Star Forming Region  g45.45
M.Feldt (May 21, 2002)
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Description:
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g45.45 (centre, J2000.0) 19:14:21.3  +11:09:13.5

Ultracompact HII region from WC89, observerd by AO systems ADONIS and
Gemini North. At least 8 O-stars identified inside, large amounts of
hot dust + one obscured (in K) source to the north. The goal of NACO
observations is manyfold:

1.) use highest resolution in J to search for further multiplicity of
stellar sources

2.) use H / K / L data to go deeper than any of previous observations,
    thereby detect new stellar sources and secure the older
    identifications which were based on the H-K-colour only.

3.) find & identify the deeple embedded northern source

4.) Trace the origin of BrG emission and possibly deteced H2-line
    emission; new extinction determination.

5.) new detailed map of the hot dust distribution, possibly new traces
    of sequential star formation

6.) at least one really cool picture!


Observations:
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Guide star:
GSC0104500290   288.592 11.1542  J2000  M_V=12.01
                19:14:21.967 +11:09:15.23

C50S:
J  5s * 12 *  5 positions (+/-4" = 300 pix) + 2 sky (C50s)

C25S:
H  5s * 12 *  5 positions (+/- 8 " = 300 pix) + 2 sky
K  5s * 12 *  5 positions + 2 sky
BrG 10s * 12 * 5 positions
cont 10s * 12 * 5 positions
H2 10s * 12 * 5 positions

C25L:
L  0.2s * 60 * 5 positions (no sky) * 5 cycles


Total Integration time : 56 minutes
Overhead factor of 2 = 2 hours
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