SKY-MAP.ORG

Sopravvivere Nell'Universo

HD 89773

Contenuti

Immagini
Articoli relazionati
Link relazionati
Gruppi

Immagini

Carica la tua immagine

DSS Images Other Images

Articoli relazionati

GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies. Not Available
Limits on the short-timescale near-infrared variability of Seyfert 1 nuclei We present new time-resolved photometric observations and images at 2.2microns of a small sample of X-ray variable Seyfert 1 nuclei. Aftercorrecting for dilution by the host galaxy in the observing aperture, wecompare the fractional variation, over the timescales of theobservations, in the near-infrared (NIR) to that expected in the X rays.We have not detected with confidence any NIR variability on timescalesshort enough to be incompatible with the dust reradiation scenario. Thegalaxy-corrected upper limits which we have obtained for variations onshort timescales, typical of non-thermal processes, imply that the NIRemission is dominated by a slowly varying, presumably reprocessed,component which accounts for no less than 80%-90% of the total.
Jupiter and Galilean satellites' positions obtained in April 1978 with the GPO 40 CM /f = 4 m/ of the ESO, La Silla Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&AS...40..375D&db_key=AST

Sottometti un nuovo articolo

Link relazionati

- Nessun link trovato -

Sottometti un nuovo link

Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:	Leone
Ascensione retta:	10^h21^m53.77^s
Declinazione:	+19Â°47'35.4"
Magnitudine apparente:	8.914
Moto proprio RA:	-53.4
Moto proprio Dec:	-30.2
B-T magnitude:	9.477
V-T magnitude:	8.961

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 89773
TYCHO-2 2000	TYC 1423-226-1
USNO-A2.0	USNO-A2 1050-06264465

→ Richiesta di ulteriori cataloghi da VizieR