J/MNRAS/373/781 JHK photometry of faint standard stars (Leggett+, 2006) ================================================================================ JHK observations of faint standard stars in the Mauna Kea Observatories near-infrared photometric system. Leggett S.K., Currie M.J., Varricatt W.P., Hawarden T.G., Adamson A.J., Buckle J., Carroll T., Davies J.K., Davis C.J., Kerr T.H., Kuhn O.P., Seigar M.S., Wold T. =2006MNRAS.373..781L ================================================================================ ADC_Keywords: Stars, faint ; Photometry, infrared Keywords: instrumentation: photometers - methods: observational - techniques: photometric - infrared: stars Abstract: JHK photometry in the Mauna Kea Observatories (MKO) near-infrared system is presented for 115 stars. Of these stars, 79 are United Kingdom Infrared Telescope (UKIRT) standards from Hawarden et al. (2001MNRAS.325..563H), and 42 are Las Campanas Observatory (LCO, or NICMOS) standards from Persson et al. The average brightness of the sample in all three bandpasses is 11.5mag, with a range between 10 and 15. The average number of nights each star was observed is 4, and the average of the internal error of the final results is 0.011mag. These JHK data agree with those reported by other groups to 0.02mag, for stars in common, which is consistent with the uncertainties. The measurements are used to derive colour transformations between the MKO JHK photometric system and the UKIRT, LCO and Two Micron All-Sky Survey (2MASS) systems. Description: The sample consists primarily of UKIRT Faint Standards (Hawarden et al., 2001MNRAS.325..563H) and Las Campanas (LCO, or NICMOS) standards (Persson et al., 1998AJ....116.2475P). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 74 115 Standard stars refs.dat 122 28 References table3.dat 68 115 Measured MKO JHK magnitudes -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- FS ?=- UKIRT FS number 5- 21 A17 --- Name Name 23- 24 I2 h RAh Right ascension (J2000) 26- 27 I2 min RAm Right ascension (J2000) 29- 32 F4.1 s RAs Right ascension (J2000) 34 A1 --- DE- Declination sign (J2000) 35- 36 I2 deg DEd Declination (J2000) 38- 39 I2 arcmin DEm Declination (J2000) 41- 42 I2 arcsec DEs Declination (J2000) 44- 51 F8.2 mas/yr pmRA ?=- Proper motion along RA 52- 59 F8.2 mas/yr pmDE ?=- Proper motion along DE 60- 61 I2 --- r_pm ?=- Proper motion reference, in refs.dat file 63- 70 A8 --- SpType MK spectral type 71 A1 --- n_SpType [a] Photometrically estimated SpType (1) 73- 74 I2 --- r_SpType ?=- Spectral type reference, in refs.dat file -------------------------------------------------------------------------------- Note (1): 'a' indicates a Spectral type estimated from B-V and V-K colors, either from Guide Star Photometric Catalog (Lasker et al. 1988, Cat. ) or from this work. -------------------------------------------------------------------------------- Byte-by-byte Description of file: refs.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Ref Reference number 4- 22 A19 --- BibCode BibCode 24- 43 A20 --- Aut Author's name 45-122 A78 --- Com Comments -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- FS ?=- UKIRT FS number 5- 21 A17 --- Name Name 23- 28 F6.3 mag Jmag MKO J magnitude 30- 34 F5.3 mag e_Jmag rms uncertainty on Jmag 36 I1 --- o_Jmag Number of nights of Jmag observations 38- 43 F6.3 mag Hmag MKO H magnitude 45- 49 F5.3 mag e_Hmag rms uncertainty on Hmag 51 I1 --- o_Hmag Number of nights of Hmag observations 53- 58 F6.3 mag Kmag MKO K magnitude 60- 64 F5.3 mag e_Kmag rms uncertainty on Kmag 66 I1 --- o_Kmag Number of nights of Kmag observations 68 I1 --- Notes ? Remark about possible uncertainties (1) -------------------------------------------------------------------------------- Note (1): Remark numbered as follows: 1 = JHK may be too bright by <0.02 mag due to non-linearity underestimate. 2 = K may be too bright by <0.02mag due to non-linearity underestimate. 3 = May be variable at J by ~0.1mag over a period of years. 4 = May be variable at JHK by 0.05-0.10mag over a period of months to years. 5 = J may be too bright by <0.02 mag due to non-linearity underestimate. 6 = HK may be too bright by <0.02mag due to non-linearity underestimate. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 14-Aug-2007