IV. 2MASS Data Processing

4. Point Source Detection and Photometry

b. Profile-Fit Photometry

Table 2: Correction parameters for the flux uncertainty

The tabulated quantities "delta" and "floor" represent the values of and , respectively, as a function of the PSFid as listed in the Point Source Catalog.

Hemis. Date Range J H K_s

North 970521 - 980604
PSFid delta floor 09531 0.0246 0.0202 09661 0.0267 0.0176 09911 0.0267 0.0144 10091 0.0260 0.0155 10311 0.0217 0.0139 10471 0.0188 0.0140 10711 0.0200 0.0127 10911 0.0200 0.0103 11091 0.0139 0.0109 11281 0.0137 0.0121 11491 0.0147 0.0109 11691 0.0138 0.0104 11871 0.0130 0.0101 12091 0.0121 0.0096 12311 0.0113 0.0092 12521 0.0106 0.0088 12711 0.0100 0.0085 12921 0.0094 0.0081 13071 0.0090 0.0079 13301 0.0084 0.0076 13501 0.0080 0.0073 13781 0.0074 0.0069 14031 0.0069 0.0066

PSFid delta floor 09471 0.0309 0.0232 09711 0.0320 0.0198 09891 0.0238 0.0179 10101 0.0225 0.0163 10301 0.0222 0.0148 10481 0.0234 0.0111 10691 0.0167 0.0137 10891 0.0177 0.0136 11101 0.0164 0.0130 11291 0.0153 0.0124 11501 0.0142 0.0119 11701 0.0133 0.0114 11861 0.0126 0.0110 12131 0.0115 0.0104 12291 0.0109 0.0101 12501 0.0102 0.0096 12721 0.0095 0.0092 12881 0.0090 0.0089 13081 0.0085 0.0086 13291 0.0079 0.0083 13511 0.0074 0.0079 13761 0.0069 0.0076 14041 0.0064 0.0072

PSFid delta floor 09261 0.0309 0.0187 09481 0.0248 0.0150 09701 0.0240 0.0147 09901 0.0216 0.0133 10081 0.0205 0.0126 10291 0.0224 0.0115 10501 0.0176 0.0123 10701 0.0155 0.0110 10901 0.0122 0.0104 11111 0.0151 0.0100 11301 0.0142 0.0096 11511 0.0134 0.0091 11711 0.0127 0.0088 11881 0.0121 0.0085 12101 0.0113 0.0081 12301 0.0107 0.0077 12511 0.0102 0.0074 12681 0.0097 0.0072 12891 0.0092 0.0069 13091 0.0087 0.0066 13311 0.0083 0.0064 13491 0.0079 0.0062 13771 0.0074 0.0058 14021 0.0069 0.0056

North 980605 - 980916
PSFid delta floor 09752 0.0330 0.0173 09902 0.0211 0.0180 10092 0.0270 0.0156 10302 0.0225 0.0140 10522 0.0239 0.0121 10692 0.0149 0.0151 10882 0.0167 0.0131 11082 0.0149 0.0126 11292 0.0133 0.0120 11472 0.0121 0.0115 11682 0.0108 0.0110 11882 0.0097 0.0105 12092 0.0087 0.0101 12322 0.0077 0.0096 12492 0.0071 0.0093 12912 0.0058 0.0086 13102 0.0053 0.0083

PSFid delta floor 09762 0.0326 0.0147 09932 0.0311 0.0148 10082 0.0295 0.0161 10312 0.0313 0.0145 10482 0.0295 0.0155 10672 0.0292 0.0115 10902 0.0267 0.0151 11072 0.0277 0.0128 11302 0.0270 0.0124 11482 0.0265 0.0121 11692 0.0260 0.0117 11902 0.0254 0.0113 12112 0.0249 0.0110 12282 0.0245 0.0108 12552 0.0239 0.0104 12782 0.0234 0.0100 13342 0.0223 0.0093

PSFid delta floor 10122 0.0293 0.0063 10272 0.0225 0.0110 10512 0.0269 0.0088 10702 0.0214 0.0087 10892 0.0196 0.0097 11092 0.0152 0.0137 11312 0.0163 0.0103 11502 0.0151 0.0104 11712 0.0139 0.0105 11872 0.0131 0.0106 12122 0.0119 0.0107 12332 0.0110 0.0108 12572 0.0100 0.0109 12832 0.0091 0.0110 13392 0.0075 0.0112

North 980919 - 990723
PSFid delta floor 09423 0.0353 0.0154 09523 0.0382 0.0170 09713 0.0335 0.0167 09903 0.0237 0.0172 10093 0.0241 0.0159 10303 0.0234 0.0146 10483 0.0204 0.0125 10703 0.0225 0.0105 10903 0.0182 0.0117 11103 0.0165 0.0106 11293 0.0196 0.0098 11503 0.0188 0.0095 11703 0.0180 0.0110 11913 0.0164 0.0128 12093 0.0158 0.0126 12323 0.0151 0.0123 12483 0.0147 0.0121 12663 0.0142 0.0120 12873 0.0137 0.0117 13083 0.0132 0.0115 13253 0.0128 0.0114 13493 0.0123 0.0112 13753 0.0117 0.0109 14043 0.0112 0.0107

PSFid delta floor 09383 0.0528 0.0152 09503 0.0371 0.0210 09733 0.0388 0.0187 09873 0.0317 0.0179 10083 0.0293 0.0171 10293 0.0292 0.0150 10463 0.0330 0.0120 10693 0.0296 0.0130 10883 0.0284 0.0119 11063 0.0261 0.0109 11323 0.0256 0.0121 11543 0.0285 0.0125 11713 0.0283 0.0121 11893 0.0282 0.0117 12103 0.0279 0.0112 12303 0.0277 0.0108 12513 0.0275 0.0104 12713 0.0273 0.0101 12883 0.0272 0.0098 13073 0.0270 0.0095 13303 0.0268 0.0091 13503 0.0266 0.0088 13763 0.0264 0.0085 14053 0.0262 0.0081

PSFid delta floor 09223 0.0273 0.0166 09273 0.0268 0.0165 09543 0.0289 0.0150 09683 0.0281 0.0149 09923 0.0252 0.0128 10073 0.0235 0.0101 10313 0.0220 0.0121 10493 0.0199 0.0126 10753 0.0249 0.0100 10923 0.0223 0.0128 11113 0.0201 0.0135 11303 0.0223 0.0093 11493 0.0222 0.0089 11693 0.0221 0.0085 11883 0.0220 0.0082 12113 0.0218 0.0078 12313 0.0217 0.0075 12503 0.0216 0.0072 12703 0.0215 0.0069 12903 0.0214 0.0067 13113 0.0213 0.0064 13313 0.0212 0.0062 13513 0.0211 0.0059 13743 0.0210 0.0057 14063 0.0208 0.0054

North 990913 - end
PSFid delta floor 09334 0.0409 0.0237 09524 0.0392 0.0222 09644 0.0365 0.0203 09874 0.0352 0.0174 10104 0.0307 0.0163 10304 0.0278 0.0157 10504 0.0273 0.0126 10724 0.0241 0.0177 10894 0.0225 0.0113 11104 0.0237 0.0108 11314 0.0219 0.0125 11504 0.0198 0.0089 11714 0.0182 0.0118 11884 0.0172 0.0113 12094 0.0162 0.0108 12304 0.0167 0.0159 12504 0.0143 0.0100 12714 0.0134 0.0096 12874 0.0128 0.0093 13104 0.0120 0.0089 13324 0.0113 0.0085 13504 0.0108 0.0082 13754 0.0101 0.0079 14004 0.0094 0.0075

PSFid delta floor 09154 0.0309 0.0331 09294 0.0333 0.0285 09464 0.0284 0.0279 09654 0.0254 0.0251 09884 0.0299 0.0227 10114 0.0239 0.0216 10314 0.0218 0.0201 10494 0.0221 0.0164 10704 0.0292 0.0149 10914 0.0191 0.0154 11094 0.0203 0.0170 11294 0.0228 0.0148 11494 0.0241 0.0132 11694 0.0179 0.0149 11894 0.0172 0.0143 12104 0.0164 0.0137 12314 0.0158 0.0131 12494 0.0152 0.0126 12724 0.0146 0.0121 12904 0.0141 0.0116 13114 0.0135 0.0112 13304 0.0131 0.0108 13524 0.0126 0.0104 13744 0.0121 0.0099 14054 0.0114 0.0094

PSFid delta floor 09344 0.0298 0.0168 09504 0.0323 0.0153 09704 0.0329 0.0163 09904 0.0275 0.0161 10074 0.0215 0.0137 10284 0.0151 0.0167 10514 0.0144 0.0109 10734 0.0209 0.0114 10924 0.0203 0.0139 11114 0.0205 0.0097 11334 0.0173 0.0130 11484 0.0165 0.0128 11684 0.0155 0.0125 11904 0.0144 0.0122 12114 0.0135 0.0120 12324 0.0127 0.0117 12514 0.0120 0.0115 12704 0.0114 0.0113 12884 0.0108 0.0111 13094 0.0102 0.0109 13264 0.0097 0.0107 13534 0.0090 0.0105 13764 0.0085 0.0103 14034 0.0079 0.0100

South 980318 - end
PSFid delta floor 09155 0.0293 0.0226 09315 0.0316 0.0199 09535 0.0340 0.0179 09695 0.0366 0.0177 09875 0.0328 0.0161 10075 0.0313 0.0167 10285 0.0289 0.0148 10515 0.0262 0.0140 10705 0.0272 0.0142 10885 0.0218 0.0121 11095 0.0182 0.0105 11355 0.0201 0.0161 11495 0.0233 0.0125 11695 0.0192 0.0143 11905 0.0245 0.0121 12085 0.0247 0.0121 12325 0.0184 0.0097 12505 0.0177 0.0094 12715 0.0169 0.0090 12905 0.0163 0.0087 13095 0.0157 0.0083 13275 0.0152 0.0081 13525 0.0144 0.0077 13755 0.0138 0.0074 14045 0.0131 0.0070

PSFid delta floor 09115 0.0344 0.0212 09325 0.0462 0.0197 09505 0.0469 0.0196 09715 0.0283 0.0201 09895 0.0264 0.0192 10085 0.0289 0.0174 10305 0.0293 0.0151 10495 0.0241 0.0139 10675 0.0273 0.0141 10905 0.0242 0.0148 11085 0.0248 0.0137 11285 0.0289 0.0162 11475 0.0252 0.0149 11705 0.0278 0.0184 11915 0.0243 0.0141 12105 0.0266 0.0154 12345 0.0235 0.0134 12615 0.0230 0.0130 13025 0.0238 0.0151 13415 0.0216 0.0119 13735 0.0212 0.0115 14075 0.0207 0.0111

PSFid delta floor 09355 0.0308 0.0189 09545 0.0304 0.0171 09705 0.0293 0.0170 09905 0.0291 0.0180 10095 0.0276 0.0170 10315 0.0302 0.0159 10505 0.0282 0.0143 10715 0.0261 0.0136 10915 0.0298 0.0142 11105 0.0220 0.0142 11315 0.0248 0.0109 11485 0.0283 0.0112 11725 0.0280 0.0145 11885 0.0280 0.0143 12125 0.0279 0.0141 12305 0.0279 0.0139 12515 0.0279 0.0136 12665 0.0278 0.0135 12865 0.0278 0.0133 13055 0.0278 0.0131 13295 0.0277 0.0129 13555 0.0277 0.0127 13705 0.0277 0.0125 14055 0.0276 0.0122

Return to Section IV.4b.

Hemis.	Date Range	J	H	K_s
North	970521 - 980604	PSFid delta floor 09531 0.0246 0.0202 09661 0.0267 0.0176 09911 0.0267 0.0144 10091 0.0260 0.0155 10311 0.0217 0.0139 10471 0.0188 0.0140 10711 0.0200 0.0127 10911 0.0200 0.0103 11091 0.0139 0.0109 11281 0.0137 0.0121 11491 0.0147 0.0109 11691 0.0138 0.0104 11871 0.0130 0.0101 12091 0.0121 0.0096 12311 0.0113 0.0092 12521 0.0106 0.0088 12711 0.0100 0.0085 12921 0.0094 0.0081 13071 0.0090 0.0079 13301 0.0084 0.0076 13501 0.0080 0.0073 13781 0.0074 0.0069 14031 0.0069 0.0066	PSFid delta floor 09471 0.0309 0.0232 09711 0.0320 0.0198 09891 0.0238 0.0179 10101 0.0225 0.0163 10301 0.0222 0.0148 10481 0.0234 0.0111 10691 0.0167 0.0137 10891 0.0177 0.0136 11101 0.0164 0.0130 11291 0.0153 0.0124 11501 0.0142 0.0119 11701 0.0133 0.0114 11861 0.0126 0.0110 12131 0.0115 0.0104 12291 0.0109 0.0101 12501 0.0102 0.0096 12721 0.0095 0.0092 12881 0.0090 0.0089 13081 0.0085 0.0086 13291 0.0079 0.0083 13511 0.0074 0.0079 13761 0.0069 0.0076 14041 0.0064 0.0072	PSFid delta floor 09261 0.0309 0.0187 09481 0.0248 0.0150 09701 0.0240 0.0147 09901 0.0216 0.0133 10081 0.0205 0.0126 10291 0.0224 0.0115 10501 0.0176 0.0123 10701 0.0155 0.0110 10901 0.0122 0.0104 11111 0.0151 0.0100 11301 0.0142 0.0096 11511 0.0134 0.0091 11711 0.0127 0.0088 11881 0.0121 0.0085 12101 0.0113 0.0081 12301 0.0107 0.0077 12511 0.0102 0.0074 12681 0.0097 0.0072 12891 0.0092 0.0069 13091 0.0087 0.0066 13311 0.0083 0.0064 13491 0.0079 0.0062 13771 0.0074 0.0058 14021 0.0069 0.0056
North	980605 - 980916	PSFid delta floor 09752 0.0330 0.0173 09902 0.0211 0.0180 10092 0.0270 0.0156 10302 0.0225 0.0140 10522 0.0239 0.0121 10692 0.0149 0.0151 10882 0.0167 0.0131 11082 0.0149 0.0126 11292 0.0133 0.0120 11472 0.0121 0.0115 11682 0.0108 0.0110 11882 0.0097 0.0105 12092 0.0087 0.0101 12322 0.0077 0.0096 12492 0.0071 0.0093 12912 0.0058 0.0086 13102 0.0053 0.0083	PSFid delta floor 09762 0.0326 0.0147 09932 0.0311 0.0148 10082 0.0295 0.0161 10312 0.0313 0.0145 10482 0.0295 0.0155 10672 0.0292 0.0115 10902 0.0267 0.0151 11072 0.0277 0.0128 11302 0.0270 0.0124 11482 0.0265 0.0121 11692 0.0260 0.0117 11902 0.0254 0.0113 12112 0.0249 0.0110 12282 0.0245 0.0108 12552 0.0239 0.0104 12782 0.0234 0.0100 13342 0.0223 0.0093	PSFid delta floor 10122 0.0293 0.0063 10272 0.0225 0.0110 10512 0.0269 0.0088 10702 0.0214 0.0087 10892 0.0196 0.0097 11092 0.0152 0.0137 11312 0.0163 0.0103 11502 0.0151 0.0104 11712 0.0139 0.0105 11872 0.0131 0.0106 12122 0.0119 0.0107 12332 0.0110 0.0108 12572 0.0100 0.0109 12832 0.0091 0.0110 13392 0.0075 0.0112
North	980919 - 990723	PSFid delta floor 09423 0.0353 0.0154 09523 0.0382 0.0170 09713 0.0335 0.0167 09903 0.0237 0.0172 10093 0.0241 0.0159 10303 0.0234 0.0146 10483 0.0204 0.0125 10703 0.0225 0.0105 10903 0.0182 0.0117 11103 0.0165 0.0106 11293 0.0196 0.0098 11503 0.0188 0.0095 11703 0.0180 0.0110 11913 0.0164 0.0128 12093 0.0158 0.0126 12323 0.0151 0.0123 12483 0.0147 0.0121 12663 0.0142 0.0120 12873 0.0137 0.0117 13083 0.0132 0.0115 13253 0.0128 0.0114 13493 0.0123 0.0112 13753 0.0117 0.0109 14043 0.0112 0.0107	PSFid delta floor 09383 0.0528 0.0152 09503 0.0371 0.0210 09733 0.0388 0.0187 09873 0.0317 0.0179 10083 0.0293 0.0171 10293 0.0292 0.0150 10463 0.0330 0.0120 10693 0.0296 0.0130 10883 0.0284 0.0119 11063 0.0261 0.0109 11323 0.0256 0.0121 11543 0.0285 0.0125 11713 0.0283 0.0121 11893 0.0282 0.0117 12103 0.0279 0.0112 12303 0.0277 0.0108 12513 0.0275 0.0104 12713 0.0273 0.0101 12883 0.0272 0.0098 13073 0.0270 0.0095 13303 0.0268 0.0091 13503 0.0266 0.0088 13763 0.0264 0.0085 14053 0.0262 0.0081	PSFid delta floor 09223 0.0273 0.0166 09273 0.0268 0.0165 09543 0.0289 0.0150 09683 0.0281 0.0149 09923 0.0252 0.0128 10073 0.0235 0.0101 10313 0.0220 0.0121 10493 0.0199 0.0126 10753 0.0249 0.0100 10923 0.0223 0.0128 11113 0.0201 0.0135 11303 0.0223 0.0093 11493 0.0222 0.0089 11693 0.0221 0.0085 11883 0.0220 0.0082 12113 0.0218 0.0078 12313 0.0217 0.0075 12503 0.0216 0.0072 12703 0.0215 0.0069 12903 0.0214 0.0067 13113 0.0213 0.0064 13313 0.0212 0.0062 13513 0.0211 0.0059 13743 0.0210 0.0057 14063 0.0208 0.0054
North	990913 - end	PSFid delta floor 09334 0.0409 0.0237 09524 0.0392 0.0222 09644 0.0365 0.0203 09874 0.0352 0.0174 10104 0.0307 0.0163 10304 0.0278 0.0157 10504 0.0273 0.0126 10724 0.0241 0.0177 10894 0.0225 0.0113 11104 0.0237 0.0108 11314 0.0219 0.0125 11504 0.0198 0.0089 11714 0.0182 0.0118 11884 0.0172 0.0113 12094 0.0162 0.0108 12304 0.0167 0.0159 12504 0.0143 0.0100 12714 0.0134 0.0096 12874 0.0128 0.0093 13104 0.0120 0.0089 13324 0.0113 0.0085 13504 0.0108 0.0082 13754 0.0101 0.0079 14004 0.0094 0.0075	PSFid delta floor 09154 0.0309 0.0331 09294 0.0333 0.0285 09464 0.0284 0.0279 09654 0.0254 0.0251 09884 0.0299 0.0227 10114 0.0239 0.0216 10314 0.0218 0.0201 10494 0.0221 0.0164 10704 0.0292 0.0149 10914 0.0191 0.0154 11094 0.0203 0.0170 11294 0.0228 0.0148 11494 0.0241 0.0132 11694 0.0179 0.0149 11894 0.0172 0.0143 12104 0.0164 0.0137 12314 0.0158 0.0131 12494 0.0152 0.0126 12724 0.0146 0.0121 12904 0.0141 0.0116 13114 0.0135 0.0112 13304 0.0131 0.0108 13524 0.0126 0.0104 13744 0.0121 0.0099 14054 0.0114 0.0094	PSFid delta floor 09344 0.0298 0.0168 09504 0.0323 0.0153 09704 0.0329 0.0163 09904 0.0275 0.0161 10074 0.0215 0.0137 10284 0.0151 0.0167 10514 0.0144 0.0109 10734 0.0209 0.0114 10924 0.0203 0.0139 11114 0.0205 0.0097 11334 0.0173 0.0130 11484 0.0165 0.0128 11684 0.0155 0.0125 11904 0.0144 0.0122 12114 0.0135 0.0120 12324 0.0127 0.0117 12514 0.0120 0.0115 12704 0.0114 0.0113 12884 0.0108 0.0111 13094 0.0102 0.0109 13264 0.0097 0.0107 13534 0.0090 0.0105 13764 0.0085 0.0103 14034 0.0079 0.0100
South	980318 - end	PSFid delta floor 09155 0.0293 0.0226 09315 0.0316 0.0199 09535 0.0340 0.0179 09695 0.0366 0.0177 09875 0.0328 0.0161 10075 0.0313 0.0167 10285 0.0289 0.0148 10515 0.0262 0.0140 10705 0.0272 0.0142 10885 0.0218 0.0121 11095 0.0182 0.0105 11355 0.0201 0.0161 11495 0.0233 0.0125 11695 0.0192 0.0143 11905 0.0245 0.0121 12085 0.0247 0.0121 12325 0.0184 0.0097 12505 0.0177 0.0094 12715 0.0169 0.0090 12905 0.0163 0.0087 13095 0.0157 0.0083 13275 0.0152 0.0081 13525 0.0144 0.0077 13755 0.0138 0.0074 14045 0.0131 0.0070	PSFid delta floor 09115 0.0344 0.0212 09325 0.0462 0.0197 09505 0.0469 0.0196 09715 0.0283 0.0201 09895 0.0264 0.0192 10085 0.0289 0.0174 10305 0.0293 0.0151 10495 0.0241 0.0139 10675 0.0273 0.0141 10905 0.0242 0.0148 11085 0.0248 0.0137 11285 0.0289 0.0162 11475 0.0252 0.0149 11705 0.0278 0.0184 11915 0.0243 0.0141 12105 0.0266 0.0154 12345 0.0235 0.0134 12615 0.0230 0.0130 13025 0.0238 0.0151 13415 0.0216 0.0119 13735 0.0212 0.0115 14075 0.0207 0.0111	PSFid delta floor 09355 0.0308 0.0189 09545 0.0304 0.0171 09705 0.0293 0.0170 09905 0.0291 0.0180 10095 0.0276 0.0170 10315 0.0302 0.0159 10505 0.0282 0.0143 10715 0.0261 0.0136 10915 0.0298 0.0142 11105 0.0220 0.0142 11315 0.0248 0.0109 11485 0.0283 0.0112 11725 0.0280 0.0145 11885 0.0280 0.0143 12125 0.0279 0.0141 12305 0.0279 0.0139 12515 0.0279 0.0136 12665 0.0278 0.0135 12865 0.0278 0.0133 13055 0.0278 0.0131 13295 0.0277 0.0129 13555 0.0277 0.0127 13705 0.0277 0.0125 14055 0.0276 0.0122