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NorCal Dave replied to the thread Travis Walton case: Crew boss confesses hoax.While I have complete respect for your research skills, I think we need to be careful with this data. Any report made more than a year, if not a couple of months, is likely tainted. By that time the media coverage was already creating the... -
JMartJr reacted to ThomasH's post in the thread 1971 Lake Cote / Lago de Cote UFO Aerial Photo with
Like.
Exactly. I think it might be an artifact in the film, but if was impossible to recreate it too, it would be closer to a debunk. But it's actually possible for it to be an object, that's all I tried to prove. Yes I made the Blender camera with... -
IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.Right, in those days no one even used the term "Schmidt telescope". The focal plane is not accessible from the outside. The Hamburg camera is almost an identical copy of the Palomar Oschin Schmidt camera.
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IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.They *are* routinely detected by large survey telescopes, to this day. And automatically thrown out as space junk. That's why it is important (from my viewpoint) to study them. If nothing else, they have to be removed so the actual astronomical...
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IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.As far as I know, they *are* being detected. They are just throw away by the automatic data processing pipelines, or by the astronomers themselves, as the standard explanation for them is space junk. Modern survey observatories like Rubin and...
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TThomasH replied to the thread 1971 Lake Cote / Lago de Cote UFO Aerial Photo.Exactly. I think it might be an artifact in the film, but if was impossible to recreate it too, it would be closer to a debunk. But it's actually possible for it to be an object, that's all I tried to prove. Yes I made the Blender camera with...
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HoaxEye replied to the thread Transients in the Palomar Observatory Sky Survey.Catalog matching was done. That can be tested: three MNRAS 2022 datasets are published here: http://svocats.cab.inta-csic.es/vanish/ Select the list of vanishing objects in POSS I red images (5,399 rows) and perform a cross-match against Gaia and... -
IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.I understand the Palomar plates aren't available because of policy issues. They are seen as irreplaceable assets. The Applause plates might be available for physical inspection though.
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FatPhil reacted to Ann K's post in the thread Has Something Changed in the Near-Earth Meteoroid Environment? (American Meteor Society analysis) with Like.
That suggests that the questions should be about the witnesses rather than the the objects themselves. Don't discount the possibility of "bandwagon" sightings, the urge to be part of the crowd that makes people say "me too, I saw it" when all... -
IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.There was no other imaging technology at the time. Our challenge is to work with whatever material there was at the time. That's why I love archival astronomy: nothing is easy.
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JMartJr replied to the thread Travis Walton case: Crew boss confesses hoax.If so, thanwhere are the reports from people not on the highway? Anecdotally, we have reason to think more people were out looking at the sky than normal for a chance to see the rather spectacular comet Hale-Bopp, accounting for a lot of people...
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IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.We can always select star images that are not saturated. In the plates I got so far, very few stars are saturated, and these are accounted for by the data analysis software.
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IIvo Busko replied to the thread Transients in the Palomar Observatory Sky Survey.You are right that "stars do not have PSFs", in the sense that starlight gets first smeared by the atmosphere, and only then goes thru the telescope optics and is affected by the PSF. Because atmospheric smearing is orders of magnitude larger...
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JMartJr replied to the thread 1971 Lake Cote / Lago de Cote UFO Aerial Photo.He says: But to explore all avenues, it is worth looking into "If it WAS am object, what properties would it have to have had?" I assume this is derived from properties of the camera/lens?
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HoaxEye reacted to Mendel's post in the thread Transients in the Palomar Observatory Sky Survey with Like.
See Solano(2022). https://academic.oup.com/mnras/article/515/1/1380/6607509?login=false This is explained upthread. Vilarroel references that paper, but it's unclear which of the steps have been applied to her data set, since it doesn't match...