The DDO photometric system
Basic Reference
McClure R.D. 1976, AJ 81, 182
Abstract
Extensive photometry for 285 stars to be used as photometric standards
has been completed on the David Dunlap Observatory (DDO) system. The
magnitudes and colors given in Table IV define the standard system. Most
of the northern stars originally observed by McClure and van den Bergh
(1968, AJ 73, 313) are included in the list; however, a large number of
stars at declination within 10d of the equator were added. This addition
results in a list of 151 standards in the equatorial zone that can be used at
southern hemisphere observatories. The matching of filter sets to the DDO system
is discussed.
Content
- 106 references
- 9426 stars
Access to the data and references
Asiago Database on Photometric System (ADPS)
Indices and Parameters
V48, C48-51, C45-48, C42-45, C41-42, C38-41, C35-38
Filters
Peak
Filter Name wavelength Width
[Å] [Å]
35 : 8 mm Schott UG11 + 1 mm Schott WG345 3460 383
38 : 5 mm Corning 7-51 + 2 mm Schott GG375 3815 330
41 : Interference 4166 83
42 : Interference 4257 73
45 : Interference 4517 76
48 : Interference 4886 186
Photomultiplier
RCA 1P21
Calibrations
Several calibrations have been published.
Please, send your
commentsto epaunzen@physics.muni.cz
epaunzen@physics.muni.cz
Last update: 13 September 2002