Application for Observing time
at the Calar Alto Telescopes
- General Information -
Applications for observing time at the 2.2m and 3.5m
telescopes for Spring semester 2019 (January 1 through June 30).
Spanish Open Time at the 2.2m and 3.5m
The Principal Investigator (PI) of the proposal and at
least half of the team must be affiliated with a Spanish Institution.
- Earliest date for submission is September 20.
Deadline for Spring 2019 proposals
- October 18, 2018 23:59:59 CEST
Proposers coming from other European countries are kindly asked
via NorthStar/Opticon. Travel funds are available for accepted OPTICON
Please also note the possible different deadlines!
If you would like to get an email reminder in the future to inform
you about the start of the next proposal round, send an email to
notice"at"caha.es with the subject line "CfP subscribe". In the same
way you can unsubscribe from this list with the subject line "CfP unsubscribe".
News and remarks
- 3.5m and 2.2m telescopes
As an ICTS (Spanish Singular Scientific Facility) Calar Alto offers
a minimum of a 20% of the available observing time. Due to the new
status of the observatory, the number of available observing
nights, for the Spanish community, will be larger from 2019. For
this reason, Calar Alto encourages Spanish teams to send their
proposals and take advantage of the new situation.
Calar Alto also offers the option to buy observing time at the
3.5m and 2.2m telescopes.
A separate operations agreement between CAHA A.I.E. and the
respective user institution shall be signed.
For further information, please don't hesitate to contact
CAHA director (firstname.lastname@example.org).
- 1.23m telescope
There is no definite deadline for this telescope.
For any use of the 1.23m telescope, a separate operations
agreement between CAHA A.I.E. and the respective user
institution shall be previously signed. Please, contact
CAHA director (email@example.com)
The main science case of the CARMENES Guaranteed Time Observations
is the detection, follow-up and characterization of planets around
M dwarfs with radial velocities. The agreement between CAHA and
the CARMENES consortium protects this science case. Principal
investigators of Open Time proposals to CARMENES which might
overlap with this science case are encouraged to contact the
CARMENES consortium for collaboration. In all other cases,
arguments explaining why the science case does not overlap should
be provided in the "Astrophysical Context" subsection (8a) of the
CARMENES is also available for Open Time programs in 2019 Spring
After the upgrade of the spectrograph, CAFE will also be
available for the Spring 2019 Semester.
- PANIC- The wide-field infrared camera is not available
The four HAWAII-2RG mosaic of PANIC will be replaced by a new
HAWAII-4RG detector. The upgrade of the camera will be carried out
during the next months and will not be available for this semester.
- PlanetCam- The two-channel (0.38-1.7 microns) lucky-imaging camera
is fully operational at Calar Alto
Although the camera utilization corresponds to its owner (the
Group of Planetary Sciences
GPC of UPV/EHU),
in its visiting instrument mode at Calar Alto Observatoriy, the
use of PlanetCam
can be requested for any other program through a collaboration
with the GPC.
Potential applicants please contact Prof. Agustín
- TWIN and MOSCA
These two instruments are not offered this Spring 2019 semester.
- Visitor, Service A and Service B programmes
CAHA will approve programmes in visitor and service mode. Service
programmes will be executed as A (priority) and B (backup).
Visitor mode proposals will have higher priority to be scheduled.
- Service A: Only for highly ranked proposals. The
observations will be done in queue mode (exceptions see
below) and buffer time is allocated to ensure that the
obtained data set is complete.
- Visitor mode: The observations will be performed by the
visiting astronomer in a fixed period. No buffer time will
be reserved. If the requested observing conditions are
demanding (good seeing, photometric, etc), a back-up
programme should be included. It should be also discussed
and approved by the TAC.
- Service B: These programmes are scheduled as backup, when
all Service A programmes (including those for guaranteed
time) have got their data or they cannot be executed. This
implies that time for these programmes is allocated
generally towards the end of the semester and only
proposals whose objects have the appropriate RA can
be considered, or when medium weather conditions are
- Rules for Open Time service observations
Programmes in service mode are generally performed during service
blocks. Although tentatively observing slots are assigned for each
programme, the observations will be performed in a kind of queue
mode. This gives the observatory more flexibility to react on
changing observing conditions, so that the programmes will benefit
from higher efficiency.
At the 2.2m telescope, due to the cadence requirements of
the Black Hole project in progress, the observations of approved
Open Time programs will be carried out in blocks of no more than
three nights in a row.
In contrast to other instruments, whose configuration can be
changed quickly between one programme and another, PMAS
needs more time for setup changes. This implies that the
configuration cannot be changed during the night and thus a queue
scheduling is difficult, if not impossible. For this reason (and
only for this instrument), the rules for observations
in service mode are changed in the sense that:
- "Service mode" means "delegated service", i.e CAHA staff
will carry out the observations, but on specific dates,
without compensation for weather losses.
- The TAC will approve only programmes requesting whole
nights. Programmes requesting few hours for several nights
will not be approved. They should propose a secondary
program (in the back-up section) for the rest of the night,
which has to be approved by the TAC, and being above the
- If the requested observing conditions are demanding (very
good seeing, photometric night, etc), a back-up programme
should be included, just as in the case of the "Visitor
For instruments different to PMAS, proposals requesting
fraction of nights can be accepted only as "Service mode". They
should be exceptional and very well justified, and should receive
a high grade by the TAC.
- Available instruments for Spring 2019
Calar Alto offers the option of installing your own instrument
at the observatory telescopes. Please contact CAHA director
(firstname.lastname@example.org) well in advance, to consider the feasibility.
- Proprietary period for observing data
All observing data, from Open Time Programs, will be made public
by the Virtual Observatory (VO), Madrid, after a proprietary
period of one year after the end of the observation.
- Report the published articles
Calar Alto Observatory kindly asks you to inform us (email@example.com)
of any publications that makes use of data collected at our
Publications must contain a footnote as follows:
'Based on observations collected at the Centro Astronómico
Hispanico en Andalucía
(CAHA) at Calar Alto, operated jointly by the Andalusian
Universities and the Instituto de Astrofísica de
- OPTICON funding
This semester up to 10 nights can be available in the 3.5m telescope and
10 nights for the 2.2m.
Observers who intend to apply for funding have to submit
their application via the NORTHSTAR tool:
Please note the possible different deadlines.
Find details about: