Re: Telling me ***ERROR: No signal for centroid in aperture T1 of image

Posted by ghawkins on Dec 30, 2022; 4:32am
URL: http://astroimagej.170.s1.nabble.com/Telling-me-ERROR-No-signal-for-centroid-in-aperture-T1-of-image-tp2059p2064.html

Hi Karen,

Below are my findings to your questions.

1) Using DP, run a fixed aperture to see if the same problem happens.

DP, Fixed aperture, RA/Dec on, Centroid apertures on, Halt processing on WCS or centroid on:

ERROR - no signal for centroid on first - aborts

2) Using DP, try turning off place by RA/Dec.

DP, Variable aperture, RA/Dec off, Centroid apertures on, Halt processing on WCS or centroid on:

ERROR - no signal for centroid on first image - aborts

3) Using DP, try turning off "Halt Processing on WCS or centroid error".

DP, RA/Dec on, Centroid apertures on, Halt processing on WCS or centroid off:

Processes each image but relative flux values and zero!

3a)

DP, RA/Dec on, Centroid apertures off, Halt processing on WCS or centroid off:

Processes each image but relative flux values are zero!

4) Using DP, try enabling M-plot (below M-Ap).

DP, RA/Dec on, Centroid apertures on, Halt processing on WCS or centroid on:

ERROR - no signal for centroid on first image.

I noticed the drive you are using for the data is the "D" drive. Is that a local drive in your computer, or a USB drive, or a network drive, or something else?

Micro card 256GB

AIJ is clearly centroiding when I manually place the apertures off-center.