Attendees: Fred, Sasha, Yohan, Timea, Alex, Sylvain, Nichol, Adam, Leo, Jeff, Tapas, Hongli, Quang, Nathalie, Fabrice, Mélisse,
Not attending: Fabien, Roberto
Minutes from our last telecon
Members and their main interests
by Sasha: spurious sources and reliability of flux measurements
On sky250: No major trend/bias but sizes of small sources can have overestimated and those of large sources could be underestimated.
On SimAlma240: 20% overestimation of the sizes and below S/N=10, measurements are more spread using the MnGSeg/denoised image.
The measurement step done on the original image removes most of the spurious sources (because artefacts are badly measured) and allows a better flux estimate for most sources.
→ detection on the MnGSeg-BSENS image, measurements on the original BSENS image
Ideas for improvement and cautions:
by Jeff: difference maps and wavelet reconstruction residuals
→ We can be confident in extractions done on MnGSeg images.
by Yohan: difference maps
Adjustment of the noise level
TBD: Apply filtering scales to all observed images
* Max recov. scale = ~0.6 x \lambda/Lmin See equation nº6.1 (p53) in https://www.iram.fr/IRAMFR/ARC/documents/cycle1/alma-technical-handbook.pdf
BSENS and CLEANEST are consistent, flat CMF
→ The temperatures of the 3? hot cores have to be estimated through line emission...