hello, i follow the discussion ... i was suprised about the exposure times of objects with the Lhires III: 15 minutes to 1 hour ..? with the Star Analyser i...
Dominique, A couple of reasons: The grating in the Lhires is 1200 or 2400 lpm compared with 100 in the Star analyser, this means simplistically that the star...
A nice thing about the Lhires III is that you can easily interchange the gratings. While I believe the unit normally comes with the 2,400 l/mm grating, 1,200,...
Hi Ken, ... The grating in the Lhires is 1200 or 2400 lpm compared with 100 in the Star ... into a ... Actually this is an underestimate as it also depends on...
Hello everyone, it's been a while since I posted any new files. I have placed a number of spectra in this folder of the Files section, /User_Folders/MarkD/. ...
Hi Mark, Interesting setup. That should give close to the maximum resolution possible from the Star Analyser. (A nice small star size without giving the...
Robin, all the images were captured from a fixed tripod, so I could only get about 5 secs exposure before trailing. Hope to extend it a bit when I put it on...
hello, saturday i took the spc of arcturus: 21 UT Sct 8"on EQÂ 6 with guiding, Star analyser with adjustable slit (surplus shed) with webcam Atk2Hs i have...
hello, i'm wondering about the symmetrical aspect of this abrupt absorption line ... in case of artefact would this line be symmetrical ? also i think to see a...
Hello everyone, I can't see any file attachments that group members include with their posts. I can see a box saying "xxxx.jpg, attachment not stored". It's ...
Hello Dominique, I am afraid this group does not allow attachments to messages. Can you please put you images in your folder in the files section Thanks Robin ...
Hi According to: http://tech.groups.yahoo.com/group/staranalyser/?tab=s are the: Group Settings - Membership requires approval - Messages do not require...
Hi Mark Now I understand your issue. The attachments are actually delivered by email. But this will happen just if the user has switched on the email delivery ...
Wolfgang, thank you for your comments and help. I would like to get some clear skies, we've had cloud and poor observing conditions for months.... or it's been...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the staranalyser group. File :...
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hello, good morning, i put the images in mine users folder on the website of yahoo staranalyser sorry for the attaches of email of yesterday perhaps is the...
Hello Dominique, I notice that the star has drifted a small distance down from the beginning to the end. Could it be dirt on the CCD? Try stacking all the...
hello Robin, i have taken many controls, every frame(150) controled, stacking without aligning, divide by flat,.... i have made the control very critical: i...
OK can you give me some more information please. What is your spectrograph design? How wide is the slit? Can you see the sky background spectrum or is it too...
hello Robin, indeed, the avi sequence is short: 30 sec, 5 fr/s, 150 frames ! i agree with the variations of the absorptionvalue, due to the scintillation:...
Hello Dominique, ... adjustable slit: at maximum slit) Are you using any additional optics? To get the advantage from a slit, you need some extra optics. If...
... image ... better ... for ... 350D ... Hi Jack Une vielle cartouche d'encre ?............can you explicate me ,but in french please I woud like to make a...
... see the sky background spectrum or is it too faint? ... in more than one frame? ... without aligning, divide by flat,.... ... not dirt on the chip of the...
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