Systematic search for variability of X-ray sources. II. The low galactic latitude sample

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114592· OSTI ID:5293960

Mereghetti, S; Garilli, B

A search for variability on timescales from 1 day to years has been carried out for 120 X-ray sources observed with the Einstein Observatory Imaging Proportional Counter. All the sources are at low galactic latitude and most of them have soft X-ray fluxes in the range 10 to the -13th to 10 to the -12th erg/sq cm sec. Significant flux variations have been detected in 17 sources. A strong flare, with a flux increase of a factor of about 100 in about 400 sec, has been discovered in an optically unidentified source. This is probably a dwarf M flare star or an RS CVn system. 40 references.

• Research Organization: CNR, Istituto di Fisica Cosmica, Milan (Italy)
• OSTI ID: 5293960
• Journal Information: Astron. J.; (United States), Vol. 94
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC X-RAY SOURCES
VARIATIONS
PROPORTIONAL COUNTERS
RADIANT FLUX DENSITY
SOFT X RADIATION
STELLAR FLARES
VARIABLE STARS
COSMIC RAY SOURCES
ELECTROMAGNETIC RADIATION
FLUX DENSITY
IONIZING RADIATIONS
MEASURING INSTRUMENTS
RADIATION DETECTORS
RADIATIONS
STARS
STELLAR ACTIVITY
X RADIATION
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources