J/AJ/151/7 Globular and open clusters observed by SDSS/SEGUE (Morrison+, 2016)
Globular and open clusters observed by SDSS/SEGUE: the giant stars.
Morrison H.L., Ma Z., Clem J.L., An D., Connor T., Schechtman-Rook A.,
Casagrande L., Rockosi C., Yanny B., Harding P., Beers T.C., Johnson J.A.,
Schneider D.P.
<Astron. J., 151, 7 (2016)>
=2016AJ....151....7M 2016AJ....151....7M (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Clusters, globular ; Clusters, open ; Stars, giant ;
Photometry, SDSS ; Radial velocities ; Reddening
Keywords: globular clusters: general - open clusters and associations: general
Abstract:
We present griz observations for the clusters M92, M13 and NGC 6791
and gr photometry for M71, Be 29 and NGC 7789. In addition we present
new membership identifications for all these clusters, which have been
observed spectroscopically as calibrators for the Sloan Digital Sky
Survey (SDSS)/SEGUE survey; this paper focuses in particular on the
red giant branch stars in the clusters. In a number of cases, these
giants were too bright to be observed in the normal SDSS survey
operations, and we describe the procedure used to obtain spectra for
these stars. For M71, we also present a new variable reddening map and
a new fiducial for the gr giant branch. For NGC 7789, we derived a
transformation from Teff to g-r for giants of near solar abundance,
using IRFM Teff measures of stars with good ugriz and 2MASS
photometry and SEGUE spectra. The result of our analysis is a robust
list of known cluster members with correctly dereddened and (if
needed) transformed gr photometry for crucial calibration efforts for
SDSS and SEGUE.
Description:
The SEGUE project observed a number of globular and open clusters for
calibration purposes. For calibration of the red giants, we selected
the globular clusters M92, M13 and M71 (spanning metallicities from
-2.4 to -0.8) and the open clusters Be 29, NGC 7789 and NGC 6791,
whose [Fe/H] values range from -0.4 to +0.4. In all but one case,
the clusters are within the SDSS footprint and so ugriz photometry is
available for the cluster stars. The SDSS cluster images were analyzed
using DAOPHOT (Stetson 1987PASP...99..191S 1987PASP...99..191S) by An et al.
(2008ApJS..179..326A 2008ApJS..179..326A) because the SDSS photometric pipeline was not
designed to handle crowded fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 73 6 Cluster Properties
table3.dat 77 79 M92 Members Observed by SEGUE
table4.dat 77 145 M13 Members Observed by SEGUE
table5.dat 61 10 Variable Reddening Values (in E(B-V)) for M71
table6.dat 107 9 M71 Members Observed by SEGUE
table7.dat 61 15 NGC 7789 Members Observed by SEGUE
table8.dat 77 67 NGC 6791 Members Observed by SEGUE
table9.dat 107 10 Berkeley 29 Members Observed by SEGUE
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See also:
II/248 : UBV photometry and proper motions in M13 (Kadla, 1966)
VII/195 : Globular Clusters in the Milky Way (Harris, 1996)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
J/A+A/312/74 : Proper motion of M 92 (Tucholke+, 1996)
J/PASP/110/1172 : NGC 7789 radial velocities (Gim+, 1998)
J/PASP/110/1318 : NGC 7789 CCD VI photometry (Gim+, 1998)
J/A+AS/144/227 : BV photometry of M71 (Geffert+, 2000)
J/AJ/122/3219 : M3 and M13 CCD BV photometry (Rey+, 2001)
J/PASP/115/413 : BVI photometry in the open cluster NGC 6791 (Stetson+, 2003)
J/A+A/431/933 : Abundances of NGC 7789 evolved stars (Tautvaisiene+, 2005)
J/ApJ/638/1018 : Equivalent widths for giant stars in M13 and M71
(Yong+, 2006)
J/AJ/133/1041 : Velocities and CMT2 photometry in globular M92
(Drukier+, 2007)
J/A+A/488/943 : Abundances of giants in four Galactic clusters
(Sestito+, 2008)
J/AJ/137/4282 : Red giant stars in clusters. II. M13 and M92
(Meszaros+, 2009)
J/A+A/525/A2 : Eclipsing binaries in NGC6791 (Brogaard+, 2011)
J/A+A/534/A136 : Halo red giants from the SEGUE survey (Martell+, 2011)
J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)
J/AJ/142/59 : Chemical abundance in 10 open clusters (Jacobson+, 2011)
J/ApJ/754/L38 : Abundances and radial velocities of M13 giants
(Johnson+, 2012)
J/A+A/566/A58 : Radial velocities in M3, M13, and M92 (Kamann+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Cluster name
10- 17 A8 --- AName Cluster alternate name
19- 24 F6.2 deg GLON [56.74/197.95] Galactic longitude (1)
26- 31 F6.2 deg GLAT [-5.37/+40.91] Galactic latitude (1)
33- 36 F4.2 --- E(B-V) [0.02/0.28] Reddening
37 A1 --- n_E(B-V) [befil] Note on E(B-V) (2)
39- 43 F5.2 mag (m-M)0 [11.33/15.60] Distance modulus
44 A1 --- n_(m-M)0 [cegjl] Note on (m-M)0 (2)
46- 50 F5.2 [-] [Fe/H] [-2.38/+0.39] Metallicity
51 A1 --- n_[Fe/H] [dhkm] Note on [Fe/H] (2)
53- 73 A21 --- FileName Name of the table(s) containting data for
this cluster
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Note (1): The coordinates are based on the compilation of An et al.
(2008ApJS..179..326A 2008ApJS..179..326A) except for NGC 7789 and Berkeley 29.
Note (2): Note as follows:
b = Harris (1996, Cat. VII/195);
c = Carretta et al. (2000ApJ...533..215C 2000ApJ...533..215C); (m-M)0 derived from Hipparcos
(Perryman et al. 1997A&A...323L..49P 1997A&A...323L..49P) subdwarf fitting;
d = Kraft & Ivans (2003PASP..115..143K 2003PASP..115..143K); their globular cluster metallicity
scale is based on the FeII lines from high-resolution spectra of giants;
e = Grundahl et al. (2002A&A...395..481G 2002A&A...395..481G); (m-M)0 derived from Hipparcos
subdwarf fitting;
f = Carraro et al. (2004AJ....128.1676C 2004AJ....128.1676C);
g = Bragaglia et al. (2006AJ....131.1544B 2006AJ....131.1544B);
h = [Fe/H] is the average of the Carraro et al. (2004AJ....128.1676C 2004AJ....128.1676C) and
Sestito et al. (2008, J/A+A/488/943) values;
i = Bartasiute & Tautvaisiene (2004Ap&SS.294..225B 2004Ap&SS.294..225B);
j = Tautvaisiene et al. (2005, J/A+A/431/933);
k = Jacobson et al. (2011, J/AJ/142/59);
l = Brogaard (2011, J/A+A/525/A2); (m-M)0 is based on (m-M)V assuming
AV=3.1*E(B-V);
m = We averaged the [Fe/H] measurements of Peterson & Green
(1998ApJ...502L..39P 1998ApJ...502L..39P), Gratton et al. (2006ApJ...642..462G 2006ApJ...642..462G),
Carraro et al. (2006ApJ...643.1151C 2006ApJ...643.1151C) and Brogaard et al. (2011,
J/A+A/525/A2) (+0.40, +0.47, +0.39 and +0.29 respectively).
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Byte-by-byte Description of file: table3.dat table4.dat table8.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Plate [2174/2821] SDSS plate number
6- 10 I5 --- MJD [53521/54393] Modified Julian Date of SDSS
exposure
12- 14 I3 --- Fiber [116/621] SDSS fiber identifier
16- 21 F6.3 mag rmag [11.446/20.197] SDSS r-band magnitude
23- 27 F5.3 mag e_rmag [0.001/0.038] Uncertainty in rmag
29- 34 F6.3 mag g-r [-0.52/1.44] SDSS g-r color index
36- 41 F6.3 mag g-i [-0.859/1.938]? SDSS g-i color index
43- 48 F6.3 mag g-z [-1.232/2.484] SDSS g-z color index
50- 57 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
59- 65 F7.4 deg DEdeg Declination in decimal degrees (J2000)
67- 72 F6.1 km/s RV [-250.2/37.8346] SEGUE radial velocity
74 I1 --- Ref [1/2]? Photometry reference (not in table 8) (1)
76- 77 I2 % Prob [55/99]? Proper motion membership probability
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Note (1): Reference as follows:
1 = Clem et al. (2008AJ....135..682C 2008AJ....135..682C);
2 = An et al. (2008ApJS..179..326A 2008ApJS..179..326A).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 arcsec oDE [-225/225] Declination offset (1)
6- 9 F4.2 --- E(B-V)1 [0.02/0.07] Reddening value for a Right
Ascension offset of -225 arcsec (1)
11- 14 F4.2 --- E(B-V)2 [0.02/0.06] Reddening value for a Right
Ascension offset of -175 arcsec (1)
16- 19 F4.2 --- E(B-V)3 [0.00/0.08] Reddening value for a Right
Ascension offset of -125 arcsec (1)
21- 25 F5.2 --- E(B-V)4 [-0.02/0.05] Reddening value for a Right
Ascension offset of -75 arcsec (1)
27- 31 F5.2 --- E(B-V)5 [-0.02/0.02] Reddening value for a Right
Ascension offset of -25 arcsec (1)
33- 37 F5.2 --- E(B-V)6 [-0.02/0.00] Reddening value for a Right
Ascension offset of 25 arcsec (1)
39- 43 F5.2 --- E(B-V)7 [-0.02/0.00] Reddening value for a Right
Ascension offset of 75 arcsec (1)
45- 49 F5.2 --- E(B-V)8 [-0.01/0.01] Reddening value for a Right
Ascension offset of 125 arcsec (1)
51- 55 F5.2 --- E(B-V)9 [-0.01/0.02] Reddening value for a Right
Ascension offset of 175 arcsec (1)
57- 61 F5.2 --- E(B-V)10 [-0.01/0.03] Reddening value for a Right
Ascension offset of 225 arcsec (1)
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Note (1): Offsets from M71 center.
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Byte-by-byte Description of file: table6.dat table9.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Plate [2333/3335] SDSS plate number
6- 10 I5 --- MJD [53679/54922] Modified Julian Date of SDSS
exposure
12- 14 I3 --- Fiber [113/508] SDSS fiber identifier
16- 21 F6.3 mag gmag [16.799/19.288]? SDSS g-band magnitude
(only in table 9)
23- 27 F5.3 mag e_gmag [0.006/0.015]? Uncertainty in gmag
(only in table 9)
29- 34 F6.3 mag rmag [11.766/14.203]? SDSS r-band magnitude
(only in table 6)
36- 40 F5.3 mag e_rmag [0.002/0.004]? Uncertainty in rmag
(only in table 6)
42- 46 F5.3 mag g-r [0.597/1.488] SDSS g-r color index
48- 52 F5.3 mag e_g-r [0.004/0.021]? Uncertainty in g-r
54- 58 F5.2 --- E(B-V) [-0.02/0.05]? Reddening offset (only in table 6)
60- 67 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
69- 75 F7.4 deg DEdeg Declination in decimal degrees (J2000)
77- 82 F6.2 km/s RV [-26.7/39.85] SEGUE radial velocity (1)
84- 87 F4.2 km/s e_RV [0.2/2.8] Uncertainty in RV
89- 90 I2 % Prob [85/97]? Proper motion membership probability
(only in table 6)
92-107 A16 --- ID Star identifier (2)
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Note (1): Unpublished velocity of Pryor and collaborators in Table 6.
Note (2): Identifications are from Cudworth (1985AJ.....90...65C 1985AJ.....90...65C) in Table 6.
Identifications are from S: Sestito et al. (2008, J/A+A/488/943),
C: Carraro et al. (2004AJ....128.1676C 2004AJ....128.1676C) and F: Frinchaboy et al.
(2006AJ....131..922F 2006AJ....131..922F) in Table 9.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Plate [2377/2377] SDSS plate number
6- 10 I5 --- MJD [53991/53991] Modified Julian Date of SDSS
exposure
12- 14 I3 --- Fiber [151/515] SDSS fiber identifier
16- 21 F6.3 mag Vmag [11.986/13.26] V-band magnitude (1)
23- 27 F5.3 mag V-I [1.284/1.617] V-I color index (1)
29- 33 F5.3 mag (g-r)0 [0.73/1.109] (g-r)0 color index (2)
35- 42 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
44- 50 F7.4 deg DEdeg Declination in decimal degrees (J2000)
52- 55 F4.2 --- E(B-V) [0.24/0.27] Reddening value from
Bartasiute & Tautvaisiene (2004Ap&SS.294..225B 2004Ap&SS.294..225B)
57- 61 F5.1 km/s RV [-50.7/-44.4] SEGUE radial velocity
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Note (1): The V and I photometry are from Gim et al. (1998, J/PASP/110/1318).
Note (2): We used Equation (2) to calculate the value of (g-r)0 for each star:
(g-r)0=-0.3672-0.7188Q+2.281Q2-0.4688Q3.
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 06-Mar-2018