P1000848 crop
On August 21 the first group of students started their lab exercises of the "Praktikum für Fortgeschrittene (PHY-FP)" of the physics department using the Observatory's new "Kleines Radioteleskop" KRT3. Similar to its predecessor, the antenna of the KRT3 has a diameter of 3 meters, but the receiver is significantly more sensitive. The telescope is a SPIDER300A type marketed by the company Primaluce Lab in Italy. The receiver is optimized for the frequeny of 1420 MHz, enabling the measurement the 21cm line of neutral hydrogen, which is omnipresent in the Milky Way. Using this line, the rotation of our Galaxy can be studied allowing one to draw conclusions on the existence of Dark Matter. Also bright radio sources like Radio galaxies or Supernova remnants can be studied. The students Haron Shaker and Abdul-Rahman Rasul started with test observations to verify the correct working of the telescope pointing and of the receiver electronics. Observing the 21cm line towards different line of sights into the Galactic plane allowed them to measure rotation velocities of the Milky Way in these particular directions. Supervisor Dr. Volker Heesen: "The new telescope is a great advance for familiarizing students with observing techniques in radio astronomy".
 P1000862Image: A. Rasul, V. Heesen, H. Shaker (from left to right)





































Control Panel of the KRT3


hi l50 spider1