|
Re: aperture rules....??
Muhammed Samir Kharusi
What you have to verify upfront: Your major headache is to have a
scope (with flattener) that delivers you a FLAT image field across a 54mm diagonal. Next is whether you can adjust (or the manufacturer adjusts) the orthogonality of the optical axis to your sensor precisely enough. In my own testing on 35mm format I found the issue of sampling or "quality" of the premium optics very secondary to these aspects. All your selections should do an excellent job on- axis, and if the manufacturers selected (i.e. of good repute) can reassure you on the 2 aspects I mentioned above then fine, but first query these specific aspects! --- In ap-gto@..., "Bruce Karbal" <Skyloverz@...> wrote: given in the question |
|
|
|
Re: Exoplanet transit XO-3b in Cam
ayiomamitis
--- In ap-gto@..., "Jim Janusz" <jjanusz@...> wrote:
Hi Jim, Glad you like the result. My AP160 has nailed sixteen such exoplanets and we have a few more to go before we pursue some really wild exoplanet opportunities (mags 13-18 for the parent stars and which noone else is touching). In fact there exist standard modelling programs for exoplanet transits and, now that you mention it, I should look into it. The predictions are good so far for Tuesday and Wednesday of next week and hopefully I can pursue XO-2b (162 min duration, mag 11.18 parent star and 12 mmag depth) and XO-5b (193 min duration, mag 12.13 parent star and 14 mmag depth). This is always a VERY frustrating part of the year ... nice long nights (11+ hrs of darkness) with great transparency but most often cloudy. Anthony.
|
|
|
|
Re: Exoplanet transit XO-3b in Cam
Jim Janusz <jjanusz@...>
Anthony,
toggle quoted message
Show quoted text
Another great data set. I have to say your works of real science with six inches of aperture are impressive. I wonder what would happen if you fed your dataset to Pempro? The statistical modeling in there might show an interesting curve? Jim ----- Original Message -----
From: "ayiomamitis" <ayiomami@...> To: <ap-gto@...> Sent: Sunday, November 23, 2008 9:12 AM Subject: [ap-gto] Exoplanet transit XO-3b in Cam Dear group, |
|
|
|
aperture rules....??
Bruce Karbal <Skyloverz@...>
SO....using a large chip ( 38 mm x 38 mm )for CCD imaging as the given
in the question If aperature rules.....and F- ratio doesn't really affect the axiom BETWEEN...these scopes and my "typical 3 arc second seeing" E-180 ED F2.8 sampling at 4.9 arcsec/pixel A/P Traveler F 6 sampling at 3.9 arcsec/pixel Tak FSQ F 5 sampling at 4.6 arcsec/pixel A/P 130 F 6 sampling at 3.1 arcsec/pixel A/P 140 F 5.7 sampling at 3.1 arcsec/pixel goal being the best resolution WIDE FIELD imaging Opinions from the experts requested thanx bruce |
|
|
|
Exoplanet transit XO-3b in Cam
ayiomamitis
Dear group,
Second time lucky with this particular challenging exoplanet and whose depth is only 9.3 mmag. It is one of the heaviest exoplanets discovered so far with an estimated mass almost twelve times that of Jupiter and in spite of a similar radius (1.2 Jovian radii). For a result based on five hours total time, please see http://www.perseus.gr/Astro- Photometry-XO-3-20081120.htm ... the other four discoveries by the XO team are now slowly becoming seasonal and I hope to have results over the next couple of weeks and as the weather permits. Clear skies! Anthony. |
|
|
|
Re: AP 1200 - snowstorm
S HEGGIE <stuart.j.heggie@...>
Werner, that happens to me a lot up here in Canada - never been a problem. Think about all the dew that runs off everything on a humid evening in warmer weather.
Stuart From: "werner.pribil" <werner.pribil@...> Reply-To: ap-gto@... To: ap-gto@... Subject: [ap-gto] AP 1200 - snowstorm Date: Sun, 23 Nov 2008 16:53:51 -0000 Hello, I have a small roll on/roll off obeservatory in Austria. Yesterday there was a very strong snow storm and afterwards I found a little snow im my obsevatory. I believe that the snow inside of my observatory did not touch my AP 1200, but I am not sure because the snow was melting soon. Do you know how critical is the contact of little snow or water with the AP 1200 (especially the gearbox housings, control box)? Thanks, Werner |
|
|
|
AP 1200 - snowstorm
werner.pribil
Hello,
I have a small roll on/roll off obeservatory in Austria. Yesterday there was a very strong snow storm and afterwards I found a little snow im my obsevatory. I believe that the snow inside of my observatory did not touch my AP 1200, but I am not sure because the snow was melting soon. Do you know how critical is the contact of little snow or water with the AP 1200 (especially the gearbox housings, control box)? Thanks, Werner |
|
|
|
Re: Strange responses to commands
Gavin Bray
It turns out it was the serial/USB converter. What a relief. :-}
--- In ap-gto@..., "Ray Gralak \(Yahoo Groups\)" <yg@...> wrote: because you are using a 13.8 V supply doesn't mean it is actually supplyingthat voltage AND enough electrical current. You should also check that the powercable to the mount is secure and not damaged.to be thinking. Also, have you checked your cable to make sure the pinsare correctly wired?months). 40yahoogroups.com>Lowvoltage and or limited electrical current can cause corruptedcharacters. the<mailto:ap-gto%40yahoogroups.com> ][mailto:ap-gto@...On Behalf Of Gavin Bray reading ofmonitoringconnection, correct COM port etc. I then used serial portsoftware to capture the message exchange (see below). mountgood. Unlessthe keypad documentation the commands from TheSky lookmount look oddI'm misunderstanding something the responses from theand presumably this is why TheSky retries and then gives up. and assume I've messed something up somehow. |
|
|
|
Re: Repost: Mount Rejects Coordinates
mgjr@...
Wade,
toggle quoted message
Show quoted text
Yes, I have 4 USB serial adapters in the observatory machine, all are FTDI chipset. ACP ran all night last night with no issue. This only occurs occasionally, but sometimes when it does, it occurs repeatedly, others once and done. I had had this issue on built in serial ports as well, as multiple different USB serial adapters. Thanks, Mark Quoting Wade Van Arsdale <uwpf23@...>: Hi Mark, |
|
|
|
Re: Strange responses to commands
Roy Uyematsu <roystarman@...>
I can recommend the USB to RS232 converter form IO Gear. Never had a problem
toggle quoted message
Show quoted text
with them. -----Original Message-----
From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Ray Gralak (Yahoo Groups) Sent: Saturday, November 22, 2008 5:31 PM To: ap-gto@... Subject: RE: [ap-gto] Re: Strange responses to commands Hi Gavin, I don't think you should exclude power as the problem yet. Just because you are using a 13.8 V supply doesn't mean it is actually supplying that voltage AND enough electrical current. You should also check that the power cable to the mount is secure and not damaged. That said, it could also be your serial/USB converter like you seem to be thinking. Also, have you checked your cable to make sure the pins are correctly wired? -Ray -----Original Message----- ------------------------------------ To UNSUBSCRIBE, or for general information on the ap-gto list see http://groups.yahoo.com/group/ap-gtoYahoo! Groups Links |
|
|
|
Re: Strange responses to commands
Ray Gralak \(Yahoo Groups\) <yg@...>
Hi Gavin,
toggle quoted message
Show quoted text
I don't think you should exclude power as the problem yet. Just because you are using a 13.8 V supply doesn't mean it is actually supplying that voltage AND enough electrical current. You should also check that the power cable to the mount is secure and not damaged. That said, it could also be your serial/USB converter like you seem to be thinking. Also, have you checked your cable to make sure the pins are correctly wired? -Ray -----Original Message----- |
|
|
|
Re: Strange responses to commands
Gavin Bray
Hi Ray
Thanks for the suggestion. I live in Australia and the nighttime temperature was around 20 degrees celcius so that wouldn't have affected voltage. Also, I'm supplying 13.8V through a regulated power supply. One thing I did find his morning is that the response to the GR command (ie the return current position) changes if I use the keypad to move the mount. So, it doesn't appear to be completely random stuff coming back from the mount. Also, the keypad appears to be working fine and the mount status reported by the keypad is ok. I've tried a different USB port, which made no difference, and I'll pick up another USB-serial converter. Hopefully it's the converter that's playing up. If anyone has any other suggestions please let me know. Gavin --- In ap-gto@..., "Ray Gralak \(Yahoo Groups\)" <yg@...> wrote: little higher voltage, like 15V is probably good for the winter months).Low voltage and or limited electrical current can cause corruptedcharacters.
|
|
|
|
Re: Strange responses to commands
Ray Gralak \(Yahoo Groups\) <yg@...>
Hi Gavin,
toggle quoted message
Show quoted text
Check that you have adequate voltage/power going to the mount (A little higher voltage, like 15V is probably good for the winter months). Low voltage and or limited electrical current can cause corrupted characters. -Ray -----Original Message----- |
|
|
|
Strange responses to commands
Gavin Bray
I've had TheSky6 controlling my AP1200 for a year but after a
computer move I can no longer connect. I've double checked the connection, correct COM port etc. I then used serial port monitoring software to capture the message exchange (see below). I'm not familiar with the protocol but according to my reading of the keypad documentation the commands from TheSky look good. Unless I'm misunderstanding something the responses from the mount look odd and presumably this is why TheSky retries and then gives up. Any suggestions what the problem might be? I doubt it's the mount and assume I've messed something up somehow. Thanks Gavin Port opened by process "TheSky6.exe" (PID: 1864) Request: 22/11/2008 8:29:47 PM.20264 (+33.3140 seconds) 23 3A 55 23 3A 47 52 23 #:U#:GR# Answer: 22/11/2008 8:29:47 PM.32864 (+0.0250 seconds) 67 D9 AC D6 B6 9F 99 A3 9F B9 00 gÙ¬Ö¶Ÿ™£Ÿ¹. Request: 22/11/2008 8:29:47 PM.83264 (+0.5040 seconds) 3A 47 52 23 :GR# Answer: 22/11/2008 8:29:47 PM.85464 (+0.0220 seconds) 67 D9 AC D6 B6 9F 99 A3 9F B9 00 gÙ¬Ö¶Ÿ™£Ÿ¹. Request: 22/11/2008 8:29:48 PM.36264 (+0.5080 seconds) 3A 47 52 23 :GR# Answer: 22/11/2008 8:29:48 PM.38464 (+0.0220 seconds) 67 D9 AC D6 B6 9F 99 A3 9F B9 00 gÙ¬Ö¶Ÿ™£Ÿ¹. Port closed |
|
|
|
Re: Repost: Mount Rejects Coordinates
Mark Galiyano Jr <mgjr@...>
Hi Ray,
toggle quoted message
Show quoted text
Please don't take my conviction to my reality as adversarial :) I am committed to assisting to get to a resolution. I am starting to become confident that ACP somehow precipitates this issue, but I am also confident that ACP isn't doing anything technically wrong. From now forward I'll make every attempt to capture and record serial data surrounding occurances and get them to you. Best Regards, Mark _____ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Ray Gralak Sent: Friday, November 21, 2008 2:29 PM To: ap-gto@... Subject: RE: [ap-gto] Re: Repost: Mount Rejects Coordinates Hi Mark, I've sent *lots* of slew commands in PEMPro and in APCC and I have not seen any rejections of slews, especially not consistently. It would be very helpful if you (or anyone else) could post to the files section a log that demonstrates consistent failures. -Ray -----Original Message-----[mailto:ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com] On Behalf Of Mark Galiyano Jr<mailto:ap-gto%40yahoogroups.com> Subject: [ap-gto] Re: Repost: Mount Rejects Coordinates<http://www.avg.com> com> Version: 8.0.175 / Virus Database: 270.9.9/1803 - Release No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1803 - Release Date: 11/21/2008 9:37 AM |
|
|
|
Re: Repost: Mount Rejects Coordinates
Ray Gralak <rgr@...>
Hi Mark,
toggle quoted message
Show quoted text
I've sent *lots* of slew commands in PEMPro and in APCC and I have not seen any rejections of slews, especially not consistently. It would be very helpful if you (or anyone else) could post to the files section a log that demonstrates consistent failures. -Ray -----Original Message----- |
|
|
|
Re: Repost: Mount Rejects Coordinates
Mark Galiyano Jr <mgjr@...>
Kurt,
Not keyspan, but I am somewhat of a (daytime) RS232 guru and will prevail obtaining data on this issue :) Mark _____ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Kurt Mihalco Sent: Friday, November 21, 2008 11:20 AM To: ap-gto@... Subject: [ap-gto] Re: Repost: Mount Rejects Coordinates Hi Mark, If you happen to be using one of the Keyspan USB->serial adapters, you can use their Serial Assistant to open a Data monitor window to view the raw serial data sent and recieved over the port. Kind of a handy feature, as it loets you see if one of the upstream apps might have an issue corrupting the send or receive data buffers. Good luck, Kurt Mihalco --- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, mgjr@... wrote: I can to collect trace data.log formatting ** vs. :<snip> No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1803 - Release Date: 11/21/2008 9:37 AM |
|
|
|
Re: Repost: Mount Rejects Coordinates
Mark Galiyano Jr <mgjr@...>
Rick,
At one point, I agreed with your statement regarding retries. Now, however, I have seen repeated tries to set the same, and other target coordinates, fail again and again. It certainly seams like a timing, or sequecing issue as Ray and Howard suggest. I don't buy that it is corrupt data, but will rejoyce in any solution:) Mark _____ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Rick Wiggins Sent: Friday, November 21, 2008 12:13 PM To: ap-gto@... Subject: [ap-gto] Re: Repost: Mount Rejects Coordinates Hi Bob, I assume that ACP tries once and then gives the error. This is a problem I have pointed out many times, where one piece of software expects everything to be running perfectly. It would be much better if ACP tried to timeout and resend the command on such errors, although in this case it may be more complicated and require a Query to the mount first before the timeout. Matt Thomas has started putting in some "Failsafe" type functions in his CCDCommander software. I think these things are necessary in an asynchronous software and hardware environment. Maybe you can have some luck with Bob at ACP, but my luck has not been good there. Thanks, Rick --- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, "Bob Holzer" <b.holzer@...> wrote: the software. Here is an example during a Park, but it could beanytime: at line 1732 column 13.the bottom of it. It has also been reported by others on the ACP list. No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1803 - Release Date: 11/21/2008 9:37 AM |
|
|
|
Re: Repost: Mount Rejects Coordinates
Kurt Mihalco
Hi Mark,
If you happen to be using one of the Keyspan USB->serial adapters, you can use their Serial Assistant to open a Data monitor window to view the raw serial data sent and recieved over the port. Kind of a handy feature, as it loets you see if one of the upstream apps might have an issue corrupting the send or receive data buffers. Good luck, Kurt Mihalco --- In ap-gto@..., mgjr@... wrote: I can to collect trace data.log formatting ** vs. :<snip> |
|
|
|
Re: sudden jumps in tracking with 1200GTO
astrotrf2002
--- In ap-gto@..., chris1011@... wrote:
It would be nice to know which axis, but since you don't say, I willguess. Sorry; I buried the information in the middle of a long paragraph. The jumps were east-west (RA). I'm almost certain that your sudden jumps will go away as soon asyou remove all com port inputs to the mount. In other words, I believe that youare getting a command from one of your software programs to move the mount inone of the axes.This is always a possibility, of course. TheSky6 is being used to command the mount. However, since I'm doing an Automapper TPoint run, I unfortunately cannot disconnect the serial cable. If it still does it, then youmade to move the mount.No guiding was being done during the Automapper run. But what I *can* do is disconnect the guider cable to make sure the camera itself is not causing the problem. Thanks for the always-quick response, Roland. I'll report back on the results of an Automapper run with the guide cable disconnected. By the way, I *love* my AP1200 mount. If I confine my TPoint model to just one half of the sky (east or west of the meridian), the pointing error amounts to just 4-1/2 arcminutes RMS before any TPoint model corrections *at all*, and less than 27 arcseconds RMS with just the standard 6 geometric terms applied! And this with a load that is right at the 150-pound rated capacity of the mount. Thanks for *that*, too! Terry |
|
|