You are here

New GMOS-N flat field feature

, Updated

GMOS-N data taken between the nights of 31 August 2020 and 8 September 2020 show a new flat field feature from dust in the optics, as marked in the image below. A preliminary cleaning of the accessible GMOS optics performed during daytime on 3 September 2020 was not successful in removing the new dust feature and the overall effects were found to be negligible. A thorough cleaning was performed during daytime on 8 September 2020 which successfully removed the new piece of dust as well as other longer-term dust features. We recommend to not mix flats taken from 31 August 2020 to 8 September 2020 with those taken prior to 31 August 2020 or after 8 September 2020. Science data taken before 31 August 2020, between 31 August 2020 and 8 September 2020, or after 8 September 2020 should be calibrated using matching flats obtained during the same time period.

New GMOS-N flat field feature

Tags
GMOS
News Category
Instrument Announcements

News Archive Filter

The GEMMA Podcast

A podcast about Gemini Observatory and its role in the Era of Multi-Messenger Astronomy. Featuring news related to multi-messenger astronomy (MMA), time-domain astronomy (TDA), our visiting instrument program, and more through interviews with astronomers, engineers, and staff both here at Gemini (North and South) and abroad.

Listen Now