I/284 The USNO-B1.0 Catalog (Monet+ 2003) ================================================================================ The USNO-B Catalog Monet D.G., Levine S.E., Casian B., et al. =2003AJ...(in.press)M ================================================================================ ADC_Keywords: Positional data; Proper motions; Surveys; Magnitudes Description: The USNO-B1.0 is a catalog that presents positions, proper motions, magnitudes in various optical passbands, and star/galaxy estimators for 1,045,913,669 objects derived from 3,648,832,040 separate observations. The data were taken from scans of 7,435 Schmidt plates taken from various sky surveys during the last 50 years. The catalog is expected to be complete down to V=21; the estimated accuracies are 0.2arcsec for the positions at J2000, 0.3mag in up to 5 colors, and 85% accuracy for distinguishing stars from non-stellar objects. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file out.sam 230 214 Sample of data (around 0+0) -------------------------------------------------------------------------------- See also: http://www.nofs.navy.mil/data/fchpix/ : USNO Flagstaff Station Integrated Image and Catalogue Archive Service I/252 : The USNO-A2.0 Catalogue (Monet+ 1998) I/259 : The Tycho-2 Catalogue (Hog+ 2000) Byte-by-byte Description of file: out.sam -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- USNO-B1.0 Designation of the object (1) 14- 25 A12 --- Tycho-2 Designation in the Tycho-2 Catalog 27- 36 F10.6 deg RAdeg Right Ascension at Eq=J2000, Ep=J2000 (2) 37- 46 F10.6 deg DEdeg Declination at Eq=J2000, Ep=J2000 (2) 48- 50 I3 mas e_RAdeg Mean error on RAdeg*cos(DEdeg) at Epoch 52- 54 I3 mas e_DEdeg Mean error on DEdeg at Epoch 56- 61 F6.1 yr Epoch Mean epoch of observation (2) 63- 68 I6 mas/yr pmRA Proper motion in RA (relative to YS4.0) 70- 75 I6 mas/yr pmDE Proper motion in RA 77 I1 0.1 muPr Total Proper Motion probability 79- 81 I3 mas/yr e_pmRA Mean error on pmRA 83- 85 I3 mas/yr e_pmDE Mean error on pmDE 87 I1 100mas fit_RA Mean error on RA fit 89 I1 100mas fit_DE Mean error on DE fit 91 I1 --- Ndet [2,5] Number of detections 93- 95 A3 --- Flags [MsY.] Flags on object (3) 98-102 F5.2 mag B1mag ? First blue magnitude 104 I1 --- B1C ? source of photometric calibration (4) 106 I1 --- B1S ? Survey number (see "Surveys" section below) 107 A1 --- --- [-] 108-110 I3 --- B1f ? Field number in survey 112-113 I2 --- B1s/g ? Star-galaxy separation (6) 115-118 I4 mas B1xi ? Residual in X direction (5) 119-122 I4 mas B1eta ? Residual in Y direction (5) 125-129 F5.2 mag R1mag ? First red magnitude 131 I1 --- R1C ? source of photometric calibration (4) 133 I1 --- R1S ? Survey number (see "Surveys" section below) 134 A1 --- --- [-] 135-137 I3 --- R1f ? Field number in survey 139-140 I2 --- R1s/g ? Star-galaxy separation (6) 142-145 I4 mas R1xi ? Residual in X direction (5) 146-149 I4 mas R1eta ? Residual in Y direction (5) 152-156 F5.2 mag B2mag ? Second blue magnitude 158 I1 --- B2C ? source of photometric calibration (4) 160 I1 --- B2S ? Survey number (see "Surveys" section below) 161 A1 --- --- [-] 162-164 I3 --- B2f ? Field number in survey 166-167 I2 --- B2s/g ? Star-galaxy separation (6) 169-172 I4 mas B2xi ? Residual in X direction (5) 173-176 I4 mas B2eta ? Residual in Y direction (5) 179-183 F5.2 mag R2mag ? Second red magnitude 185 I1 --- R2C ? source of photometric calibration (4) 187 I1 --- R2S ? Survey number (see "Surveys" section below) 188 A1 --- --- [-] 189-191 I3 --- R2f ? Field number in survey 193-194 I2 --- R2s/g ? Star-galaxy separation (6) 196-199 I4 mas R2xi ? Residual in X direction (5) 200-203 I4 mas R2eta ? Residual in Y direction (5) 206-210 F5.2 mag Imag ? Infrared (N) magnitude 212 I1 --- IC ? source of photometric calibration (4) 214 I1 --- IS ? Survey number (see "Surveys" section below) 215 A1 --- --- [-] 216-218 I3 --- If ? Field number in survey 220-221 I2 --- Is/g ? Star-galaxy separation (6) 223-226 I4 mas Ixi ? Residual in X direction (5) 227-230 I4 mas Ieta ? Residual in Y direction (5) -------------------------------------------------------------------------------- Note (1): The USNO-B1.0 is arranged in zones of 0.1deg in Declination, with objects ordered by Right Ascension in each zone. The USNO-B1.0 is made of the zone number (from 0000 in South Pole to 1799 in North Pole), followed by a sequential number. Note (2): The proper motion was applied to compute the RAdeg and DEdeg values. Please note that the large uncertainties in the proper motions mean that the RAdeg and DEdeg are less accurate than the mean errors e_RAdeg and e_DEdeg which apply to the position at the mean Epoch. Note (3): . denotes the absence of any flag M = Existence in a proper motion catalog, s = object on a diffraction spike Y = Correlation with YS4.0 catalog (Monet, in prep.) Note (4): the photometric calibration is represented by a number: 0 = bright photometric standards on the plate 1 = faint photometric standard on the plate 2 = faint photometric standard one plate away (on overlap plate) 3 = faint photometric standard two plate away (on overlap of overlap) etc Note (5): Distance, along the x- and y- direction, of the object position compared to the mean epoch. Note (6): The star/galaxy separation is a measure of the similarity of the point-spread function to a stellar profile: 0 means quite dissimilar -- i.e. a non-stellar object 11 means quite similar -- i.e. a stellar object -------------------------------------------------------------------------------- Surveys used for USNO-B1.0: -------------------------------------------------- # Name Emuls Wavelen. Zones Fld Dates (nm) Obs. -------------------------------------------------- 0 = POSS-I 103a-O 350-500 -30..+90 936 1949-1965 1 = POSS-I 103a-E 620-670 -30..+90 936 1949-1965 2 = POSS-II IIIa-J 385-540 +00..+87 897 1985-2000 3 = POSS-II IIIa-F 610-690 +00..+87 897 1985-1999 4 = SERC-J IIIa-J 385-540 -90..-05 606 1978-1990 5 = ESO-R IIIa-F 630-690 -90..-05 624 1974-1994 6 = AAO-R IIIa-F 590-690 -90..-20 606 1985-1998 7 = POSS-II IV-N 730-900 +05..+87 800 1989-2000 8 = SERC-I IV-N 715-900 -90..+00 892 1978-2002 9 = SERC-I* IV-N 715-900 +05..+20 25 1981-2002 -------------------------------------------------- Acknowledgements: Stephen Levine and Dave Monet, USNO Flagstaff. ================================================================================ (End) Francois Ochsenbein [CDS] 14-Nov-2002