1. HI Confusion with the Galaxy
Felix J. Lockman
Susanna Finn
Megan Jackson
Mayumi Sato

2. Dwarf Galaxies Most abundant large-scale objects in the universe.
NGC 1569 close to Galactic plane.
Nearest (post-)starbursting system, possibly part of IC 342 galaxy group.

6. GBT observation ―――― 7:30 - 8:30 PM Let’s call it a night!
Wed, July 15, 2009: 2 – 4 AM (in Arecibo, AST)
1-2 GHz receiver, spectrometer
Rest freq n= MHz (HI), bandwidth DB=12.5 MHz
Freq. switching (Dn=-2.5 MHz) & cal. on-off
First 5 scans for pointing/focusing (3C249.1)
Target: NGC 1569 at l=143o68, b=11o24
Mapped 2o(Dl) x 1o (Db)
17 scans x 3-second integration
Lost internet connection after setup….
Let’s call it a night!
…Thanks Greg! ;-)

7. Data reduction From Arecibo to: GBTIDL @GBT(WV) AIPS @CfA(MA)
…and back to Arecibo!

8. HI Spectrum

9. HI Spectrum

10. Calculating HI Mass

11. Calculating HI Mass
But not rotating and cold . . .