Publications based on ESO Data

Publications making use of ESO observational data must include the following statement in a footnote or in the acknowledgement:

Based on observations collected at the European Southern Observatory under ESO programme(s) TP.C-NNNN(R)* or PPP.AAAA.nnn** and/or data obtained from the ESO Science Archive Facility with DOI(s) under***

Please substitute the place-holder (TP.C-NNNN(R) or PPP.AAAA.nnn) with the programme ID(s) of the data used, e.g., 094.A-1234(A) or 105.20UA.001. You will find the identifier in the FITS header of the observations.

* all programmes approved before ESO period 105: TP.C-NNNN(R)
T: leading character indicating the programme type (0=Normal, 1=Large, ...)
P: period (2 digits for P<100, 3 digits for P>=100)
C: category (A, B, C , D, L, ...)
NNNN: four digit integer (unique within each semester)
R: run (A, B, ...)

** as of ESO period 105: PPP.AAAA.nnn
P: period
A: unique identifier composed of numbers and letters
n: number of the run

Please consult the information on ESO Programme and Run Identification Codes for further details.

*** for ESO Science Archive DOIs (Digital Object Identifiers), please substitute NNN with the correct number from the doi column in the table at