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AUTO-GUIDING SYSTEM FOR CQUEAN (CAMERA FOR QUASARS IN EARLY UNIVERSE)

  • Received : 2011.01.07
  • Accepted : 2011.07.20
  • Published : 2011.08.31

Abstract

To perform imaging observations of optically red objects such as high redshift quasars and brown dwarfs, the Center for the Exploration of the Origin of the Universe (CEOU) recently developed an optical CCD camera, Camera for QUasars in EArly uNiverse (CQUEAN), which is sensitive at 0.7-1.1 ${\mu}m$. To enable observations with long exposures, we develop an auto-guiding system for CQUEAN. This system consists of an off-axis mirror, a baffle, a CCD camera, a motor and a differential decelerator. To increase the number of available guiding stars, we design a rotating mechanism for the off-axis guiding camera. The guiding field can be scanned along the 10 arcmin ring offset from the optical axis of the telescope. Combined with the auto-guiding software of the McDonald Observatory, we confirm that a stable image can be obtained with an exposure time as long as 1200 seconds.

Keywords

instrumentation: CCD camera;techniques: photometric;telescopes;auto-guiding

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Cited by

  1. FOCAL REDUCER FOR CQUEAN (Camera for QUasars in EArly uNiverse) vol.46, pp.4, 2013, https://doi.org/10.5303/JKAS.2013.46.4.161
  2. Camera for Quasars in Early Universe (CQUEAN)1 vol.124, pp.918, 2012, https://doi.org/10.1086/667390
  3. VARIABILITY AT THE EDGE: OPTICAL NEAR/IR RAPID-CADENCE MONITORING OF NEWLY OUTBURSTING FU ORIONIS OBJECT HBC 722 vol.764, pp.1, 2013, https://doi.org/10.1088/0004-637X/764/1/22
  4. COLOR VARIABILITY OF HBC 722 IN THE POST-OUTBURST PHASES vol.149, pp.2, 2015, https://doi.org/10.1088/0004-6256/149/2/73
  5. HOST GALAXY PROPERTIES AND BLACK HOLE MASS OF SWIFT J164449.3+573451 FROM MULTI-WAVELENGTH LONG-TERM MONITORING ANDHSTDATA vol.808, pp.1, 2015, https://doi.org/10.1088/0004-637X/808/1/96
  6. CORRELATION BETWEEN GALAXY MERGERS AND LUMINOUS ACTIVE GALACTIC NUCLEI vol.804, pp.1, 2015, https://doi.org/10.1088/0004-637X/804/1/34
  7. The Infrared Medium-deep Survey. III. Survey of Luminous Quasars at 4.7 ≤ z ≤ 5.4 vol.231, pp.2, 2017, https://doi.org/10.3847/1538-4365/aa7de5
  8. SYNCHROTRON SELF-INVERSE COMPTON RADIATION FROM REVERSE SHOCK ON GRB 120326A vol.789, pp.2, 2014, https://doi.org/10.1088/0004-637X/789/2/146
  9. Development of SED Camera for Quasars in Early Universe (SQUEAN) vol.128, pp.969, 2016, https://doi.org/10.1088/1538-3873/128/969/115004
  10. ∼ 5 with a Medium-band-based Approach vol.870, pp.2, 2019, https://doi.org/10.3847/1538-4357/aaf387

Acknowledgement

Supported by : National Research Foundation of Korea(NRF)