2003ApJ...597L.137A

Query : 2003ApJ...597L.137A

2003ApJ...597L.137A - Astrophys. J., 597, L137-L140 (2003/November-2)

A probable dwarf nova outburst in the core of the globular cluster M22.

ANDERSON J., COOL A.M. and KING I.R.

Abstract (from CDS):

We reexamine an event that was previously reported by Sahu et al. as a microlensing event of a Galactic bulge star by a star of M22. We find strong evidence that the event was actually a dwarf nova outburst of a cataclysmic variable in the cluster. The primary evidence consists of the star's proper motion, Hα emission, X-ray luminosity, and variable brightness in quiescence. The star is in the cluster core but can be monitored from the ground for future outbursts to confirm its nature. This is one of a very small number of confirmed or probable dwarf nova eruptions seen in globular clusters and the first to be found in such a low-concentration cluster.

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Journal keyword(s): Galaxy: Globular Clusters: Individual: Messier Number: M22 - Galaxy: Globular Clusters: Individual: NGC Number: NGC 6656 - Cosmology: Gravitational Lensing - Stars: Novae, Cataclysmic Variables - Stars: Dwarf Novae

Nomenclature: Cl* NGC 6656 ACK V1.

Simbad objects: 12

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Number of rows : 12
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 Cl* NGC 104 SAW V39 * 00 24 04.913 -72 04 55.36 17.678   17.391   16.45 ~ 39 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
3 Cl* NGC 104 MAM M54898 CV* 00 24 06.013 -72 04 56.20 19.383   20.411   19.273 ~ 33 0
4 Cl* NGC 5904 SAW V101 CV* 15 18 14.4893282426 +02 05 34.901910063           ~ 31 0
5 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
6 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
7 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
8 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
9 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
10 OGLE BLG-DN-1057 CV* 18 36 24.696 -23 54 35.60     18.77   16.224 ~ 26 0
11 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1
12 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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