`Alopeke & Zorro
Gemini North Gemini SouthOpticalLast Modified:`Alopeke and Zorro (Hawaiian and Spanish for "fox") are identical fast, low-noise, dual-channel, and dual-plate-scale imagers based on the Differential Speckle Survey Instrument (DSSI, Horch et al.2009, 2012). `Alopeke is permanently mounted on the calibration port at Gemini North, and Zorro on the calibration port at Gemini South. In speckle mode they provide simultaneous two-color diffraction-limited optical imaging (FWHM~0.02" at 650nm) of targets as faint as V~17 over a 6.7" field of view. Wide-field mode provides simultaneous two-color imaging in standard SDSS filters over a 60" field of view.
Available For Proposals at Gemini NorthFor more details, see the schedules and the CfPs.
× Available For Proposals at Gemini South
For more details, see the schedules and the CfPs.
×
Capability Summary (Read more)
Speckle Imaging
- 1-minute integrations comprised of 1000 images of 60 msec each
- 256x256 pixel (2.5") subarray
- Can achieve diffraction-limited resolution (0.016" FWHM at 500nm and 0.025" at 800nm)
- Larger subarrays may be used for extended objects, but the performance will depend on the stability of the atmosphere.
Wide-Field
- Read out of the full frame at 1MHz
- Possible to:
- bin
- read out a subarray
- use the EMCCD amplifier for faster readout
- read more slowly (0.1 MHz) for lower read noise
Guiding Options (Read more)
- PWFS
Papers containing 'Alopeke and/or Zorro data should acknowledge Gemini and the 'Alopeke / Zorro team.
The PI for the Gemini Speckle program is Steve Howell (NASA Ames Research Center).
Announcements
H alpha filter installed in 'Alopeke
Zorro run extended
View All Alopeke-Zorro NewsInstrument Team
gn Instrument Scientist
Andrew Stephens
gn Additional Support Staff
Zachary Hartman
Email: alopeke@gemini.edu
gs Instrument Scientist
Jeong-Eun Heo
gs Additional Support Staff
Jeong-Eun Heo
Email: zorro@gemini.edu