Title: The Chandra Deep Field North Survey. XIII. 2 Ms Point-Source Catalogs Authors: Alexander D.M., Bauer F.E., Brandt W.N., Schneider D.P., Hornschemeier A.E., Vignali C., Barger A.J., Broos P.S., Cowie L.L., Garmire G.P., Townsley L.K., Bautz M.W., Chartas G., Sargent W.L.W. Table: CDF-N Main Chandra Catalog: Basic Source Properties ================================================================================ Byte-by-byte Description of file: datafile3A.txt -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- Num Source number (1) 5- 6 I2 h RAh X-ray hour of right ascension (J2000) 8- 9 I2 min RAm X-ray minute of right ascension (J2000) 11- 15 F5.2 s RAs X-ray second of right ascension (J2000) 17 A1 --- DE- Sign of the X-ray declination (J2000) 18- 19 I2 deg DEd X-ray degree of declination (J2000) 21- 22 I2 arcmin DEm X-ray arcminute of declination (J2000) 24- 27 F4.1 arcsec DEs X-ray arcsecond of declination (J2000) 29- 31 F3.1 arcsec PosErr Position error (80%-90% confidence level) 33- 37 F5.2 arcmin OAngle Off-axis angle 39 A1 --- l_FB Limit flag on FB 40- 46 F7.1 ct FB The 0.5-8.0 keV band counts 48- 52 F5.1 ct E_FB ? The upper 1 {sigma} error in FB 54- 58 F5.1 ct e_FB ? The lower 1 {sigma} error in FB 60- 61 A2 --- f_FB Flag on FB (2) 63 A1 --- l_SB Limit flag on SB 64- 70 F7.1 ct SB The 0.5-2 keV band counts 72- 76 F5.1 ct E_SB ? The upper 1 {sigma} error in SB 78- 82 F5.1 ct e_SB ? The lower 1 {sigma} error in SB 84- 85 A2 --- f_SB Flag on SB (2) 87 A1 --- l_HB Limit flag on HB 88- 93 F6.1 ct HB The 2-8 keV band counts 95- 98 F4.1 ct E_HB ? The upper 1 {sigma} error in HB 100-103 F4.1 ct e_HB ? The lower 1 {sigma} error in HB 105-106 A2 --- f_HB ? Flag on HB (2) 108 A1 --- l_SB1 Limit flag on SB1 109-114 F6.1 ct SB1 The 0.5-1 keV band counts 116-119 F4.1 ct E_SB1 ? The upper 1 {sigma} error in SB1 121-124 F4.1 ct e_SB1 ? The lower 1 {sigma} error in SB1 126 A1 --- f_SB1 Flag on SB1 (2) 128 A1 --- l_SB2 Limit flag on SB2 129-135 F7.1 ct SB2 The 1-2 keV band counts 137-141 F5.1 ct E_SB2 ? The upper 1 {sigma} error in SB2 143-147 F5.1 ct e_SB2 ? The lower 1 {sigma} error in SB2 149 A1 --- f_SB2 Flag on SB2 (2) 151 A1 --- l_HB1 Limit flag on HB1 152-157 F6.1 ct HB1 The 2-4 keV band counts 159-162 F4.1 ct E_HB1 ? The upper 1 {sigma} error in HB1 164-167 F4.1 ct e_HB1 ? The lower 1 {sigma} error in HB1 169 A1 --- f_HB1 Flag on HB1 (2) 171 A1 --- l_HB2 Limit flag on HB2 172-177 F6.1 ct HB2 The 4-8 keV band counts 179-182 F4.1 ct E_HB2 ? The upper 1 {sigma} error in HB2 184-187 F4.1 ct e_HB2 ? The lower 1 {sigma} error in HB2 189 A1 --- f_HB2 Flag on HB2 (2) 191-197 A7 --- n_Num Notes on the source Num (3) -------------------------------------------------------------------------------- Note (1): Sources are listed in order of increasing right ascension. Note (2): a = Source was detected with the restricted ACIS grade set with a probability threshold of 10^-7^; b = Source was detected with the standard ASCA grade set with a probability threshold of 10^-5^; c = Source positional offset >2.5'' from the primary source position. Note (3): H = Denotes objects lying in the HDF-N (see Fig. 2); O = Refers to objects that have large cross-band positional offsets (>2.5'')--all but one of these sources lie at off-axis angles of >6', and the flagged counterpart may not be associated with the main counterpart in some cases; M = Refers to sources where the photometry was performed manually; S = Refers to close double sources where manual separation was required; R = Refers to radio-detected sources that were used in determining the astrometric accuracy (see section 3.3); HB3 = Refers to a detection in the 6-8 keV band. --------------------------------------------------------------------------------