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• i1999N210j̃tl[\ł悤ɂ邽߂̃t@C
• i1999N25A1999N410XVjGuide Brian Skiff LONEOS \ł悤ɂ邽߂̃t@C
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i1999N914A922XVj100̖ڗd̂߂ TDF t@CްF @̃f[^Zbg_E[hɂ͂NbNĂi 19 KoCgjB̃f[^Zbg Stephen O'Leary Ăꂽ̂łBȉɃRgF

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i1999N712j (12 July 1999) Dataset of alignment stars for the JMI-VGR[_[VXẽACgP̃f[^ZbgF @Steve O'Leary ́AJMI-VŎg30̃ACgP̃Xg񋟂Ă܂B NbN JMI-VACgPf[^i 2koCgj_E[hAGuide ̃fBNgɉ𓀂܂B "Extras" "Toggle User Datasets" "JMI-III setup stars." ܂B

i1999N710jNG[T[AAGNAƂ BL V̂̍XVꂽf[^F @hCc̓nuO Astro-Shop Eric-Sven Vesting ́AGuide ł̂̊͂̃f[^Aŋߗpł悤ɂȂf[^ɍXV悤Ă܂B ͎ Guide CD-ROM ̃vXł̂悤ɂłB܂ł̊ԁAEric Guide ł̃J^O\̂ɕKvȃt@C񋟂Ă܂B

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i1999N69jNew Suspected Variables SupplementiNSVSĵ̒߃f[^\ł悤ɂt@CF @1999N526ɁAJohn Greaves NSVS f[^ĩf[^Zbg̏ڍׂ͂NbNj\ł悤ɂt@C񋟂Ă܂B ނ́Af[^Zbg̒߂̃t@C񋟂Ă܂B̃ACfÁANSVS P "more info" NbNƂAFAd̍\Ȃǂ̃NXt@X̓ʂȃf[^𓾂邱ƂłƂ̂łB ̑SĂ肷ɂ́ANbN "NSVS " t@Ci 60koCgj_E[hAGuidẽfBNgɉ𓀂ĂB

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i1999N520jSloan Astrometric Calibration RegioniX[Vʒ̈ ACRjf[^̕\\ɂt@CF @X[ ACR f[^́AxVʂƑ̂߂ɁAV̐ԓ16̗̈悩ȂĂ܂Bꂼ̗̈́A 7.6xAc3.2xŁARŖ17.2iV17.7j܂ŊSɂ܂B ̃f[^́A this Web siteŌAf[^肷ɂNbNREADME t@C܂B ͓Vʂ̒ɂƂĂɗ܂BCharon ACR g߂̏ڍׂ͂NbNB

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file regionj.dat
title Sloan J Standards

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i1999N311jLX-200 ̃ACgƎQƍP\ł悤ɂt@CF This was prompted by a question from Ove Christensen, who wanted to show the 33 stars the LX-200 can use for alignment, and the 250 stars that can be used for "realignment" to get higher precision. Ove provided the list of 250 stars, and I wrote the .TDF file needed to display them. You can click here to download the files needed (about 5 KBytes).

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Guide Brian Skiff LONEOS ̃f[^\ł悤ɂt@CF Brian SkiffAlXȏ񌹂gݍ킹Lu[VP̑SṼZbg񋟂Ă܂Bނ͂܂łقڒIɍXVĉAŋ߂ł1999N48ŁA21600̍P܂ł܂Bł̂ŁAǂȏꏊłłs̗ǂ̍P邱Ƃłł傤B ŐṼf[^Zbg͈ȉ肷邱Ƃł܂in߂̃Nł́AASCIIt@CŁA 1.5MoCgÃN͈kłŖ430koCg)

ftp://ftp.lowell.edu/pub/bas/starcats/loneos.phot

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[U[ǉf[^Zbgi.TDFjt@C̃hCcŁF Jost Jahn has provided the German-language files needed for the datasets on this page. (Without the files, the data shown when you click on an object or click for "more info" will remain in English.) To get this feature, you'll have to download and unZIP this file (about 18 KBytes) in your Guide directory.

IMO EtB[hF IMOiۗj́ACӂ̏ꏊł̌E肳Pȕ@J܂B́Aނ̊ϑWϑ̑吨̕񍐂邽߂ɕKvƂ̂łB ̕@́A邢RS̍Płł 20 ́uWṽtB[h̃ZbĝłB̗̈Ƃɂ̐ꂽŁAE悤ɂĂ܂B

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Jost Jahn ́Ã|SƂ̐\̂ɕKvȃt@C񋟂Ă܂Bɂ́Ãt@Ci 6koCgj_E[hāAGuide ̃fBNgɉ𓀂܂B

@I[o[Bƃ[U[ǉf[^Zbg̐ŁAJost ͂ǂ炩gȂ΂Ȃ܂B |S̓I[o[Bt@Cŕ\܂B"Overlays" "Toggle Overlays" ɍsAIMOFIELD.UOV on off ܂B Ăꂼ̃tB[h̃eLXgiႦ "IMO field 14" ̂悤Ɂj́A[U[ǉf[^Zbg痈܂B"Extras" "Toggle User-Added Datasets" ɍsA"IMO Limiting Magnitude Fields" off on ܂B

pT[̃J^O\F Alfredo Caronia AGuide pT[̃f[^\łȂq˂Ă܂BVf[^Z^[iADCj FTP TCgTA558 ̃pT[̃J^OA\ .TDF t@C܂B NbNẴt@Ci 72koCgj_E[hĂB̃J^O͂ꂼ̃pT[ɂĖcȗʂ̃f[^^Ă܂B

@Ƃӂ܂Bsɂ́AGuide ɒ[ɒsnhAԌo^^b̃tH[}bgłȂxœǂݎ悤ACKv܂B ̂߃pT[̃f[^Zbg߂ɂ́A98N729o[Wȍ~gȂƂ܂B̃\tg "About Guide" NbNĊmFĂB729ȑOłANbNčŋ߂̃\tg_E[hĂBƁÃf[^Zbg𗘗pł悤ɂȂ܂B

Display of meteor shower radiants: Andrew Gerasimenko, a Guide user in Russia, provided a data file with the RA/decs of meteor shower radiants, plus some comments about each shower. If you download and unZIP this file (about 2 KBytes) to your Guide directory, you will have a new "Meteors" dataset in your list of user-added datasets.

Display of the Bennett catalog: This dataset was provided by Fraser Farrell. You can click here to download BENNETT.ZIP (about 3 KBytes). Following is the note he sent with the catalog:

G'day Bill,

Another list of fuzzies worth adding to Guide.  This was compiled
by the late Jack Bennett (South Africa) as a southern analogue of
the Messier list.  Jack was an experienced comet hunter and deepsky
observer who compiled his list for the same reason Messier did the
"M's". All these objects superficially resemble comets when seen at
low magnification. Note that some objects appear in both lists.

This version was recently obtained from Auke Slotegraaf's "Deepsky
Observers Companion"
(http://members.xoom.com/auke/index.html)  site
- an excellent resource for those who view the More Scenic Half of
the sky :

Printed copies of the Bennett Catalogue have been circulating for
many years; so I guess it can be considered "public domain".  Bill
Bradfield tells me that Jack Bennett distributed it at cost as an
aid to other observers.

I've found it to be a good list for budding deepsky observers.
cheers,
Fraser Farrell

...And, perhaps, also for northerners visiting the Southern Hemisphere.

MPG, a utility for showing data about minor planets: Maroti Tamas, a Guide user in Hungary, has written "MPG" (Minor Planet Guide), a shareware program to display data concerning asteroids. It can use the precomputed orbital data from the Guide CD-ROM. Click here to download the unregistered version of this software.

User-added datasets on Earth maps: One of the big improvements in Guide 6.0 was the ability to add your own datasets to the charts. A few people have mentioned that, for one reason or another, they'd like to show lat/lon datasets on charts of the Earth.

To address that need, the current software supports a new is geo keyword in the .TDF file. If that keyword appears, the dataset will be shown only in the geographic mode. (Also, the "RA" will be interpreted as "longitude".) As an example, if you download and unZIP this file , you'll see triangles displaying (very roughly!) the geographic distribution of Guide users. (Click here for a screen shot of the feature.) The USERS.TDF file should indicate just how this addition works.

A note about the USERS.DAT file, by the way. The distribution within the US is near-perfect; I found a data file that allowed me to convert the ZIP codes (five-digit postal codes) to latitude/longitude values. After adding a small random offset to the result to make sure all users in one post code didn't overlap, I was able to get a nearly exact lat/lon for each US Guide user with a small program.

Things were not so easy in the rest of the world (which is where about half of Guide's users are). I just tried to make sure the users were evenly distributed within their country; if the address stated that a user lives in Italy, for example, a lat/lon was generated at random within Italy. So you can see that there are, for example, about a dozen users in Brazil, but you can't really tell how they're distributed within Brazil. A few "outliers" (the two users in Réunion, the single users in Antarctica, Tahiti, Iran, and so on) were added by hand.

Display of MPC stations on Earth maps: (Updated 11 Mar 1999) Robert Orso has e-mailed files to show the positions of Minor Planet Center (MPC) astrometric observatories. He did this by using a list from the MPC Web site and processing it to convert the data to lat/lon values. Then he used the data in the preceding section on showing lat/lon datasets on Earth charts to tell Guide how this data was to be displayed. If you download and unZIP this file (about 16 KBytes), you will have a new user-added dataset titled "Observatories"; toggling this dataset On will allow you to see them, when in Eclipse mode.

On 11 Mar 1999, this file was updated so that, if you're running a current version of Guide 7.0, you can click on stations and get "more info" about them. (Admittedly, the "info" is of a very limited nature. The file gives nothing but observatory code, lat/lon, parallax constants, altitude above sea level, and the name of the observatory.)

Bitmaps for Ganymede, Callisto, and Iapetus: You may have noticed that when you zoom in on the inner two Galilean moons, Io and Europa, features become visible; but that nothing of this sort happens for Ganymede or Callisto, or for the moons of Saturn, Uranus, or Mars. So far, there have been a total of zero requests for such features. However, you can click here to get data for features of Ganymede, Callisto, and Iapetus (92 KBytes). Download this file and unZIP it in your Guide directory, and zoom in on these objects, and features will appear on them.

I added Ganymede and Callisto so that all four Galilean moons would be handled, and Iapetus because it has an interesting property: the "trailing face" in its orbit reflects about 50% of incoming light. Close up, it would probably look about like chalk. The "leading face", however, reflects about 5% of incoming light, making it look more like asphalt. This was noticed by its discoverer, Jean-Dominique Cassini; he observed that it was about six times brighter when the bright face is toward us (something easily visible in small telescopes).

You'll see that the dividing line between the two faces is quite obvious. The reason for this is still unclear; the best guess is that Japetus is a naturally bright, icy object that has plowed through some dark dust, coating the leading face.

A way to add your own images to Guide: If you have run the Charon astrometric software on an image successfully, then you can easily make sure that Guide will draw that image as a "backdrop" to that part of the sky. To see this in action, run Charon on an image, fiddling with parameters as needed to get Charon working correctly. Once you're happy that you have a correct astrometric match, hit the 'z' key.

That key will cause the message "Entry added to IMAGES.DAT" to appear on Charon's screen. Now, exit Charon and run Guide, and go to the part of the sky covered by that image.

You won't see the image, because they default to being Off. Hit Alt-J, and you'll be prompted to enter a "test flag". Type 10 and click OK. This will toggle between "images shown" and "images off".

Guide will essentially use the results of Charon's astrometric fit to rotate and scale the image to cover the proper area of the sky, much as if it were a RealSky image (in fact, the two are implemented using much the same code in Guide.)

Once I have Guide and Charon properly integrated with one another, the Alt-J/'10' toggle will give way to some more logical system, and this will move off to the "updated software" page.

.TDF file to show the Caldwell Catalog: Harry Jacobson has just provided this file, derived from a copy of the Caldwell catalog posted on the Sky & Telescope Web site. (The Caldwell catalog is a list of 109 objects selected by Patrick Moore, that "extend" the Messier catalog to include southern objects Messier could not see, as well as some bright objects Messier probably should have included in his own catalog but did not.)

A way to use the USNO AC 2000. disk with Guide: The USNO AC 2000.0 CD-ROM contains positions for 4,621,836 stars, from the Astrographic Catalog. As described at the above link, the dataset is available on CD at no charge.

You can display this data in Guide 6.0 or 7.0, as a user-added dataset, using this AC2000.TDF file . Put this file in your Guide directory. Using the AC 2000 is a little clumsier than is the case with most of the user-added datasets on this page, for two reasons.

First, you'll have to copy the AC 2000 (or the declination zones you want) from the AC 2000 CD-ROM, to somewhere on your hard drive. There's no provision for swapping CDs. So unless you have two CD-ROM drives (or possibly a CD-ROM changer), you'll have to copy over the data.

Once you've done this, edit AC2000.TDF. You'll notice that the files are assumed to be in the J:\DATA directory, with lines such as this:

file j:\data\ac_p50.dat

Alter the path accordingly, and you should be ready to go.

At this point, you run into the second minor annoyance with AC 2000: it is broken up into fourteen bands in declination. Use the "Extras... Toggle User Datasets" option, and you'll be confronted, not with one "AC 2000" dataset, but fourteen small datasets, each toggled separately.

A way to use the USNO ACT disk with Guide 6.0 and Charon: On all Guide 7.0 and some Guide 6.0 CD-ROMs, the proper motion data for most Tycho stars has been replaced with proper motions from the USNO ACT (Astrographic Catalog/Tycho) dataset. This dataset improves the precision of proper motions about tenfold. The main cause of imprecision in Tycho is poor quality of the proper motion, so using ACT gives much better accuracy. In fact, the ideal order is to use Hipparcos data if available; ACT data as your next choice; and finally, if all else fails, to resort to Tycho. This is the system Guide now uses.

If you have Guide 7.0, you automatically have this dataset right now; you can ignore this section. But if you have a Guide 6.0 disk, examine the inner ring of the disk. If it says "26741 Z8401R Media by Megasoft", then you have the latest disk; Guide and Charon are already using ACT positions. If you don't have that CD, then using the following will get you exactly the same results, "patching" the Tycho proper motions with ACT data. (It has the advantage, in fact, that Guide can provide both Tycho and ACT data for a star, so you can do a bit of comparison.)

For most people, the lower astrometric quality of Tycho isn't much of an issue. But if you're doing really precise astrometric work (for example, the corrections for asteroid occultations of stars), this suddenly becomes a pretty big issue.

The USNO very kindly provides the ACT CD-ROM for free. If you have such a CD-ROM, you can download this ZIP file (about 58 KBytes) to your Guide directory. UnZIP it, and run the ACT.EXE program. It will ask you for the drive letter for the ACT CD-ROM, and will then take about five to ten minutes to process the data into a 10 MByte file for use with Guide.

The difference in how Guide then behaves will be quite subtle. When you click for "more info" on a star that is in Tycho but not in Hipparcos, you'll get some extra data from the ACT, including a position that is much more precise than the Tycho one. If you then use this star in an occultation, that more precise position will be used, and you'll get a better occultation path. Click here for some example asteroid occultations for test cases. If you don't click for "more info" on the star in question, ACT data won't be used, and you'll get a slightly different path than those shown in the charts on this page.

Also, Charon will automatically make use of this ACT data, whenever you select "Match to Tycho/Hipparcos" in the Settings menu.

.TDF file to show pages from the Atlas Stellarum, Falkauer atlas, and Selected Areas This is another set of .TDF datasets from Jost Jahn . If you are using Guide 7.0, these datasets are already available to you; just click on "Extras... Toggle User Datasets", and you will see that they are installed.

But if you are a Guide 6.0 user, you must download this .ZIP file to your Guide directory (about 18KBytes) and unZIP it. The next time you run Guide, it will automatically add these three datasets in its "Toggle User Dataset" list. (By default, all three are turned off... you will have to turn on whichever atlas(es) interest you.)

These three atlases are of particular interest in Germany (Guide customers in that nation mention them from time to time, but I don't think I've ever heard a US customer mention them.) I'll be providing more details on the nature of these atlases, as soon as I have those details.

Ability to set magnitude limits with .TDF datasets. In the past, user-added datasets had but two states: on (everything shown) and off (nothing at all shown). The sort of "auto" filtering by magnitude, so useful with other datasets, wasn't available.

I can't claim that the handling of this is wonderful now, but at least it's possible to set a magnitude limit in Guide. To do so, edit the .TDF file in question. (For the "example" datasets such as quasars, binary stars, and so on, this file is CD_DATA.TDF.) Look for the particular dataset you're interested in, and add a line such as the following:

mag lim  180  4# Magnitude limit of 18.0 at level 4

What you're doing here is to tell Guide that, at level 4, objects fainter than mag 18 (in this particular dataset) should be suppressed. As with other datasets, this limit will "float" as you zoom in and out; Guide will compute a comparable mag limit for use at other levels, showing fainter objects when you zoom in and dimmer ones as you zoom out.

If you wish, you can instead specify that the magnitude limit be constant for all levels, by specifying "level" -1. For example, the following would cause all objects dimmer than mag 13.6 to be suppressed, no matter what level you are on:

mag lim  136 -1# Magnitude limit of 13.6 at all levels

The logical next question is, "Why is it being made so painful to set a limiting magnitude? How about a nice little dialog box with a list of user-added datasets, where I can select one and then click on some buttons to set "on, off, fixed mag limit, floating mag limit"... and maybe also buttons to toggle labels, and to set the color of a given dataset? Then I could stop playing around with a text editor all the time." And the answer is: That's a good idea, and I expect to do something like that.

Supernovae: This .TDF comes courtesy of Jost Jahn. To use it, you must first download this file to your Guide directory (about 1 Kbyte). Next, you have to get the actual supernova data from the IAU. (The IAU frowns on copying data to your own Web site, and prefers that you just make links to their page. This also makes sure that you're always getting an up-to-date list of supernovae.)

The .TDF file defaults to having the supernovae on, so when you next start up Guide, you'll see the supernovae shown with small red symbols, and labelled with their identifiers.

.TDF file to show data from the IRAS Point Source Catalog (PSC) and Faint Source Catalog (FSC): If you have a copy of the Astronomical Data Center's "Selected Astronomical Catalogs, Volume 1", then you can display these two catalogs in Guide. First, download this .TDF file into your Guide directory (about 4KBytes). Edit the file; you'll notice that the paths to the datasets may need to be changed to match the place where you have copied them. (You'll also notice that this .TDF references the FITS-file versions of the IRAS catalogs, not the text-format versions.)

Both datasets describe the position of each object, with an uncertainty ellipse. Guide has been suitably revised to show this uncertainty ellipse.

.TDF file to show double stars from the Washington Double Star (WDS) catalog If you're using Guide 7.0, you already have this dataset installed; click on "Extras... Toggle User Datasets", and you will see it listed.

But if you are a Guide 6.0 user, you must download this WDS96.TDF file to your Guide directory. Guide will then show double stars from that catalog (which is already sitting on your CD drive). The display is not very good, partly because the WDS does not contain precise positions (1 arcminute accuracy); the .TDF system doesn't support a "double star" system; and because if either component of the double appears in the Tycho or GSC catalogs, you can get an extra star to appear. However, it does partly address a long-standing lack in Guide: the inability to show double stars.

Millennium and Uranometria pages, and RealSky North, South, and Digital Sky Survey plate display: If you're using Guide 7.0, you already have these datasets installed; click on "Extras... Toggle User Datasets", and you will see them listed. But Guide 6.0 users can download and unZIP this file in your Guide directory (about 10 KBytes) to get them. You'll see that your list of .TDF datasets has five new entries. To make use of them, you'll have to first get the latest Guide 6.0 software (at least up to the 10 Feb version), since earlier versions don't support the display of rectangles in .TDFs.

Once you've done that, though, you'll be able to toggle the five new entries, and can click on the labels provided for the pages (or plates) to get more information about them.

(Updated 29 July 1999) AAVSO finder charts: If you download and unZIP this file (about 35 KBytes) , you'll be able to see areas where the AAVSO has created finder charts, and get information about them (when they were last updated, scale, and so forth). You'll notice that the title of this dataset is "AAVSO Finder Charts (New)", to keep it distinct from an older version already on the Guide 7.0 CD.

This dataset was originally provided by Bob Leitner and Charles Scovil, and listed 2696 charts available as of August 1995. (This is the version already existing on Guide 7.0 CDs.) But a lot of charts have been produced since then; Lance Shaw therefore sent in this updated version, which lists 2801 charts. You can download most of these charts, in PostScript or .GIF form, at the AAVSO Web site.

RASNZ/ASSA finder charts: Fraser Farrell has provided a list of RASNZ (Royal Astronomical Society of New Zealand) and ASSA (Astronomical Society of South Australia) variable star finder charts. The list doesn't have RA/dec positions (yet), so you can't get Guide to show you these charts on the screen.

However, if you download and unZIP this file in your Guide directory (about 18K), then when you click for "more info" on a variable star, Guide will tell you if a chart is available from these groups. In some cases, you will also get some RASNZ or ASSA data about the type of variable, its period, and magnitude(s) (photographic, visual, sometimes max/min data).