LAS & GCS SV2 reports

“UKIDSS SV meeting”, Edinburgh, 15 December 2005

Nicolas Lodieu

LAS report

Photometry of known L/T dwarfs

No constraint on the Class

LAS diagrams (1)

Separation Stars & Galaxies

WFCAM tile @ RA=10h46 dec=04°24'

LAS diagrams (2)

(J-H,Y-J) diagram (J-K,Y-J) diagram

LAS vs SDSSWFCAM tile @ RA=09h40 dec=45°WFCAM tile @ RA=10h46 dec=04°24'

(J-K,z-J) diagram(J-K,z-J) diagram

Finding charts

GCS report

IC4665: completeness limits

IC4665: errors on the magnitudes

Z

K

J

Y

H

J zoom

0.1 mag @ Z=19.0

0.1 mag @ J=18.5

0.1 mag @ K=17.0

0.1 mag @ Y=19.0

0.1 mag @ H=18.0

IC4665: CMD (1)

(Y-J,Y) CMD from SV1

IC4665: CMD (2)(Y-J,Y) CMD from SV2

IC4665: Finding charts

Coma Ber: (Y-J,Y) CMD

Coma Ber: Finding charts

Upper Sco: (Z-J,Z) CMD

IC4665: colour-colour diagram

Conclusions

1) Pipeline

2) Suggestions for WSA

Main concern: photometry in LAS and GCS

1) Pipeline seems to detect objects with nothing at their nominal positions

2) Photometry seems unreliable when two stars are close to each other

1) Coordinates in sexagesimal format when an image is output (currently only coordinates in degrees are output)

2) Possibility to input a list of objects to get their UKIDSS photometry