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Start Over Subject active-galactic-nuclei Publisher The GAVO DC team
1. Digitized First Byurakan Survey (DFBS) Extracted Spectra
ID:
ivo://org.gavo.dc/dfbsspec/q/spectra
Title:
Digitized First Byurakan Survey (DFBS) Extracted Spectra
Short Name:
dfbsspec.spectra
Date:
27 Dec 2024 08:31:13
Publisher:
The GAVO DC team
Description:
This table contains basic metadata as well as the spectra from the Digital First Byurakan Survey (DFBS).
2. Digitized First Byurakan Survey (DFBS) Plate Scans
ID:
ivo://org.gavo.dc/dfbs/q/i
Title:
Digitized First Byurakan Survey (DFBS) Plate Scans
Short Name:
DFBS plates
Date:
27 Dec 2024 08:31:04
Publisher:
The GAVO DC team
Description:
First Byurakan survey plate scan service
3. Digitized First Byurakan Survey (DFBS) Spectra Query Service
ID:
ivo://org.gavo.dc/dfbsspec/q/getssa
Title:
Digitized First Byurakan Survey (DFBS) Spectra Query Service
Short Name:
DFBS SSAP
Date:
27 Dec 2024 08:31:13
Publisher:
The GAVO DC team
Description:
The First Byurakan Survey (FBS) is the largest and the first systematic objective prism survey of the extragalactic sky. It covers 17,000 sq.deg. in the Northern sky together with a high galactic latitudes region in the Southern sky. The FBS has been carried out by B.E. Markarian, V.A. Lipovetski and J.A. Stepanian in 1965-1980 with the Byurakan Observatory 102/132/213 cm (40"/52"/84") Schmidt telescope using 1.5 deg. prism. Each FBS plate contains low-dispersion spectra of some 15,000-20,000 objects; the whole survey consists of about 20,000,000 objects.
4. Sasmirala Subarcsecond mid-infrared atlas of local AGN
ID:
ivo://org.gavo.dc/sasmirala/q/im
Title:
Sasmirala Subarcsecond mid-infrared atlas of local AGN
Short Name:
sasmirala atlas
Date:
27 Dec 2024 08:31:05
Publisher:
The GAVO DC team
Description:
These FITS images were generated with the IDL package MIRphot [Asmus2014]_ by extraction (and combination) of the sub-images from the chopped/nodded total images from COMICS, Michelle, T-ReCS and VISIR (see [Asmus2014]_ for details). The FITS images contain the central ~4 arcsec of each source centered on the (putative) nuclear position with North being up and East to the left. The WCS registration has been performed after extraction by using coordinates of the nucleus from other wavelengths (mostly 2MASS and NED). The uncertainty of these reference position is usually less than 1 arcsec. In addition, the imprecision of the assignment itself is ~1px ~ 0.1". The FITS images are flux calibrated (unit is mJy) using the Gaussian 2D fits to the corresponding STD observation (where available, otherwise using the median conversion factor for the used instrument/filter settings). Therefore, correction factors have to be applied in case other flux measurement methods are applied to the images. The flux values given in the FITS headers should be regarded as approximate values. In particular for the instruments, VISIR and COMICS, they are not necessarily exactly equal to the values provided in the photometry results table, because many flux measurements were performed during the process of combining individual subimages (all in MIRphot), instead of in the final combined image, provided here. The used total images are available upon request. Note, however, that these are just the products of the observatory-delivered pipelines with default parameters. .. [Asmus2014] Asmus D., Hoenig S.F., Gandhi P., Smette A., Duschl W.: The subarcsecond mid-infrared view of local active galactic nuclei: I. The N- and Q-band imaging atlas, `2014MNRAS.439.1648A <http://ads.ari.uni-heidelberg.de/abs/2014MNRAS.439.1648A>`_
5. Sasmirala Subarcsecond mid-infrared atlas of local AGN, Cone Search
ID:
ivo://org.gavo.dc/sasmirala/q/cone
Title:
Sasmirala Subarcsecond mid-infrared atlas of local AGN, Cone Search
Short Name:
sasmirala cone
Date:
27 Dec 2024 08:31:05
Publisher:
The GAVO DC team
Description:
The Subarcsecond mid-infrared (MIR) atlas of local active galactic nuclei (AGN) is a collection of all available N- and Q-band images obtained at ground-based 8-meter class telescopes with public archives (Gemini/Michelle, Gemini/T-ReCS, Subaru/COMICS, and VLT/VISIR). It includes in total 895 images, of which 60% are perviously unpublished. These correspond to 253 local AGN with a median redshift of 0.016. The atlas contains the uniformly processed and calibrated images and nuclear photometry obtained through Gauss and PSF fitting for all objects and filters. This also includes measurements of the nuclear extensions. In addition, the classifications of extended emission (if present) and derived nuclear monochromatic 12 and 18 micron continuum fluxes are available. Finally, flux ratios with the circumnuclear MIR emission (measured by Spitzer) and total MIR emission of the galaxy (measured by IRAS) are presented.