NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-21 T07:45:34 PST
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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 CVn II dSph


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    CVn II dSph                    12h57m10.0s +34d19m15s G        -129 -0.000430      15.1V    ...    72     0    1    9     2    0     6 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - CVn II dSph

INDEX for CVn II dSph
Essential Data (jump to sub-section of this query report):

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

Images
   
1 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
72 Reference(s)   
9 Position data point(s)
2 Redshift data point(s)   
6 Association(s)   

ESSENTIAL NOTE for CVn II dSph (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for CVn II dSph (Back to INDEX)
Object Names Type Object Names Type
CVn II dSphG SDSS J1257+3419 G

COORDINATES for CVn II dSph (Back to INDEX)

Position Reference:2007ApJ...654..897B

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)   193.69718    34.59091   12h54m47.3s    +34d35m27s  3.00E+01  3.00E+01    0
Equatorial (J2000.0)   194.29167    34.32083   12h57m10.0s    +34d19m15s  3.00E+01  3.00E+01    0
Ecliptic   (B1950.0)   176.63378    36.75545                              3.00E+01  3.00E+01    0
Ecliptic   (J2000.0)   177.33717    36.75530                              3.00E+01  3.00E+01    0
Galactic               113.57858    82.70316                              3.00E+01  3.00E+01    0
SuperGalactic           83.23856     9.21359                              3.00E+01  3.00E+01    0
Additional detailed measurements with references are also available by clicking below:
9 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for CVn II dSph (Back to INDEX)

8 Distances found in NED View 8 Individual Distance Measurement(s) for CVn II dSph

Summary Statistics computed by NED from 8 Distance(s) in the literature:
NOTE: These summary statistics are provided for "quick-look" reference only;
they are based exclusively on original values, as published.
No homogenization or corrections have been applied.


CVn II dSph Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 20.90 0.153
Std. Dev. 0.11 0.005
Min. 20.70 0.145
Max. 21.02 0.160
Median 20.90 0.150

CLASSIFICATIONS (TYPES, ATTRIBUTES) for CVn II dSph (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Distance IndicatorRR LyraeRR Lyrae...2012ApJ...744...96O
7 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for CVn II dSph (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]0.0430.0360.0270.0210.0150.0420.0330.0230.0170.0130.0070.0040.0030.002
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]0.0540.0430.0330.0270.0190.0510.0380.0270.0210.0150.0090.0060.0040.002


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.000 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for CVn II dSph (Back to INDEX)
Helio. Radial Velocity     :      -129 km/s       
Redshift                   : -0.000430            2009ApJ...696..385G
Major Diameter (arcmin)    :      
Minor Diameter (arcmin)    :      
Magnitude and Filter       : 15.1V
Classifications            :                     

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:
2 Redshift data point(s)      1 photometric data point(s)      

QUANTITIES DERIVED FROM REDSHIFT(Details)
Calculated and Corrected Velocities
V (Heliocentric)           :    -129  km/s                2009ApJ...696..385G
V (Kinematic LSR)          :    -120  km/s                1986MNRAS.221.1023K
V (Galactocentric GSR)     :     -96 +/-      1 km/s      1991RC3.9.C...0000d
V (Local Group)            :    -113 +/-      1 km/s      1996AJ....111..794K
V (3K CMB)                 :     118 +/-     17 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :     -98 +/-      1 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    -106 +/-      2 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    -106 +/-      2 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/- 5 km/sec/Mpc)
D (Galactocentric GSR)     :     N/A   
D (Local Group)            :     N/A   
D (3K CMB)                 :    1.62 +/-   0.26 Mpc      (m-M) = 26.05 +/- 0.33 mag
D (Virgo Infall only)      :     N/A   
D (Virgo + GA only)        :     N/A   
D (Virgo + GA + Shapley)   :     N/A   

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     N/A 
Scale (Local Group)        :     N/A 
Scale (3K CMB)             :       8 pc/arcsec =  0.008 kpc/arcsec =   0.47 kpc/arcmin =   0.03 Mpc/degree
Scale (Virgo Infall only)  :     N/A 
Scale (Virgo + GA only)    :     N/A 
Scale(Virgo + GA + Shapley):     N/A 

To Search for Nearby Objects (Physical Companions): Enter Your Preferred Values and click on "Submit Environment Search" button
Search for Objects within +/-arcmin where 100 kpc = -236.088 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = -129 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.000395 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 1.62 Mpc (m-M) = 26.05 mag Angular-Size Distance : 1.62 Mpc (m-M) = 26.05 mag Co-Moving Radial Distance : 1.62 Mpc (m-M) = 26.05 mag Co-Moving Tangential Dist. : 1.62 Mpc (m-M) = 26.05 mag Co-Moving Volume : 1.78e-08 Gpc^3 Light Travel-Time : 0.005 Gyr Age at Redshift 0.000395 : 13.294 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 8 pc/arcsec = 0.008 kpc/arcsec = 0.47 kpc/arcmin = 0.03 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.99842; Magnitude per Unit Area = 0.001714 mag
To change Cosmological Input Parameters for Derived Quantities: Enter Your Preferred Values and click on "Submit Changed Hubble Parameters for this object" button
HoΩmatterΩvacuum     
Correct Redshift To the Reference Frame defined by: as Input for Calculation of the Distances and Cosmology-Corrected Quantities

QUICK-LOOK PHOTOMETRY and LUMINOSITIES for CVn II dSph (Back to INDEX)

The brightest flux in each of the following spectral regions, when available:
Gamma-Ray (ν > 2E19 Hz); X-Ray (2E19 Hz > ν > 2E16 Hz); Ultraviolet (2E16 Hz > ν > 9E14 Hz); Visual (9E14 Hz > ν > 3E14 Hz);
Near-Infrared (3E14 Hz > ν > 6E13 Hz); Mid-Infrared (6E13 Hz > ν > 7.5E12 Hz); Far-Infrared (7.5E12 Hz > ν > 1E12 Hz);
Sub-Millimeter (1E12 Hz > ν > 3E11 Hz); Millimeter (3E11 Hz > ν > 3E10 Hz); Radio (3E10 Hz > ν).

Spectral
Region
Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
VisualV 16.1 +/- 0.5 mag 2012AJ....144....4M-4.80 +/- 0.50 [mag] 5.21E+03 +/- 2.41E+03
NOTE: The above quantities are derived using an estimated Distance Modulus of (20.90 +/- 0.11) mag corresponding to
a Metric Distance of (0.153 +/- 0.005) Mpc using the Average NED-D value.
The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied.

View details and SED for 1 Photometric data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for CVn II dSph Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- CVn II dSphSIMBAD (CDS, Strasbourg, France)
version
SDSS Sky Server
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- CVn II dSphGALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- CVn II dSphNASA/IPAC Infrared Science Archive (IRSA)
Resources for position 12h57m10.0s, +34d19m15s (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)
Explore resources with DataScope (15 arcmin search radius)HEASARC (NASA/GSFC)
version
SDSS Sky Server
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)
    Size:     GIF     FITS File  
Faint Images of the Radio Sky at Twenty-Centimeters
The NRAO Data Archive System

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