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2010A Instrument Availability and Target Accessibility

This page provides best estimates, at the time of the Call for Proposals, of instrument availability and target (RA, dec) restrictions for 2010A.

Instrument Changes

As there are more instruments than the number of available ports on each telescope, instrument swaps will be required. Therefore not all instruments will be available for the entire semester. When possible instrument swaps will be scheduled to minimize impact on the queue and instrument swaps will be driven by demand. Hence the final schedule will not be made until after the 2010A programs are known. It may be the case that certain targets or entire programs will not be feasible once the final schedule is determined, at ITAC or thereafter. In 2010A Michelle, T-ReCS and possibly Phoenix will not be offered for the entire semester, as described below in the Gemini North and South accessibility sections. If an instrument is requested for less than 6% of the Bands 1+2 time, the Observatory reserves the right to limit the RA range available to programs, or to not schedule the instrument. During classical runs, no instrument changes on the Instrument Support Structure are permitted.


 

Gemini North Instrument Availability and Target Accessibility


NIFS and Michelle share the up-looking port; NIFS will be available between March and June, and Michelle available in February and July only. Hence there are restrictions on the RAs available to Michelle, as given in the Table below. Observations requiring the Laser Guide Star (LGS) system are restricted by the limitation that the LGS must be used at or above 40 degrees elevation. How this translates into RA and dec restrictions is indicated in the Table below. All instruments are restricted for sky visibility as described in the Table and Figure below.

 


Accessible Restricted** Inaccessible
Declination,
non-LGS
-30d to +73d -37d to -30d,
+73d to +79d
< -37d and > +79d
Declination,
LGS
-22d to +65d -27d to -22d,
+65d to +68d
< -27d and > +68d
Right Ascension,
non-LGS
7h to 22h 4h to 7h,
22h to 1h
1h to 4h
Right Ascension,
LGS
8h to 21h 5h to 8h,
21h to 0h
0h to 5h
Right Ascension,
Michelle
7h to 14h,
16h to 22h
5h to 7h,
14h to 16h,
22h to 1h
1h to 5h
**GMOS MOS programs requiring pre-imaging should not have targets in this region. Programs with targets in this region should not require a large amount of time, or have strict timing or observing constraints.

 

GN Target Accessibility

Figure 1: Schematic representation of target accessibility at Gemini North during semester 2010A. Green regions offer unrestricted access, red regions are inaccessible. Hatched areas indicate the more restricted LGS regions. The yellow region is possible, but restricted. Michelle has additional constraints. See text, and values in the Table above.


 

Gemini South Instrument Availability and Target Accessibility


T-ReCS and NICI share the up-looking port and T-ReCS will only be available during the drier months of April to July, with instrument swaps driven by demand. Hence there are restrictions on the RAs available to T-ReCS, as given in the Table below. Phoenix availability may be limited in the second half of the semester due to commissioning of MCAO/GSAOI. All instruments are restricted for sky visibility as described in the Table and Figure below.

 


Accessible Restricted** Inaccessible
Declination -87d to +22d -89d to -87d,
+22d to +28d
< -89d and > +28d
Right Ascension 7h to 23h 5h to 7h,
23h to 2h
2h to 5h
T-ReCS, RA 9h to 23h 8h to 9h,
23h to 2h
2h to 8h
**GMOS MOS programs requiring pre-imaging should not have targets in this region. Programs with targets in this region should not require a large amount of time, or have strict timing or observing constraints.

 

 

GS Target Accessibility

Figure 2: Schematic representation of target accessibility at Gemini South during semester 2010A. Green regions offer unrestricted access, red regions are inaccessible. The yellow region is possible, but restricted. T-ReCS has additional constraints. See text, and values in the Table above.