II/319 UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
UKIRT Infrared Deep Sky Survey (UKIDSS) Release 9
Lawrence A., Warren S.J., Almaini O., Edge A.C., Hambly N.C., Jameson R.F.,
Lucas P., Casali M., Adamson A., Dye S., Emerson J.P., Foucaud S.,
Hewett P., Hirst P., Hodgkin S.T., Irwin M.J., Lodieu N., McMahon R.G.,
Simpson C., Smail I., Mortlock D., Folger M.
<Mon. Not. R. Astron. Soc. 379, 1599 (2007)>
=2007MNRAS.379.1599L 2007MNRAS.379.1599L
=2013yCat.2319....0L 2013yCat.2319....0L
ADC_Keywords: Surveys ; Infrared sources ; Photometry, infrared
Keywords: surveys - infrared: general
Description:
The UKIRT Infrared Deep Sky Survey (UKIDSS) is a large-scale near-IR
survey which aim is to cover 7500 square degrees of the Northern sky.
The survey is carried out using the Wide Field Camera (WFCAM), with a
field of view of 0.21 square degrees, mounted on the 3.8m United
Kingdom Infra-red Telescope (UKIRT) in Hawaii. The project comprises
five surveys (LAS, GCS, DXS, GPS and UDS).
The Large Area Survey (LAS) covers an area of 4000 square degrees in
high Galactic latitudes (extragalactic) in the four bands Y(1.0um)
J(1.2um) H(1.6um) and K(2.2um) to a depth of K=18.4. This release 9
includes proper motions for a fraction (∼1/6) of the sources.
The Galactic Clusters Survey (GCS) aims to survey ten large open star
clusters and star formation associations, covering a total of 1067
square degrees in the five bands Z (0.9um), Y(1.0um) J(1.2um) H(1.6um)
and K(2.2um), plus a second pass in K for proper motions, to a depth
of Z=20.4, Y=20.3, J=19.5, H=18.6, K=18.6. This release 9
includes proper motions for a fraction (∼1/4) of the sources.
The Deep Extragalactic Survey (DXS) aims to map 35 square degrees of
sky to a 5-σ point-source sensitivity of J=22.3 and K=20.8 in
four carefully selected, multi-wavelength survey areas. The central
regions of each field will also be mapped to H=21.8. The primary aim
of the survey is to produce a photometric galaxy sample at a redshift
of 1-2, within a volume comparable to that of the SDSS, selected in
the same passband (rest frame optical).
Details of the surveys can be found in the in the paper by Lawrence
et al. (2007MNRAS.379.1599L 2007MNRAS.379.1599L), and at the UKIDSS Surveys site
(http://www.ukidss.org/surveys/surveys.html). The data described here
represent a subset of the UKIDSS data, limited to the public data and
most representative columns. In the "Byte-by-byte Description" below
the original names of the columns are given as bracketed names.
Usage of the UKIDSS data:
All users of UKIDSS data should include an acknowledgement in their
publications as follows: "This work is based in part on data obtained
as part of the UKIRT Infrared Deep Sky Survey".
See also:
http://www.ukidss.org/surveys/surveys.html : UKIDSS Surveys
http://surveys.roe.ac.uk/wsa/dr9plus_release.html : UKIDSS-DR9 Release
II/316 : UKIDSS-DR6 Galactic Plane Survey (GPS) (Lucas+ 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
las9.sam 617 1000 Sample of the UKIDSS-DR9 Large Area Survey
(on a total of 82,655,526 sources)
gcs9.sam 708 1000 Sample of the UKIDSS-DR9 Galactic Clusters Survey
(on a total of 54,467,123 sources)
dxs9.sam 268 1000 Sample of the UKIDSS-DR9 Deep Extragalactic Survey
(on a total of 3,003,190 sources)
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Byte-by-byte Description of file: las9.sam
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Bytes Format Units Label Explanations
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1- 19 A19 --- ULAS Name of source in survey (G5)
21- 30 F10.6 deg RAdeg Right ascension (J2000), at Epoch
32- 41 F10.6 deg DEdeg Declination (J2000), at Epoch
43- 48 F6.3 mag Ymag ? UKIDSS Y default magnitude (yAperMag3) (G1)
50- 56 F7.3 mag Jmag1 ? UKIDSS J magnitude in the first epoch
(j_1AperMag3) (G1)
58- 63 F6.3 mag Jmag2 ? UKIDSS J magnitude in the second epoch
(j_2AperMag3) (G1)
65- 70 F6.3 mag Hmag ? UKIDSS H default magnitude (hAperMag3) (G1)
72- 77 F6.3 mag Kmag ? UKIDSS K default magnitude (kAperMag3) (G1)
79- 84 F6.3 mag e_Ymag ? Mean error on Ymag (yAperMag3Err)
86- 91 F6.3 mag e_Jmag1 ? Mean error on Jmag1 (j_1AperMag3Err)
93- 98 F6.3 mag e_Jmag2 ? Mean error on Jmag2 (j_2AperMag3Err)
100-105 F6.3 mag e_Hmag ? Mean error on Hmag (hAperMag3Err)
107-112 F6.3 mag e_Kmag ? Mean error on Kmag (kAperMag3Err)
114-125 I12 --- ID Unique ID of this merged detection (sourceID)
127-127 I1 --- m [1/2] "2" indicates a duplicated source (G6)
129-137 F9.4 yr Epoch Epoch of position measurement (epoch)
139-144 I6 mas e_RAdeg ?=-32768 Uncertainty in RA (sigRa)
146-151 I6 mas e_DEdeg ?=-32768 Uncertainty in Dec (sigDec)
153-159 F7.1 mas/yr pmRA ? Proper motion in RA direction (muRa)
161-167 F7.1 mas/yr pmDE ? Proper motion in Dec direction (muDec)
169-173 F5.1 mas/yr e_pmRA ? Error on RA proper motion (sigMuRa)
175-179 F5.1 mas/yr e_pmDE ? Error on Dec proper motion (sigMuDec)
181-189 F9.4 --- chi2 ? χ-squared value of proper motion
solution (chi2)
191-191 I1 --- nf Number of frames (nFrames)
193-199 F7.2 --- mStat Merged profile class statistic
(mergedClassStat)
201-202 I2 --- cl [-3,1] Merged source class (mergedClass) (G2)
204-207 F4.2 --- p* [0,1] Probability of being a star (pStar)
209-212 F4.2 --- pG [0,1] Probability of being a galaxy (pGalaxy)
214-217 F4.2 --- pN [0,1] Probability of being noise (pNoise)
219-224 F6.3 mag Ytot ? Total point source Y magnitude (yHallMag)
226-235 F10.3 mag e_Ytot ? Mean error on Ytot (yHallMagErr)
237-242 F6.3 mag pYmag ? Petrosian Y magnitude (yPetroMag)
244-253 F10.3 mag e_pYmag ? Mean error on pYmag (yPetroMagErr)
255-261 F7.3 pix Ydiam ? Y-band RMS of ellipse fit (yGausig)
263-266 F4.2 --- Yell [0,1]? Source ellipticity in Y-band (yEll)
268-272 F5.1 deg Ypa [0,180]? Position angle of Y-band ellipse (yPA)
274-275 I2 --- Ybad Y-band zero confidence pixels (yErrBits) (G3)
277-278 I2 --- Ycl [-3,1]? Y-band source class (yClass) (G2)
280-286 I7 --- Yflags [0,8388607]? Y-band flags (yppErrBits) (G4)
288-294 F7.3 mag Jtot1 ? Total point source J magnitude (j_1HallMag)
296-305 F10.3 mag e_Jtot1 ? Mean error on Jtot (j_1HallMagErr)
307-313 F7.3 mag pJmag1 ? Petrosian J magnitude (j_1PetroMag)
315-325 F11.3 mag e_pJmag1 ? Mean error on pJmag (j_1PetroMagErr)
327-333 F7.3 pix Jdiam1 ? J-band RMS of ellipse fit (j_1Gausig)
335-338 F4.2 --- Jell1 [0/1]? J-band ellipticity (G1-b/a) (j_1Ell)
340-344 F5.1 deg Jpa1 [0,180]? J-band position angle (j_1PA)
346-347 I2 --- Jbad1 J-band zero confidence pixels (j_1ErrBits) (G3)
349-350 I2 --- Jcl1 [-3,1]? J-band source class (j_1Class) (G2)
352-358 I7 --- Jflags1 [0,8388607] J-band flags (j_1ppErrBits) (G4)
360-365 F6.3 arcsec Jdx1 ? ξ offset to Y-band source (j_1Xi)
367-372 F6.3 arcsec Jdy1 ? η offset to Y-band source (j_1Eta)
374-379 F6.3 mag Jtot2 ? Total point source J magnitude (j_2HallMag)
381-389 F9.3 mag e_Jtot2 ? Mean error on Jtot (j_2HallMagErr)
391-396 F6.3 mag pJmag2 ? Petrosian J magnitude (j_2PetroMag)
398-405 F8.3 mag e_pJmag2 ? Mean error on pJmag (j_2PetroMagErr)
407-413 F7.3 pix Jdiam2 ? J-band RMS of ellipse fit (j_2Gausig)
415-418 F4.2 --- Jell2 [0/1]? J-band ellipticity (G1-b/a) (j_2Ell)
420-424 F5.1 deg Jpa2 [0,180]? J-band position angle (j_2PA)
426-427 I2 --- Jbad2 J-band zero confidence pixels (j_2ErrBits) (G3)
429-430 I2 --- Jcl2 [-3,1]? J-band source class (j_2Class) (G2)
432-438 I7 --- Jflags2 band flags (j_2ppErrBits) (G4)
440-445 F6.3 arcsec Jdx2 ? ξ offset to Y-band source (j_2Xi)
447-452 F6.3 arcsec Jdy2 ? η offset to Y-band source (j_2Eta)
454-459 F6.3 mag Htot ? Total point source H magnitude (hHallMag)
461-469 F9.3 mag e_Htot ? Mean error on Htot (hHallMagErr)
471-476 F6.3 mag pHmag ? Petrosian H magnitude (hPetroMag)
478-487 F10.3 mag e_pHmag ? Mean error on Hpag (hPetroMagErr)
489-495 F7.3 pix Hdiam ? RMS of ellipse fit in H-band (hGausig)
497-500 F4.2 --- Hell ? Ellipticity in H-band (hEll)
502-506 F5.1 deg Hpa [0,180]? H-band position angle (hPA)
508-509 I2 --- Hbad H-band zero confidence pixels (hErrBits) (G3)
511-512 I2 --- Hcl [-3,1] H-band source class (hClass) (G2)
514-520 I7 --- Hflags [0,8388607] flags (hppErrBits) (G4)
522-527 F6.3 arcsec Hdx ? ξ offset to Y-band source (hXi)
529-534 F6.3 arcsec Hdy ? η offset to Y-band source (hEta)
536-541 F6.3 mag Ktot ? Total point source K magnitude (kHallMag)
543-552 F10.3 mag e_Ktot ? Mean error on Ktot (kHallMagErr)
554-559 F6.3 mag pKmag ? Petrosian K magnitude (kPetroMag)
561-570 F10.3 mag e_pKmag ? Mean error on pKmag (kPetroMagErr)
572-578 F7.3 pix Kdiam ? RMS of ellipse fit in K-band (kGausig)
580-583 F4.2 --- Kell ? K-band ellipticity (kEll)
585-589 F5.1 deg Kpa [0,180]? K-band position angle (kPA)
591-592 I2 --- Kbad K-band zero confidence pixels (kErrBits) (G3)
594-595 I2 --- Kcl [-3,1] K-band source class (kClass) (G2)
597-603 I7 --- Kflags [0,8388607] flags (kppErrBits) (G4)
605-610 F6.3 arcsec Kdx ? ξ offset to Y-band source (kXi)
612-617 F6.3 arcsec Kdy ? η offset to Y-band source (kEta)
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Byte-by-byte Description of file: gcs9.sam
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Bytes Format Units Label Explanations
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1- 19 A19 --- UGCS Name of source in survey (G5)
21- 30 F10.6 deg RAdeg Right ascension (J2000), at Epoch
32- 41 F10.6 deg DEdeg Declination (J2000), at Epoch
43- 48 F6.3 mag Zmag ? UKIDSS Z default magnitude (zAperMag3) (G1)
50- 55 F6.3 mag Ymag ? UKIDSS Y default magnitude (yAperMag3) (G1)
57- 62 F6.3 mag Jmag ? UKIDSS J default magnitude (jAperMag3) (G1)
64- 69 F6.3 mag Hmag ? UKIDSS H default magnitude (hAperMag3) (G1)
71- 76 F6.3 mag Kmag1 ? UKIDSS K default magnitude (k_1AperMag3) (G1)
78- 83 F6.3 mag Kmag2 ? UKIDSS K default magnitude (k_2AperMag3) (G1)
85- 90 F6.3 mag e_Zmag ? Mean error on Zmag (zAperMag3Err)
92- 97 F6.3 mag e_Ymag ? Mean error on Ymag (yAperMag3Err)
99-104 F6.3 mag e_Jmag ? Mean error on Jmag (jAperMag3Err)
106-111 F6.3 mag e_Hmag ? Mean error on Hmag (hAperMag3Err)
113-118 F6.3 mag e_Kmag1 ? Mean error on Kmag (k_1AperMag3Err)
120-125 F6.3 mag e_Kmag2 ? Mean error on Kmag (k_2AperMag3Err)
127-138 I12 --- ID Unique ID of this merged detection (sourceID)
140-140 I1 --- m [1/2] "2" indicates a duplicated source (G6)
142-150 F9.4 yr Epoch Epoch of position measurement (epoch)
152-157 I6 mas e_RAdeg ? Uncertainty in RA (sigRa)
159-164 I6 mas e_DEdeg ? Uncertainty in Dec (sigDec)
166-172 F7.1 mas/yr pmRA ? Proper motion in RA direction (muRa)
174-180 F7.1 mas/yr pmDE ? Proper motion in Dec direction (muDec)
182-186 F5.1 mas/yr e_pmRA ? Error on RA proper motion (sigMuRa)
188-192 F5.1 mas/yr e_pmDE ? Error on Dec proper motion (sigMuDec)
194-202 F9.4 --- chi2 ? {chi-}squared value of proper motion
solution (chi2)
204-204 I1 --- nf Number of frames (nFrames)
206-212 F7.2 --- mStat Merged profile class statistic
(mergedClassStat)
214-215 I2 --- cl [-3,1] Merged source class (mergedClass) (G2)
217-220 F4.2 --- p* [0,1] Probability of being a star (pStar)
222-225 F4.2 --- pG [0,1] Probability of being a galaxy (pGalaxy)
227-230 F4.2 --- pN [0,1] Probability of being noise (pNoise)
232-237 F6.3 mag Ztot ? Total point source Z magnitude (zHallMag)
239-249 F11.3 mag e_Ztot ? Mean error on Ztot (zHallMagErr)
251-256 F6.3 mag pZmag ? Petrosian Z magnitude (zPetroMag)
258-267 F10.3 mag e_pZmag ? Mean error on pZmag (zPetroMagErr)
269-275 F7.3 pix Zdiam ? Z-band RMS of ellipse fit (zGausig)
277-280 F4.2 --- Zell [0,1]? Source ellipticity in Z-band (zEll)
282-286 F5.1 deg Zpa [0,180]? Position angle of Z-band ellipse (zPA)
288-289 I2 --- Zbad Z-band zero confidence pixels (zErrBits) (G3)
291-292 I2 --- Zcl [-3,1]? Z-band source class (zClass) (G2)
294-300 I7 --- Zflags [0,8388607]? Z-band flags (zppErrBits) (G4)
302-307 F6.3 mag Ytot ? Total point source Y magnitude (yHallMag)
309-318 F10.3 mag e_Ytot ? Mean error on Ytot (yHallMagErr)
320-325 F6.3 mag pYmag ? Petrosian Y magnitude (yPetroMag)
327-336 F10.3 mag e_pYmag ? Mean error on pYmag (yPetroMagErr)
338-344 F7.3 pix Ydiam ? Y-band RMS of ellipse fit (yGausig)
346-349 F4.2 --- Yell [0,1]? Source ellipticity in Y-band (yEll)
351-355 F5.1 deg Ypa [0,180]? Position angle of Y-band ellipse (yPA)
357-358 I2 --- Ybad Y-band zero confidence pixels (yErrBits) (G3)
360-361 I2 --- Ycl [-3,1]? Y-band source class (yClass) (G2)
363-369 I7 --- Yflags [0,8388607]? Y-band flags (yppErrBits) (G4)
371-376 F6.3 arcsec Ydx ? ξ offset to Z-band source (yXi)
378-383 F6.3 arcsec Ydy ? η offset to Z-band source (yEta)
385-390 F6.3 mag Jtot ? Total point source J magnitude (jHallMag)
392-400 F9.3 mag e_Jtot ? Mean error on Jtot (jHallMagErr)
402-407 F6.3 mag pJmag ? Petrosian J magnitude (jPetroMag)
409-417 F9.3 mag e_pJmag ? Mean error on pJmag (jPetroMagErr)
419-425 F7.3 pix Jdiam ? J-band RMS of ellipse fit (jGausig)
427-430 F4.2 --- Jell [0/1]? J-band ellipticity (1-b/a) (jEll)
432-436 F5.1 deg Jpa [0,180]? J-band position angle (jPA)
438-439 I2 --- Jbad J-band zero confidence pixels (jErrBits) (G3)
441-442 I2 --- Jcl [-3,1]? J-band source class (jClass) (G2)
444-450 I7 --- Jflags [0,8388607] J-band flags (jppErrBits) (G4)
452-457 F6.3 arcsec Jdx ? ξ offset to Z-band source (jXi)
459-464 F6.3 arcsec Jdy ? η offset to Z-band source (jEta)
466-471 F6.3 mag Htot ? Total point source H magnitude (hHallMag)
473-481 F9.3 mag e_Htot ? Mean error on Htot (hHallMagErr)
483-488 F6.3 mag pHmag ? Petrosian H magnitude (hPetroMag)
490-498 F9.3 mag e_pHmag ? Mean error on Hpag (hPetroMagErr)
500-506 F7.3 pix Hdiam ? H-band RMS of ellipse fit (hGausig)
508-511 F4.2 --- Hell ? Ellipticity in H-band (hEll)
513-517 F5.1 deg Hpa [0,180]? H-band position angle (hPA)
519-520 I2 --- Hbad H-band zero confidence pixels (hErrBits) (G3)
522-523 I2 --- Hcl [-3,1] H-band source class (hClass) (G2)
525-531 I7 --- Hflags [0,8388607] flags (hppErrBits) (G4)
533-538 F6.3 arcsec Hdx ? ξ offset to Z-band source (hXi)
540-545 F6.3 arcsec Hdy ? η offset to Z-band source (hEta)
547-552 F6.3 mag Ktot1 ? Total point source K magnitude (k_1HallMag)
554-563 F10.3 mag e_Ktot1 ? Mean error on Ktot (k_1HallMagErr)
565-570 F6.3 mag pKmag1 ? Petrosian K magnitude (k_1PetroMag)
572-581 F10.3 mag e_pKmag1 ? Mean error on pKmag (k_1PetroMagErr)
583-589 F7.3 pix Kdiam1 ? K-band RMS of ellipse fit (k_1Gausig)
591-594 F4.2 --- Kell1 ? K-band ellipticity (k_1Ell)
596-600 F5.1 deg Kpa1 [0,180]? K-band position angle (k_1PA)
602-603 I2 --- Kbad1 K-band zero confidence pixels (k_1ErrBits) (G3)
605-606 I2 --- Kcl1 [-3,1] K-band source class (k_1Class) (G2)
608-614 I7 --- Kflags1 [0,8388607] flags (k_1ppErrBits) (G4)
616-621 F6.3 arcsec Kdx1 ? ξ offset to Z-band source (k_1Xi)
623-628 F6.3 arcsec Kdy1 ? η offset to Z-band source (k_1Eta)
630-635 F6.3 mag Ktot2 ? Total point source K magnitude (k_1HallMag)
637-644 F8.3 mag e_Ktot2 ? Mean error on Ktot (k_1HallMagErr)
646-651 F6.3 mag pKmag2 ? Petrosian K magnitude (k_1PetroMag)
653-661 F9.3 mag e_pKmag2 ? Mean error on pKmag (k_1PetroMagErr)
663-669 F7.3 pix Kdiam2 ? K-band RMS of ellipse fit (k_1Gausig)
671-674 F4.2 --- Kell2 ? K-band ellipticity (k_1Ell)
676-680 F5.1 deg Kpa2 [0,180]? K-band position angle (k_1PA)
682-683 I2 --- Kbad2 K-band zero confidence pixels (k_1ErrBits) (G3)
685-686 I2 --- Kcl2 [-3,1] K-band source class (k_1Class) (G2)
688-694 I7 --- Kflags2 [0,8388607] flags (k_1ppErrBits) (G4)
696-701 F6.3 arcsec Kdx2 ? ξ offset to Z-band source (k_1Xi)
703-708 F6.3 arcsec Kdy2 ? η offset to Z-band source (k_1Eta)
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Byte-by-byte Description of file: dxs9.sam
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Bytes Format Units Label Explanations
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1- 19 A19 --- UDXS Name of source in survey (G5)
21- 30 F10.6 deg RAdeg Right ascension (J2000)
32- 41 F10.6 deg DEdeg Declination (J2000)
44- 49 F6.3 mag Jmag ? UKIDSS J default magnitude (jAperMag3) (G1)
51- 56 F6.3 mag Kmag ? UKIDSS K default magnitude (k_1AperMag3) (G1)
59- 64 F6.3 mag e_Jmag ? Mean error on Jmag (jAperMag3Err)
66- 71 F6.3 mag e_Kmag ? Mean error on Kmag (k_1AperMag3Err)
73- 84 I12 --- ID Unique ID of this merged detection (sourceID)
86 I1 --- m [1/2] "2" indicates a duplicated source (G6)
89- 94 F6.2 --- mStat Merged profile class statistic
(mergedClassStat)
96- 97 I2 --- cl [-3,1] Merged source class (mergedClass) (G2)
99-102 F4.2 --- p* [0,1] Probability of being a star (pStar)
104-107 F4.2 --- pG [0,1] Probability of being a galaxy (pGalaxy)
109-112 F4.2 --- pN [0,1] Probability of being noise (pNoise)
115-120 F6.3 mag Jtot ? Total point source J magnitude (jHallMag)
122-127 F6.3 mag e_Jtot ? Mean error on Jtot (jHallMagErr)
129-134 F6.3 mag pJmag ? Petrosian J magnitude (jPetroMag)
136-141 F6.3 mag e_pJmag ? Mean error on pJmag (jPetroMagErr)
143-150 F8.3 pix Jdiam ? J-band RMS of ellipse fit (jGausig)
152-155 F4.2 --- Jell [0/1]? J-band ellipticity (1-b/a) (jEll)
157-161 F5.1 deg Jpa [0,180]? J-band position angle (jPA)
163-165 I3 --- Jbad J-band zero confidence pixels (jErrBits) (G3)
167-168 I2 --- Jcl [-3,1]? J-band source class (jClass) (G2)
170-176 I7 --- Jflags [0,8388607] J-band flags (jppErrBits) (G4)
178-183 F6.3 arcsec Jdx ? ξ East-offset to master detection (jXi)
185-190 F6.3 arcsec Jdy ? η North-offset to master detection (jEta)
193-198 F6.3 mag Ktot ? Total point source K magnitude (kHallMag)
200-205 F6.3 mag e_Ktot ? Mean error on Ktot (kHallMagErr)
207-212 F6.3 mag pKmag ? Petrosian K magnitude (kPetroMag)
214-219 F6.3 mag e_pKmag ? Mean error on pKmag (kPetroMagErr)
221-228 F8.3 pix Kdiam ? K-band RMS of ellipse fit (kGausig)
230-233 F4.2 --- Kell ? K-band ellipticity (kEll)
235-239 F5.1 deg Kpa [0,180]? K-band position angle (kPA)
241-243 I3 --- Kbad K-band zero confidence pixels (kErrBits) (G3)
245-246 I2 --- Kcl [-3,1] K-band source class (kClass) (G2)
248-254 I7 --- Kflags [0,8388607] flags (kppErrBits) (G4)
256-261 F6.3 arcsec Kdx ? ξ East-offset to master detection (kXi)
263-268 F6.3 arcsec Kdy ? η North-offset to master detection (kEta)
--------------------------------------------------------------------------------
Global Notes:
Note (G1): recommended magnitude, corrected from a 2.0arcsec aperture
diameter), valid for both point and extended sources.
The filters characteristics are (from Hewett et al. 2006MNRAS.367..454H 2006MNRAS.367..454H)
--------------------------
Z 0.882 ± 0.093 µm
Y 1.031 ± 0.102 µm
J 1.248 ± 0.159 µm
H 1.631 ± 0.292 µm
K 2.201 ± 0.351 µm
--------------------------
Note (G2): The profile classification takes the following values:
-3 = Probable galaxy (with a probability between 70 and 90%)
-2 = Probable star (with a probability between 70 and 90%)
-1 = Star (with a probability ≥ 90%)
0 = Noise (with a probability ≥ 90%)
+1 = Galaxy (with a probability ≥ 90%)
Note (G3): count of the number of zero confidence pixels in the default
(G2arcsec diameter) aperture.
Note (G4): the post-processing error bits are resumed in a number defined
as {Sum}2b, b being the bit number between 0 and 31.
The meaning of b's is as follows:
--------------------------------------------------------------------------
b decimal hexadecimal Meaning
--------------------------------------------------------------------------
2 4 0x00000004 Close to a bright source (not yet implemented)
4 16 0x00000010 Deblended
6 64 0x00000040 Bad pixel(s) in default aperture
15 32768 0x00008000 Source in poor flat field region
16 65536 0x00010000 Close to saturated
17 131072 0x00020000 Photometric calibration probably subject
to systematic error
19 524288 0x00080000 Possible crosstalk artefact/contamination
20 1048576 0x00100000 Possible diffraction spike contamination
22 4194304 0x00400000 Lies within a dither offset of the stacked
frame boundary
--------------------------------------------------------------------------
Note (G5): The correct designation for UKIDSS sources is formed from the
J2000 position truncated to 0.01s in right ascension and 0.1arcsec in
declination:
* ULAS JHHMMSS.ss+DDMMSS.s for the Large Area Survey;
* UGCS JHHMMSS.ss+DDMMSS.s for the Galactic Clusters Survey
* UDXS JHHMMSS.ss+DDMMSS.s for the Deep Extragalactic Survey
Note (G6):
This flag is derived from the original priOrSec and frameSetID attributes:
* m=1 if (priOrSec=0 OR priOrSec=frameSetID) : is a primary source
* m=2 if (priOrSec!=0 AND priOrSec!=frameSetID): the source has
a duplicate in another frameSet.
Acknowledgements:
It is a pleasure to thank Nigel Hambly, who helped in the preparation
of these catalogues.
(End) Francois Ochsenbein, Pierre Ocvirk, G.Landais [CDS] 16-Apr-2013