NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T14:50:32 PDT
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You have selected the following parameters to search on:

Parameters for Distances and Cosmology: Ho= 73.0; Ωmatter = 0.27; Ωvacuum = 0.73;
Derived Quantities use a Redshift corrected to a Reference Frame defined by the 3K CMB

NED results for object 87GB[BWE91] 2017+1634


1 objects found in NED.    

SOURCE LIST

 Row          Object Name                 EquJ2000.0       Object  Velocity/Redshift    Mag./  Separ.               Number of                                 Row 
 No.     (* => Essential Note)       RA               DEC  Type     km/s       z   Qual Filter arcmin Refs Notes Phot Posn Vel/z Diam Assoc Images   Spectra  No. 
1    IC 4997                        20h20m08.8s +16d43m54s PN        ...       ...       ...     ...    10     1   10    4     0    0     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - IC 4997

INDEX for IC 4997
Essential Data (jump to sub-section of this query report):

   Essential Note    
   Cross-IDs    
   Coordinates    
   Basic Data   
   Redshift-Independent Distances
   Quick-Look Photometry and Luminosities
   Classifications
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):

Images
   
10 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
10 Reference(s)   
4 Position data point(s)
1 Note(s)   

ESSENTIAL NOTE for IC 4997 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for IC 4997 (Back to INDEX)
Object Names Type Object Names Type
IC 4997PN 87GB 201751.1+163413 RadioS
QV Sge !V* 87GB[BWE91] 2017+1634 RadioS
GALEXASC J202008.72+164356.7 UvS NVSS J202008+164353 RadioS
IRAS 20178+1634 IrS PN G058.3-10.9 PN
IRAS 20178+1634 ID !PN [HRT2007] J202008+164347 RadioS
AKARI J2020083+164356 IrS    

COORDINATES for IC 4997 (Back to INDEX)

Position Reference:1998ApJS..117..361C

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  304.464333   16.572978  20h17m51.44s  +16d34m22.7s  2.50E+00  2.50E+00    0
Equatorial (J2000.0)  305.036667   16.731667  20h20m08.80s  +16d43m54.0s  2.50E+00  2.50E+00    0
Ecliptic   (B1950.0)  311.572471   35.176916                              2.50E+00  2.50E+00    0
Ecliptic   (J2000.0)  312.267763   35.172422                              2.50E+00  2.50E+00    0
Galactic               58.329834  -10.978964                              2.50E+00  2.50E+00    0
SuperGalactic         302.286892   69.548702                              2.50E+00  2.50E+00    0
Additional detailed measurements with references are also available by clicking below:
4 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for IC 4997 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for IC 4997 (Back to INDEX)
 N/A 

FOREGROUND GALACTIC EXTINCTION for IC 4997 (Back to INDEX)
Galactic Extinction from the Schlafly & Finkbeiner 2011, Appendix; 2011ApJ...737..103S (SF11) recalibration 
of the Schlegel, Finkbeiner & Davis 1998, Appendix B; 1998ApJ...500..525S (SFD98) infrared-based dust map.
The map is based on dust emission from COBE/DIRBE and IRAS/ISSA;
the recalibration assumes a Fitzpatrick (1999PASP..111...63F) reddening law with Rv = 3.1 and different source spectrum than SFD98.

L a n d o l tS D S SU K I R T
Filter [µm]U (0.35)B (0.43)V (0.54)R (0.64)I (0.80)u (0.36)g (0.47)r (0.62)i (0.75)z (0.89)J (1.25)H (1.66)K (2.19)L' (3.78)
Aλ [mag]0.5850.4900.3700.2930.2030.5730.4460.3090.2290.1710.0960.0610.0410.021
Show/Hide Aλ magnitudes in all 88 photometric bands based on SF11
For completeness, we include the original SFD98 values:
L a n d o l tS D S SU K I R T
Filter [µm]U (0.34)B (0.44)V (0.54)R (0.65)I (0.81)u (0.35)g (0.49)r (0.63)i (0.78)z (0.93)J (1.27)H (1.67)K (2.22)L' (3.81)
Aλ [mag]0.7570.6010.4620.3720.2700.7180.5280.3830.2910.2060.1260.0800.0510.021


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.710 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for IC 4997 (Back to INDEX)

Description                :                     
Magnitude and Filter       :      
Major Diameter             :      
Minor Diameter             :      

NOTE: This information is indicative only. With the exception of the
      redshift they are unreferenced and highly inhomogeneous as to
      their origin. The Radial Velocity (when available) is computed
      from the listed redshift. The remaining values are designed to
      orient the user with a quick-look, overall assessment of the
      general properties of the object in question. They are not
      averages nor are they standardized in any way.
Additional detailed measurements with references are also available by clicking below:
10 photometric data point(s)      

QUICK-LOOK PHOTOMETRY and LUMINOSITIES for IC 4997 (Back to INDEX)
 N/A 

EXTERNAL ARCHIVES AND SERVICES for IC 4997 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- IC 4997SIMBAD (CDS, Strasbourg, France)
IRAS Point Source Catalog -- IRAS 20178+1634 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
NRAO/VLA Sky Survey (NVSS)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- IC 4997GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- IC 4997NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 20h20m08.8s, +16d43m54s (J2000)Site/Service
Query Optical and UV Mission Archives (Default search radius)Multimission Archive at STScI (MAST)
Query High Energy Mission Archives (Default search radius)HEASARC (NASA/GSFC)
Query IRSA for WISE images (10 arcmin search radius)NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
NASA/IPAC Infrared Science Archive (IRSA)
 Size:    Contours (PS)  JPEG  FITS File 
NRAO/VLA Sky Survey (NVSS)
The NRAO Data Archive System

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