Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/33813
Titolo: | GAPS: Using the information of the HARPS-N exposure-meter to improve the precision of RV measurements | Autori: | BORSA, Francesco RAINER, Monica PORETTI, Ennio |
Data pubblicazione: | 2013 | Numero: | GAPS-SCI-REP-0006 | Abstract: | While taking a spectrum, if the flux received from the detector is not equally time-distributed while the shutter is open, the Radial Velocity (RV) information we receive can’t be exactly referred to the middle of the exposure. That’s why last generation spectrographs use the information of an exposure-meter to measure the centroid of the flux received vs. time, to correct the time information in case of a change in the seeing conditions during the exposure. The HARPS-N reduction pipeline does not take into account, up to now, the exposure-meter information, using by default the mid-exposure time as the reference value for each exposure. If the information of the exposure-meter centroid in the fits files of HARPS-N (keyword ‘HIERARC EXP_METER_A EXP CENTROID’) is reliable and trustworthy, it’s not difficult to include it in the analysis of the radial velocities (even if it’s not always present). The problem is to correct for the Barycentric Earth Radial Velocity (BERV) at the relative time, in a homogeneous way to the HARPS-N pipeline. With the correction of the BERV at the right time, we can insert the information of the exposure- meter centroid in the RVs estimation of the pipeline, where available. | URI: | http://hdl.handle.net/20.500.12386/33813 | Fulltext: | open |
È visualizzato nelle collezioni: | 4.03 Rapporti di progetto |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
2013_GAPS-SCI-REP-006-expmeter-0.2.pdf | GAPS: report exposure-meter | 300.62 kB | Adobe PDF | Visualizza/apri |
Page view(s)
22
controllato il 18-apr-2024
Download(s)
8
controllato il 18-apr-2024
Google ScholarTM
Check
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.