J/AJ/133/2883 Variable stars in original CTI-I survey (Wetterer+, 2007)
Variable stars in the original CCD/Transit instrument survey.
Wetterer C.J., McGraw J.T.
<Astron. J., 133, 2883-2891 (2007)>
=2007AJ....133.2883W 2007AJ....133.2883W
ADC_Keywords: Surveys ; Stars, variable ; Photometry
Keywords: catalogs - stars: variables: other
Abstract:
The existing CCD/Transit Instrument (CTI-I) survey database was
searched for variable stars with 12<V<18.5. This magnitude range
corresponds to the saturation limit and the practical faint limit of
the original survey (1987-1992). The CTI-I imaged a strip of the sky
with a narrow spread of declination over all right ascensions. The
resulting survey area covers a large range of both Galactic latitude
and longitude, and includes approximately 50deg2. Numerous challenges
created by the automated photometry pipeline and associated solutions
to these problems implemented during the variable suspect selection
process are described. The final list contains 1807 stars. Details and
the photometry of each are provided to facilitate selection for
follow-up observations and subsequent analysis. Known variable stars
listed in the General Catalog of Variable Stars are identified, and
follow-up observations at the US Air Force Academy Observatory of
selected brighter suspects (V<15) previously not identified as
variable are also described.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 64 1807 CTI-I variable suspect list
table5.dat 33 63680 *CTI-I variable suspect list photometry
table6.dat 77 82 GCVS Stars in Variable Suspect List
table7.dat 95 61 Previously Unknown Variable Stars with V<15 and
observed at AFA (Air Force Academy observatory)
notes.dat 119 24 Notes from table7
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Note on table5.dat: For all stars in table4 excepted [WM2007] 1756.
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2009)
II/219 : New Catalogue of Suspected Var. Stars Supp. (Kazarovets+ 1998)
II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+ 2002-05)
J/AJ/112/742 : Search for RR Lyrae Variables (Wetterer+ 1996)
J/AJ/119/1901 : ROTSE all-sky surveys for variable stars (Akerlof+, 2000)
J/AJ/128/2965 : Red variables in the NSVS (Williams+, 2004)
J/AJ/131/621 : A catalog of 1022 bright contact binary stars (Gettel+, 2006)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [WM2007] Running identification number
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 15 F4.1 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 25 I2 arcsec DEs Arcsecond of Declination (J2000)
27- 31 F5.2 mag Vmag Average V band CTI instrumental magnitude
33- 36 F4.2 mag dV1 The search 1 V band amplitude
38- 41 F4.2 mag dV2 The search 2 V band amplitude
43- 47 F5.2 mag B-V ? The (B-V) color index (G1)
49 A1 --- Var [PLR] Type of variability (G2)
50 I1 --- Qual [1/3] Quality of the light curve (G3)
51- 54 A4 --- Sel [acmp ] Selection limit (G4)
56- 64 A9 --- Com Additional comments
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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 --- [WM2007] Running identification number
6- 18 F13.5 d JD Julian Date
20- 25 F6.3 mag mag The CTI instrumental B or V magnitude
27- 31 F5.3 mag e_mag The 1σ error in mag
33 A1 --- Filt [BV] Filter used
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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- 4 I4 --- [WM2007] ? Running identification number
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 15 F4.1 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 25 I2 arcsec DEs Arcsecond of Declination (J2000)
27- 31 F5.2 mag Vmag Average V band CTI instrumental magnitude
33- 36 F4.2 mag dV ? The search V band amplitude
38- 42 F5.2 mag B-V ? The (B-V) color index (G1)
44 A1 --- Var [PLR] Type of variability (G2)
45 I1 --- Qual [1/3]? Quality of the light curve (G3)
46- 47 A2 --- Sel [acmp ] Selection limit (G4)
49- 57 A9 --- GCVS Name in General Catalog of Variable Stars
59- 66 A8 --- Vtype Variable type from GCVS (Cat. B/gcvs)
68- 77 A10 --- Notes Other classifications and references (5)
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Note (5): Reference numbers are:
1 = Wetterer et al., 1996, Cat. J/AJ/112/742
2 = Polsgrove et al., 2006IBVS.5710....1P 2006IBVS.5710....1P
3 = Wetterer et al., 1996IBVS.4353....1W 1996IBVS.4353....1W
4 = Wetterer, 1998IBVS.4631....1W 1998IBVS.4631....1W
5 = Wetterer & Majcen, 2004IBVS.5515....1W 2004IBVS.5515....1W
6 = Wetterer et al., 2004IBVS.5547....1W 2004IBVS.5547....1W
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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 --- [WM2007] Running identification number
5- 6 A2 --- n_[WM2007] [abcdf ] Note, detailed in "notes.dat" file
8- 9 I2 h RAh Hour of Right Ascension (J2000)
11- 12 I2 min RAm Minute of Right Ascension (J2000)
14- 17 F4.1 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- Sign of Declination (J2000)
20- 21 I2 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 27 I2 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.2 mag Vmag Average V band CTI instrumental magnitude
34 A1 --- n_Vmag [eh] Note on Vmag, details in "notes.dat"
36- 39 F4.2 mag dV ? The search V band amplitude
41- 45 F5.2 mag B-V ? The (B-V) color index (G1)
47 A1 --- Var [PLR] Type of variability (G2)
48 I1 --- Qual [1/3]? Quality of the light curve (G3)
49- 50 A2 --- Sel [acmp ] Selection limit (G4)
52- 57 A6 --- Vtype Variable type
58 A1 --- n_Vtype [gi] Note on Vtype, details in "notes.dat"
60- 70 F11.7 d Per ? Period
72- 75 I4 10-7d e_Per ? rms uncertainty on Per
77 A1 --- u_Per Uncertainty flag on Per
79- 89 F11.3 d T0 ? JD epoch of minimum
91- 93 I3 10-3d e_T0 ? rms uncertainty on T0
95 A1 --- u_T0 Uncertainty flag on T0
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [WM2007] Running identification number
6-119 A114 --- Text Text of note
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Global Notes:
Note (G1): Calculated from nights in CTI survey where both the B and V
filters observed simultaneously.
Note (G2): Type of variability as follows:
P = recognizable periodicity
L = long-term non-periodic behavior (magnitude between observations
does not change by more that 25% of the observed amplitude per day)
R = random non-periodic behavior (no clear periodicity or noticeable
long-term behavior)
Note (G3): Quality of the light curve as follows:
1 = clear variability and well distributed magnitudes
2 = good distribution of magnitudes
3 = suspicious variability showing a poor distribution of magnitudes
Note (G4): Selection limit as follows:
a = amplitude limit
c = correlation limit
m = faint magnitude limit
p = proximity limit
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History:
* 31-May-2009: from electronic version of the journal
* 08-Sep-2009: Notes added.
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-May-2009