J/MNRAS/391/1279 Multiwavelength study of NGC 7419 (Joshi+, 2008)
Multiwavelength study of a young open cluster NGC7419.
Joshi H., Kumar B., Singh K.P., Sagar R., Sharma S., Pandey J.C.
<Mon. Not. R. Astron. Soc., 391, 1279-1300 (2008)>
=2008MNRAS.391.1279J 2008MNRAS.391.1279J
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, H-alpha ;
X-ray sources
Keywords: stars: emission-line, Be - stars: formation -
stars: pre-main-sequence - X-rays: galaxies: clusters - X-rays: stars
Abstract:
Using new UBVRI Hα CCD photometric observations and the archival
infrared and X-ray data, we have carried out a multiwavelength study
of a Perseus arm young open star cluster NGC 7419. Using XMM-Newton
observations, we found several X-ray sources in the cluster region but
none of the Herbig Ae/Be stars is detected in X-rays.
Description:
The optical observations of NGC 7419 were carried out using a thinned
back-illuminated CCD camera mounted at f/13 Cassegrain focus of the
104-cm Sampurnanand reflector telescope of Aryabhatta Research
Institute of Observational Sciences, Nainital.
Broad-band Johnson UBV, Cousins RI and narrow-band Hα line
(λ=656.5nm) and Hα continuum (λ=665nm)
filters were used for observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 124 1817 UBVRI and Hα photometric data of the sample
stars in 13'x13' region
table6.dat 86 44 Photometric properties of 44 Hα
emission-line stars in 13x13arcmin2 region
around NGC 7419
table13.dat 78 66 X-ray sources detected using SAS task edetect_chain
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See also:
J/ApJS/93/187 : UBV Photometry in NGC 7419 (Beauchamp+ 1994)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [JKS2008] Sequential number
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 29 F5.2 arcsec DEs Declination (J2000)
31- 38 F8.3 pix Xpos X position (1)
40- 46 F7.3 pix Ypos Y position (1)
48- 53 F6.3 mag Umag ?=99.999 Johnson U magnitude
55- 59 F5.3 mag e_Umag ?=9.999 rms uncertainty on Umag
61- 66 F6.3 mag Bmag ?=99.999 Johnson B magnitude
68- 72 F5.3 mag e_Bmag ?=9.999 rms uncertainty on Bmag
74- 79 F6.3 mag Vmag ?=99.999 Johnson V magnitude
81- 85 F5.3 mag e_Vmag ?=9.999 rms uncertainty on Vmag
87- 92 F6.3 mag Rcmag ?=99.999 Cousins R magnitude
94- 98 F5.3 mag e_Rcmag ?=9.999 rms uncertainty on Rcmag
100-105 F6.3 mag Icmag ?=99.999 Cousins I magnitude
107-111 F5.3 mag e_Icmag ?=9.999 rms uncertainty on Icmag
113-118 F6.3 mag Ha ?=99.999 Hα index (2)
120-124 F5.3 mag e_Ha ?=9.999 rms uncertainty on Ha
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Note (1): X and Y positions of stars in the CCD are converted into RA+Dec
J2000 using the Guide Star Catalogue II (GSC 2.2, 2001, Cat. I/271)
Note (2): index computed from a a narrow-band Hα (8nm around 656.5nm)
and a Hα continuum filter
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [JKS2008] ? Sequential number
4 A1 --- f_[JKS2008] [a] indicates a Vmag error ≥ 0.1mag
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 13 I2 s RAs Right ascension (J2000)
15 A1 --- DE- Declination sign (J2000)
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 23 I2 arcsec DEs Declination (J2000)
25- 29 F5.1 pix Xpos X position
31- 35 F5.1 pix Ypos Y position
37- 42 F6.3 mag Vmag ?=99.999 Johnson V magnitude
43- 48 F6.3 mag Rcmag ?=99.999 Cousins R magnitude
49- 54 F6.3 mag Ha ?=99.999 Hα index
55- 60 F6.3 mag Rc-Ic ?=99.999 Cousins R-I colour index
61- 63 A3 --- Det [Yes No] Detection in the present work
66- 68 A3 --- --- [BMD]
70- 73 I4 --- BMD ? Beauchamp et al. (1994, Cat. J/ApJS/93/187)
designation, BMD NNNN (3)
75- 79 A5 -- Note [PK field] Note (4)
82- 86 A5 --- SMB Subramaniam et al. (2006MNRAS.370..743S 2006MNRAS.370..743S)
designation, SMB A (3)
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Note (3): Nomenclature note:
* BMD NNNN are identified as CL* NGC 7419 BMD NNNN in Simmbad
* SMB A are identified as Cl* NGC 7419 SMB A in Simmbad
Note (4): Notes as follows:
PK = star present in Pigulski & Kopacki (2000A&AS..146..465P 2000A&AS..146..465P)
field = star located outside the cluster region (see Section 2.4)
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Byte-by-byte Description of file: table13.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- [JKS2008] Sequential number, XNN (1)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 12 I2 s RAs Right ascension (J2000)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 22 I2 arcsec DEs Declination (J2000)
24- 29 F6.2 10-3ct/s CR pn-equivalent count rate in energy band
0.3-7.5keV
31- 34 F4.2 10-3ct/s e_CR rms uncertainty on CR
36- 37 A2 --- l_HR1 [≤ ] Limit flag on HR1 (2)
38- 42 F5.2 --- HR1 HR1 hardness ratio (3)
44- 48 F5.3 --- e_HR1 ? rms uncertainty on HR1
50- 51 A2 --- l_HR2 [≤ ] Limit flag on HR2 (2)
52- 56 F5.2 --- HR2 HR2 hardness ratio (3)
58- 62 F5.3 --- e_HR2 ? rms uncertainty on HR2
63- 78 A16 --- Rem Remark (4)
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Note (1): Identification number from X-ray source detection and display
in Fig. 18
Note (2): The sign '≤' represents the hardness ratio calculated after
replacing zero counts by upper limits in either of the energy band
Note (3): HR1=(M-S)/(M+S) and HR2=(H-M)/(H+M) where S=0.3-0.7keV,
M=0.7-1.2keV and H=1.2-7.5keV.
Note (4): Remarks as follows:
PCM = X-ray source with membership probability using hardness
ratio - the X-ray sources inside the dotted box in Fig. 20
IR = X-ray source with NIR counterparts within 6-arcsec search
radius using 2MASS data
OPT = X-ray source with optical counterparts within 6-arcsec search
radius using our UBVRI photometry
Cl = X-ray source within cluster region NGC 7419 - see Section 3.1
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 04-May-2009