J/A+AS/140/135 Stromgren Photometry in NGC 3680 and NGC 6134 (Bruntt+, 1999)
Stromgren Photometry of open clusters NGC 3680 and NGC 6134
Bruntt H., Frandsen S., Kjeldsen H., Andersen M.I.
<Astron. Astrophys. Suppl. Ser. 140, 135 (1999)>
=1999A&AS..140..135B 1999A&AS..140..135B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, uvby, beta
Keywords: techniques: photometric -
open clusters and associations: individual: NGC 6134, NGC 3680 -
δ Sct
Description:
The tables give the results of the Stromgren photometry of the two
southern open clusters NGC 6134 and NGC 3680, which were not printed
in the paper in A&AS.
Objects:
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RA (2000) DE Designation(s) (File)
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16 27 42 -49 09.0 NGC 6134 (ngc6134.fit)
11 25 42 -43 15.0 NGC 3680 (ngc3680.fit)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ngc6134a.dat 103 606 Photometry of NGC 6134 incl. previous results
ngc6134u.dat 121 606 Photometry (incl. errors) of NGC 6134
ngc6134.fit 2880 2379 NGC 6134 finding chart
ngc3680a.dat 129 169 Photometry of NGC 3680 incl. previous results
ngc3680u.dat 100 164 Photometry (incl. errors) of NGC 3680
ngc3680.fit 2880 2379 NGC 3680 finding chart
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Byte-by-byte Description of file: ngc6134a.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID11 [4/1518]+ Star ID
5 A1 --- n_ID11 [*] Note on Star (1)
7- 9 I3 --- ID12 ?=0 Star ID by Frandsen et al. / Viskum (2)
12- 17 F6.3 mag V(BR) V magnitude (BR = Bruntt et al.)
20- 25 F6.3 mag V(VI) ?=-9.99 V magnitude by Viskum (2)
28- 33 F6.3 mag b-y(BR) Stromgren b-y colour
36- 41 F6.3 mag B-V(BR) ?=-9.99 B-V mag, not measured (3)
44- 49 F6.3 mag B-V(VI) ?=-9.99 B-V mag, measured by Viskum (2)
52- 57 F6.3 mag m1(BR) ?=-9.99 m1 index
60- 65 F6.3 mag Hb(BR) ?=-9.99 Hbeta index
68- 73 F6.3 mag c0(BR) ?=-9.99 c0 index (4)
76- 81 F6.3 mag E(b-y) ?=-9.99 Interstellar reddening
84- 90 F7.2 pix xpos x coordinate in reference frame (5)
93- 99 F7.2 pix ypos y coordinate in reference frame (5)
101-103 I3 pix dist Distance in pixels to closest star (5)
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Note (1): Interesting objects are the delta scuti stars, star numbers (ID11):
508, 574, 616, 679, 853, 906. Blue straggler: 647.
And the possible Am stars: 832, 919, 619, 703, 598, 279, 410,
1023, 218, 669, 1154, 689.
Star no. 92 also has a high m0 value but is clearly not a cluster
member, based on its location in the CMD.
Note (2): Frandsen et al., 1996A&A...308..132F 1996A&A...308..132F and Viskum, M. (Master thesis,
University of Aarhus, 1994).
Note (3): B-V(BR) was not measured by Bruntt. It was obtained from a linear
transformation of the measured b-y to the measurements in B-V by
Viskum (Master thesis, see above).
Note (4): c0(BR). The c0 index was not measured, as the CCD was not sensitive in
the u filter. It was interpolated by using the expression including
the f-factor in Nissen (1988A&A..199..146N). These values are crude
estimates.
Note that c0 is the extinction corrected c_1 index.
Note (5): The pixel scale is 0.389"/pixel. Positions in J2000 for six known
delta scuti stars is given in Frandsen et al. (1996A&A..308..132F)
I quote.
Their results here:
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ID11 ID12 RA (J2000) DE
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906 9 16 27 48.77 -49 10 43.8
679 87 16 27 40.04 -49 10 25.4
616 159 16 27 39.87 -49 09 41.1
853 161 16 27 51.49 -49 07 33.8
574 348 16 27 49.16 -49 06 43.7
508 397 16 27 43.14 -49 07 24.1
------------------------------------
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Byte-by-byte Description of file: ngc6134u.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID11 [4/1518]+ Star ID
7- 9 I3 --- ID12 ?=0 Star ID by Frandsen et al./Viskum (1)
12- 17 F6.3 mag Vmag V magnitude
20- 25 F6.3 mag e_Vmag Standard deviation of Vmag
28- 33 F6.3 mag b-y Stromgren b-y colour
36- 41 F6.3 mag e_b-y ?=-9.99 Standard deviation of b-y
44- 49 F6.3 mag m1 ?=-9.99 m1 index
52- 57 F6.3 mag e_m1 ?=-9.99 Standard deviation of m1
60- 65 F6.3 mag Beta ?=-9.99 Hbeta index
68- 73 F6.3 mag e_Beta ?=-9.99 Standard deviation of Beta
76- 81 F6.3 mag c0 ?=-9.99 Estimate of c0 index (2)
84- 89 F6.3 mag E(b-y) ?=-9.99 Interstellar reddening.
92- 97 F6.3 mag e_E(b-y) ?=-9.99 Standard deviation of E(b-y)
100-103 I4 K Teff ?=-999 Estimated Teff (3)
106-109 I4 K e_Teff ?=-999 Standard error on Teff (3)
111-115 F5.2 [Sun] [Fe/H] ?=-9.99 Metallicity.
117-121 F5.2 [Sun] e_[Fe/H] ?=-9.99 Standard error on [Fe/H].
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Note (1): Frandsen et al., 1996A&A...308..132F 1996A&A...308..132F and Viskum, M. (Master thesis,
University of Aarhus, 1994).
Note (2): The c0 index was not measured, as the CCD was not sensitive in
the u filter. It was interpolated by using the expression including
the f-factor in Nissen (1988A&A...199..146N 1988A&A...199..146N). These values are crude
estimates.
Note that c0 is the extinction corrected c1 index.
Note (3): Teff calibration from Alonso et al. (1996A&A...313..873A 1996A&A...313..873A)
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Byte-by-byte Description of file: ngc3680a.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID21 Star ID
4 A1 --- n_ID21 [*] Note on Star (1)
5- 8 I4 --- ID22 ?=0 Star ID by Nordstrom et al. (2)
10- 15 F6.3 mag V(BR) ?=-9.99 V magnitude (BR = Bruntt et al.)
17- 22 F6.3 mag V(NO) ?=-9.99 V magnitude by Nordstrom. (2)
24- 29 F6.3 mag V(TW) ?=-9.99 V magnitude by Twarog et al. (3)
31- 36 F6.3 mag V(NI) ?=-9.99 V magnitude by Nissen. (4)
38- 43 F6.3 mag b-y(BR) ?=-9.99 b-y index
45- 50 F6.3 mag b-y(NO) ?=-9.99 b-y index by Nordstrom. (2)
52- 57 F6.3 mag b-y(TW) ?=-9.99 b-y index by Twarog et al. (3)
59- 64 F6.3 mag b-y(NI) ?=-9.99 b-y index by Nissen. (4)
66- 71 F6.3 mag c1(TW) ?=-9.99 c_1 index by Twarog et al. (3)
73- 78 F6.3 mag c1(NI) ?=-9.99 c_1 index by Nissen. (4)
80- 85 F6.3 mag m1(BR) ?=-9.99 m_1 index
87- 92 F6.3 mag m1(TW) ?=-9.99 m_1 index by Twarog et al. (3)
94- 99 F6.3 mag m1(NI) ?=-9.99 m_1 index by Nissen. (4)
101-106 F6.3 mag Hb(BR) ?=-9.99 H_beta index
108-113 F6.3 mag Hb(NI) ?=-9.99 H_beta index by Nissen. (4)
115-121 F7.2 pix xpos x coordinate in reference frame. (5)
123-129 F7.2 pix ypos y coordinate in reference frame. (5)
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Note (1): Stars that are single cluster members according to Nordstrom et al.,
1997A&A..322..460, have star ID21 = 10, 11,13,45,51,58,73,95,109,112,
125,165,191,193.
Note (2): Nordstrom et. al, 1997A&A...322..460N 1997A&A...322..460N, and Nordstrom et al.,
1996, Cat. J/A+AS/118/407. Note that Nordstrom's ID for stars
21A, 25A, 46A etc. is 121, 125 and 146 in the table presented here.
Note (3): Twarog et al., 1989AJ.....98.1634A 1989AJ.....98.1634A
Note (4): Nissen, 1988A&A...199..146N 1988A&A...199..146N
Note (5): The pixel scale is 0.389"/pixel. Positions in J2000 can be found in
Nordstrom et al. 1996, Cat. J/A+AS/118/407.
I give five examples:
-----------------------------------
ID21 ID22 RA (J2000) DE
-----------------------------------
109 15 11 25 18.2 -43 11 49.9
114 33 11 25 36.0 -43 14 06.2
171 2098 11 25 47.0 -43 18 49.5
193 6 11 25 20.3 -43 17 32.2
139 4015 11 25 11.3 -43 13 10.5
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Byte-by-byte Description of file: ngc3680u.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID21 Star ID
5- 8 I4 --- ID22 Star ID by Nordstrom et al. (1)
11- 16 F6.3 mag Vmag V magnitude
19- 24 F6.3 mag e_Vmag Standard deviation of Vmag
27- 32 F6.3 mag b-y Stromgren b-y colour
35- 40 F6.3 mag e_b-y Standard deviation of b-y
43- 48 F6.3 mag m1 ?=-9.99 m1 index
51- 56 F6.3 mag e_m1 ?=-9.99 Standard deviation of m1
59- 64 F6.3 mag Beta ?=-9.99 H_beta index
67- 72 F6.3 mag e_Beta ?=-9.99 Standard deviation of Beta
75- 80 F6.3 mag E(b-y) ?=-9.99 Interstellar reddening
83- 88 F6.3 mag e_E(b-y) ?=-9.99 Standard deviation of E(b-y)
90- 94 F5.2 [Sun] [Fe/H] ?=-9.99 Metallicity
96-100 F5.2 [Sun] e_[Fe/H] ?=-9.99 Standard error on [Fe/H]
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Note (1): ID numbers in Nordstrom et. al, 1997A&A..322..460N
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(End) Hans Bruntt [Aarhus Obs., Denmark] 7-Jun-1999