OTELO

OTELO deep image & Ancillary data

OTELO sources has been obtained ussing a reference image resulting of the combination of all TF, it is an OTELO DEEP image. This image has been processed to obtain the source catalog from wich pseudo spectra has been obtained. The response of the overall TF configuration, taking into account the efficiency of the detector is shown in the right figure. Note that it is a theoretical response which does not takes into account off-center FOV and dirthering effects; despite this simplification, such filter response can be used as a valid characterization of an OTELO DEEP filter and it can be used in combination with ancillary data to obtain photometric redshifts.

Despiste than OTELO have a larger sensibility than any other survey, it requires the use of ancillary data to determine redshift properties of the most of the detected objects.

OTELO TF response

Figure: Theortical overal response of OTELO TF system taken into account the instrument response (variations due to off-center FOV and dirthering not taken into account).

The overall proccess implies:

  • to obtain an OTELO-DEEP image (combining all the images as described before)
  • to reprocess ancillay data images where the the Point Spread Function, PSF, is simillar to the ones of the TF images
  • to mach ancillary data (catalogs) when the image PSFs are worse than TF images

The situation is summarized in the figure.

Status ancillary data

Figure: Overwiev of ancillary data processing

The ancillary data used in OTELO comes from:

Sources of OTELO ancillary data
Band Instrument Type Source Ref Filter Ref.
FUV GALEX Catalog GALEX server AGEIS team LePhare package
NUV GALEX Catalog GALEX server AGEIS team LePhare package
u CFHT/MEGACAM Image TERAPIX CFHT Legacy Survey LePhare package
g CFHT/MEGACAM Image TERAPIX CFHT Legacy Survey LePhare package
F606W HST/ACS (HST V) Image     HST
6500-9000A   Spectra DEEP2 Galaxy redshift survey Newman et al. 2013 ApJSS 208, 5N  
r CFHT/MEGACAM Image TERAPIX CFHT Legacy Survey LePhare package
i CFHT/MEGACAM Image TERAPIX CFHT Legacy Survey LePhare package
F814W HST/ACS (HST I) Image     HST
OTELO-DEEP (8990-9280A) GTC/OSIRIS Image   OTELO survey this pages
z CFHT/MEGACAM Image TERAPIX CFHT Legacy Survey LePhare package
J CFHT/WIRCAM Image TERAPIX (WIRCAM) CFHT Legacy Survey SVO
H CFHT/WIRCAM Image TERAPIX (WIRCAM) CFHT Legacy Survey SVO
Ks CFHT/WIRCAM Image TERAPIX (WIRCAM) CFHT Legacy Survey SVO
3.6 μm Spitzer/IRAC Catalog  

Barro et al. 2011, ApJS 193, 13B (and Barmby et al. 2008 ApJS, 177, 431 in case of no detections)

 LePhare package
4.5 μm Spitzer/IRAC Catalog  

Barro et al. 2011, ApJS 193, 13B (and Barmby et al. 2008 ApJS, 177, 431 in case of no detections)

 LePhare package
5.8 μm Spitzer/IRAC Catalog   Barro et al. 2011, ApJS 193, 13B (and Barmby et al. 2008 ApJS, 177, 431 in case of no detections) LePhare package
8.0 μm Spitzer/IRAC Catalog   Barro et al. 2011, ApJS 193, 13B (and Barmby et al. 2008 ApJS, 177, 431 in case of no detections) LePhare package
24 μm Spitzer/MIPS Catalog PEP survey DR1 PEP survey DR1 Spitzer

100 μm (Pacs.green)

 Herschel/PACS Catalog PEP survey DR1   SVO
160 μm (Pacs.red) Herschel/PACS Catalog PEP survey DR1   SVO
250 μm (PSW_ext) Herschel/SPIRE Catalog HerMES survey   SVO

350 μm (PMW_ext)

 Herschel/SPIRE Catalog HerMES survey   SVO
500 μm (PLW_ext) Herschel/SPIRE Catalog HerMES survey   SVO

In additon, there is a catalog of X-rays, Chandra/ACIS-I instrument, from Pović et al 2009 which is not included in this realase. HST/ACShas been also used for morphological studies, and DEEP2 Galaxy redshift survey spectrospcopy; (Newman et al. 2013 ApJSS 208, 5N) as souce of spectroscopic redshifts.

The nex figure show the filter tranmision of the associated ancillary data; in the asociated link you can download the transmision curves related with the ancillary data.

Filter Transmision curves

Figure: Transmision curves relted with the ancillary data