Subject: ARCES and Truss Lamp upgrades
From: William Ketzeback
Submitted: Thu, 9 Feb 2012 10:42:23 -0700
Message number: 1262
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Users,
This week we have made a few changes to instrumentation on the 3.5-m =
that I'd like to inform you about.=20
We have upgraded the Bright and Dim Truss Cal lamps with a much more =
efficient set of lamps. The bulbs are the same producing the same color =
temperature however the light is now much more directed to the mirror =
covers giving a brightness increase of approximately 2.5x with the =
bright quartz lamps and 30x with the dim quartz lamps. This will =
translate to shorted exposure times for dome flats for our various =
instruments and in several instances recommendations to switch to the =
dim quartz lamps. We are working on updating the Users Manuals for the =
various instruments with the new recommended exposure times however be =
aware that you may wish to give yourself a little more time for taking =
and looking at your cals.
Additionally, as part of planned upgrades to ARCES this year we have =
installed a new echelle slitviewer this week. The image size and plate =
scale has not changed. This camera is more sensitive and has a faster =
readout. Exposure times for acquisition and guiding should be expected =
to differ. Echelle users will find this a useful upgrade. We hope to =
update the ARCES Users Manual by tomorrow with new items for this =
camera.=20
For up to date information on instrument news go to =
http://www.apo.nmsu.edu/arc35m/Engineering/index.html
Bill Ketzeback
Chief Telescope Engineer
ARC 3.5-meter Telescope
Apache Point Observatory
2001 Apache Point Rd
Sunspot, NM 88349
bketzeback@apo.nmsu.edu
V: 575-437-6822
C: 575-302-5456
F: 575-434-5555
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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div>Users,<div><br></div><div>This week we have made a few changes to =
instrumentation on the 3.5-m that I'd like to inform you =
about. </div><div><br></div><div>We have upgraded the Bright and =
Dim Truss Cal lamps with a much more efficient set of lamps. The =
bulbs are the same producing the same color temperature however the =
light is now much more directed to the mirror covers giving a =
brightness increase of approximately 2.5x with the bright quartz lamps =
and 30x with the dim quartz lamps. This will translate to shorted =
exposure times for dome flats for our various instruments and in =
several instances recommendations to switch to the dim quartz lamps. We =
are working on updating the Users Manuals for the various =
instruments with the new recommended exposure times however be =
aware that you may wish to give yourself a little more time for taking =
and looking at your cals.</div><div><br></div><div>Additionally, as part =
of planned upgrades to ARCES this year we have installed a new echelle =
slitviewer this week. The image size and plate scale has not =
changed. This camera is more sensitive and has a faster readout. =
Exposure times for acquisition and guiding should be expected to differ. =
Echelle users will find this a useful upgrade. We hope to update =
the ARCES Users Manual by tomorrow with new items for this =
camera. </div><div><br></div><div>For up to date information on =
instrument news go to <a =
href=3D"http://www.apo.nmsu.edu/arc35m/Engineering/index.html">http://www.=
apo.nmsu.edu/arc35m/Engineering/index.html</a></div><div><br></div><div><d=
iv><span class=3D"Apple-style-span" style=3D"border-collapse: separate; =
color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: =
0px; text-transform: none; white-space: normal; widows: 2; word-spacing: =
0px; -webkit-border-horizontal-spacing: 0px; =
-webkit-border-vertical-spacing: 0px; =
-webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span =
class=3D"Apple-style-span" style=3D"border-collapse: separate; color: =
rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; =
text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; =
-webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: =
0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: 2; =
text-align: -webkit-auto; text-indent: 0px; text-transform: none; =
white-space: normal; widows: 2; word-spacing: 0px; =
-webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: =
0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: 2; =
text-align: -webkit-auto; text-indent: 0px; text-transform: none; =
white-space: normal; widows: 2; word-spacing: 0px; =
-webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: =
0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Bill Ketzeback<br></div><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Chief Telescope Engineer<br>ARC =
3.5-meter Telescope</div><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><br>Apache Point Observatory<br>2001 Apache Point Rd<br>Sunspot, NM =
88349<br><br><a =
href=3D"mailto:bketzeback@apo.nmsu.edu">bketzeback@apo.nmsu.edu</a></div><=
div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">V: 575-437-6822</div><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">C: 575-302-5456</div><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">F: =
575-434-5555</div><div><br></div></span></div></span></div></span></span><=
/div></div>
</div>
<br></body></html>=
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