Author Topic: Call for images - Testing new plate solving and annotation features  (Read 470 times)

Online Juan Conejero

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Hi all,

We are currently implementing new features in our plate solving and annotation scripts, and lack the necessary real-world data to test them thoroughly. We'd appreciate if you could provide us with images suitable for testing these features. We need images that comply with the following requisites:

- Required: Acquisition time metadata. We need to know the date the image was acquired, accurate to within one minute if possible in the case of inner planets (see below), or to within one hour or so for the rest of objects. For example, if your image has been acquired in FITS format and has a valid DATE-OBS header keyword generated by your acquisition software, that would be ideal.

- Required: Images with planets and/or asteroids. The new features that we are testing involve calculation of high-accuracy solar system ephemerides, which we must test against real data. We need images with:

- One or more of: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.

- One or more of the 343 most massive asteroids included in DE430's numerical integration—see the list attached to this post as a plain text file, which you can open in PixInsight's Script Editor. For example, if you have images covering relatively large areas of the Ecliptic, the probability that you have recorded one of these asteroids is high. In such case, even if you don't know whether you have one of these asteroids in the image or not, you can send it to us if it complies with the rest of requirements.

- Geodetic coordinates of the observer. It would be great if you could provide at least the approximate longitude and latitude (also height if possible) of the location where the image was acquired.

- Linear images. To perform the accurate plate solving and measurement tasks that we need to test the new features, we need unstretched (linear) images. We cannot perform valid PSF measurements on stretched images.

Thank you so much in advance!
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Online Juan Conejero

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I forgot to mention something I thought was obvious (since we are speaking of plate solving), but maybe it is not. We need deep-sky images, not planetary images. That is, we need deep-sky images with stars and planets and/or asteroids, as described in my yesterday's post. Sorry for the potential confusion.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Offline RickS

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Hi Juan,

I have some test subs at fairly short focal length (image scale a few arcsec/pixel) with Saturn near M8/M20.  Are they useful?

Cheers,
Rick.

Online Juan Conejero

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Yes, absolutely! Thank you Rick.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Offline RickS

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I'll upload a few to Dropbox tonight and send you a link...

Offline ngc1535

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Juan,

I can provide many high quality images across many platescales that satisfy your needs.

1. Are you looking for calibrated images? (or raw?)
2. Is there a repository you are maintaining or do we provide links from our own places?
3. Do you require temporal series of like images? In other words...I am certain some of the ecliptic data will have some of the asteroids. Do you want a series of sequential images to show moving objects for confirmation or is a single image good enough?

-adam

Online Juan Conejero

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Hi Adam,

Thank you so much!

Quote
1. Are you looking for calibrated images? (or raw?)

Calibrated images. I have to perform accurate PSF measurements. The higher the SNR, the better.

Quote
2. Is there a repository you are maintaining or do we provide links from our own places?

Please provide a link if you can, or upload the images to some cloud storage service such as dropbox.

Quote
3. Do you require temporal series of like images?

Not necessarily, but if you have a sequence of frames with the same object(s), that is great for verification of accuracy in ephemeris calculations.

These tests are intended to verify experimentally the robustness of a new version of our plate solving script, which implements a new distortion modeling algorithm of unprecedented accuracy. I am also working on a new version of the annotation script able to identify and annotate solar system objects. These tests are a great test bench for the whole set of astrometry tools that will be available in the next version of PixInsight, including the integrated solar system ephemerides, position reduction and plate solving subsystems. In addition, the new local distortion correction modeling capabilities are essential for the astrometry-based mosaic generation tool that I plan on releasing soon. So this is indeed important :)
Juan Conejero
PixInsight Development Team
http://pixinsight.com/