The star known as "OGLE GD-RRLYR-00099", or "OGLE 99" for short, is located near the constellation of Orion; it lies roughly between the bright stars Betelgeuse and Procyon. Its position is
RA = 06:21:36.69 Dec = +05:26:02.9 (J2000)
The chart below shows its location relative to other nearby stars; the field of view is roughly 20 x 14 arcminutes, or about 0.33 x 0.25 degrees.
The star is roughly magnitude 16.
The images you will be analyzing were kindly provided by Dr. Josep Drudis, who runs a telescope remotely from his home. The telescope is located in Utah, where the skies are very often clear.
Here's a description of the equipment used to acquire the images of OGLE-99.
1. Telescope: Planewave CDK24, 24 inch aperture f/6.5. Focal length 4000 mm 2. Mount: L600 (fork) with equatorial wedge 3. Camera: FLI PL16803, 16803 MPixels 9micron 4. Filter: Photometric V (Baader) 5. Data calibration: CCDStack, v2.92
Our datasets were taken on two nights: Jan 29/30, 2024, and Feb 28/29, 2024. The data provided in the Google Drive for each night is pre-cleaned, so you start measuring the brightness of stars in the images without performing any preliminary processing.