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Observations with AMBER

Observations with AMBER. General overview P2VM OB preparation with P2PP P2PP / OB / templates Available templates for observation procedure Typical standard OB Outputs : FITS files Guidelines for AMBER observations. VLTI. telescopes. ARAL. finito. delay lines. …. AMBER.

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Observations with AMBER

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  1. Observations with AMBER • General overview • P2VM • OB preparation with P2PP • P2PP / OB / templates • Available templates for observation procedure • Typical standard OB • Outputs : FITS files • Guidelines for AMBER observations

  2. VLTI telescopes ARAL finito delay lines … AMBER opto-mechanics detector Proposal ACCEPTED General overview parameters for observation sequence P2PP Phase 2 Proposal Preparation control BOB Broker for Observation Blocks execute templates sends Observation Blocks (OBs) AMBER software FITS files

  3. P2VM • Pixel to visibility matrix • Needed to calibrate data • Destroyed by spectral instrument configuration modifications • May be time consuming • SENSITIVE POINT: precautions have been taken, all over the observation procedure • to avoid loss of P2VM validity due to unfortunate handling • to allow new P2VM calculation if necessary or required

  4. OB preparation with P2PP (1)P2PP / OB / templates • P2PP • Phase 2Proposal Preparation • Graphical tool to prepare Observation Blocks (OB) • OB • Unitary entity for P2PP • Sequence constituted of several templates • Constraints: • an OB should contain at least an acquisition template and an observation template • only one object by OB (for the moment) • Template • Set of files: parameter + reference + script files • Get astronomer’s input parameters • Actions sequence

  5. OB preparation with P2PP (2)P2PP / OB / templates astronomer’s input parameters via P2PP OB template 1 template 2 template 3 … template n actions actions actions actions OB realisation

  6. OB preparation with P2PP (3)Available templates for observation procedure • Acquisition template • VLTI preset • P2VM check/realisation • AMBER setup • VLTI preset/guiding status check • Image optimisation template • Flux centering on optical fiber heads with ARAL • For each beam, automatic or manual alignment • Flux injection optimisation template • Flux optimisation on optical fiber heads with AMBER detector • Finito injection optimisation, if finito is used as fringe sensor

  7. OB preparation with P2PP (4)Available templates for observation procedure • Fringes search template • P2VM validity check • Fringes tracking with finito, if finito is used as fringe sensor • AMBER fringe search • Fringes centering, if fringes have been found • Observation template • P2VM validity check • Check for fringes, if finito is used • Dark exposure cycle • Object exposure cycle • Sky exposure cycle, if required

  8. OB preparation with P2PP (5)Typical standard OB OB example in 3T mode OB AMBER_3Tstd_acq AMBER_3T_cal_imgopt AMBER_3T_cal_injadj AMBER_3T_cal_frnsrc AMBER_3Tstd_obs_1row image optimisation Flux injection optimisation fringes search acquisition observation

  9. OB preparation with P2PP (6)Outputs : FITS files OB example in 3T mode OB AMBER_3Tstd_acq AMBER_3T_cal_imgopt AMBER_3T_cal_injadj AMBER_3T_cal_frnsrc AMBER_3Tstd_obs_1row column adjustment 1 file dark Nd files Nd * NDITd frames iffringe contrast SNR calculation is done from images, after each OPD step 1 file + + spectral calibration 4 files object Nobj files Nobj * NDITobj frames + + P2VM 10 files Sky, if required Ns files Ns * NDITs frames

  10. Guidelines for AMBER observations • Save observation time minimizing • telescopes pointing changes  telescopes movements • instrumental configuration changes  motors movements / P2VM • Possibility to increase detector read-out speed • to fix turbulence • by limiting detector read-out window size  detector read window size • read pixel number •  minimum DIT (Detector Integration Time)

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