2005ApJ...620L.103B

Query : 2005ApJ...620L.103B

2005ApJ...620L.103B - Astrophys. J., 620, L103-L106 (2005/February-3)

Multiple outbursts of a cataclysmic variable in the globular cluster M22.

BOND I.A., ABE F., EGUCHI S., FURUTA Y., HEARNSHAW J.B., KAMIYA K., KILMARTIN P.M., KURATA Y., MASUDA K., MATSUBARA Y., MURAKI Y., NODA S., OKAJIMA K., RATTENBURY N.J., SAKO T., SEKIGUCHI T., SULLIVAN D.J., SUMI T., TRISTRAM P.J., YANAGISAWA T., YOCK P.C.M. (The MOA Collaboration)

Abstract (from CDS):

We present a 4 yr light curve of a cataclysmic variable in M22, based on an analysis of accumulated data from the Microlensing Observations in Astrophysics (MOA) microlensing survey. The position of the star coincides with that of a transient event observed by the Hubble Space Telescope (HST) in 1999, originally attributed to microlensing but later suspected to be a dwarf nova outburst. Two outburst episodes, one in 2002 and one in 2003, with ΔI∼3 are seen in the MOA data, thus confirming that the HST event was a dwarf nova outburst. The MOA and HST data show that this dwarf nova underwent at least three outburst episodes during 1999-2004. Further close monitoring of this event is encouraged, as future outburst episodes are expected.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: Individual: Messier Number: M22 - Cosmology: Gravitational Lensing - Stars: Dwarf Novae - Techniques: Image Processing

CDS comments: The CV star in M 22 is Cl* NGC 6656 ACK V1

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 Cl* NGC 104 MAM M54898 CV* 00 24 06.013 -72 04 56.20 19.383   20.411   19.273 ~ 33 0
3 Cl* NGC 5904 SAW V101 CV* 15 18 14.4893282426 +02 05 34.901910063           ~ 31 0
4 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
5 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
6 OGLE BLG-DN-1057 CV* 18 36 24.696 -23 54 35.60     18.77   16.224 ~ 26 0
7 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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