A fixed shape fit gives 2714 ppm in QLP raw flux and -65 ppm in QLP spline flux for the Sector 15 dip of TIC 229790952

We tested the reported Sector 15 dimming of TIC 229790952 in public TESS light curves. We fixed a split Gaussian shape from that event before we scanned 40 other QLP sectors. With the same three-day fit, center, and linear background, the original depth is 2714 parts per million (ppm) in QLP raw flux and -65 ppm in QLP spline flux. Two TASOC corrections retain depths of 2751 and 2766 ppm. These products use the same TESS images. Their agreement tests extraction and correction, not a separate instrument. The comparison sectors give two stronger dips and three stronger brightenings with a linear background. A quadratic background gives one and two. Large raw flux trends explain much of this change in fitted rank. A Sector 18 dip at BTJD 1812.677083 gives 2682 ppm with a line and 2367 ppm with a quadratic curve. However, both nearby bright control stars show dips at the same time, with fitted depths of 2886 and 4503 ppm. They do not show comparable dips at the Sector 15 time. Added signals test local recovery of the fixed shape in observed raw flux. We preserve 67 input FITS files with exact URLs and hashes, source code, scan arrays, figures, and instructions. The measured product difference can affect searches for long dips. These results do not establish a comet, a planet, or the physical cause of either event.

TESS · TIC 229790952 · exocomet candidates · light curves · QLP · TASOC · signal recovery · public astronomical data