Abstract Details
| Name: IshwaraChandra CH Affiliation: NCRA-TIFR, Pune Conference ID: ASI2019_231 Title : Deep uGMRT 400 MHz observations of XMMLSS region Authors and Co-Authors : Ishwara-Chandra CH, Stefano Andreon and Claudia Cicone Abstract Type : Oral Abstract Category : Extragalactic Astronomy Abstract : Here we present the deep upgraded GMRT (uGMRT) band-3 (250 - 500 MHz) observations of the high-redshift cluster, JKCS01 in the field of XMMLSS. The field was observed with uGMRT band-3 for 25 hours using a bandwidth of 200 MHz with band center of 400 MHz. The data was analysed using the casa based pipeline in nearly automated way. The final resulting image has an rms of 15 microJy/beam at band center of 400 MHz, making this the deepest image at this band, at a resolution of about 6 arcseconds. This rms is within a factor of two of thermal noise, achieved through routine processing using standard features in CASA. We are re-processing the data using advanced flagging algorithms and direction dependent calibration with an aim to reach final rms of 10 microJy/beam. Even with the current already achieved rms noise of 15 microJy/beam, the source density is about 1500 sources per square degree. Several faint submJy sources have optical counterparts with photo-metric redshift larger than 1. We will present the image, source catalog, optical counterparts of submJy sources and other science results from this image. We will also discuss how such a deep, high resolution image at 400 MHz is an excellent preview of science possibilities with SKA1-mid band. |