| Name: Kevikumar Lad |
| Affiliation: PRL, Ahmedabad |
| Conference ID: ASI2026_473 |
| Title: Illumination stability in radial velocity measurements : Insights from PARAS-2 |
| Abstract Type: Oral |
| Abstract Category: Facilities, Technologies and Data science |
| Author(s) and Co-Author(s) with Affiliation: Kevikumar A. Lad(PRL), Kapil Bharadwaj(PRL), Prasad Neelam(PRL), Nikitha Jithendran(PRL), Abhijit Chakraborty(PRL) |
| Abstract: High precision radial velocity (RV) measurements not only require thermally and mechanically stable spectrograph, but also need uniform illumination of the entrance slit. These illuminations induced effects are critical for extreme precision radial velocity measurements as non-uniformity in slit illuminations introduce drift in radial velocity measurements, which can not be traced using simulteneous wavelength calibration. Therefore, it is important to mitigate the slit non-uniformity by employing special arrangements. Several factors such as atmopsheric effects, telescope guiding , fiber effects, fiber feed etc. can introduce such variations.
PARAS-2 (PRL Advanced Radial velocity Abu-sky Search - 2 ), is the indegeneously developed high resolution spectrograph designed for precision radial velocity measurements. PARAS-2, with resolution ~110000, operates in 380-690 nm waveband and coupled to PRL 2.5m Telescope at PRL Mount Abu Observatory. In my talk, I will present the important details about the different instrumentation aspects, including and design and development of different systems for illumination stability for PARAS-2. |
