Zero Point Evolution before 2006

 

For more detailas and ZP uncertainties follow the links bellow the first table here.

 

Imaging mode and filter LF - J LF - H LF - Ks LF - Z SF - J SF - H SF - Ks SO - J SO - H SO - Ks HRF - Ks LF_FE - J LF_FE - Ks
                           
Zero Point 23.278 23.061 22.446 22.60 23.11 22.92 22.40 23.13 22.96 22.34 22.32 23.14 22.38
Date Nov 2003 Nov 2003 Nov 2003 Dec 1997 Dec 2002 Dec 2002 Dec 2002 Dec 2002 Dec 2002 Jan 2002 Dec 1997 Jul 1998 Jul 1998
                           
Zero Point 23.11 22.91 22.36                    
Date May 2004 May 2004 May 2004                    
                           
Zero Point 23.117 22.915 22.349                    
Date Jul 2010 Jul 2010 Jul 2010                    
                           
Zero Point 23.126 22.933 22.126                    
Date May 2011 May 2011 May 2011                    

Nota Bene: the zero points after the Nov 2005 intervention (and mirror aluminization): 23.23+/-0.04, 23.02+/-0.03, and 22.41+/-0.01 for J, H and Ks Large Field Mode, respectively. This result is based on 15, 16 and 14 measurements respectively, over 7 nights in the period from Nov 20 to Dec 13, 2005. Atmospheric extinction coefficients were also determined.

Zero Point Evolution in J, H and K Bands since December 1997

Encapsulated Postscipt format