Available surveys

DIVA currently contains high-level science products (HLSP) for the surveys listed in the following table. If you wish your survey to be available in DIVA, please contact the scientific team.

High-Level Science Products
Survey author Year Survey name Reference paper Note PSF image Reduced image Detection limit Sensitivity map Candidates Download
Masciadri 2005 Masciadri-05 2005ApJ...625.1004M No No Yes No No Archive (46 KB)
Song 2005 Song-HST GO10176, unpublished (a) No Yes No Yes No Archive (48 MB)
Biller 2007 Biller-07 2007ApJS..173..143B No Yes Yes No No Archive (9.7 MB)
Kasper 2007 Kasper-07 2007A&A...472..321K No Yes Yes No No Archive (2.7 MB)
Lafrenière 2007 GDPS 2007ApJ...670.1367L No No Yes No Yes Archive (1.1 MB)
Chauvin 2010 DISYNAS 2010A&A...509A..52C Yes Yes Yes No Yes Archive (422 MB)
Heinze 2010 Heinze-10 2010ApJ...714.1551H (b) No Yes Yes No Yes Archive (33 MB)
Vigan 2012 IDPS-I 2012A&A...544A...9V Yes Yes Yes Yes Yes Archive (731 MB)
Rameau 2013 YoungDusty 2013A&A...553A..60R Yes Yes Yes Yes Yes Archive (125 MB)
Chauvin 2015 NaCo-LP 2015A&A...573A.127C Yes Yes Yes Yes Yes Archive (1.6 GB)
Meshkat 2015 Meshkat-15a 2015ApJ...800....5M (c) No Yes Yes No Yes Archive (9.5 KB)
Meshkat 2015 Meshkat-15b 2015MNRAS.453.2533M (c) No Yes Yes No Yes Archive (19 kB)
Durkan 2016 Durkan-Spitzer 2016ApJ...824...58D (d) Yes Yes Yes No No, but see (d) Archive (636 MB)

Notes:

  1. Song-HST: the results of this HST/NICMOS survey (GO10176) were never published, but the follow-up of most candidates was done in the DISYNAS survey (Chauvin et al. 2010). For a more complete analysis of this survey including the position and contrast of detected candidates, please see the re-analysis of the HST/NICMOS coronagraphic archive by the ALICE project

  2. Heinze-10: The detection limits of this survey are directly provided in apparent magnitude in L- or M-band.

  3. Meshkat-15a, Meshkat-15b: The observations of these two surveys were performed with the NaCo apodizing phase plate (APP), which provides diffraction suppression only on one side of the PSF. The targets were observed at two different dates to cover properly the complete field-of-view. For this reason, no date of observation is reported in the database for all targets except the ones where a candidate companion was detected. For the latter, the date at which the astrometry of the candidates are reported have been used in DIVA for the corresponding observations.

  4. Durkan-Spitzer: The detection limits of this survey are directly provided in apparent Vega magnitude (see Durkan et al. 2016 and Marengo et al. 2009). All candidates with 2 arcseconds have been determined to be either background objects or bad pixels (Durkan et al. 2016)

Available information

For the observations contained in DIVA, the following information can be available. If the information is unknown, the field is empty in the database.

  • target_name: Target name, resolved by SIMBAD
  • radeg: Right ascension of the target; in degrees.
  • dedeg: Declination of the target; in degrees.
  • resolved: Flag defining whether or not the observed target is resolved by SIMBAD. In the few cases when it is not resolved, the observed target is usually the secondary component of a binary that is not registered in SIMBAD with its own ID. In that case, the target name and coordinates are the ones from the primary.
  • PI: Name of the first author or the survey paper.
  • survey: Name of the survey. When no name was attributed in the survey paper, the name is the format PI-yy, with PI the first author name and yy the last two digits of the year of publication.
  • telescope: Name of the telescope used for the observation.
  • instrument: Name of the instrument used for the observation.
  • ut_date: UT date of the observation; in the format YYYY-MM-DD.
  • epoch: Decimal year of the observation; in years.
  • mjd: Modified Julian date of the observation; in days.
  • filter: Filter name used for the observation.
  • wavelength: Wavelength of the filter; in nanometers.
  • bandwidth: Bandwidth of the filter; in nanometers.
  • obs_strategy: Observing strategy of the observation. Three categories are defined: Img = Imaging, Sat-Img = Saturated Imaging, Cor = Coronagraphy.
  • adi: Flag defining whether or not angular differential imaging was used.
  • sdi: Flag defining whether or not spectral differential imaging was used.
  • algo: Type of algorithm used for the data analysis.
  • exposure_time: Exposure time of the observation; in seconds.
  • field_rotation: Amount of field rotation during the observation, if angular differential imaging was used; in degrees.
  • pixel_scale: Pixel scale on the detector; in arcseconds per pixel;
  • candidates: Number of detected candidates.
  • comment: Comment.
  • bibref: Bibliographic reference of the survey paper.
  • hlsp_file: Link to the full HLSP file.

For the detected candidates, the following information is provided when available:

  • target: Target name, resolved by SIMBAD
  • cc: Candidate ID. Usually, for a target and a given survey, the candidate ID is the same between different epochs.
  • date: UT date of the observation; in the format YYYY-MM-DD.
  • sep: Angular separation of the candidate; in arcseconds.
  • sep_err: Error on the angular separation of the candidate; in arcseconds.
  • pa: Position angle of the candidate; in degrees.
  • pa_err: Error on the position angle of the candidate; in degrees.
  • dra: Right ascension offset of the candidate; in arcseconds.
  • dra_err: Error on the right ascension offset of the candidate; in arcseconds.
  • ddec: Declination offset of the candidate; in arcseconds.
  • ddec_err: Error on the declination offset of the candidate; in arcseconds.
  • contrast: Contrast of the candidate in the filter of the observation; in magnitudes.
  • contrast_err: Error on the contrast of the candidate; in magnitudes.
  • snr: signal-to-noise ratio of the candidate.
  • status: status of the candidate; U = undefined, B = background; C = companion; A = ambiguous.