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NED - NASA/IPAC Extragalactic Database
_A_d_d_r_e_s_s:
NED c/o IPAC
MS 100-22
California Institute of Technology
Pasadena, CA 91125
_E_m_a_i_l: ned@ipac.caltech.edu
_P_h_o_n_e: (818) 397-9503
_D_e_s_c_r_i_p_t_i_o_n
The NASA/IPAC Extragalactic Database (NED) is an ongoing
project to organize a broad range of published extragalactic
data into a computer-based central archive designed for fast
and flexible query via electronic networks.
The June 1992 version of NED provides positions, names, and
basic data for more than 200,000 extragalactic objects, as
well as related bibliographic references and notes from
catalogs and other publications. It forwards to the user,
upon request, files containing the data retrieved during a
session. It also allows users to view the contents of some
major catalogs and to browse the abstracts of recent arti-
cles of extragalactic interest from several major journals
(including A&A, AJ, ApJ, IAU Circulars, MNRAS, PASP, their
Letters and Supplements). The current release also intro-
duces the capability of searches filtered by object types
(e.g. find galaxies only, or exclude infrared sources), and
provides the first phase of detailed data collection from
catalogs and the literature.
NED is an object-oriented database, meaning that all infor-
mation is organized around a master list of astronomical
objects (such as galaxies, groups of galaxies, quasars and
radio sources) obtained from detailed cross-identifications
among some thirty major catalogs. Additional catalogs are
being folded in continually. Objects can be selected by
_________________________
The information in this section is provided in accor-
dance with the copyright notice appearing at the front
of this guide.
August 5, 1992 NNSC Section 3.21, Page 1
name (a high-level name interpreter is built into the inter-
face), or by vicinity, either to a named object, or to a
position on the sky.
_N_e_t_w_o_r_k _A_c_c_e_s_s
You may access the NED service over Internet, provided you
have a VT100 terminal or VT100 emulation software.
On Internet, a connection to IPAC may be set up with the
command: "telnet ned.ipac.caltech.edu"
Once you are connected to IPAC and prompted for a login,
respond with: "NED"
No password is needed. From this point, the system is
self-documenting, especially through the Help utilities and
the "control-h" key sequence. First-time users may want to
read the Tutorial in the first screen presented by the
interface.
_W_h_o _C_a_n _U_s_e _t_h_e _R_e_s_o_u_r_c_e
Available at no charge to the international astronomical
community.
_M_i_s_c_e_l_l_a_n_e_o_u_s
This work is carried out by the Jet Propulsion Laboratory,
California Institute of Technology, under contract with the
National Aeronautics and Space Administration (Astrophysics
Division, Science Operations Branch).
George Helou (818) 584-2928
Barry Madore (818) 584-2912
Marion Schmitz (818) 584-2994
Harold Corwin (818) 584-2937
August 5, 1992 NNSC Section 3.21, Page 2