Application for Observing time
at the Calar Alto Telescopes
- General Information -
Applications for observing time at the 2.2m and
3.5m telescopes for Autumn semester 2018 (July 1 through December 31).
MPIA and Spanish Guaranteed time for 2.2m telescope,
Open time for 2.2m and 3.5m telescopes:
- Earliest date for submission is March 1.
Deadline for Autumn 2018 proposals
- April 4, 2018 23:59:59 CEST
Proposers coming from European countries different than Germany and Spain are
via NorthStar/Opticon. Travel funds are available for accepted OPTICON proposals.
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 telescope
37 nights are offered for Open time.
- 2.2m telescope
Besides the option of buying observing time (see below), for this
semester free Guaranteed (MPIA and Spanish) and Open observing
time is also available. A minimun of 32 nights are offered
for free Open time.
Pursuant the agreement between Max Planck Gesellschaft (MPG) and
Consejo Superior de Investigaciones Cientificas (CSIC), Calar Alto
offers the option to buy observing time at the 2.2m telescope.
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 2018 Autumn
The upgrade of the spectrograph is foreseen to be completed before
July. So, CAFE will be available again for the Autumn 2018
Semester. For the first runs, during the summer, CAFE will be
offered on a shared-risk basis.
- 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 Autumn 2018 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 Autumn 2018
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 Hispano
Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck
Institut für Astronomie and the Instituto de Astrofísica de
- OPTICON funding
This semester up to 10 nights can be available in the 3.5m telescope and
5 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.
- DFG funding
The deadlines for applications for DFG funding are as follows:
Please note: The proposal has to follow the current
format of Sachbeihilfe/Research Grant
as described in the DFG Guidelines 50.01
and has to be submitted via
elan.dfg.de. Please comment
in the project description (form 54.012) on
the relation of the observations to other own
- Spring semester: November 15.
- Autumn semester: May 15.
Find details about: