5 May 2022: Observation requests can now repeat observations of multiple configurations (i.e. targets). The request composition page in the Observation Portal now includes a field for setting a number of "Configuration Repeats," the number of times that you want the telescope to loop through the set of configurations (and subordinate instrument configurations). The "Configuration Repeats" option is intended to enable "nodding" between targets that are in the same general area of the sky, but are separated by more than a camera's field-of-view. The option is also available through the portal API.
14-18 Apr 2022: A bug was introduced in the instrument configuration code, which led to large pointing errors on the 1-meter telescopes at Siding Spring (COJ), Sutherland (CPT), and Cerro Tololo (LSC).
21 Mar 2022: Changes to the archive API and authentication protocols may require users to modify their login behavior or their scripts that interact with the archive. The changes are summarized in this document and described in detail in the Developers pages.
17 Feb - 2 Mar 2022: Access to archived data intermittently timed out, and interactions with the archive UI were slow. These hindrances were likely the result of LCO temporarily maintaining two databases, while data are transferred from a database at LCO HQ to a database in the cloud.
11 Feb 2022: Users now have the option of setting a Fractional Ephemeris Rate when observing non-sidereal objects. A floating point number between 0 and 1 indicates the fraction of the object's proper motion at which the telescope should track. For more information, consult the "Getting Started" Guide.
16 Dec 2021: The BANZAI pipeline was upgraded to include the detection of cosmic rays (CRs) in images. The detection method is a convolutional neural network, packaged as Cosmic-CoNN. The method identifies the probabilities that pixels are affected by CRs; pixels with probabilities exceeding 0.5 are added to the bad pixel mask extension. The image pixels are not modified.
29 Nov 2021: We now calculate the FWHM of extracted sources as the 90th percentile of the distribution of distances from the source center to the half-maximum contour. This new measurement remedies the occasional mismatch between focus quality and FWHM for corner cases such as stars with donut-shaped and crescent-shaped PSFs. We also calculate (and place in the image headers) the FWTM, which is the ratio of the FWHM to the "Full Width at Tenth Maximum."
16 May 2022: There's a problem with the Dome B shutter. Observations with the telescope in Dome B are suspended until the problem can be investigated.
9-13 May 2022: The Spectral camera wasn't cooling down. Imaging observations on the 2-meter telescope were not possible.
5-9 May 2022: The disk in the site's core computer was swapped. Operations were suspended while data/telemetry/etc data were copied over.
4 May 2022: Moisture has seeped into the kb24 camera (on the 0m4a telescope). Science observations with this camera are not possible until the camera can either be cleaned or replaced.
14-18 Mar 2022: A disk on the site's core computer failed. Science observations were not possible.
21-27 Jan 2022: The secondary mirror of the 0m4a telescope was stuck on a limit.
26 Nov - 2 Dec 2021: A problem with pressure in the rams that open the clamshell triggered an alarm. The clamshell remained closed until the rams could be tested. Fortunately(?!?), the weather was bad for all of these nights, so no observing opportunities were lost.
5-6 Oct 2021: The 1-meter telescope in Dome B was stuck on the pitch axis.
6 May 2022: A burned-out electrical relay was preventing the telescope from tracking. All observations during the second half of the night failed.
25-28 Mar 2022: A card that checks the dome's shutter position was faulty and had to be repaired. Science observations with TLV-NRES were not possible.
26 Oct 2021: The NRES spectrograph is available for science observations again.
21 Oct 2021: A new compressor was installed on the NRES unit, and camera achieved the target temperature. Tests are in progress.
5 Oct 2021: The NRES unit has been taken offline to improve the vacuum around the camera.
22 Apr 2022: The fa14 Sinistro camera (on the Dome B telescope) malfunctioned. Science observations with this camera are suspended.
19 Apr 2022: Science observations resume with the 1-meter telescopes in Domes B and C.
13 Apr 2022: Science observations resume with the 1-meter telescope in Dome A.
11 Apr 2022: The site suffered a power outage. Observations were not possible until all facilities could be recovered.
27 Mar 2022: The fa14 Sinistro (Dome B) was offline for the second half of the night.
22-24 Mar 2022: The fa14 Sinistro camera (on the Dome B telescope) was warmed-up so that the cryo system could be checked for leaks.
8 Mar 2022: The focus mechanism on the 0m4a telescope (kb87 camera) has malfunctioned again. The telescope is not available for science observations.
18-22 Feb 2022: The fa06 cooling system (in Dome C) required a warm-up and purge. The camera was unavailable for science observations.
13 Feb - 6 Mar 2022: The fa14 Sinistro camera on the Dome B telescope warmed-up and was taken offline.
9-14 Feb 2022: The fa16 camera on the Dome A telescope warmed-up when the vacuum in the cryo system was lost. The camera was pumped down and cooled again.
2 Dec 2021: The Dome B telescope is available for science observations again!
22 Nov 2021: The M2 mechanism has been replaced on the 1-meter telescope in Dome B. This telescope will be offline until the collimation is checked.
10 Nov 2021: The faulty focus mechanism on the 0m4a telescope was replaced, and the kb87 SBIG camera was tested. This 0m4a telescope is now available for science observations again.
29 Apr 2022: The kb56 SBIG camera replaced kb96 on the 0m4b telescope and was released for science observations.
28 Apr - May 2 2022: Tests of new encoder tape and new readhead on the Dome B telescope prevented science observations.
25 Apr - May 1 2022: A new encoder tape has been installed on the roll axis of the telescope in Dome A. This telescope was not available while the new encoder is tested.
30 Mar 2022: The kb96 camera is warm. In fact, the camera was warm for over a week, but the warm-up was not detected because of problem providing power. The camera must be replaced.
30 Mar - 11 Apr 2022: There were problems getting Dome A to close. The telescope was unavailable during this time.
11 Feb 2022: The kb96 SBIG camera is now available for science observations.
7 Feb - 7 Mar 2022: The focus mechanism on the 1-meter telescope in Dome B was stuck. The telescope was not available for science observations while the problem was investigated.
20 Jan 2022: The kb96 SBIG camera has been installed on the 0m4b telescope. Test observations are underway.
6 Dec 2021: The kb95 camera is available for science observations.
16 Nov 2021: The kb95 camera was installed on the 0m4a telescope. Instrument commissioning is underway.
11 Oct 2021: A replacement camera for the 0m4a telescope has arrived on site.
16 May 2022: The 1-meter telescope in Dome B is stuck on the roll axis.
3 May 2022: A spare compressor was installed on the NRES camera's cryostat, allowing the camera to cool. NRES science observations resumed.
19 Apr 2022: At ~9 UT, there was a CTIO-wide power outage, which lasted for 3 hours. Communications to the site were not restored until ~22 UT. Observations with the 1-meter telescopes (Domes A, B, C) did not resume until late in the night of April 20. The LSC-NRES unit has not yet thermalized, so science observations with NRES are not possible.
2 Mar 2022: The fa03 Sinistro camera, on the 1-meter telescope in Dome C, is available for science observations again.
26-28 Feb 2022: Power to the crates on the Dome A telescope were accidentally turned off. The fa15 camera warmed-up and was not available for science observations.
22 Feb 2022: The Dome B telescope is available for science observations again.
24 Jan 2022: There's a problem controlling the secondary mirror on the 0m4a telescope in Aqawan A. Science observations with this telescope are not possible.
15 Jan 2022: The fa03 Sinistro in Dome C has warmed-up. The cryo system will need to be replaced. The telescope is offline.
13 Jan 2022: The Dome C telescope is available for science observations again.
9 Jan 2022: The fa03 Sinistro (Dome C) has been warmed-up so that the cryo system can be pumped. Science observations with this telescope are suspended.
6 Dec 2021: The 1m telescope in Dome C is available for science observations again.
1 Dec 2021: A new controller for the secondary mirror on the Dome C 1m telescope was installed today. Collimation tests/adjustments are being made.
11-16 Nov 2021: The Dome A telescope was stuck on the pitch axis.
10 Nov 2021: The filter wheel on the 1-meter telescope in Dome B is not communicating. The culprit is likely the wheel's controller board. The Dome B telescope will only be available for NRES observations until the filter wheel controller is repaired.
8 Nov 2021: The fa15 camera warmed-up again and was offline all night.
5-7 Nov 2021: The fa15 Sinistro camera on the telescope in Dome A warmed-up and was taken offline.
19 Oct 2021: The Dome A telescope is available for science observations again.
14 Oct 2021: The telescope in Dome A repeatedly gets stuck on the pitch axis. The telescope has been taken offline to investigate the problem. The Dome C telescope is still offline, too.
11 Oct 2021: The collimation of the 1-meter telescope in Dome C was lost, so the telescope was taken offline. The optical tube assembly will be inspected.
27 Apr 2022: The fa17 camera on ELP-NRES warmed-up, preventing science observations.
29 Mar 2022: The ELP-NRES unit is back online, with the Dome B telescope providing the light into the spectrograph. In Dome A, the ak16 AGU (Acquisition and Guide Unit) was installed in place of ak11. The new ak16 is being setup and tested.
28 Mar 2022: An LCO engineer is at McDonald Observatory to complete various maintenance tasks.
10 Mar 2022: The NRES acquisition camera (ak11) in the Dome A telescope died. Because this camera and the Dome B telescope are both unavailable, observations with the NRES spectrograph are not possible.
8 Mar 2022: The mechanism controlling the secondary mirror is stuck. Science observations are not possible.
6-9 Mar 2022: The NRES camera (fa17) warmed-up.
26 Feb 2022: The telescope in Dome A was taken offline because of a problem with the focus mechanism.
20-23 Feb 2022: The NRES camera (fa17) warmed-up and was taken offline.
12 Feb 2022: The LCO engineering team has left the site.
8 Feb 2022: The kb55 SBIG camera was installed on the 0m4a telescope. Camera testing is in-progress.
3 - 11 Feb 2022: The Dome B 1-meter telescope was taken offline for maintenance.
1 - 9 Feb 2022: The Dome A 1-meter telescope was taken offline for maintenance.
30 Jan 2022: LCO engineers have arrived on site.
11 Jan 2022: There's a problem with the air compressor on site. The spare compressor has been installed, but the Dome B telescope has been taken offline. NRES observations are not possible.
13-15 Dec 2021: The backend camera (fa17) for NRES warmed and was unavailable for science observations.
20 Apr 2022: The 0m4b telescope is available for science observations again.
17 Apr 2022: The encoder was replaced on the roll axis of the 0m4b telescope, and the telescope is moving again. Testing is underway.
4 Jan 2022: Science observations resume with the Haleakala telescopes ... except for 0m4b, which still has a problem with the roll axis.
2 Jan 2022: All telescopes except 0m4b are operational, but the clamshell enclosure must still be checked before science observations can resume.
29 Dec 2021: Power was restored to the Haleakala site. The telescopes/instruments are not yet ready for science observations, and the weather is poor.
22 Dec 2021: The power is out again. MECO (Maui Electric Company) cannot fix the problem until Dec 28.
16 Dec 2021: Science operations have resumed! The 0m4b telescope (kb27 camera) is stuck on the roll axis and remains offline.
14 Dec 2021: Communications to the Haleakala site have also now been restored. The post-storm inspection of our equipment is in progress.
10 Dec 2021: Power to the Haleakala site has been restored. Unfortunately, communications are still down.
5 Dec 2021: A powerful storm hit Hawaii. The power is out at the Haleakala site, and communications have been severed.
4-6 Oct 2021: The 2-meter telescope is offline while preparations are made for replacement of the Auxiliary Mechanisms Node.