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ALSACAT is my comprehensive catalog of UFO sighting reports in Alsace, the region is the North-East of France, whether they are "explained" or "unexplained".

The ALSACAT catalog is made of case files with a case number, summary, quantitative information (date, location, number of witnesses...), classifications, all sources mentioning the case with their references, a discussion of the case in order to evaluate its causes, and a history of the changes made to the file. A general index and thematic sub-catalogs give access to these Alsatian case files.

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Case of Schiltigheim, on October 1, 2013:

Case number:



A male witness reported to GEIPAN that on October 1, 2013, between 11:15 p.m. and 11:25 p.m., he observed from his/her home the movements of two bluish white lights moving together at random and passing through the clouds. Ten minutes later, the phenomena disappeared, but two hours later, identical lights appeared and then disappeared suddenly.

He wrote for example: "These lights seemed to use the clouds to try to hide themselves, but their light intensity still passed through the clouds even if this intensity was relatively 'soft'."

The witness took some pictures.

GEIPAN put this case in their "B" category as "likely observation of a luminous animation, skyrose type."


Temporal data:

Date: October 1, 2013
Time: 11:15 p.m.
Duration: Minutes.
First known report date: 2013
Reporting delay: Day, weeks.

Geographical data:

Department: Bas-Rhin
City: Schiltigheim
Place: From home, UFO in the sky.
Latitude: 48.606
Longitude: 7.746
Uncertainty ratio: 4 km

Witnesses data:

Number of alleged witnesses: ?
Number of known witnesses: ?
Number of named witnesses: ?
Witness(es) ages: ?
Witness(es) types: ?

Ufology data:

Reporting channel: To the French official UAP study group GEIPAN.
Type of location: From home in city, UFO in the sky.
Visibility conditions: Night
UFO observed: Yes
UFO arrival observed: ?
UFO departure observed: Yes
Entities: No
Photographs: Yes.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: Puzzled.
Witnesses interpretation: ?


Hynek: NL
ALSACAT: Skytracer.



SCHILTIGHEIM (67) 01.10.2013
Observed on: 10/01/2013
Region: Alsace
Department: Rhin (Bas)
Class: B
Summary: SCHILTIGHEIM (67) 10/01/2013. Observations of the meneuvers in a cloudy sky of bluish white lights: probable observation of a luminous show coming from a projector of the Skyrose type.

On October 1, 2013 between 11:15 pm and 11:25 pm a witness observes from his home the movements of two bluish white lights moving together randomly and passing through the clouds. Ten minutes later, the phenomena disappear. Two hours later, identical lights appear and disappear suddenly. The witness took some pictures.

The witness's description of bluish white lights moving together in a random fashion, whose light passes through the clouds, is very much reminiscent of a luminous animation such as discos use. The photos of the witness show that the light spots are visible only on the clouds, proof of a projection of light from the ground. We note however that Wednesday night is an unusual day for this type of animation.

Because of the small strangeness of this phenomenon GEIPAN did not conduct a thorough investigation to find exactly the origin of the phenomenon.

The GEIPAN classifies this case "B": probable observation of a luminous animation, type skyrose.

Report: None.

Details of the testimony
Date of the observation 01-10-2013
Document numer
Sex Male
Environment Home
Weather conditions
Hour of the observation Numbered : 10 p.m. - 00 p.m.
Reference frame
Distance between phenomenon and witness
Start of the observation
End of the observation
Angle of site Middle of the sky; Middle of the sky
Direction of observation Not-specified
Nature of the observation Descriptive terms (lights, etc)
Characteristic of the observation Multiples
Global shape Other shape (comparison)
Color Other (other colors)
Apparente size
Apparent speed
Noise No noise
Effect on the environment
Number 2


Your Observation

We will ask you to provide as much information as possible about your observation. The most important thing is to leave nothing out: it is often the details that make it possible to solve the investigations. Do not hesitate to give the maximum of information, even if your memories are incomplete or that certain elements seem unimportant to you. If you are not sure about this or that detail, tell us about your doubts, but, again, do not omit anything. We need to be able to visualize everything you've seen, like re-running the movie of your observation. Use the end of this page to tell the story of your observation and continue on free paper as much as you want:

Your free account of the observation:

Two white / bluish lights (halo type) randomly 'heading' but remaining close to each other.

These lights seemed to use the clouds to try to hide themselves, but their light intensity still passed through the clouds even if this intensity was relatively 'soft'.

I observed the phenomenon about ten minutes between 11:15 p.m. and 11:25 p.m.

Then the lights stopped.

I see the phenomenon again between 1:15 and 1:25.

At 1:25 the lights disappear suddenly. I stayed awake until 2 a.m. to watch but nothing else appeared in my field of vision.


Images in high resolution are attached, looking like this when sized down to 25%:

The whole set of the original images can be downloaded here (Caution: 10 Mb).


The description and the images are all conform to a discotheque projector, of the "SkyTracer" kind.

At between 2 and 4 km in the south of Schiltigheim, there was, that night, animations, within the "Festival Musica", at the Cité de la Musique et de la Danse of Strasbourg.

It was said:

"Pascal Rambert, Yves Godin and Alexandre Meyer created Memento Mori, an experience much more than a simple show. The experience starts in the absolute darkness... No words could reflect the experience Memento Mori invites the viewers to, a sensorial and peception experience between hypnosis and wonderment." And: "The show includes long periods of total darkness: caution to person sensitive to clautrophobia."

About "Skytracers":


One sometimes call them "discotheque lasers", it is often so in the regional Pres, as a cause of UFO sightings. They are actually not lasers but projectors of ordinary light.

The purpose of these Skytracers is to get attention from far away, up to miles away. Lasers are mostly effective on location, inside a nightclub or on a concert place.


Their light can be white, but it can also have a green, blue, red, yellow hue... Motors are used to move the projections on 1, 2 or 3 axis. By software, they can be programmed to perform sequences of more or less repetitive figures; as witnesses often report.


When there is vapor in the air from the ground up, the Skytracer produces a beam of light, fixed or mobile.

It can produce the impression of a "luminous cigar."


But id a low cloud layer tops a mass of dry air on the ground, there is no visible beam, one sees the projection of the beam on the bottom of the clouds. It is mostly in such conditions that people sometimes are unable to recognize projectors.

With several networked and programmed Skytracers, it is possible de produce shows of the "flying saucer" or "flying saucers formation" kind.



Sources references:

* = Source is available to me.
? = Source I am told about but could not get so far. Help needed.

File history:


Main author: Patrick Gross
Contributors: None
Reviewers: None
Editor: Patrick Gross

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross February 14, 2018 Creation, [gei1].
1.0 Patrick Gross February 14, 2018 First published.

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This page was last updated on February 14, 2018.