Parameters

Select which parameters you want to examine:

• Object parameters (e.g. - 'P001', 'P002', etc. tables)
• POSS I Field parameters ('plates' table)
• Astrometric Fit Parameters ('astrom' table)
• Photometric Fit Parameters ('photom' table)
• Photometric Standards ('standards' table)
• POSS I scanned data removed from MAPS Catalog ('cuts' table)
• All the parameters in the MAPS Catalog database (list all of the above)

'standards' Table Parameters

The 'standards' database table stores information describing standard stars used to establish the 'stellar' magnitude photometric fits for each POSS I plate in the MAPS Catalog. The following parameters are stored for each photometric standard used in the MAPS Catalog:

Field Name	Definition
possfield	MAPS POSS I Field Name
possnumber	MAPS POSS I Field Number
objectname	The full MAPS Catalog object corresponding to this photometric standard when available. Otherwise, two other kinds of "names" may be provided: A "hyphen" means this standard was never used for photometric calibration. An entry in the form "Ostarnum" or "Estarnum" means that this was an "unrecovered" standard. A standard can be "unrecovered" because the photometric calibration occurs before the final matching between O and E plate images occurs. In some cases a standard was unmatched or the starnumber changed and the original standard could no longer be definatively identified.
standard	The names of the standards indicate where data was obtained. gsc: Guide Star Catalog cap: Capilla Peak CCD Photometry ctio: Cerro Tololo CCD Photometry kpno: Kitt Peak CCD Photometry maj: Majewski pre-publication CCD Photometry (only on P323) mcd: McDonald CCD Photometry
Vmag, Verr, BVmag, BVerr, VRmag, VRerr	The standards' V, B-V, and V-R magnitude/colors and their respective errors. Note that for Guide Star Catalog standards, the reported V-R magnitudes come from applying a transformation from V and B-V to B-R based on Landolt standards as described in Larsen (1996) and Larsen (2003).
night	The night the observation was made, if known
Odia, Edia	The "areal" diameter (in EREs) of this object from the O and E plate scans respectively (By "areal" diameter, we mean the diameter determined by taking the surface area of the scanned object in square EREs, and then computing the diameter of a circle with the same area.).
Omag, Emag	The O and E magnitudes of the objects, respectively, computed from B,V,R magnitudes using standard transformations. These are NOT necessarily the final magnitude recorded in the MAP Catalog.
Oerr, Eerr	The O and E magniude uncertainties, respectively.
Oresid, Eresid	The residuals of the O and E magnitudes, respectively, to the diameter-magnitude function fit.
used	Records whether the star was used in the final fit of the diameter-magnitude relation on both plates (OE), the O plate only (O), the E plate only (E), or neither (N).