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II/230 TASS Mark III photometric survey (Richmond+, 2000)
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TASS Mark III photometric survey of the celestial equator
Richmond M.W., Droege T.F., Gombert G., Gutzwiller M., Henden A.A.,
Albertson C., Beser N., Molhant N., Johnson H.
<Publ. Astron. Soc. Pac. 112, 397 (2000)>
=2000PASP..112..397R
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ADC_Keywords: Surveys ; Photometry, CCD ; Photometry, VRI
Abstract:
The Amateur Sky Survey (TASS) is a loose confederation of amateur and
professional astronomers. We describe the design and construction of
our Mark III system, a set of wide-field drift-scan CCD cameras which
monitor the celestial equator down to 13th magnitude in several
passbands. We explain the methods by which images are gathered,
processed, and reduced into lists of stellar positions and magnitudes.
Over the period 1996 October to 1998 November, we compiled a large
database of photometric measurements. One of our results is the
tenxcat catalog, which contains measurements on the standard
Johnson-Cousins system for 367,241 stars; it contains links to the
light curves of these stars as well.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 132 367241 TASS tenxcat catalog
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See also:
http://stupendous.rit.edu/tass/tass.shtml : the TASS home page
I/263 : ACR catalog around Celestial Equator (Stone+, 1999)
II/183 : UBVRI Photometric Standards (Landolt 1992)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
I/247 : The AC2000 Catalogue (Urban+ 1997)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Identification of star in the Mark III
database (1)
17- 24 F8.4 deg RAdeg Right ascension of the star (J2000)
26- 33 F8.4 deg DEdeg Declination of the star (J2000)
35- 40 F6.3 mag Vmag ? Mean V-band magnitude of the star (2)
43- 47 F5.3 mag e_Vmag ? rms uncertainty on Vmag (3)
50- 51 I2 --- o_Vmag Number of measurements in the V-band
53- 58 F6.3 mag Rmag ? Mean R-band magnitude of the star (2)
61- 65 F5.3 mag e_Rmag ? rms uncertainty on Rmag (3)
68- 69 I2 --- o_Rmag Number of measurements in the R-band
71- 76 F6.3 mag Imag ? Mean I-band magnitude of the star (2)
79- 83 F5.3 mag e_Imag ? rms uncertainty on Imag (3)
86- 87 I2 --- o_Imag Number of measurements in the I-band
89 I1 --- flag1 [0/1] Raw flag indicator (4)
91 I1 --- flag2 [0/1] Flag for merged spurious pairs (5)
93 I1 --- flag3 [0/1] Flag for merged spurious pairs (5)
95 I1 --- --- [0] Not currently used.
97 I1 --- --- [0] Not currently used.
99 I1 --- --- [0] Not currently used.
102-108 I7 --- AC2000 ? ID of the matching star in the
Astrographic Catalogue 2000, Cat. <I/247>
110-115 I6 --- HD ? ID of the matching star in the HD Catalogue
Cat. <III/135>
118-120 A3 --- SpType Spectral type of the star, from HD catalogue
122-132 A11 --- IRAS Name of a matching source in the IRAS PSC
Cat. <II/125>
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Note (1): This name is usually the ID of the star in the GSC version 1.1
(Cat. <I/220>) when starting by GSC.
If there is no matching GSC star, a name based on J2000 position is
supplied; in order to make this last name into a real IAU
designation, one must add the prefix "TASS J", for example,
TASS J023553.2-020325
Note (2): This is the unweighted average of all valid magnitude
measurements of the star in the passband.
Note (3): the mean error is blank for a star with just 1 magnitude datum.
Note (4): if this flag is 1, his star's magnitude values are not
corrected for color terms (usually because it was not observed
in both V and I).
If this flag is 0, the star's magnitude has been corrected for
color terms.
Note (5): "spurious pairs" are non-existing pairs.
The pixel size of the Mark III images being about 14arcsec, detections
which fall within 15 arcsec of an existing entry should be merged in
the database.
flag2 is set to 1 when multiple entries of such "spurious pairs"
were effectively merged.
flag3 is set to 1 when multiple entries of such "spurious pairs"
could not be merged. The other member of the pair must also
appear in the catalog, and its entry will also have its
flag3 set to 1.
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Acknowledgements:
It is a pleasure to thank Michael Richmond, who gave an access to
the tenxcat catalogue.
History:
* Copied at http://www.tass-survey.org/tass/technotes/tn0056.html
in April 2000
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(End) James Marcout, Patricia Bauer, Francois Ochsenbein [CDS] 22-Jun-2000