Data added in the Database in January, February and April 2007

This page informs on the progress made in the inclusion of new data in the database.

Data added in 2007: August, October and November | May - July | January - April

 

Data added in 2006: October - December | July - September | April - June | January - March

 

2007 April 29

All data were kindly prepared and provided by JCM.

NGC 2506

Data from Arentoft T. et al. 2007, Astron. Astrophys. 465, 965 (2007A&A...465..965A).

 

2007 April 24

All data were kindly prepared and provided by JCM.

NGC 2099

Data from Kang Y.B., et al. 2007, Publ. Astron. Soc. Pacific 119, 239 (2007PASP..119..239K)

NGC 2420

Data from Anthony-Twarog B.J., et al. 2006, Astron. J. 131, 461 (2006AJ....131..461A)

Pleiades

Data from Groenewegen M.A.T. et al. 2007, Astron. Astrophys. 463, 574 (2007A&A...463..574G). Notes: As the RVs are given with respect to the systemic velocities, a value of 5.4 was added to put them on an absolut system.

 

2007 April 22

There is a modified layout of the individual cluster pages online. I downloaded DSS Images regarding to the central coordinates and diameters included in WEBDA. The minimum and maximum diameters for the images are 10 and 45 arcminutes, respectively. The charts were all converted to .png format of 353x354 Pixels of 152 Kbyte size. This should give you an impression about the quality of the coordinates and the cluster itself. Charts for clusters without any observations are underway. Any comments and/or critism are very much appreciated.

 

2007 April 21

Czernik 24

Data from Kim S.C., et al. 2005, J. Korean Astron. Soc. 38, 429 (2005JKAS...38..429K). Notes: Only data within two times the given cluster diameter (600 Pixels) were included. New cluster in the database.

Czernik 27

Data from Kim S.C., et al. 2005, J. Korean Astron. Soc. 38, 429 (2005JKAS...38..429K). Notes: Only data within two times the given cluster diameter (1050 Pixels) were included. New cluster in the database.

 

2007 April 12

More information for clusters without any observations are now displayed, e.g. Berkeley 26. Thanks to Matthias Kronberger for the feedback.

 

2007 April 07

Berkeley 27

Data from Carraro & Costa 2007, Astron. Astrophys. 464, 573 (2007A&A...464..573C). Notes: Only data within four arcminutes around the cluster center were included.

Collinder 74

Data from Carraro & Costa 2007, Astron. Astrophys. 464, 573 (2007A&A...464..573C).

Haffner 8

Data from Carraro & Costa 2007, Astron. Astrophys. 464, 573 (2007A&A...464..573C).

NGC 2509

Data from Carraro & Costa 2007, Astron. Astrophys. 464, 573 (2007A&A...464..573C).

vdB-Hagen 4

Data from Carraro & Costa 2007, Astron. Astrophys. 464, 573 (2007A&A...464..573C). Notes: Only data within three arcminutes around the cluster center were included. New cluster in the database.

 

2007 April 01

Alpha Persei

Data from Messina S. 2001, Astron. Astrophys. 371, 1024 (2001A&A...371.1024M) kindly prepared and provided by JCM.

IC 4996

Data from Zwintz & Weiss 2006, Astron. Astrophys. 457, 237 (2006A&A...457..237Z).

Pleiades

Data from Messina S. 2001, Astron. Astrophys. 371, 1024 (2001A&A...371.1024M) kindly prepared and provided by JCM.

NGC 6530

Data from Zwintz & Weiss 2006, Astron. Astrophys. 457, 237 (2006A&A...457..237Z).

 

2007 February 17

Czernik 25

Data from Sujatha S., et al. 2006, Bull. Astr. Soc. India 34, 357 (2006BASI...34..357S). Notes: New cluster in the database.

 

2007 February 14

Data from Ramsay & Pollaco 1992, Astron. Astrophys. Suppl. Series 94, 73 (1992A&AS...94...73R) kindly prepared and provided by JCM.

NGC 2421


NGC 2439


NGC 2489


NGC 2567


NGC 2627


NGC 2658


NGC 2910

 

2007 February 10

IC 1805

Data from De Becker M., et al. 2006, Astron. Astrophys. 456, 1121 (2006A&A...456.1121D).

 

2007 February 04

Blanco 1

Data from Jeffries & James 1999, ApJ 511, 218 (1999ApJ...511..218J) kindly prepared and provided by JCM.

 

2007 January 31

NGC 6383

Data from Paunzen E., et al. 2007, Astron. Astrophys. 462, 157 (2007A&A...462..157P).

 

2007 January 29

NGC 6611

Data from Guarcello M.G., et al. 2007, Astron. Astrophys. 462, 245 (2007A&A...462..245G). Notes: Only stars with available V magnitude were included.

 

2007 January 23

NGC 6611

I completely revised the data for this cluster. There were several inconstencies which are now solved.

 

2007 January 21

Data from Baumgardt H., et al. 2000, Astron. Astrophys. Suppl. 146, 251 (2000A&AS..146..251B).

 

2007 January 11

Blanco 1

Data from Ford A., et al. 2005, MNRAS 364, 272 (2005MNRAS.364..272F) kindly prepared and provided by JCM.

 

2007 January 05

Mamajek 2

Data from Mamajek E.E. 2006, Astron. Journal 132, 2198 (2006AJ....132.2198M). Notes: New cluster in the database.

 

2007 January 04

All data were kindly provided by Brian Skiff.

Berkeley 62


NGC 4755


NGC 6913


NGC 6997

I disentangled the two often confused clusters NGC 6996/7. Here is the information according to Brian Skiff.

William Herschel's position for what he called VIII 58 (and assigned NGC 6997 in the original NGC) was published as part of a large catalogue in Phil Trans 76, 212 (1789). Looking at DSS2-blue cutouts with SkyView with a coordinate grid overlain suggests an accurate center is: 20 56 40 +44 38.5 (J2000), with some slop of a few tenths of an arcminute only. Since this is within an arcminute of Herschel's 1789 position, the identity is unambiguous. Thus all papers referring to NGC 6996 actually are dealing with NGC 6997, the modest (probably real) open cluster superposed on the western side of the North America Nebula.
NGC 6996 was listed first by John Herschel, and its position from the original NGC precesses to: 20 56 25 +45 28.2 (J2000), some 50' north of NGC 6997. A look at the DSS shows a scattered group of moderately-bright stars about 7' across ---not an open cluster--- at this location, which fits the visual description. Again, there is no ambiguity about the identification. So although this is legitimate NGC object, it is not of any astrophysical interest.

 

epaunzen@physics.muni.cz
Last Update: 2007 April 29