Download presentation
Presentation is loading. Please wait.
1
AXIS programme status n AXIS-I: uApproved November 1999 uObservations started April 2000 u19 nights so far u19.5 nights remaining n AXIS-II uApproved November 2000 uTotal ~50 nights, continuing through to spring 2001
2
2 The AXIS team
3
3 The Observatorio del Roque de los Muchachos JKT (1.0) GTC (10) TNG (3.5) INT (2.5) WHT (4.2) NOT (2.5)
4
4 AXIS:Breakdown of observing nights
5
5 AXIS instruments used
6
6 AXIS wide-field imaging Optical: INT/WFC Near IR: INT/CIRSI (includes M. Watson’s PATT Imaging proposal)
7
7 Search for candidate counterparts i’-band sources within either: 5 (statistical) or 5 arcsec Clusters? Reddened sources? AGNs beyond the Galaxy?
8
8 Candidate counterparts & systematics Count rate > 0.005 ct s -1 |b|>10º Single candidate counterpart 108 sources 66% x 1 =2 , 33% P(x|x 0 )=|x-x 0 |* exp(-|x-x 0 | 2 /2) P obs (x)=f 0 *P(x|0)+ f 1 *P(x|x 1 ) f 0 =0.67; x 0 =0 (fixed) f 1 =0.33; x 1 =2.0
9
9 AXIS spectroscopy: Medium Sample n ~20 sources/field n ~10-15 identifiable with single WHT/WYFFOS configuration (2-3 hours, including overheads) n Most of the remaining sources within reach of long-slit spectrographs. n ~90% completeness expected
10
10 AXIS identifications: Galactic Plane n ~30-50 sources/field n At very low b, most sources have many candidate counterparts: uMultiband photometry (including H ) u2-3 WYFFOS configurations uHigh resolution long slit spectroscopy n At intermediate b (10º-20º) the average number of candidate counterparts decreases.
11
11 AXIS identifications (as of December 1, 2000)
12
12 AXIS expectations
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.