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NGC 4151 line-continuum diagram sequences
We present the first results of an 8-year spectroscopic monitoring of the Seyfert 1.5 galaxy NGC 4151 carried out with a CCD spectrograph at the 2.6-m Shajn Telescope of the... -
ROSAT detected quasars. II.
We present the broad band, radio - to - X-ray, properties of a large sample of mostly previously optically unidentified radio-loud X-ray sources from the correlation of a ROSAT... -
LBQS0302-0019 NIRSpec spectrum
LBQS 0302-0019 is a blue quasar (QSO) at z~3.3 that hosts powerful outflows and resides in a complex environment consisting of an obscured active galactic nucleus (AGN)... -
NIR lines for AGN up to z~3
Optical rest-frame spectroscopic diagnostics are usually employed to distinguish between star formation and active galactic nucleus (AGN) powered emission. However, this method... -
Reddening of ~35000 quasars from SDSS
We explore the extinction/reddening of ~35000 uniformly selected quasars with 0<z{<=}5.3 in order to better understand their intrinsic optical/ultraviolet (UV) spectral... -
KISS H{alpha} survey list 1
The KPNO International Spectroscopic Survey (KISS) is a new objective-prism survey for extragalactic emission-line objects. It combines many of the features of previous slitless... -
High-redshift quasars in SDSS
This is the third paper in a series aimed at finding high-redshift quasars from five-color (u'g'r'i'z') imaging data taken along the celestial equator by the Sloan Digital Sky... -
QSOs in 2MASS second incremental data release
Using the 2MASS Second Incremental Data Release (Cat. ), we have searched for near-infrared counterparts to 13214 quasars from the Veron-Cetty & Veron (Cat. ) catalog. We... -
NGC 7469 X-ray spectra
We investigate the physical structure of the active galactic nucleus (AGN) wind in the Seyfert-1 galaxy NGC 7469 through high-resolution X-ray spectroscopy with Chandra HETGS... -
Catalog of NLS1s galaxies in 6dFGS survey
We present a new accurate catalog of narrow-line Seyfert 1 galaxies (NLS1s) in the southern hemisphere from the Six-degree Field Galaxy Survey (6dFGS) final data release, which... -
Narrow line Seyfert 1 (NLS1) galaxies spectra
Many active galactic nuclei (AGN) and particularly narrow line Seyfert 1 (NLS1) galaxies, usually exhibit blueshifts and blue wings in several emission lines, which are mainly... -
The Parkes quarter-Jansky flat-spectrum sample
We present a new sample of quarter-Jansky flat-spectrum radio sources selected to search for high-redshift quasars and to study the evolution of the flat-spectrum quasar... -
SwiftFT catalog
An accurate census of the active galactic nuclei (AGN) is a key step in investigating the nature of the correlation between the growth and evolution of super massive black holes... -
QSOs CaII absorbers
We present a systematic study of weak intervening CaII absorbers at low redshift (z<0.5), based on the analysis of archival high-resolution (R>=45000) optical spectra of... -
IPRT/AMATERAS data
IITATE Planetary Radio Telescope(IPRT) / AMATERAS solar radio spectro-polarimeter Data -
IPRT/AMATERAS data
Iitate Planetary Radio Telescope Data
