J/A+A/395/499 XMM observations in M8 and NGC6530 (Rauw+, 2002)
An XMM-Newton observation of the Lagoon Nebula and
the very young open cluster NGC 6530.
Rauw G., Naze Y., Gosset E., Stevens I.R., Blomme R., Corcoran M.F.,
Pittard J.M., Runacres M.C.
<Astron. Astrophys. 395, 499 (2002)>
=2002A&A...395..499R 2002A&A...395..499R
ADC_Keywords: Clusters, open ; X-ray sources ; Photometry, UBV
Keywords: ISM: individual objects: M 8 -
open clusters and associations: individual: NGC 6530 -
stars: early-type - stars: pre-main sequence - X-rays: stars
Abstract:
We report the results of an XMM-Newton observation of the Lagoon
Nebula (M 8). Our EPIC images of this region reveal a cluster of point
sources, most of which have optical counterparts inside the very young
open cluster NGC 6530. The bulk of these X-ray sources are probably
associated with low and intermediate mass pre-main sequence stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 107 72 X-ray sources detected in NGC 6530 and found to
have a single counterpart in Sung et al. (2000,
J/AJ/120/333) catalogue or in SIMBAD database.
table2.dat 96 17 X-ray sources with two or more counterparts from
Sung et al. (2000, J/AJ/120/333) inside a radius
of 9"around the position of the X-ray source
table3.dat 47 28 X-ray sources detected in NGC 6530 that have no
counterpart in Sung et al. (2000, J/AJ/120/333)
catalogue and SIMBAD database within a radius of 9"
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)
IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)
J/AJ/120/333 : UBVRI and Hα in NGC 6530 (Sung+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [RNG2002] Sequential number of the source
5- 19 A15 --- XMMU XMMUJ designation (HHMMSS.s+DDMMSS)
21- 24 F4.1 ct/ks MOS1 Vignetting and background corrected
EPIC-MOS1 count rates in 0.5-1.2keV band
26- 28 F3.1 ct/ks e_MOS1 rms uncertainty on MOS1
30- 33 F4.1 ct/ks MOS2 ? Vignetting and background corrected
EPIC-MOS2 count rates in 0.5-1.2keV band
35- 37 F3.1 ct/ks e_MOS2 ? rms uncertainty on MOS2
39- 42 F4.1 ct/ks PN ? Vignetting and background corrected PN
count rates in 0.5-1.2keV band (1)
44- 46 F3.1 ct/ks e_PN ? rms uncertainty on PN
48- 51 I4 --- SCB ? Number of the optical counterpart from
Sung et al. (2000, Cat. J/AJ/120/333)
Cl* NGC 6530 SCB NNNN in Simbad
53- 55 F3.1 arcsec Dist Separation from the position of the
X-ray source
57- 61 F5.2 mag Vmag V magnitude (2)
63- 66 F4.2 mag B-V ? B-V colour index (2)
68- 71 F4.2 mag V-I ? V-I colour index (2)
73 A1 --- Var [YN?] Variability
75-107 A33 --- Com Comments (3)
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Note (1): For sources affected by the gaps between the detectors, we do not
quote the count rate for the corresponding instrument.
Note (2): The photometric data are taken from Sung et al. (2000,
Cat. J/AJ/120/333), except for V1752 Sgr.
Note (3): Information about the spectral types, pre-main sequence classification
and the membership probability (Pµ) according to the proper motion
study of van Altena & Jones (1972A&A....20..425V 1972A&A....20..425V).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [RNG2002] Sequential number of the source
5- 19 A15 --- XMMU XMMUJ designation (HHMMSS.s+DDMMSS)
21- 24 F4.1 ct/ks MOS1 ? Vignetting and background corrected
EPIC-MOS1 count rates in 0.5-1.2keV band
26- 28 F3.1 ct/ks e_MOS1 ? rms uncertainty on MOS1
30- 32 F3.1 ct/ks MOS2 ? Vignetting and background corrected
EPIC-MOS2 count rates in 0.5-1.2keV band
34- 36 F3.1 ct/ks e_MOS2 ? rms uncertainty on MOS2
38- 41 F4.1 ct/ks PN ? Vignetting and background corrected PN
count rates in the 0.5-1.2 keV band
43- 45 F3.1 ct/ks e_PN ? rms uncertainty on PN
47- 50 I4 --- SCB1 First possible optical counterpart (1)
51 A1 --- --- [/]
52- 55 I4 --- SCB2 Second possible optical counterpart
number (1)
56 A1 --- --- [/]
57- 60 I4 --- SCB3 ? Third possible optical counterpart
number (1)
62- 64 F3.1 arcsec Dist1 ? Separation from the position of the
X-ray source for SCB1
65 A1 --- --- [/]
66- 68 F3.1 arcsec Dist2 ? Separation from the position of the
X-ray source for SCB2
69 A1 --- --- [/]
70- 72 F3.1 arcsec Dist3 ? Separation from the position of the
X-ray source for SCB3
74 A1 --- Var [YN?] Variability
76- 94 A19 --- Com Comments
96 A1 --- Note [abc] Note (2)
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Note (1): Number from Sung et al. (2000, Cat. J/AJ/120/333),
Cl* NGC 6530 SCB NNNN in Simbad
Note (2): Individual notes as follows:
a = CB 1028 is classified as a PMS star, while SCB 1039 is a PMS
candidate (Sung et al. 2000).
b = SCB 142 is a Hα emitting star (LkHα106) while
SCB 1019 is a PMS star (Sung et al., J/AJ/120/333).
c = Source #75 (XMMU J180350.5-242110) lies within the wings of the
PSF of 9 Sgr. Therefore no accurate count rates can be provided.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [RNG2002] Sequential number of the source
5- 19 A15 --- XMMU XMMUJ designation (HHMMSS.s+DDMMSS)
21- 23 F3.1 ct/ks MOS1 ? Vignetting and background corrected
EPIC-MOS1 count rates in 0.5-1.2keV band
25- 27 F3.1 ct/ks e_MOS1 ? rms uncertainty on MOS1
28 A1 --- n_MOS1 [a] See note (1)
29- 32 F4.1 ct/ks MOS2 ? Vignetting and background corrected
EPIC-MOS2 count rates in 0.5-1.2keV band
34- 36 F3.1 ct/ks e_MOS2 ? rms uncertainty on MOS2
37 A1 --- n_MOS2 [a] See note (1)
38- 41 F4.1 ct/ks PN ? Vignetting and background corrected PN
count rates in the 0.5-1.2 keV band
43- 45 F3.1 ct/ks e_PN ? rms uncertainty on PN
47 A1 --- Var [YN?] Variability (G1)
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Note (1): a: Source #90 (XMMU J180252.9-241525) lies outside the field of
view of the MOS instruments, but is detected as a rather bright
source with (1.14±0.23)*10-2cts/s in the PN image.
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Global notes:
Note (G1): Indicates whether variability is detected at the 95% confidence
level (Y) or not (N). Those sources flagged with a "?'' show some
hints of variability in their light curve, but this is not found to be
significant by the Kolmogorov-Smirnov test.
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 29-Apr-2003