Astrophysical laboratory II

Course objectives

GENERAL OBJECTIVES: The objectives of this course are to provide the knowledge of the astronomical observation techniques, and of theastronomical instrumentation as well as the choice of the astronomical observables. Furthermore, the course aimsat using, and understanting the characteristics of, astrophysical instrumentation for laboratory classes andradio/optical observations. The student will understand the importance of the calibration and of the noisemitigation techniques through a series of experimental classes both in the laboratory and at the radioastronomy/optical-astronomy facilities on the roofs of the Physics department at Sapienza. Basic concepts ofastronomical optics, electronics, signal theory, cryogenics, interferometry, spectroscopics, polarimetry, will bepresented as well as the state of the art of radio, mm, sub-mm, IR, optical, UV, X, gamma instrumentation. SPECIFIC OBJECTIVES: A -Knowledge and understanding OF 1) Know the fundamentals of astronomical observations OF 2) To know the fundamentals of the functioning of astrophysical radiation detectors OF 3) Understand the use of astrophysical radiation detection techniques B -Application skills OF 4) Knowing how to deduce the characteristics of an astrophysical observation OF 5) Solve problems related to noise OF 6) Be able to apply noise reduction techniques / methods C -Autonomy of judgment OF 7) Being able to evaluate the best way to perform a measurement OF 8) Integrate the acquired knowledge in order to establish the best observational techniqueD -Communication skills OF 9) Knowing how to communicate the results of one's work in writing in laboratory reports OF 10) Knowing how to communicate about known and unknown problemsE -Ability to learn OF 11) Have the ability toconsult electronic components datasheets OF 12) Have the ability to evaluate the adequacy of an astrophysics instrument OF 13) Be able to conceive and develop an astronomical project

Channel 1
ELIA STEFANO BATTISTELLI Lecturers' profile

Program - Frequency - Exams

Course program
The course will take place through classroom lectures and 8 laboratory exercises during the semester. The laboratory exercises start about a month after the start of the course and are performed on a weekly basis. The last two exercises will be carried out on the roofs of the buildings of the department and will concern radio astronomy observations and optical astronomy observations. The program consists of: -Astronomical observables and carriers of astrophysical information. Definitions of flux, brightness, and throughput. -Hints of geometric and physical optics and operating principle of lenses, mirrors and antennas. Definition of focal plane, angular response, and field of view. -Hints on the theory of signals, transmission lines, sampling, quantization: Nyquist's theorem. -Detectors in astrophysics (coherent, thermal, and quantum detectors). Astronomical relative and absolute calibrations. -Noise and its physical origin. Extraction of the signal from noise. Outline of analog circuits, transistors, low noise amplifiers. Introduction to digital electronics (microprocessors and FPGAs). -Cryogenic and vacuum techniques. -Fundamental concepts in radio astronomy: Noise and antenna temperature. Radiometer equation. -Telescopes: types, mounts, and aberrations. Using a telescope. - Acquisition of information in databases and processing of astronomical images.
Prerequisites
Basic knowledge of mechanics, electromagnetism, thermodinamics, and statistics
Books
-Handouts of Prof. Battistelli on elearning -Handouts of Prof. de Bernardis on the department web site -Course's slides
Frequency
Attendance of the course is optional but highly recommended. On the other hand, the attendance of laboratory exercises is compulsory and any absence must be adequately justified with the teacher and possibly recovered.
Exam mode
Evalutation is based on the result of the laboratory experience (which are evaluated on each experience) and finally on the oral test. The exam consists of an oral exam on the topics illustrated in the course. In order to pass the exam, the student must be able to submit a topic or repeat a calculation discussed during the course and apply the methods learned in examples and situations similar to those already discussed. The evaluation will take into account: - correctness of the concepts exposed; - clarity and rigor of presentation; - ability to analytically develop the theory; - problem solving attitude (method and results).
Bibliography
https://elearning.uniroma1.it/course/view.php?id=4681 http://www.phys.uniroma1.it/DipWeb/web_disp/d5/index.html
Lesson mode
Lessons in lecture room Laboratory excercitation
  • Academic year2025/2026
  • CoursePhysics
  • CurriculumAstrofisica
  • Year3rd year
  • Semester1st semester
  • SSDFIS/05
  • CFU6