1999A&A...347L..51C


Query : 1999A&A...347L..51C

1999A&A...347L..51C - Astronomy and Astrophysics, volume 347, L51-54 (1999/7-3)

Magnitude, color and spectral type of Aql X-1 in quiescence.

CHEVALIER C., ILOVAISKY S.A., LEISY P. and PATAT F.

Abstract (from CDS):

Direct I and V-band imaging of Aql X-1 in quiescence and during outburst maximum shows that the true optical counterpart is the interloper located 0.48" West of the previously known star. We find for the new counterpart V=21.6 and V-I=2.2 in quiescence, when its contribution to the total light was 12% in V and 22% in I. Analysis of this photometry and of low-resolution spectra of the sum of both stars, also taken during quiescence, shows that the likely spectral types for the previously known star and the optical counterpart are late G and late K, respectively, reddened by E(B-V)=0.5±0.1.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: individual: Aql X-1 - stars: neutron - X-rays: stars

Nomenclature: Table 1: [CIL99] Star a (Nos a-e). Text: [CIL99] CN (Nos C1-C2).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 10

goto View the references in ADS

Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 87521 PM* 10 04 33.9745906248 -39 19 00.723392652   10.17 9.14     K3V 37 0
2 CD-36 6589 ** 10 41 09.3043484838 -36 53 43.665750147 12.608 11.413 9.992 9.841 7.979 M0.5 40 0
3 HD 164500 PM* 18 03 41.4466680264 -45 51 43.442232660   10.42 9.62     G8V 31 0
4 HD 168402 PM* 18 21 11.4634695936 -38 40 56.039096424   9.97 9.30     G3V 13 0
5 HD 171982 PM* 18 39 19.6730763528 -37 42 08.083644732   9.30 8.40     K0V 27 0
6 HD 172582 PM* 18 43 40.5554083008 -50 09 54.043284420   9.98 9.27     G6V 36 0
7 HD 178445 PM* 19 10 52.2681353722 -47 09 31.038072337 11.972 10.672 9.342 8.526 7.809 K6.5V 56 1
8 [CIL99] Star e * 19 11 16.05 +00 35 05.8           ~ 2 1
9 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1073 1
10 [CIL99] Star a * 19 11 16.08 +00 35 05.9           ~ 3 1

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2022.05.22-10:27:57

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