M81 Group

Query : M81 Group

Basic data :
NAME M 81-82 Group -- Group of Galaxies
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		GrG (DV,GHCG,...)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		09 55 00.0 +69 06 00 [ ] E 2000ApJS..128..431F
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK5 coord. (ep=J2000 eq=2000) : 		09 55 00.0 +69 06 00 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		09 50 53.6 +69 20 12 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		142.0918 +40.8397 [ ]
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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sedIcon
within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!). sed-help-icon

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 30 		Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME M 81-82 Group NAME M 81 Group NAME M81 Galaxy Group [KT79] B2
DV 2 NAME M81 Group NBGG 14-10 [N93] 40
GHCG 52 NAME NGC 3031 Group [FWB89] GrG 299 [R88] 27

References (112 between 2019 and 2024) (Total 717)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Observing logs


herschel : 8   

   

Warning : measurements from IRAS, IRC, SAO, CL.g (ACO), GJ have been removed
(they are still available using the icon Vizier near the identifier of the catalogue, or at the bottom of the page in the section "External links" to get the full data)

herschel (8)

The 1 column in color are computed by VizieR, and are not part of the original data.

Note: (see also the postcard server)

VI/139/herschel
Post annotation 		Herschel Observation Log (Herschel Science Centre, 2013) [ReadMe+ftp]
2013yCat.6139....0H

The Herschel Observation Log (37093 rows)		img(gal)
start AladinLite 
 Full      _r     OD   Target                                 RAJ2000      DEJ2000    Proposal           AOT                 Dur          Start            ObsId       PACS        HIFI        SPIRE    Label                                                                                                                 
        arcmin                                               "h:m:s"      "d:m:s"                                            s             s                                                                                                                                                                                 


    1  14.3948  1424  M81grouppos11-1                      09 53 08.30  +69 15 17.6  OT2_mlehnert_2     PacsLineSpec        6874  2013-04-07T03:44:31  1342269465  get Herschel/PACS observation #1342269465                           PSpecL-10  -copy                                                                                                      
    2  14.3948  1424  M81grouppos11-1                      09 53 08.30  +69 15 17.6  OT2_mlehnert_2     PacsLineSpec        6874  2013-04-07T01:47:48  1342269464  get Herschel/PACS observation #1342269464                           PSpecL-10                                                                                                             
    3  18.0413  1424  M81grouppos13-1                      09 57 24.60  +69 19 40.7  OT2_mlehnert_2     PacsLineSpec        6822  2013-04-07T11:19:29  1342269469  get Herschel/PACS observation #1342269469                           PSpecL-12  -copy                                                                                                      
    4  18.0413  1424  M81grouppos13-1                      09 57 24.60  +69 19 40.7  OT2_mlehnert_2     PacsLineSpec        6822  2013-04-07T09:23:38  1342269468  get Herschel/PACS observation #1342269468                           PSpecL-12                                                                                                             
    5  22.2635  1424  M81grouppos12-1-1                    09 52 30.62  +69 23 03.9  OT2_mlehnert_2     PacsLineSpec        6543  2013-04-07T07:32:26  1342269467  get Herschel/PACS observation #1342269467                           PSpecL-11  -copy                                                                                                      
    6  22.2635  1424  M81grouppos12-1-1                    09 52 30.62  +69 23 03.9  OT2_mlehnert_2     PacsLineSpec        6543  2013-04-07T05:41:14  1342269466  get Herschel/PACS observation #1342269466                           PSpecL-11                                                                                                             
    7  39.3509  1425  M81grouppos14-1-1                    09 56 26.35  +69 44 48.3  OT2_mlehnert_2     PacsLineSpec        6543  2013-04-08T05:20:30  1342269536  get Herschel/PACS observation #1342269536                           PSpecL-13  -copy                                                                                                      
    8  39.3509  1425  M81grouppos14-1-1                    09 56 26.35  +69 44 48.3  OT2_mlehnert_2     PacsLineSpec        6543  2013-04-08T03:29:18  1342269535  get Herschel/PACS observation #1342269535                           PSpecL-13

External archives :

Data at NED - NASA/IPAC Extragalactic Database : M81 Group

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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