| Name: | Shubhangi Jain |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID: | ASI2025_271 |
| Title: | The FUV Imaging Satellite (FISAT) |
| Authors: | Shubhangi Jain 1 , bharat chandra1 ,Praveen kumar 1 ,shubham jankiram Ghatul 1 , Mahesh Babu S 1 ,Rekhesh Mohan 1,Margarita Safonova 1,Jayant Murthy 1 |
| Authors Affiliation: | 1.Shubhangi Jain , bharat chandra ,Praveen kumar ,shubham jankiram Ghatul , Mahesh Babu S,Rekhesh Mohan ,Margarita Safonova ,Jayant Murthy ( Indian Institute of , Bangalore - 560034, India)
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| Mode of Presentation: | Poster |
| Abstract Category: | Facilities, Technologies and Data science |
| Abstract: | The FUV Imaging Satellite (FISAT) is a compact Far UV telescope designed for daily transient monitoring. It features an 80 mm Ritchey–Chrétien (RC) design, operating in the 130–180 nm range with a 3° field of view. FISAT has a peak effective area of 2.5 cm² and can detect objects as faint as 18 AB (1200 s, SNR = 5). Its spatial resolution is ~6 arcseconds at the field center, combining resolution and compact design to meet the 3.4U size and mass constraints. The 6-12 month survey will focus on capturing novae outbursts and other transient events.Novae, explosive events in cataclysmic binaries caused by thermonuclear runaway reactions on white dwarfs, provide valuable insights into accretion processes, particle acceleration, binary evolution, and galactic chemical evolution. The Andromeda Galaxy (M31), with its high nova rate, is an ideal target for nova studies. Monitoring M31 daily in the far-ultraviolet (FUV) will produce unprecedented light curves, providing key data on nova speed class, peak brightness, and UV flashes. Current UV surveys are limited in depth and cadence, but FISAT’s capabilities, alongside optical observations, will enable the detection of new novae and continuous monitoring of known novae. Daily exposures can detect FUV sources up to 18 magnitudes, increasing the chances of observing short-lived UV flashes, which are rarely captured.FUV surveys can also refine estimates of nova rates and populations, and offer insights into supernova type Ia progenitors. Beyond novae, FISAT may detect other transients like core-collapse supernovae, thermonuclear supernovae, and fast blue optical transients (FBOTs). Additionally, the survey will include a Galactic plane survey, broadening its observational scope beyond M31. |
