uc:uc20221004_october_4_2022
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uc:uc20221004_october_4_2022 [2022/10/07 17:07] nchanove |
uc:uc20221004_october_4_2022 [2022/10/07 17:18] (current) nchanove |
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| Attending: Nancy Chanover (NMSU), Joanne Hughes (Seattle U), Eric Nielsen (NMSU), Aleksandr Mosenkov (BYU), Jamey Eriksen (APO), Caleb Wang (UW), Sarah Tuttle (UW), Mukremin Kilic (OU), Kevin Schlaufman (JHU), Bill Ketzeback (APO), Eric Bellm (UW), Ben Williams (UW) | Attending: Nancy Chanover (NMSU), Joanne Hughes (Seattle U), Eric Nielsen (NMSU), Aleksandr Mosenkov (BYU), Jamey Eriksen (APO), Caleb Wang (UW), Sarah Tuttle (UW), Mukremin Kilic (OU), Kevin Schlaufman (JHU), Bill Ketzeback (APO), Eric Bellm (UW), Ben Williams (UW) | ||
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| + | We started by introducing Caleb Wang, a new mechanical/ | ||
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| * NMSU - nothing to report | * NMSU - nothing to report | ||
| * NAPG - no report | * NAPG - no report | ||
| - | * Oklahoma - A user recently had 2 nights with KOSMOS and everything went smoothly, They had a question about the setup; they find that blue grating in the central position is slightly different than OSMOS on MDM. The spectral coverage for the OSMOS grating is 4000-6800 A, whereas for KOSMOS it is 3800-6600, which is a bit close to H alpha. The high slit position shifts the wavelength coverage to 4150-7050, which is good for Halpha, but then misses some of the higher order Balmer lines. The blue/center setup is working fine and is usable, but the question was raised whether it would be possible to change the grating center, perhaps by shifting it or making a different slit that was between the current " | + | * Oklahoma - A user recently had 2 nights with KOSMOS and everything went smoothly, They had a question about the setup; they find that blue grating in the central position is slightly different than that of OSMOS on MDM. The spectral coverage for the OSMOS grating is 4000-6800 A, whereas for KOSMOS it is 3800-6600, which is a bit close to H alpha. The blue/center setup is working fine and is usable, but the question was raised whether it would be possible to change the grating center, perhaps by shifting it or making a different slit that was between the current " |
| * Seattle - nothing to report | * Seattle - nothing to report | ||
| * UVa - nothing to report (by email) | * UVa - nothing to report (by email) | ||
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| === Additional telescope and instrument discussion === | === Additional telescope and instrument discussion === | ||
| - | The weather on the mountain is changing with the start of fall, and we expect to see the normal telescope shifts that are due to temperature changes. KOSMOS is moving off of shared-risk category (see below for more details). DIS is being serviced right now. We anticipate having fewer visitors on site in October. We are setting aside some time on ARCSAT for obs-spec training with Shelyak so we can support its use more broadly. It is not ready to be offered to the broad user community. The software, which is a pre-packaged interface that we have to customize for our needs, | + | The weather on the mountain is changing with the start of fall, and we expect to see the normal telescope shifts that are due to temperature changes. KOSMOS is moving off of shared-risk category (see below for more details). DIS is being serviced right now. We anticipate having fewer visitors on site in October. We are setting aside some time on ARCSAT for obs-spec training with the Shelyak so we can support its use more broadly. It is not yet ready to be offered to the broad user community. The software, which is a pre-packaged interface that we have to customize for our needs, |
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| === KOSMOS update === | === KOSMOS update === | ||
| - | After having | + | After nearly a year of KOSMOS usage on the 3.5m we are now planning to remove it from shared risk category. Going forward it will be offered to our users as a standard facility instrument. We do still have a punchlist of issues that we're working on, but after having met to discuss those items it was decided that nothing on the list impeded us from moving it off of shared risk. We are aware that the bias level appears to be changing, and the associated controller issues are still being worked on. There are also still some deliverables we are waiting for, i.e. the new slits. Over the next several months we will be reaching out to KOSMOS users who have exercised the instrument for different types of targets (extended source, faint limit, etc.) to help us understand the ramifications of some of the known instrument issues on their data. |
| Our meeting about the status of KOSMOS highlighted the fact that APO does not have a standing definition of shared risk and how to transition an instrument off of that status, so as an output of the conversation over the next month we will be putting together a document that defines shared risk and the expected path that takes an instrument through commissioning to becoming a facility instrument. | Our meeting about the status of KOSMOS highlighted the fact that APO does not have a standing definition of shared risk and how to transition an instrument off of that status, so as an output of the conversation over the next month we will be putting together a document that defines shared risk and the expected path that takes an instrument through commissioning to becoming a facility instrument. | ||
| - | Note added in proof regarding the issue of the wavelength coverage of the blue center slit: Currently the blue grating on KOSMOS in the central position covers 3800-6600 A, so the red cutoff is very close to Halpha. This setup is not ideal for observing magnetic targets, which have Zeeman splitting of the Halpha line. The high slit position shifts the wavelength coverage to 4150-7050, which is good for Halpha, but now misses some of the higher order Balmer lines. So the question was asked whether it would be possible to have another slit position that would cover the range from 4000-6800 A, or something like that. **UC reps: please query your users to determine if they would be interested in this capability.** | + | Note added in proof regarding the issue of the wavelength coverage of the blue center slit: Currently the blue grating on KOSMOS in the central position covers 3800-6600 A, so the red cutoff is very close to Halpha. This setup is not ideal for observing magnetic targets, which have Zeeman splitting of the Halpha line. The high slit position shifts the wavelength coverage to 4150-7050, which is good for Halpha, but now misses some of the higher order Balmer lines. So the question was asked whether it would be possible to have another slit position that would cover the range from 4000-6800 A, or something like that. **UC reps: please query your users to determine if there are additional needs for this capability.** |
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| === Q4 3.5m scheduling === | === Q4 3.5m scheduling === | ||
| - | There is no available open or DD time until mid-November, | + | There is no available open or DD time until mid-November, |
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| === ARC Board of Governors Meeting === | === ARC Board of Governors Meeting === | ||
| - | The ARC Board of Governors meeting is on Monday November 7. Nancy, Ben, and some of the observatory staff are starting to gather the relevant data and prepare their presentations. Nancy reiterated her request for science highlights from each institution (she sent an email request to the 35m-general mailing list on 10/ | + | The ARC Board of Governors meeting is on Monday November 7. Nancy, Ben, and some of the observatory staff are starting to gather the relevant data and prepare their presentations. Nancy reiterated her request for science highlights from each institution (she sent an email request to the 35m-general mailing list on 10/ |
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| * UC reps: please encourage your users to submit science highlights. **Nancy needs to have them all in hand by Wednesday October 26.** | * UC reps: please encourage your users to submit science highlights. **Nancy needs to have them all in hand by Wednesday October 26.** | ||
| - | * UC reps: please query your users to determine whether they would be interested in a slightly different wavelength range for the blue grating. | + | * UC reps: please query your users to determine whether they have a need for a slightly different wavelength range for the blue grating. |
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uc/uc20221004_october_4_2022.1665162479.txt.gz ยท Last modified: 2022/10/07 17:07 by nchanove
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