From Gaia Science Alerts Working Group
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Preliminary minimal requirements on the photometric and spectroscopic follow-up of Gaia Alerts


  • multi-band photometry, at least two bands (e.g. V,I), Sloan ugriz preferred
  • flux calibration no worse than 10% (0.1 mag)
  • availability of flux measurements within less than couple of hours


  • spectral range minimal: 4500-7000A
  • signal to noise > 20 all over the range above
  • resolution R > 150
  • lambda calibrations better -+ 3A
  • relative flux calibrations better -+10%
  • absolute flux calibrations: none
  • availability of reduced spectra within less than 12h

Current and future instruments suitable for Gaia alerts response

Please expand this list with information on the telescopes/surveys which might be suitable and interested in Gaia alerts follow-up and in operation in years 2012-2017.

Hessman's list of (mainly robotic) telescopes (including ones in preparation).

  • MASTER Robotic Net (Lipunov et al. 2009) limiting mag= 19-20, started in 2002 in Moscow, Russia, followed-up many GCN alerts; now being upgraded to a network all over Russia (1000 clear nights per year).
  • 3 telescopes operated at the Konkoly Observatory, Piszkesteto Mountain Station [1] (Hungary): 50 cm Cassegrain, 60/90/180 cm Schmidt, 1m RCC.