Table Description:
This table is available for ADQL queries and through the TAP endpoint.
Resource Description:
For a list of all services and tables belonging to this table's resource, see Information on resource 'CARS survey data'
This table has an associated publication. If you use data from it, it may be appropriate to reference 2009A&A...493.1197E (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.
To cite the table as such, we suggest the following BibTeX entry:
@MISC{vo:cars_srccat, year=2009, title={{CARS} survey data}, author={Erben, T. and Hildebrandt, H. and Lerchster, M. and Hudelot, P. and Benjamin, J. and van Waerbeke, L. and Schrabback, T. and Brimioulle, F. and Cordes, O. and Dietrich, J. P. and Holhjem, K. and Schirmer, M. and Schneider, P.}, url={https://dc.zah.uni-heidelberg.de/tableinfo/cars.srccat}, howpublished={{VO} resource provided by the {GAVO} Data Center} }
If you use the CARS products for your own research, please give proper acknowledgment to CADC, the CFHTLS project and the publication 2009A&A...493.1197E
These services deliver products from the CFHTLS-Archive-Research Survey (CARS). The survey currently offers derived products from 37 sq. degrees of the Wide part from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). The main documentation for the products, its creation and its content is the publication 2009A&A...493.1197E. Here, we discuss some points which are not evident from this publication.
For each 1 sq. deg. CARS pointing we currently offer the following products (we discuss them on the example of the CARS pointing W1m0p1); a typical file is named W1m0p1_izrgu.V1.7A.final.cat. The name contains the following information:
The individual files we offer are:
An ASCII ds9 region file containing saoimage/ds9 polygon entries (in pixel coordinates). They represent the CARS image masks described in Sect. 3.4 of 2009A&A...493.1197E. Polygons originating from different masking procedures are encoded with different colours (look at expressions such as '# color=yellow' at the end of each line). We offer this file so that interested users can construct own masks containing only parts of our global MASK key. (typical gzipped file size per field: 1MB)
The colour coding in these files is as follows:
W1m0p1_irg.V1.7A.truecol.jpg
low resolution true colour i', r' and g' JPG image of the CARS field. These images allow a quick look at the data but they are probably not suitable for high-quality poster print-outs. (typical file size per field: 10MB)
low resolution JPG image showing object positions and object masks overlayed on the i'-band image. It allows a quick-look at field-layout and object positions. (typical file size per field: 3MB)
The colour coding in this is:
See 2009A&A...493.1197E, in particular Sect. 4, and the SExtractor Users manual for a description of most catalogue entries. Also see the table notes.
Sorted alphabetically. [Sort by DB column index]
Name | Table Head | Description | Unit | UCD |
---|---|---|---|---|
badFilters | Bad | Filters with bad photometry for BPZ [Note 3] | N/A | N/A |
carsid | Id | CARS object ID | N/A | meta.id;meta.main |
dej2000 | Dec | Declination of barycenter (J2000) | deg | pos.eq.dec;meta.main |
extflags | Ext. Flags | Extraction Flags | N/A | N/A |
faintFilters | Faint | Filters with faint photometry for BPZ [Note 3] | N/A | N/A |
fieldKey | Field | CARS field designation | N/A | meta.id |
fluxRadius | Flux rad. | Fraction-of-light radius | pix | N/A |
fwhm | FWHM | Full width half max assuming a gaussian core | deg | phys.angSize |
goodFilters | Good | Filters with faint photometry for BPZ [Note 3] | N/A | N/A |
magaprErrG | Err. F.a. mag. g' | RMS error of fixed aperture magnitude in the g' band | mag | stat.error;phot.mag;em.opt |
magaprErrI | Err. F.a. mag. i' | RMS error of fixed aperture magnitude in the i' band | mag | stat.error;phot.mag;em.opt |
magaprErrR | Err. F.a. mag. r' | RMS error of fixed aperture magnitude in the r' band | mag | stat.error;phot.mag;em.opt |
magaprErrU | Err. F.a. mag. u* | RMS error of fixed aperture magnitude in the u* band | mag | stat.error;phot.mag;em.opt |
magaprErrZ | Err. F.a. mag. z' | RMS error of fixed aperture magnitude in the z' band | mag | stat.error;phot.mag;em.opt |
magaprG | F.a. mag. g' | Fixed aperture magnitude in the g' band [Note 1] | mag | phot.mag;em.opt |
magaprI | F.a. mag. i' | Fixed aperture magnitude in the i' band [Note 1] | mag | phot.mag;em.opt |
magaprR | F.a. mag. r' | Fixed aperture magnitude in the r' band [Note 1] | mag | phot.mag;em.opt |
magaprU | F.a. mag. u* | Fixed aperture magnitude in the u* band [Note 1] | mag | phot.mag;em.opt |
magaprZ | F.a. mag. z' | Fixed aperture magnitude in the z' band [Note 1] | mag | phot.mag;em.opt |
magAuto | Auto. mag. | Kron-like elliptical aperture magnitude [Note 1] | mag | phot.mag |
magErrAuto | Err. Auto. mag. | Error in Kron-like elliptical aperture magnitude | mag | stat.error;phot.mag |
magisoErrG | Err. iso. mag. g' | RMS error of isophotal magnitude in the g' band | mag | stat.error;phot.mag;em.opt |
magisoErrI | Err. iso. mag. i' | RMS error of isophotal magnitude in the i' band | mag | stat.error;phot.mag;em.opt |
magisoErrR | Err. iso. mag. r' | RMS error of isophotal magnitude in the r' band | mag | stat.error;phot.mag;em.opt |
magisoErrU | Err. iso. mag. u* | RMS error of isophotal magnitude in the u* band | mag | stat.error;phot.mag;em.opt |
magisoErrZ | Err. iso. mag. z' | RMS error of isophotal magnitude in the z' band | mag | stat.error;phot.mag;em.opt |
magisoG | Iso. mag. g' | Isophotal magnitude in the g' band [Note 1] | mag | phot.mag;em.opt |
magisoI | Iso. mag. i' | Isophotal magnitude in the i' band [Note 1] | mag | phot.mag;em.opt |
magisoR | Iso. mag. r' | Isophotal magnitude in the r' band [Note 1] | mag | phot.mag;em.opt |
magisoU | Iso. mag. u* | Isophotal magnitude in the u* band [Note 1] | mag | phot.mag;em.opt |
magisoZ | Iso. mag. z' | Isophotal magnitude in the z' band [Note 1] | mag | phot.mag;em.opt |
maglimG | Lim. mag. g' | Limiting magnitude at object's position in g' band [Note 4] | mag | N/A |
maglimI | Lim. mag. i' | Limiting magnitude at object's position in i' band [Note 4] | mag | N/A |
maglimR | Lim. mag. r' | Limiting magnitude at object's position in r' band [Note 4] | mag | N/A |
maglimU | Lim. mag. u* | Limiting magnitude at object's position in u* band [Note 4] | mag | N/A |
maglimZ | Lim. mag. z' | Limiting magnitude at object's position in z' band [Note 4] | mag | N/A |
majorAxis | RMS major | Profile RMS along major axis | deg | phys.angSize.smajAxis |
mask | In mask | True if object is within an object mask | N/A | meta.code |
minorAxis | RMS minor | Profile RMS along minor axis | deg | phys.angSize.sminAxis |
NbadFilters | #Bad | Number of filters with bad photometry for BPZ [Note 2] | N/A | meta.code.qual |
NfaintFilters | #Faint | Number of filters with faint photometry for BPZ [Note 2] | N/A | meta.code.qual |
NgoodFilters | #Good | Number of filters with good photometry for BPZ [Note 2] | N/A | meta.code.qual |
odds | z odds | Confidence parameter for photometric redshift | N/A | N/A |
raj2000 | RA | Right ascension of barycenter (J2000) | deg | pos.eq.ra;meta.main |
SeqNr | No | Running object number (in field) | N/A | meta.id |
sgclass | S/G | S/G classifier output (0..1) | N/A | src.class.starGalaxy |
t_b | T_B | Mask value | N/A | N/A |
theta | Pos. Ang. | Position angle (east of north) (J2000) | deg | pos.posAng |
xpos | X | Object position on exposure along x | pix | pos.cartesian.x;instr.det |
ypos | Y | Object position on exposure along y | pix | pos.cartesian.y;instr.det |
z_b | Z_B | Photometric redshift | N/A | N/A |
Columns that are parts of indices are marked like this.
The following services may use the data contained in this table:
VO nerds may sometimes need VOResource XML for this table.