2004ApJ...611L.125H

Query : 2004ApJ...611L.125H

2004ApJ...611L.125H - Astrophys. J., 611, L125-L128 (2004/August-3)

Correlated X-ray and optical variability in V404 Cygni in quiescence.

HYNES R.I., CHARLES P.A., GARCIA M.R., ROBINSON E.L., CASARES J., HASWELL C.A., KONG A.K.H., RUPEN M., FENDER R.P., WAGNER R.M., GALLO E., EVES B.A.C., SHAHBAZ T. and ZURITA C.

Abstract (from CDS):

We report simultaneous X-ray and optical observations of V404 Cyg in quiescence. The X-ray flux varied dramatically by a factor of ≳20 during a 60 ks observation. X-ray variations were well correlated with those in Hα, although the latter include an approximately constant component as well. Correlations can also be seen with the optical continuum, although these are less clear. We see no large lag between X-ray and optical line variations; this implies they are causally connected on short timescales. As in previous observations, Hα flares exhibit a double-peaked profile suggesting emission distributed across the accretion disk. The peak separation is consistent with material extending outward to at least the circularization radius. The prompt response in the entire Hα line confirms that the variability is powered by X-ray (and/or EUV) irradiation.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Stars: Binaries: Close - Stars: Individual: Constellation Name: V404 Cygni - X-Rays: Binaries

Simbad objects: 1

Full paper

View the references in ADS

Number of rows : 1

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	V* V404 Cyg	HXB	20 24 03.8247037434	+33 52 01.961154861						G9/K0III/V	1370	0

Query : 2004ApJ...611L.125H

Basic data :

V* V404 Cyg -- High Mass X-ray Binary

X (2022MNRAS,Ginga,...), V* (AN,V*,...), HXB (2016ApJS), No* (NOVA), CV* (2017ARep), * (Gaia), gam (INTREF), NIR (2MASS)

20 24 03.8247037434 +33 52 01.961154861 (Optical) [ 0.0525 0.0607 90 ] A 2020yCat.1350....0G

20 22 06.3348384828 +33 42 16.551672751 [ 0.0525 0.0607 90 ]

073.1187765506885 -02.0914613435731 [ 0.0525 0.0607 90 ]

-5.177 -7.778 [0.079 0.092 90] A 2020yCat.1350....0G

V(km/s) -0.400 [~] / z(~) -0.000001 [~] / cz -0.40 [~] E 2000A&AS..144....1M

0.3024 [0.0783] A 2020yCat.1350....0G

G9/K0III/V E 1993MNRAS.265..834C

G 17.215652 [0.008512] C 2022yCat.1355....0G

J 13.575 [0.025] C 2003yCat.2246....0C

H 12.684 [0.027] C 2003yCat.2246....0C

K 12.321 [0.026] C 2003yCat.2246....0C

Overlay

points in this preview

2MASS DSS

All

(CDSPortal)

Send to

An access of full data is available using the icon Vizier near the identifier of the catalogue

`2MASS J20240382+3352021`	`INTREF 1021`	`1SXPS J202404.2+335155`	`4XMM J202403.8+335202`
`AN 100.1938`	`NOVA Cyg 1938`	`2SXPS J202404.0+335151`	`AAVSO 2020+33`
`Ginga 2023+338`	`NOVA Cyg 1989`	`TIC 136874944`	`Gaia DR2 2056188624872569088`
`Ginga 2023+33`	`1RXS J202405.3+335157`	*`V V404 Cyg`**	`Gaia DR3 2056188624872569088`

References (1370 between 1850 and 2026) (Total 1370)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

Follow new references on this object

Collections of Measurements

Observing logs

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

2MASS J20240382+3352021 1RXS J202405.3+335157 V* V404 Cyg Gaia DR2 2056188624872569088 Gaia DR3 2056188624872569088

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2004ApJ...611L.125H and select 'bookmark this link' or equivalent in the popup menu