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HD 96231


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DSS Images   Other Images


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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.

Relationship between CN anomaly and U V W components of space velocity.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1962AJ.....67..757Y&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Buyuk Ayi
Sað Açýklýk:11h07m33.23s
Yükselim:+72°07'29.7"
Görünürdeki Parlaklýk:8.558
Uzaklýk:520.833 parsek
özdevim Sað Açýklýk:-1.6
özdevim Yükselim:-1.1
B-T magnitude:8.993
V-T magnitude:8.594

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 96231
TYCHO-2 2000TYC 4388-305-1
USNO-A2.0USNO-A2 1575-03136961
HIPHIP 54379

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