NGC 1433-
(R
)SB(r)ab
This section includes sample atlas images of several individual galaxies to provide some of the flavor of what the actual atlas will be like. Some galaxies will have more discussion than others, and some will have more images displayed than others. This will depend on how much information an image contains, and how much interpretation we can make. The sample here emphasizes ringed galaxies because that is mostly what RB's image database contains. The final atlas will cover much more ground and will draw on other more general databases.
For each galaxy, the heading provides information on the telescope used, the observers who took the images, the wavelength band, exposure time, and image scale, and the range of surface brightnesses illustrated. For example, "17.0-27.0" for NGC 1433 means the the main B-band image displays surface brightnesses in the range 17.0 to 27.0 mag per square arcsecond. We also plan, where available, to list the bar torque class for each galaxy in the quantitative system developed by Buta and Block (2001). In this system, a bar torque class of 0 means a true nonbarred galaxy. The strongest bars are of class 6. The bar torque class is listed as "x" for cases where it has not yet been measured.
Finally, for each galaxy we list the types as published by de Vaucouleurs (1963=deV63), Sandage and Bedke (1994=SB94), Corwin et al. (1985=SGC), and Buta (1995=CSRG). SGC stands for "Southern Galaxy Catalogue" while CSRG stands for "Catalogue of Southern Ringed Galaxies."
Following the header information, we provide several categories of preliminary descriptive information concerning the basis of the de Vaucouleurs type and what multicolor information tells us, as well as some formal interpretations.
The color index maps displayed for several of these galaxies are coded such that relatively blue features (B-I < 1) are dark and red features (B-I > 2) are light. Thus, dust lanes tend to appear light and star-forming regions tend to appear dark in these maps.
The acronym "RHS" is also used as a shorthand for "de Vaucouleurs Revised Hubble System."