It was recently reported that the observed counts in spectra seemed to be lower than expected on CCD1 for some programs - also, odd emission-like features (‘spikes’) were noticed in the CCD1 portion on stellar spectra that are known to be featureless. All this applies only to data acquired during the ‘bad-CTE’ periods of CCD1, i.e. between:
NIFS has a cryogenic issue which started at the time of the earthquake and power outage on Monday 5th July. This problem has developed and it is now clear that the instrument must be warmed up completely to effect mitigation. NIFS will remain off the telescope until this is completed; NIRI will remain on for the time being.
The GHOST project continues to be on hold due to the pandemic and we do not expect to start the re-assembly and test of the instrument at Cerro Pachon this year. We are hopeful that the travel restrictions will ease in the first half of 2022 so this work can begin. In the meantime, we continue to make incremental improvements to our software and documentation, and order spare parts.
After a minor fix to its controlling computer, Zorro is back online starting May 31.
April 24th, 2022: GNIRS will be removed from the telescope on April 28th, 2022 and is planned to be unavailable for use until July 6th, 2022 due to the GNIRS IFU installation and refurbishment projects.
May 17th, 2021: The GNIRS IFU installation, originally planned for 2021B, has been postponed until 2022. Therefore, GNIRS will be available for the entire 2021B semester.
After overcoming an issue with the compressors and another with the temperature in the MOS dewar, F2 has been back to queue operations since April 23rd.
A failure in the Zorro PC will make the instrument unavailable until May ~5th.
On Sunday 4th a problem was found with the compressors, affecting the F2 vacuum. The instrument needs to be warmed-up to inspect the issue and therefore will not be available for a week or so.
The blue filter wheel of Zorro has been behaving erratically for past few monhts. This has had only minimal impact on operations, since the great majority of Zorro programs use the same filter. A new filter wheel has arrived recently to Pachon and the replacement will happen in the next few weeks.
2021-Jan-15: Altair has been repaired and is now in a state where it can be used in Natural Guide Star (NGS) mode. We will resume offering Altair in NGS mode starting with the upcoming Fast Turnaround cycle. Further work is needed before we can offer Altair in Laser Guide Star (LGS) mode.