J/A+A/563/A80 Wide field imagers ground-based astrometry. V. (Libralato+, 2014)
Ground-based astrometry with wide field imagers.
V. Application to near-infrared detectors: HAWK-I@VLT/ESO.
Libralato M., Bellini A., Bedin L.R., Piotto G., Platais I.,
Kissler-Patig M., Milone A.P.
<Astron. Astrophys. 563, A80 (2014)>
=2014A&A...563A..80L 2014A&A...563A..80L
ADC_Keywords: Positional data ; Atlases ; Clusters, globular ; Galaxies, IR ;
Magellanic Clouds ; Photometry, 102, 65, 62 ; Proper motions
Keywords: instrument: infrared detectors - astrometry -
techniques: image processing - Galaxy: bulge -
globular cluster: genetal - proper motions
Abstract:
High-precision astrometry requires accurate point-spread function
modeling and accurate geometric-distortion corrections. This paper
demonstrates that it is possible to achieve both requirements with
data collected at the High Acuity Wide-field K-band Imager (HAWK-I); a
wide-field imager installed at the Nasmyth focus of UT4/VLT ESO 8m
telescope. Our final astrometric precision reaches ∼3mas per
coordinate for a well exposed star in a single image, with a
systematic error less than 0.1mas. We constructed calibrated
astro-photometric catalogs and atlases of 7 fields: the Baade's
window, NGC 6656, NGC 6121, NGC 6822, NGC 6388, NGC 104, and the James
Webb Space Telescope calibration field (in the LMC). We make these
catalogs and images electronically available to the community.
Furthermore, as a demonstration of the efficacy of our approach,
combining archival material taken with the optical wide-field imager
at the MPI/ESO 2.2m with HAWK-I observations, we are able to achieve
an excellent separation between cluster members and field objects for
NGC 6656 and NGC 6121 with a time base-line of about 8 years. Using
both HST and HAWK-I data, we also study the radial distribution of the
SGB populations in NGC 6656 and conclude that the radial trend is
flat, within our uncertains. We also provide membership probabilities
for most of the stars in NGC 6656 and NGC 6121 catalogs and estimate
membership for the published variable stars in these two fields.
Description:
Astro-photometric catalogs of 7 different fields. For each field we
provide equatorial and pixel coordinates, infrared wide-band
photometry. For NGC 6656 and NGC 6121 we also provide proper motions
and an estimate of the membership probability.
File Summary:
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FileName recl Records Explanations
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ReadMe 80 . This file
baadew_1.dat 266 439090 Baade Windows #1 astro-photometric catalog
baadew_2.dat 152 247938 Baade Windows #2 astro-photometric catalog
ngc6121.dat 398 179365 NGC 6121 astro-photometric catalog with PMs
ngc6822.dat 212 24782 NGC 6822 astro-photometric catalog
ngc6656.dat 338 196498 NGC 6656 astro-photometric catalog with PMs
ngc6388.dat 212 93273 NGC 6388 astro-photometric catalog
jwstcf.dat 212 200346 JWST calib. field astro-photometric catalog
ngc104.dat 212 79315 NGC 104 astro-photometric catalog
hawki.f 81 2062 File with all the Fortran subroutines
fits.dat 125 44 Summary of FITS files (in subdirectory fits)
fits/* . 44 *FITs files
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Note on fits/*: The directory contains the catalogs as astrometrized stacked
images, the geometric-distortion solutions as FITS images (gdhawki*.fits)
and the FITS images that could be used to correct the variation in the
pixel area (pix_area*.fits).
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See also:
J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008)
J/A+A/493/959 : UBV(RI)cHalpha photometry in omega Cen (Bellini+, 2009)
Byte-by-byte Description of file: baadew_1.dat
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Bytes Format Units Label Explanations
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3- 8 I6 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.58)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.58)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/23] Number of images for position
99-104 F6.3 mag J2mag ?=-1 Calibrated J magnitude in 2MASS system (G1)
111-116 F6.3 mag H2mag ?=-1 Calibrated H magnitude in 2MASS system (G1)
123-128 F6.3 mag K2mag Calibrated Ks magnitude in 2MASS system
135-140 F6.3 mag Jmag ?=-1 Calibrated J magnitude in MKO system (G1)
147-152 F6.3 mag Hmag ?=-1 Calibrated H magnitude in MKO system (G1)
159-164 F6.3 mag Kmag Calibrated Ks magnitude in MKO system
171-176 F6.3 mag e_Jmag ?=-1 r.m.s. error in the J magnitude (G1)
183-188 F6.3 mag e_Hmag ?=-1 r.m.s. error in the H magnitude (G1)
196-200 F5.3 mag e_Kmag r.m.s. error in the Ks magnitude
205-206 I2 --- o_Jmag [3/23]?=-1 Number of images for J magnitude (G1)
211-212 I2 --- o_Hmag [3/23]?=-1 Number of images for H magnitude (G1)
217-218 I2 --- o_Kmag Number of images for Ks magnitude
225-230 F6.3 --- q_Jmag [0/1]?=-1 Quality of J PSF-fit (G3)
237-242 F6.3 --- q_Hmag [0/1]?=-1 Quality of H PSF-fit (G3)
250-254 F5.3 --- q_Kmag [0/1] Quality of Ks PSF-fit
259-260 I2 --- Jw [0/1]?=-1 J weed-out flag: 0=rejected, 1=ok (G1)
265-266 I2 --- Hw [0/1]?=-1 H weed-out flag: 0=rejected, 1=ok (G1)
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Byte-by-byte Description of file: baadew_2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 8 I6 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.59)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.59)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/22] Number of images for position
99-104 F6.3 mag K2mag Calibrated Ks magnitude in 2MASS system
111-116 F6.3 mag Kmag Calibrated Ks magnitude in MKO system
124-128 F5.3 mag e_Kmag r.m.s. error in the Ks magnitude
133-134 I2 --- o_Kmag Number of images for Ks magnitude
142-146 F5.3 --- q_Kmag [0/1] Quality of Ks PSF-fit (G3)
152 I1 --- Kw [0/1] Ks weed-out flag: 0=rejected, 1=ok
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Byte-by-byte Description of file: ngc6121.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 8 I6 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.59)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.59)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/79] Number of images for position
99-104 F6.3 mag J2mag Calibrated J magnitude in 2MASS system
111-116 F6.3 mag K2mag ?=-1 Calibrated Ks magnitude in 2MASS
system (G1)
123-128 F6.3 mag Jmag Calibrated J magnitude in MKO system
135-140 F6.3 mag Kmag ?=-1 Calibrated Ks magnitude in MKO system (G1)
147-152 F6.3 mag Bmag ?=-1 Calibrated B magnitude (G1)
159-164 F6.3 mag Vmag ?=-1 Calibrated V magnitude (G1)
171-176 F6.3 mag Rcmag ?=-1 Calibrated Rc magnitude (G1)
184-188 F5.3 mag e_Jmag r.m.s. error in the J magnitude
195-200 F6.3 mag e_Kmag ?=-1 r.m.s. error in the Ks magnitude (G1)
207-212 F6.3 mag e_Bmag ?=-1 r.m.s. error in the B magnitude (G1)
219-224 F6.3 mag e_Vmag ?=-1 r.m.s. error in the V magnitude (G1)
231-236 F6.3 mag e_Rcmag ?=-1 r.m.s. error in the Rc magnitude (G1)
241-242 I2 --- o_Jmag Number of images for J magnitude
247-248 I2 --- o_Kmag ?=-1 Number of images for Ks magnitude (G1)
253-254 I2 --- o_Bmag ?=-1 Number of images for B magnitude (G1)
259-260 I2 --- o_Vmag ?=-1 Number of images for V magnitude (G1)
265-266 I2 --- o_Rcmag ?=-1 Number of images for Rc magnitude (G1)
274-278 F5.3 --- q_Jmag [0/1] Quality of J PSF-fit (G3)
285-290 F6.3 --- q_Kmag [0/1]?=-1 Quality of Ks PSF-fit (G3)
297-302 F6.3 --- q_Bmag [0/1]?=-1 Quality of B PSF-fit (G3)
309-314 F6.3 --- q_Vmag [0/1]?=-1 Quality of V PSF-fit (G3)
321-326 F6.3 --- q_Rcmag [0/1]?=-1 Quality of Rc PSF-fit (G3)
332 I1 --- Jw [0/1] J weed-out flag: 0=rejected, 1=ok
337-338 I2 --- Kw [0/1]?=-1 Ks weed-out flag: 0=rejected, 1=ok (G1)
344-350 F7.3 mas/yr pmRA ?=99 Proper motion along RA, pmRAcosDE (G2)
357-362 F6.3 mas/yr e_pmRA ?=99 Proper motion r.m.s. along RA,
pmRAcosDE (G2)
368-374 F7.3 mas/yr pmDE ?=99 Proper motion along DE (G2)
381-386 F6.3 mas/yr e_pmDE ?=99 Proper motion r.m.s. along DE (G2)
390-392 I3 --- Np ?=-1 Number of image pairs to compute PM (G2)
397-398 I2 --- Mmb [0/99]?=-1 Membership probability (G1)
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Byte-by-byte Description of file: ngc6822.dat
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Bytes Format Units Label Explanations
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4- 8 I5 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.59)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.59)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
92 I1 --- Nim [3/8] Number of images for position
99-104 F6.3 mag J2mag Calibrated J magnitude in 2MASS system
111-116 F6.3 mag K2mag ?=-1 Calibrated Ks magnitude in 2MASS system (G1)
123-128 F6.3 mag Jmag Calibrated J magnitude in MKO system
135-140 F6.3 mag Kmag ?=-1 Calibrated Ks magnitude in MKO system (G1)
148-152 F5.3 mag e_Jmag r.m.s. error in the J magnitude
159-164 F6.3 mag e_Kmag ?=-1 r.m.s. error in the Ks magnitude (G1)
170 I1 --- o_Jmag Number of images for J magnitude
175-176 I2 --- o_Kmag ?=-1 Number of images for Ks magnitude (G1)
184-188 F5.3 --- q_Jmag [0/1] Quality of J PSF-fit (G3)
195-200 F6.3 --- q_Kmag [0/1]?=-1 Quality of Ks PSF-fit (G3)
206 I1 --- Jw [0/1] J weed-out flag: 0=rejected, 1=ok
211-212 I2 --- Kw [0/1]?=-1 Ks weed-out flag: 0=rejected, 1=ok (G1)
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Byte-by-byte Description of file: ngc6656.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 8 I6 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.80)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.80)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/23] Number of images for position
99-104 F6.3 mag K2mag Calibrated Ks magnitude in 2MASS system
111-116 F6.3 mag Kmag Calibrated Ks magnitude in MKO system
123-128 F6.3 mag Bmag ?=-1 Calibrated B magnitude (G1)
135-140 F6.3 mag Vmag ?=-1 Calibrated V magnitude (G1)
147-152 F6.3 mag Imag ?=-1 Calibrated I magnitude (G1)
159-164 F6.3 mag e_Kmag r.m.s. error in the Ks magnitude
171-176 F6.3 mag e_Bmag ?=-1 r.m.s. error in the B magnitude (G1)
183-188 F6.3 mag e_Vmag ?=-1 r.m.s. error in the V magnitude (G1)
195-200 F6.3 mag e_Imag ?=-1 r.m.s. error in the I magnitude (G1)
205-206 I2 --- o_Kmag Number of images for Ks magnitude
211-212 I2 --- o_Bmag ?=-1 Number of images for B magnitude (G1)
217-218 I2 --- o_Vmag ?=-1 Number of images for V magnitude (G1)
223-224 I2 --- o_Imag ?=-1 Number of images for I magnitude (G1)
232-236 F5.3 --- q_Kmag [0/1] Quality of Ks PSF-fit (G3)
243-248 F6.3 --- q_Bmag [0/1]?=-1 Quality of B PSF-fit (G3)
255-260 F6.3 --- q_Vmag [0/1]?=-1 Quality of V PSF-fit (G3)
267-272 F6.3 --- q_Imag [0/1]?=-1 Quality of I PSF-fit (G3)
278 I1 --- Kw [0/1] Ks weed-out flag: 0=rejected, 1=ok
284-290 F7.3 mas/yr pmRA ?=99 Proper motion along RA, pmRAcosDE (G2)
297-302 F6.3 mas/yr e_pmRA ?=99 Proper motion r.m.s. along RA,
pmRAcosDE (G2)
308-314 F7.3 mas/yr pmDE ?=99 Proper motion along DE (G2)
321-326 F6.3 mas/yr e_pmDE ?=99 Proper motion r.m.s. along DE (G2)
330-332 I3 --- Np ?=-1 Number of image pairs to compute PM (G2)
337-338 I2 --- Mmb [0/99]?=-1 Membership probability (G1)
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Byte-by-byte Description of file: ngc6388.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
4- 8 I5 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.79)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.79)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/22] Number of images for position
99-104 F6.3 mag J2mag ?=-1 Calibrated J magnitude in 2MASS system (G1)
111-116 F6.3 mag K2mag Calibrated Ks magnitude in 2MASS system
123-128 F6.3 mag Jmag ?=-1 Calibrated J magnitude in MKO system (G1)
135-140 F6.3 mag Kmag Calibrated Ks magnitude in MKO system
147-152 F6.3 mag e_Jmag ?=-1 r.m.s. error in the J magnitude (G1)
160-164 F5.3 mag e_Kmag r.m.s. error in the Ks magnitude
169-170 I2 --- o_Jmag ?=-1 Number of images for J magnitude (G1)
175-176 I2 --- o_Kmag Number of images for Ks magnitude
183-188 F6.3 --- q_Jmag [0/1]?=-1 Quality of J PSF-fit (G3)
196-200 F5.3 --- q_Kmag [0/1] Quality of Ks PSF-fit (G3)
205-206 I2 --- Jw [0/1]?=-1 J weed-out flag: 0=rejected, 1=ok (G1)
212 I1 --- Kw [0/1] Ks weed-out flag: 0=rejected, 1=ok
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Byte-by-byte Description of file: jwstcf.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 8 I6 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.79)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.79)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/22] Number of images for position
99-104 F6.3 mag J2mag Calibrated J magnitude in 2MASS system
111-116 F6.3 mag K2mag ?=-1 Calibrated Ks magnitude in 2MASS system (G1)
123-128 F6.3 mag Jmag Calibrated J magnitude in MKO system
135-140 F6.3 mag Kmag ?=-1 Calibrated Ks magnitude in MKO system (G1)
148-152 F5.3 mag e_Jmag r.m.s. error in the J magnitude
159-164 F6.3 mag e_Kmag ?=-1 r.m.s. error in the Ks magnitude (G1)
169-170 I2 --- o_Jmag Number of images for J magnitude
175-176 I2 --- o_Kmag ?=-1 Number of images for Ks magnitude (G1)
184-188 F5.3 --- q_Jmag [0/1] Quality of J PSF-fit (G3)
195-200 F6.3 --- q_Kmag [0/1]?=-1 Quality of Ks PSF-fit (G3)
206 I1 --- Jw [0/1] J weed-out flag: 0=rejected, 1=ok
211-212 I2 --- Kw [0/1]?=-1 Ks weed-out flag: 0=rejected, 1=ok (G1)
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Byte-by-byte Description of file: ngc104.dat
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Bytes Format Units Label Explanations
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4- 8 I5 --- ID ID number of the star
11- 23 F13.9 deg RAdeg Right ascension (J2000, Epoch J2007.91)
26- 38 F13.9 deg DEdeg Declination (J2000, Epoch J2007.91)
43- 50 F8.3 pix Xpos x master frame position (distortion free)
55- 62 F8.3 pix Ypos y master frame position (distortion free)
70- 74 F5.3 pix e_Xpos r.m.s. error in the x-position
82- 86 F5.3 pix e_Ypos r.m.s. error in the y-position
91- 92 I2 --- Nim [3/23] Number of images for position
99-104 F6.3 mag J2mag Calibrated J magnitude in 2MASS system
111-116 F6.3 mag K2mag ?=-1 Calibrated Ks magnitude in 2MASS system (G1)
123-128 F6.3 mag Jmag Calibrated J magnitude in MKO system
135-140 F6.3 mag Kmag ?=-1 Calibrated Ks magnitude in MKO system (G1)
148-152 F5.3 mag e_Jmag r.m.s. error in the J magnitude
159-164 F6.3 mag e_Kmag ?=-1 r.m.s. error in the Ks magnitude (G1)
169-170 I2 --- o_Jmag Number of images for J magnitude
175-176 I2 --- o_Kmag ?=-1 Number of images for Ks magnitude (G1)
184-188 F5.3 --- q_Jmag [0/1] Quality of J PSF-fit (G3)
195-200 F6.3 --- q_Kmag [0/1]?=-1 Quality of Ks PSF-fit (G3)
206 I1 --- Jw [0/1] J weed-out flag: 0=rejected, 1=ok
211-212 I2 --- Kw [0/1]?=-1 Ks weed-out flag: 0=rejected, 1=ok (G1)
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Byte-by-byte Description of file: fits.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg ? Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg ? Declination of center (J2000)
20- 24 F5.3 arcsec/pix scale [0.107]? Scale of the image
26- 30 I5 --- Nx [2048/11000] Number of pixels along X-axis
32- 36 I5 --- Ny [2048/11000] Number of pixels along Y-axis
38- 43 I6 Kibyte size [16388/472660] Size of FITS file
45- 64 A20 --- FileName Name of FITS file, in "fits" subdirectory
66-125 A60 --- Title Title of FITS file
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Global notes:
Note (G1): Values are flagged to -1 when their measures are not available.
Note (G2): Values are flagged to 99 when their measures are not available.
Note (G3): the quality of the PSF fit (QFIT) is close to zero for well
measured stars (typically QFIT≤0.05), and is close to unity for
badly measured or non star-like sources.
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Acknowledgements:
Mattia Libralato, mattia.libralato(at)studenti.unipd.it
References:
Anderson et al., Paper I 2006A&A...454.1029A 2006A&A...454.1029A
Yadav et al., Paper II 2008A&A...484..609Y 2008A&A...484..609Y, Cat. J/A+A/484/609
Bellini et al., Paper III 2009A&A...493..959B 2009A&A...493..959B, Cat. J/A+A/493/959
Bellini & Bedin, Paper IV 2010A&A...517A..34B 2010A&A...517A..34B
(End) Patricia Vannier [CDS] 14-Jan-2014