RTOP Apr 2024: M31 & M33 Galaxy HI Measurements

SARA: www.radio-astronomy.org
CHAT:
eduard: For anyone wanting to try M31 and M33, the HI signal from a high velcity cloud could be a good way to get started, refine your processing methods and see if your system is up to the task. Some of the "brightest" of these are the Anticentre Shell (ca. 1.2K with a 3 metre dish) and the H complex (~0.8K)
Jason Burnfield: What are the approximate Celestial Coordinates of these sources? What about "Smith's Cloud"?
eduard: I have to look up the coordinates...
eduard: Yes Smith Cloud is probably a good one as well, but its closer to local HI so a bit tricky
Wolfgang Herrmann: Another test could be to look at the S7 calibration position at l=132° b=-1° . There is a HVC wich can be seen at around -195 km/s which is nicely separated from the local hydrogen.
eduard: Yes thats near H complex
eduard: H complex is centered at l=133, b=+2
Wolfgang Herrmann: Reacted to "H complex is centere..." with 👍
Jason Burnfield: Is there a good online resource for conversion between galactic and celestial coordinates?
Jason Burnfield: The Bonn University H1 survey site will do it but is there another site just for this purpose?
Wolfgang Herrmann: ned.ipac.caltech.edu/forms/ca...
eduard: As long as transformers/ LLMs have this hallucination problem I am quite skeptical of using them for radioastronomy
Wolfgang Herrmann: If you do it more frequently you may want to use one of the python libraries, pyephem or astropy