridization-sensitive fluorescence control in the near-infrared wavelength range

2011 ◽  
Vol 9 (11) ◽  
pp. 4199 ◽  
Author(s):  
Shuji Ikeda ◽  
Hiroyuki Yanagisawa ◽  
Akiko Nakamura ◽  
Dan Ohtan Wang ◽  
Mizue Yuki ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Near Infrared ◽  
Infrared Wavelength

The Copernicus atmospheric Mission Sentinel-4: Status of algorithm developments for the L1b and L2 processors

2020 ◽  
Author(s):  
Grégory Bazalgette Courrèges-Lacoste ◽  
Norrie Wright ◽  
Ben Veihelmann ◽  
Berit Ahlers ◽  
Olivier Le Rille ◽  
...  
Keyword(s):  
Air Quality ◽  
Wavelength Range ◽  
Near Infrared ◽  
Quality Parameters ◽  
Atmospheric Composition ◽  
Signal Loss ◽  
Infrared Wavelength ◽  
Ground Segment ◽  
Spectral Bands ◽  
The Status

<p>The Copernicus missions Sentinel-4 (S4) and Sentinel-5 (S5) will carry out atmospheric composition observations on an operational long-term basis to serve the needs of the Copernicus Atmosphere Monitoring Service (CAMS) and the Copernicus Climate Change Service (C3S).</p><p>Building on the heritage from instruments such as GOME, SCIAMACHY, GOME-2, and OMI, S4 is an imaging spectrometer instruments covering wide spectral bands in the ultraviolet and visible wavelength range (305-500nm) and near infrared wavelength range (750-775 nm). S4 will observe key air quality parameters with a pronounced temporal variability by measuring NO<sub>2</sub>, O<sub>3</sub>, SO<sub>2</sub>, HCHO, CHOCHO, and aerosols over Europe with an hourly revisit time.</p><p>A series of two S4 instruments will be embarked on the geostationary Meteosat Third Generation-Sounder (MTG-S) satellites. S4 establishes the European component of a constellation of geostationary instruments with a strong air quality focus, together with the NASA mission TEMPO and the Korean mission GEMS.</p><p>This paper will address the development status of the L1b Operational Processor (L1OPS) by EUMETSAT and the supporting L1b reference processor (L1RP) developed by ESA; In dedicated cases (e.g. CTI, Non-linearity signal loss, ...) the algorithms input from the S4 Industrial Prime have been used. The paper will also provide an overview of the status of the Level 2 processor developed by ESA for integration into the EUMETSAT MTG-S ground segment.</p>

scholarly journals The Carnegie Supernova Project II

2020 ◽  
Vol 639 ◽  
pp. A103 ◽  
Author(s):  
M. D. Stritzinger ◽  
F. Taddia ◽  
M. Fraser ◽  
T. M. Tauris ◽  
N. B. Suntzeff ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Electron Capture ◽  
Near Infrared ◽  
Companion Paper ◽  
Infrared Emission ◽  
Light Curves ◽  
Data Set ◽  
Mid Infrared ◽  
Space Telescope ◽  
Infrared Wavelength

We present multiwavelength observations of two gap transients that were followed by the Carnegie Supernova Project-II. The observations are supplemented with data obtained by a number of different programs. Here in the first of two papers, we focus on the intermediate-luminosity red transient (ILRT) designated SNhunt120, while in a companion paper we examine the luminous red novae AT 2014ej. Our data set for SNhunt120 consists of an early optical discovery, estimated to be within three days after outburst, the subsequent optical and near-infrared broadband followup extending over a period of about two months, two visual and two near-infrared wavelength spectra, and Spitzer Space Telescope observations extending from early (+28 d) to late (+1155 d) phases. SNhunt120 resembles other ILRTs such as NGC 300-2008-OT and SN 2008S, and like these other ILRTs, SNhunt120 exhibits prevalent mid-infrared emission at both early and late phases. From the comparison of SNhunt120 and other ILRTs to electron-capture supernova simulations, we find that the current models underestimate the explosion kinetic energy and thereby produce synthetic light curves that overestimate the luminosity. Finally, examination of pre-outburst Hubble Space Telescope images yields no progenitor detection.

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