1: TRANSIENT SOURCE (COOKE ET AL, NATURE, V261, 564, 1976.) 2: OPTICAL CENTER OF M31. EXTENDED 2.7 DEG IN RA BY 0.7 DEG 2 IN DEC (OPTICAL IMAGE). CF. BOWYER ET AL, AP. J., V190, 2 285, 1974. 3: CENTER OF OPTICAL IMAGE OF SNR. CIRCULAR SHELL OPTICALLY 3 0.08 DEG IN DIAMETER. 4: CARPENTER ET AL, M.N.R.A.S., V179, 27P, 1977. HDE 245770, 4 CONFIRMED OPTICAL COUNTERPART OF A0535+26 (CF. MARGON ET AL, 4 AP. J., V216, 811, 1977), IS AT POSITION LISTED. 5: DOWER ET AL, IAU CIRC 3045 (MAR. 4, 1977). MAY BE STAR 5 AT 00:42:07.0, +32:44:09 (IAU CIRC 3096, AUG. 18, 1977) 6: 2A POSITION. POSSIBLY CLUSTER CENTERED AT 13:29.4, -31:26. 7: JERNIGAN ET AL, IAU CIRC 2900 (JAN. 13, 1976) 8: OPTICAL POSITION OF SANDULEAK 160 (CF. CLARK ET AL., 8 AP. J. (LETT.), V221, L37, 1978). 9: OPTICAL POSITION OF QSO. TENTATIVE IDENTIFICATION, 9 (SCHREIER ET AL, AP. J. (LETT.), V201, L37, 1975; MARGON 9 ET AL, AP. J. (LETT.), V211, L5, 1975. BUT CF. MARKERT 9 ET AL, AP. J., V206, 265, 1976) 10: DOXSEY ET AL., NATURE, V269, 112, 1977. 11: OPTICAL POSITION OF CD GALAXY IN CLUSTER AWM7 (SCHWARTZ ET AL. 11 AP.J.(LETT.), V238, L53, 1980). X-RAY SOURCE EXTENDED 9 MIN. 12: RADIO POSITION. SLIGO, M.N.R.A.S., V168, 307, 1974. 13: EPSTEIN, IAU CIRC 2859, (NOV. 6, 1975) 14: OPTICAL POSITION OF NGC 1275; AT CENTER OF PERSEUS CLUSTER. 15: 2A POSITION. PYE & COOKE (M.N.R.A.S., V177, 21P, 1976) ID 15 THE SOURCE AS CLUSTER CA0340-538 AT 03:41.4, -53:47 16: OPTICAL POSITION OF X PERSEI. 17: SCHNOPPER ET AL, AP. J. (LETT.), V217, L15, 1977. 18: POSITION OF MM RADIO SOURCE IN NUCLEUS OF SEYFERT GALAXY, 18 ALTHOUGH OUTSIDE OF 4U ERROR BOX (WILLS ET AL, AP. J. 18 (LETT.), V202, L59, 1975). INSIDE H0415+38 ERROR BOX (MARSHALL 18 ET AL., NATURE, V275, 625, 1978). 19: POSITION OF RADIO SOURCE AT CENTER OF SEYFERT GALAXY 19 3C120. BEST X-RAY POSITION 04:30:32.7, +05:14:06. 19 (SCHNOPPER ET AL, AP. J. (LETT.), V215, L7, 1977.) 20: OPTICAL CENTER OF GLOBULAR CLUSTER NGC 1851, DIAMETER 20 9 MIN. BEST X-RAY POSITION 05:12:28.7, -40:05:53 (JERNIGAN 20 & CLARK, AP.J.(LETT.), V231, L125,1979). 21: SOFT X-RAY SOURCE (MEWE ET AL, NATURE, V256, 711, 1975). 22: OPTICAL POSITION OF "STAR 22" OF PAKULL AND SWINGS (REF, NOTE 22 132). BEST X-RAY POSITION 05:21:16.5, -72:00:19. 23: SANDULEAK AND PHILIP'S BINARY STAR (IAU CIRC 3023, 3039, 23 3073 & 3095). 24: MARKERT & CLARK, AP. J. (LETT.), V196, L55, 1975. 25: WHITE & RICKETTS, AP. LETT. V18, 79, 1977. 26: RADIO POSITION OF CRAB NEBULA PULSAR (TAYLOR & MANCHESTER, 26 A.J., V80, 794, 1975). NEBULA EXTENDED (0.03 X 0.02) DEG. 27: DULDIG ET AL, M.N.R.A.S., V187, 567, 1979. POSITION LISTED 27 IS THAT OF STELLAR COUNTERPART. (DAVIDSEN ET AL, AP. J. 27 (LETT.), V193, L25, 1974) 28: OPTICAL CENTER OF SNR IC443. SHELL 0.8 DEG IN DIAMETER 28 (WINKLER AND CLARK, AP. J. (LETT.), V191, L67, 1974). 29: POSITION OF OPTICAL NOVA (V616 MONOCEROTIS) CONCURRENT 29 WITH TRANSIENT SOURCE (BOLEY & WOLFSON, IAU CIRC 2819, AUG. 29 19, 1975). 30: OPTICAL CENTER OF LOOP. SOFT X-RAY SOURCE. (GEBEL & 30 SHORE, AP. J. (LETT.), V179, L2, 1972). 31: CARPENTER ET AL, IAU CIRC 2852 (OCT. 21, 1975). 32: BAHCALL ET AL, M.N.R.A.S., V171, 41P, 1975. 33: SEWARD ET AL, M.N.R.A.S., V177, 13P, 1976. 34: POSITION OF PULSAR PSR 0833-45. (TAYLOR & MANCHESTER, 34 OP. CIT., REFERENCE IN NOTE 26). 35: OPTICAL POSITION OF HD 77581 (CF. HILTNER, IAU CIRC 2502, 35 MAR. 2, 1973). 36: QUASAR. OPTICAL POSITION GIVEN. (TANANBAUM ET AL., AP.J. 36 (LETT.), V234, L9, 1979). CF. ALSO REF., NOTE 256, FOR 1E 36 SOURCES. 37: BEST X-RAY POSITION 10:36, -27:30 (IVES & SANFORD, M.N.R.A.S., 37 V176, 13P, 1976). POSITION GIVEN THAT OF CLUSTER A1060. 38: X-RAY POSITION. CF. NOTE 33. RADIO SNR G287.8-0.5 PROBABLE 38 IDENTIFICATION (BECKER ET AL, AP. J. (LETT.), V209, L65, 38 1976). 39: TRANSIENT SOURCE (RICKETTS ET AL, NATURE, V259, 546, 1976). 40: TRANSIENT SOURCE (EYLES ET AL, NATURE, V254, 577, 1975). 41: OPTICAL POSITION OF KRZEMINSKI'S STAR (AP. J. (LETT.), 41 V192, L135, 1974). 42: DOWER ET AL, AP.J., V235, 355, 1980. GALAXY NGC 3783 42 SUGGESTED AS IDENTIFICATION. 43: OPTICAL POSITION OF HD 102567 (BRADT ET AL, IAU CIRC 2957, 43 JUNE 1, 1976). 44: OPTICAL POSITION OF SEYFERT GALAXY NGC 4151 (REF. IN NOTE 166) 45: OPTICAL POSITION (WACKERLING, MEM.R.A.S., V73, 153, 1970) 45 OF VARIABLE STAR WRAY 977=HENIZE 788. (CF. MAUDER, IAU CIRC 45 2946, APR. 30, 1976; BRADT ET AL, NATURE, V269, 21, 1977). 46: OPTICAL POSITION OF QSO 3C273. 47: OPTICAL POSITION OF ELLIPTICAL GALAXY M87. X-RAY POINT 47 SOURCE PLUS EXTENDED SOURCE, 0.8 DEG IN DIAMETER, CENTERED 47 ON M87. (CF. CATURA ET AL, AP. J., V190, 521, 1974.) 48: OPTICAL POSITION OF GALAXY IC3576 (MARGON ET AL, AP. J. 48 (LETT.), V178, L77, 1972). 49: OPTICAL POSITION OF GALAXY NGC 4696 (MITCHELL ET AL, AP. J. 49 (LETT.), V200, L5, 1975). IN CENTAURUS CLUSTER. 50: THIS IS THE 2A X-RAY POSITION. THE CLUSTER EXTENDS 50 OPTICALLY FROM 12:47 TO 13:06 IN RA AND FROM +26:43 50 TO +29:21 IN DEC. NGC 4793, THE BRIGHTEST MEMBER 50 OF THE CLUSTER, IS AT 12:52, +29:12. X-RAY SOURCE 50 EXTENDED; 0.5 DEG IN DIAMETER. (FORMAN ET AL, 50 AP. J., V178, 281, 1972.) 51: OPTICAL POSITION OF WHITE DWARF HZ43. (HEARN ET AL, AP. J. 51 (LETT.), V203, L21, 1976). 52: OPTICAL POSITION OF THE NUCLEUS OF CEN A=NGC 5128 (GRINDLAY 52 ET AL, AP. J. (LETT.), V201, L133, 1975). 53: SOFT X-RAY SOURCE (HEARN, IAU CIRC 2808, JULY 29, 1975). 54: CLAIMED IN REFERENCE IN NOTE 6; NOT SEEN IN REFERENCE IN 54 NOTE 33 AT <20% THE REPORTED INTENSITY. MAY BE A TRANSIENT. 55: OPTICAL POSITION OF SEYFERT GALAXY NGC 5506 (GRIFFITHS ET AL., 55 AP.J.(LETT.), V230, L21, 1979). 56: REPORTED IN REFERENCE IN NOTE 33. MAY BE SNR MSH 14-63 56 AT 14:39.5, -62:15 (NARANAN ET AL, AP. J. (LETT.), V213, 56 L53, 1977). 57: RADIO POSITION OF NOVA-LIKE OBJECT IDENTIFIED WITH CEN XR-4 57 (HJELLMING, IAU CIRC 3369, JUNE 8, 1979).OPTICAL POSITION 57 R.A. = 14:55:19.63, DEC. = -31:28:09.0 (CANIZARES ET AL., 57 AP.J.(LETT.), V236, L55, 1980). 58: CENTER OF OPTICAL SN REMNANT; (VAN DEN BERGH, IAU CIRC 2952, 58 MAY 18, 1976); RADIO SOURCE MSH 14-415. 59: SOFT X-RAY SOURCE (PALMIERI ET AL, V177, 387, 1972). LOOP 59 IS 4.5 DEG IN DIAMETER. 60: CRUDDACE ET AL, AP. J., V174, 529, 1972. TRANSIENT SOURCE? 61: X-RAY POSITION GIVEN (REF., NOTE 264). 62: POSITION GIVEN THAT OF STELLAR OPTICAL COUNTERPART. 62 (MAYO ET AL, IAU CIRC 2957, JUNE 1, 1976.) 63: TRANSIENT SOURCE (WATSON, IAU CIRC 2808, JULY 29, 1975). 63 OPTICAL COUNTERPART IS NOVA. (MURDIN ET AL, M.N.R.A.S., 63 V178, 27P, 1977). 64: OPTICAL POSITION OF STELLAR COUNTERPART (PARKES ET AL., 64 M.N.R.A.S., V184, 73P, 1978). 65: APPARAO ET AL, NATURE, V271, 225, 1978. 67: COOKE & MACCAGNI, M.N.R.A.S., V175, 65P, 1976. ABELL CLUSTER 67 POSITIONS GIVEN THOSE OF OPTICAL CENTER. CF. ALSO REF. 67 IN NOTE 184. 68: POSITION GIVEN THAT OF STELLAR OPTICAL COUNTERPART. 68 (GRINDLAY ET AL, IAU CIRC 3101, SEPT. 2, 1977.) 69: OPTICAL POSITION OF STAR (SANDAGE ET AL, AP. J., V146, 69 316, 1966; STEPHENSON & JOHNSON, AP. J., V146, 602, 1966). 70: POSITION LISTED IS THAT OF STELLAR OPTICAL COUNTERPART. 70 (MCCLINTOCK, IAU CIRC 3088, JULY 11, 1977) 71: OPTICAL POSITION OF SEYFERT GALAXY ESO 141-G55 (GRIFFITHS 71 ET AL., M.N.R.A.S., V188, 813,1979). 72: RADIO POSITION OF G339.6-0.1 (SANDULEAK AND DOLAN, AP. J. 72 (LETT.), 187, L73, 1974). CF. ALSO NOTE 65. 73: OPTICAL POSITION OF HZ HER. 74: OPTICAL POSITION OF STELLAR COUNTERPART (DOXSEY ET AL., 74 AP. J. (LETT.), V228, L67, 1979). 75: OPTICAL POSITION OF HD 153919. 76: PYE ET AL, IAU CIRC 2985 (SEPT. 9, 1976). 77: CARPENTER ET AL, NATURE, V262, 473, 1976. 78: DOXSEY ET AL, NATURE, V270, 586, 1977. POSITION GIVEN 78 THAT OF STELLAR OPTICAL COUNTERPART. 79: WILLMORE ET AL, M.N.R.A.S., V169, 7, 1974. 80: OPTICAL CENTER OF IR VISIBLE CLUSTER (LILLER, IAU CIRC 80 2929, MAR. 19, 1976). CF. BEST X-RAY POSITION 17:30:08, 80 -33:21:25 (HEISE ET AL, NATURE, V261, 562, 1976). 81: LUNAR OCCULTATION POSITION (JANES ET AL, NATURE, V244, 349, 81 1973). 82: ANONYMOUS, IAU CIRC 2934 (MAR. 29, 1976). 83: GLOBULAR CLUSTER. BEST X-RAY POSITION 17:46:48.7, -37:02:17 83 (REF. GIVEN IN NOTE 20). 84: BEST OPTICAL POSITION (SHAWL AND WHITE, AP. J.(LETT.), V239, 84 L61, 1980). 85: COMBINED X-RAY, LUNAR OCCULTATION AND RADIO POSITION 85 (DAVISON, NATURE (PHYS. SCI.), V246, 90, 1973). 86: DAVISON & MORRISON, M.N.R.A.S., V178, 53P, 1977. 87: TRANSIENT SOURCE (JERNIGAN, IAU CIRC 2957, JUNE 1, 1976). 88: COE ET AL, IAU CIRC 3054 (MAR. 30, 1977). 89: WATSON, IAU CIRC 3013 (DEC. 1, 1976). 90: OPTICAL POSITION OF BINARY SYSTEM WITH MAGNETIC WHITE 90 DWARF, AM HER (HEARN & RICHARDSON, AP. J. (LETT.), V213, 90 L115, 1977). 91: POSITION OF STAR IN SAS-3 ERROR BOX (MARGON ET AL., AP. J., 91 V221, 907, 1978). 92: OPTICAL POSITION OF THE CENTER OF GLOBULAR CLUSTER NGC 92 6624 (REF. GIVEN IN NOTE 84). 93: SEWARD ET AL, M.N.R.A.S., V175, 39P, 1976. 94: CHARLES ET AL, M.N.R.A.S., V170, 17P, 1975. 95: CHARLES ET AL, AP. LETT., V16, 145, 1975. A 1835-08 MAY BE 95 SAME SOURCE. 96: OPTICAL CENTER OF GLOBULAR CLUSTER NGC 6712. BEST X-RAY 96 POSITION 18:50:21.9, -08:45:54 (REF. GIVEN IN NOTE 84). 97: LEWIN ET AL, M.N.R.A.S., V177, 93P, 1977. 98: OPTICAL POSITION OF FLARE STAR (THORSTENSEN ET AL, IAU 98 CIRC 3088, JULY 11, 1977). CF. ALSO REFERENCE IN NOTE 91. 99: OPTICAL POSITION OF CENTER OF CLUSTER. (WHITE AND SILK, AP.J., 99 V241, 864, 1980). X-RAY SOURCE IS EXTENDED. CF. NOTE 249. 100: CLARK, IAU CIRC 2915 (FEB. 24, 1976). 101: OPTICAL POSITION OF HDE 226868. 102: OPTICAL POSITION OF RADIO GALAXY CYGNUS A. (CF. ALSO 102 LONGAIR AND WILLMORE, M.N.R.A.S., V168, 479, 1974). 103: RADIO POSITION; AGREES WITH IR POSITION (BECKLIN ET AL, 103 NATURE (PHYS. SCI.), V239, 130, 1972). 104: SOFT X-RAY SOURCE, POSITION GIVEN IS RADIO AND OPTICAL 104 CENTER OF SNR SHELL; MEAN DIAMETER 2.7 DEG (RAPPAPORT ET 104 AL, AP. J., V194, 329, 1974). 105: SOFT X-RAY SOURCE. TRANSIENT? (COLEMAN ET AL, AP. J. 105 (LETT.), V170, L47, 1971; CF. ALSO BURGINYON ET AL, AP. 105 J., V179, 615, 1973.) CYG X-6 FOUND TO BE PART OF LARGE X-RAY 105 RING 13-DEGREES IN DIAMETER (CASH ET AL., AP.J.(LETT.), 105 V238, L71, 1980). 106: TRANSIENT? (GIACCONI ET AL, AP. J. (LETT.), V148, 119, 106 1967). 107: SOFT X-RAY SOURCE. POSITION GIVEN IS THAT OF SNR HB 21. 107 CF. BURGINYON ET AL, REFERENCE CITED IN NOTE 105. 108: OPTICAL POSITION (REF. IN NOTE 84) OF THE CENTER OF GLOBULAR 108 CLUSTER NGC 7078 = M15. FORD ET AL. (IAU CIRC 3306, NOV. 15, 108 1978) PROPOSE A VARIABLE EMISSION LINE STAR AT 21:27:34.14, 108 +11:56:54.8 AS THE COUNTERPART. 109: TRANSIENT? (MARKERT ET AL, IAU CIRC 2512, MAR. 20, 1973.) 110: OPTICAL POSITION OF STAR (GIACCONI ET AL, AP. J. (LETT.), 110 V148, L129, 1967). 111: SOFT X-RAY SOURCE (HEISE ET AL, ASTRON. AP., V63, L1,1978). 112: OPTICAL CENTER OF SNR CAS A. SHELL DIAMETER 0.08 DEG IN 112 OPTICAL. 113: TRANSIENT SOURCE (RAPPAPORT ET AL, AP. J. (LETT.), V206, 113 L139, 1976). 114: GRIFFITHS AND SEWARD, M.N.R.A.S., V180, 75P, 1977. 115: OPTICAL POSITION OF GALAXY MCG 8-11-11. (WARD, 115 ASTRON & AP., V59, L119, 1977). 116: WILSON ET AL., AP. J. (LETT.), V215, L111, 1977 117: POSITION OF OPTICAL NOVA CONCURRENT WITH TRANSIENT X-RAY 117 SOURCE (IAU CIRC 3110, SEPT. 20, 1977). 118: LI ET AL, IAU CIRC 3125 (OCT. 25, 1977); IAU CIRC 3127 118 (OCT. 31, 1977). STARS PROPOSED AS OPTICAL COUNTERPARTS BY 118 SANDULEAK (CF. ALLEN, IAU CIRC 3143, NOV. 28, 1977) ARE AT 118 00:52:53.3, -73:57:22 (SMC X-2) AND 00:50:19.9, -72:42:26 118 (SMC X-3). MURDIN ET AL. (M.N.R.A.S., V186, 43P, 1979) 118 DISTINGUISH BETWEEN COMPONENTS OF SMC X-2 CANDIDATE AND 118 SUGGEST FAINTER COMPONENT AT 00:52:53.1, -73:57:19 AS ID. 119: DOWER AND KELLEY, IAU CIRC 3144 (NOV. 28, 1977). STAR 119 PROPOSED AS OPTICAL COUNTERPART (MARGON AND BRADT, IBID) AT 119 01:14:41.8, +65:01:32. 120: OPTICAL POSITION OF INTERACTING SEYFERT GALAXY PROPOSED AS 120 COUNTERPART TO 4U0106-59 (WEST, IAU CIRC 3134, NOV. 14, 120 1977). 0.3 DEG FROM CENTER OF X-RAY POSITION. 121: RADIO POSITION OF QSO OR SEYFERT NUCLEUS IDENTIFIED WITH 121 X-RAY SOURCE (APPARAO ET AL, IAU CIRC 3150, DEC. 13, 1977). 121 BEST X-RAY POSITION 02:41:01.3, +62:15:27. REF. IN NOTE 42 121 IDENTIFIES THIS TYPE I SEYFERT AS NGC 931. 122: POSITION OF STELLAR OPTICAL COUNTERPART (MCCLINTOCK, NOTE 70). 123: COMINSKY ET AL, IAU CIRC 3163 (JAN. 18, 1978). SOURCE 123 DESCRIBED AS RECURRENT TRANSIENT. JOHNSTON ET AL (IBID) 123 GIVE A POSITION OF 01:15:13.7, +63:28:41. 124: WHITE AND RICKETTS, M.N.R.A.S., V181, 435, 1977. THEY 124 SUGGEST THE QSO PKS0349-14 AS THE OPTICAL COUNTERPART. 125: POSITION GIVEN THAT OF OPTICAL COUNTERPART. 125 (DAVIDSEN ET AL, AP. J., V203, 448,1976). 126: CF REFERENCE IN NOTE 78. 127: SHARE ET AL, IAU CIRC 3169 (FEB. 2, 1978). MAY BE SNR 127 MSH 11-54. 128: WOOD ET AL, IAU CIRC 3169 (FEB. 2, 1978). 129: POSITION OF QSO MR2251-178. BEST X-RAY POSITION 22:51:25.4, 129 - 17:50:40. CF. RICKER ET AL., NATURE, V271, 35,1978. 130: OPTICAL POSITION (MARSHALL ET AL., AP.J.SUPPL., V40, 657,1979) 130 CORRESPONDING X-RAY SOURCES ARE H1310+371, H1649-595 AND 130 H2209-471. 131: POSITION OF SAO 015338, OPTICAL COUNTERPART (REF, NOTE 242). 132: OPTICAL POSITION OF STAR R148. BEST X-RAY POSITION 05:40:04.8, 132 -69:46:04 (JOHNSTON ET AL., AP. J., V233, 514, 1979). PAKULL 132 (IAU CIRC 3475, MAY 12, 1980) PROPOSES COWLEY'S STAR 32, 132 6" FROM R148 AT 05:40:05.5, -69:46:03.6, AS ID. 133: DOXSEY ET AL, IAU CIRC 3113 (SEPT. 28, 1977). TRANSIENT? 134: SCHNOPPER ET AL., AP. J. (LETT.), V222, L91, 1978. POSITION 134 GIVEN IS THAT OF RADIO FLARE SOURCE AT POSITION OF OPTICAL 134 GALAXY. CF ALSO REF, NOTE 260. 135: POSITION GIVEN IS THAT OF X-RAY SOURCE (PINEDA AND SCHNOPPER, 135 IAU CIRC 3190, MAR. 13, 1978). GALAXY MCG -5-23-16 AT 135 09:45:28.43, -30:42:57.0. 136: POSITION OF X-RAY SOURCE (PINEDA ET AL, IAU CIRC. 3202, MAR. 136 29, 1978). GALAXY MCG -6-30-15 AT 13:33:01.48, -34:02:30.4. 137: WALTER ET AL, IAU CIRC. 3208 (APR. 13,1978). CF. ALSO REF, 137 NOTE 242. 138: WALTER AND MASON, IAU CIRC. 3221 (MAY 18, 1978). MAY BE 138 BL LAC OBJECT, GALAXY MK421. 139: RECURRENT TRANSIENT IN LMC (JOHNSTON ET AL., AP.J.(LETT.), 139 V230, L11, 1979). POSITION GIVEN IS THAT OF SUGGESTED 139 COUNTERPART, A V=12.8 MAG B2IAB STAR IN LMC. 140: SMITH, M.N.R.A.S., V182, 39P, 1978. 141: TUOHY AND GARMIRE, AP.J.(LETT.), V239, L107, 1980. IDENTIFIED 141 AS POINT SOURCE IN SNR RCW 103 (G332.4-0.4). 142: SNR W44, DIAMETER 27 MIN. GRONENSCHILD ET AL, ASTRON. & AP., 142 V65, L9, 1978. A1850+00 IS SAME SOURCE. 143: JERNIGAN ET AL, NATURE, V272, 701, 1978. 144: OPTICAL POSITION OF SUGGESTED STELLAR COUNTERPART (REF. IN 144 NOTE 167). BEST X-RAY POSITION IS 12:54:19.7, -69:01:03 144 (DOWER ET AL., NATURE, V273, 364, 1978). 145: OPTICAL POSITION OF STAR (MASON ET AL, IAU CIRC 3054, MAR.30, 145 1977) CONFIRMED AS COUNTERPART IN REF. IN NOTE 144. 146: SOFT X-RAY SOURCE. DEN BOGGENDE ET AL, ASTRON. & AP., V67, 146 L29, 1978; IBID, V80, 1, 1980. 147: OPTICAL POSITION OF HD152667 (POLIDAN ET AL, IAU CIRC 3234, 147 JUNE 27,1978). 148: TRANSIENT SOURCE(CORDOVA AND GARMIRE, IAU CIRC 3254, AUG. 15, 148 1978).SUPERNOVA IN MCG -5-9-22 OCCURRING AT SAME TIME WAS AT 148 03:40:07, -28:01.2, APPARENTLY PRECLUDING ITS IDENTIFICATION 148 WITH THE X-RAY SOURCE. CF. ALSO REF., NOTE 266. 149: SOFT X-RAY SOURCE (IAU CIRC 3254, AUG. 15, 1978). ERROR BOX 149 CENTERED IN NW PART OF SNR AND INCLUDES THE OPTICAL 149 FILAMENTS ASSOCIATED WITH HB3. 150: S0 GALAXY WITH SEYFERT NUCLEUS LIES WITHIN ERROR BOX OF 150 H2208-47 (PHILLIPS, IAU CIRC 3256, AUG. 25, 1978). CF. ALSO 150 REF., NOTE 42, AND NOTE 130. 151: BL LAC OBJECT (SCHWARTZ ET AL., AP. J. (LETT.), V229, L53, 151 1979). CF. ALSO WILSON ET AL., M.N.R.A.S., V187, 109,1979. 152: POSITION OF STAR WITH FEATURELESS BLUE CONTINUUM (WADE ET AL., 152 IAU CIRC 3279, OCT. 4, 1978). BEST X-RAY POSITION 21:55:58.7, 152 -30:27:57 (GRIFFITHS ET AL., IBID). PROBABLY IS 2A2151-316. 152 RADIO SOURCE AT 21:55:58.37, -30:27:54 (HJELLMING ET AL., 152 IAU CIRC 3309, NOV.29, 1978). CF. ALSO NOTE 151. 153: OPTICAL POSITION OF 14TH MAGNITUDE BLUE STAR PROPOSED AS 153 COUNTERPART (CHARLES ET AL., AP.J.(LETT.), V231, L131,1979). 154: POSITION OF STAR IN HEAO-1 ERROR BOX (GRIFFITHS ET AL., 154 AP.J.(LETT.), V232, L27, 1979). BEST X-RAY POSITION 154 03:12:00.9, -22:46:46. 155: SOFT X-RAY SOURCE IDENTIFIED WITH SNR G65.2+5.7 (MASON 155 ET AL., AP.J.(LETT.), V230, L163, 1979). 156: CRUDDACE ET AL., AP. J. (LETT.), V222, L95, 1978. 157: OPTICAL POSITION OF STAR SS 433 (KAPLAN ET AL., A.J., 157 V85, 64, 1980. 158: PRAVDO ET AL., AP. J., V223, 537, 1978. 159: GRINDLAY , AP. J. (LETT.), V224, L107, 1978. KRON 3 IS A 159 GLOBULAR CLUSTER IN SMC, AT POSITION GIVEN. POSITION GIVEN FOR 159 4U1722-30 IS THAT OF GLOBULAR CLUSTER TERZAN 2. 160: SCHWARTZ ET AL., AP. J. (LETT.), V224, L103, 1978 161: DELVAILLE ET AL., AP. J. (LETT.), V226, L69, 1978. POSITION 161 GIVEN IS THAT OF SEYFERT GALAXY. X-RAY SOURCE IS 2A1347-300. 162: SOFT X-RAY SOURCE. NUGENT & GARMIRE, AP. J. (LETT.), V226, 162 L83, 1978. 163: OPTICAL POSITION OF BL LAC OBJECT MARKARYAN 421. BEST X-RAY 163 POSITION IS 11:01:39.7, +38:28:51 (HEARN ET AL., 163 AP. J. (LETT.), V227, L63, 1979). TRANSIENT? FLARING SOURCE? 164: BRADT & KELLEY, AP. J. (LETT.), V228, L33, 1979. STAR THETA1 164 ORIONIS C (SAO 132314), IN TRAPEZIUM, INSIDE ERROR BOX. 165: TRANSIENT SOURCE (SCHRIJVER ET AL., ASTRON. AP., V69, L1, 165 1978). 166: CASH ET AL, ASTRON. AP., V72, L6, 1979. OPTICAL POSITION OF 166 SEYFERT GALAXY MKN 541 IS FROM WILSON & MEURS, ASTRON. AP. 166 SUPP., V33, 407, 1978. 167: OPTICAL POSITION OF PROPOSED COUNTERPART (GRIFFITHS ET AL., 167 NATURE, V276, 247, 1978). BEST X-RAY POSITION IS 18:22:22.9, 167 -37:08:09. 168: OPTICAL POSITION OF EX HYDRAE, SUGGESTED COUNTERPART (WATSON 168 ET AL., M.N.R.A.S., V184, 79P, 1978). 169: OPTICAL POSITION OF V843 OPH. SOFT X-RAY SOURCE (BUNNER, IAU 169 CIRC 3339, MAR. 23, 1979). 170: HIGHLY VARIABLE SOFT X-RAY SOURCE (RIEGLER ET AL., IAU CIRC 170 3351, APR. 24, 1979). ALPHA CARINA NEAR CENTER OF ERROR BOX. 171: MARKERT ET AL., AP.J. SUPPL., V39, 573, 1979. 1M1543-475, 171 1M1735-284 AND 1M1901+030 ARE LISTED AS TRANSIENTS. 172: SOFT X-RAY SOURCE. POSITION GIVEN THAT OF SNR MSH 15-56 172 (AGRAWAL AND RIEGLER, IAU CIRC 3343, APR. 6, 1979). 173: TRANSIENT SOURCE? (COMINSKY ET AL., AP.J., V224, 46, 1978.) 174: SOFT X-RAY SOURCE (TOPKA ET AL., AP.J., V229, 662, 1979). 175: SOFT X-RAY SOURCE (TUOHY ET AL., AP.J.(LETT.), V230, L27, 175 1979). IDENTIFIED AS SNR PKS 1209-52 (= G296.5+10.0). 176: MACCAGNI ET AL., ASTRON & AP., V62, 127, 1978. 2A0316-443 176 IDENTIFIED AS "CLUSTER 0316-44". 4U0426-61 IDENTIFIED AS 176 CLUSTER SERSIC 40/6, WHOSE OPTICAL POSITION IS GIVEN. 177: CASH ET AL., AP.J.(LETT.), V232, L111, 1979. THEY IDENTIFY 177 H1605+45 WITH PHI HERCULIS (16:07:11.8, +45:03:48) AND 177 H0242-13 WITH PI CETI (02:41:44.4, -14:04:10). BOTH SOFT 177 SOURCES. 178: SOFT SOURCE. POSITION GIVEN THAT OF 40 ERIDANI. (CASH ET 178 AL., AP. J. (LETT.), V231, L137, 1979). 179: SOFT SOURCE. POSITION GIVEN IS THAT OF AY LYRAE (CORDOVA & 179 GARMIRE, NATURE, V279, 782, 1979). 180: SOFT SOURCE. POSITION GIVEN THAT OF MV LYRAE (MASON ET AL., 180 NATURE, V280, 568,1979). 181: SOFT SOURCE (HEARN AND MARSHALL, AP.J.(LETT.), V232, L21, 181 1979). 182: SCHWARTZ ET AL., A.J., V85, 549, 1980. OPTICAL POSITION. 183: SOFT SOURCE. POSITION GIVEN THAT OF BY DRACONIS (AYRES ET AL., 183 AP.J.(LETT.), V232, L117, 1979). 184: POSITION OF ABELL CLUSTER (SCHWARZ ET AL., AP.J.(LETT.), 184 V 231, L105, 1979). CF. ALSO REF., NOTE 249. 185: GREENHILL ET AL., NATURE, V279, 620, 1979. 186: POSITION OF ABELL CLUSTER (HINTZEN & SCOTT, AP.J.(LETT.), 186 V232, L145, 1979). 187: OPTICAL POSITION OF NGC 931, INTERACTING SEYFERT. WARD & 187 WILSON, ASTRON & AP., V70, L79, 1979. 188: POSITION OF ABELL CLUSTER (HINTZEN & SCOTT, ASTRON. AP., 188 V74, 116, 1979). 189: OPTICAL POSITION OF SEYFERT GALAXY ESO 103-G35 (PHILLIPS 189 ET AL., ASTRON AP., V76, L14, 1979). 190: DULDIG ET AL, M.N.R.A.S., V187, 567, 1979. 191: OPTICAL POSITION OF "SOUTHERN CLUSTER" (MACCAGNI ET AL., 191 ASTRON. AP., V62, 127, 1978; BERTHELSDORF & CULHANE, 191 M.N.R.A.S., V 187, 17P, 1979). THE IDENTIFICATION OF 191 H0630-541 WITH SC 0627 IS PROBABLY INCORRECT (REF., NOTE 267). 192: TRANSIENT SOURCE (KING ET AL., M.N.R.A.S., V187, 77P, 1979). 193: OPTICAL POSITION OF NGC3227. BEST X-RAY POSITION 10:21.2, 193 +19:49 (ELVIS ET AL., M.N.R.A.S., V183, 129,1978). 194: BHAVSAR ET AL., NATURE, V281, 462, 1979. THEY SUGGEST 194 INTERACTING GALAXIES NGC4410A/B AS ID. 195: BELL-BURNELL & CULHANE, M.N.R.A.S., V188, 1P, 1979. OPTICAL 195 POSITION OF SEYFERT GALAXY IS GIVEN. 196: LI ET AL, NATURE, V276, 799, 1978. 197: OPTICAL POSITION OF NRAO 140 (H0333+317) AND NRAO 530 197 (H1734-127) GIVEN (MARSCHER ET AL., AP. J., V233, 498, 1979). 198: OPTICAL POSITION OF VARIABLE STAR (THORSTENSEN ET AL, 198 AP. J. (LETT.), V233, L57, 1979). (NOTE MISPRINT OF 49 DEG FOR 198 47 DEG IN REF.) 199: OPTICAL POSITION OF WARREN & PENFOLD'S STAR (REF, NOTE 132). 199 BEST X-RAY POSITION 05:38:38.2, -64:06:31. 200: REF, NOTE 132. SOURCE PROBABLY IN LMC. THORSTENSON ET AL 200 (IAU CIRC 3449, JAN. 30, 1980) SUGGEST STAR AT 05:44:15.6, 200 -66:34:59 AS OPTICAL COUNTERPART. 201: 2S0549-074. OPTICAL POSITION OF SEYFERT GALAXY GIVEN (BRADT 201 ET AL., AP. J. (LETT.), V226, L111, 1978). 202: OPTICAL POSITION OF UX ARIETIS (WALTER ET AL., AP. J. (LETT.), 202 V225, L119, 1978). 203: X-RAY POSITION OF PUP A SNR (ZARNECKI ET AL., NATURE PHYS. 203 SCI., V243, 4, 1973). OPTICAL CENTER AT 08:21:18, -42:52.0. 204: GARMIRE ET AL., IAU CIRC 3125, OCT. 25, 1977. FLARING SOURCE. 205: OPTICAL POSITION OF NGC 5548. (HAYES ET AL, M.N.R.A.S., V193, 205 15P, 1980.) 206: OPTICAL POSITION OF SV CAM IS GIVEN FOR H0630+82. RS CVN 206 BINARY SYSTEM. (AGRAWAL ET AL., M.N.R.A.S., V192, 725, 1980). 207: OPTICAL POSITION OF K3V STAR COINCIDENT WITH TRANSIENT RADIO 207 SOURCE (MURDIN ET AL., M.N.R.A.S., V192, 709, 1980). 208: OPTICAL POSITION OF TYPE I SEYFERT GALAXY (HAYES ET AL., 208 M.N.R.A.S., V192, 1P, 1980). ESO 012-G21 MAY BE 3U0055-79, 208 WHICH WAS NOT LISTED IN THE 4U CATALOGUE. MKN 464 POSITION 208 IS GIVEN FOR H1350+390. 209: REF., NOTE 42. AGRAWAL ET AL. (M.N.R.A.S., V190, 853, 1980) 209 PROPOSE RS CVN STAR HD146361 IN BINARY SIGMA COR BOR, AT 209 16:12:48.3,|+33:59:02.6 AS ID. 210: MUFSON ET AL., IAU CIRC 3471 (APR. 28, 1980). 211: WARNER ET AL., IAU CIRC 3511 (SEPT. 8, 1980). 212: OPTICAL POSITION OF GLOBULAR CLUSTER PROPOSED BY GRINDLAY 212 (IAU CIRC 3506, AUG. 20, 1980) AS ID OF X-RAY BURST SOURCES 212 AT 17:32, -30.3 (TRZ 1) AND 17:45, -24.8 (TRZ 5) (ODA, IBID). 213: X-RAY POSITION (BIGNAMI ET AL., IAU CIRC 3518, SEPT.26, 1980). 213 SUGGEST STAR LSI+61-303, AT 02:36:40.7, +61:00:50, AS ID. 214: SHARE ET AL., NATURE, V282, 692, 1979. SUGGESTED ID'S: 214 STAR MWC 740 (H0454+27); 3C133 (H0500+24); CLUSTER NGC2304 214 OR STAR HD51354 (H0649+17). H0649+17 IS LABELLED "MARGINAL 214 DETECTION". 215: CORDOVA & MASON, NATURE, V287, 25, 1980. SOFT X-RAY SOURCE. 216: RADIO POSITION OF PULSAR REPORTED DETECTED ABOVE 80 KEV 216 (MANDROU ET AL., NATURE, V287, 124, 1980). 217: OPTICAL POSITION OF GALAXY NGC 7582 (CLAVEL ET AL, 217 M.N.R.A.S., V192, 769, 1980). 218: RADIO POSITION OF SNR G292.0+1.8 = MSH 11-54 (CLARK ET AL., 218 M.N.R.A.S., V193, 129, 1980). 219: POSITION OF CLUSTER CENTER (MITCHELL ET AL, M.N.R.A.S., 219 V189, 329, 1979). CF. ALSO REF., NOTE 249. 220: 4U POSITION. HINTZEN & SCOTT (AP. J. (LETT.), V232, L145, 220 1979) SUGGEST CLUSTER ABELL 262 AS THE ID. A 262 CENTER AT 220 01:49.9, +35:55. 221: TUOHY ET AL., M.N.R.A.S., V189, 59P, 1979. IDENTIFY SNR HB9, 221 AT 04:57, +46:30, DIAMETER 2.3 DEG, AS OPTICAL COUNTERPART. 222: GREGORY & FAHLMAN, NATURE, V287, 805, 1980. SNR G109.1-1.0 222 IDENTIFIED AS OPTICAL COUNTERPART. 223: SCHILD ET AL., A. J., V85, 121, 1980. 224: OPTICAL POSITION OF BARRED SPIRAL GALAXY. WARD ET AL., AP.J., 224 V223, 788,1978. 225: APPARAO ET AL., ASTRON. & AP., V89, 249, 1980. 226: OPTICAL POSITION OF NOVA DELPHINI 1967 (HUTCHINGS, PASP, 226 V92, 458, 1980). 227: OPTICAL POSITION (HELFAND, PASP, V92, 691, 1980). 228: REPETITIVE SOFT GAMMA-RAY BURST SOURCE (MAZETS ET AL., 228 SOV. ASTRON. LETT., V5, 343, 1979). 229: OPTICAL POSITION (STEINER ET AL., IAU CIRC. 3529, OCT. 28, 229 1980). STAR IS AN IRREGULAR (CATACLYSMIC?) VARIABLE. 230: OPTICAL POSITION OF STAR (CHLEBOWSKI ET AL., IAU CIRC. 3529, 230 OCT. 28, 1980). CATACLYSMIC VARIABLE. AM HER TYPE? 231: OPTICAL POSITION OF HD 8357 IS GIVEN FOR H0123+075 = H0118 231 +075 AND HD 101379 FOR 4U1137-65. BOTH STARS ARE RS CVN 231 BINARIES. (GARCIA ET AL., AP.J.(LETT.), V240, L107, 1980) 232: POSITION GIVEN FOR 4U1722-30 IS THAT OF GLOBULAR CLUSTER 232 TERZAN 2. (GRINDLAY ET AL, AP. J. (LETT.), V240, L121, 1980) 233: (WILSON, AP. J. (LETT.), V241, L19, 1980). 1E2014.1+3702 IS 233 IN SNR G74.9+1.2. 1E2014.1+3702 AND 2013.7+3701 ARE EXTENDED 233 X-RAY SOURCES. 234: OPTICAL POSITION OF CATACLYSMIC VARIABLE (PATTERSON ET AL., 234 AP. J. (LETT.), V240, L133, 1980). 235: OB STAR (LONG AND WHITE, AP. J.(LETT.), V239, L65, 1980). 236: OPTICAL POSITION OF STAR GIVEN (WALTER ET AL., AP. J.(LETT.), 236 V236, L137, 1980). 237: OPTICAL POSITION OF STAR GIVEN. SOURCE MAY BE SPURIOUS 237 (REF. GIVEN IN NOTE 236). 238: QSO (GRINDLAY ET AL., AP. J.(LETT.), V239, L43, 1980). 239: POSITION OF CENTER OF ABELL CLUSTER GIVEN (ULMER ET AL., 239 AP.J., V235, 351, 1980). 240: X-RAY PULSAR (LAMB ET AL., AP. J., V239, 651, 1980). 241: TYPE 1 SEYFERT GALAXY (REF. GIVEN IN NOTE 42). POSITION OF 241 MKN 279 IS GIVEN FOR 2A1348+700, BUT MCG 12-13-24, 241 40" EAST, IS SUGGESTED AS ID. POSITION OF MKN 509 IS 241 GIVEN FOR X-RAY SOURCE 2A2040-115. 242: RS CANUM VENATICORUM SYSTEM (WALTER ET AL., AP.J., V236, 242 212, 1980). 243: X-RAY SOURCE IN BAR OF LMC. X-RAY POSITION GIVEN. 243 (MCKEE ET AL., AP.J., V238, 93, 1980) N132D IS SNR IN LMC. 244: X-RAY FLARE SOURCE. OPTICAL POSITION OF DME STARS AT MIC AND 244 AD LEO GIVEN (KAHN ET AL., AP.J.(LETT.), V234, L107, 1979). 245: W URSAE MAJORIS STAR. BRIGHTEST OBJECT IN THE ERROR BOX FOR 245 3U2041+75 (CARROLL ET AL., AP.J. (LETT.), V235, L77, 1980). 246: OPTICAL CENTER OF CLUSTER (HENRY ET AL., AP.J.(LETT.), 246 V234, L15, 1979). 247: SOFT X-RAY SOURCE, POSSIBLY OLD SNR IN LUPUS (RIEGLER ET AL., 247 AP.J.(LETT.), V235, L71, 1980). 248: OPTICAL POSITION OF STAR OF STAR IN CYG OB2 ASSOCIATION 248 (HARNDEN ET AL., AP.J.(LETT.), V234, L51, 1979). 249: X-RAY POSITION OF CENTER OF EXTENDED X-RAY SOURCE IN ABELL 249 CLUSTER. RADIO GALAXY 3C264=NGC 3862 IS POINT X-RAY SOURCE IN 249 A1367, AND RADIO GALAXY WE1601+16W3 IS POINT SOURCE IN A2147. 249 (JONES ET AL., AP.J.(LETT.), V234, L21, 1979). CF. NOTE 246 249 FOR A1413. 250: MAY BE OLD SUPERNOVA REMNANT. X-RAY SOURCE EXTENDED 2.8 DEG. 250 (STERN ET AL., AP.J.(LETT.), V238, L77, 1980). 251: OPTICAL POSITION OF SNR IN LMC. (LONG & HELFAND, AP.J.(LETT.), 251 V234, L77,1979.) DEM = DAVIES, ELLIOTT & MEABURN, MEM. RAS, 251 V81, 89, 1976. DEM 249 IS LISTED INCORRECTLY AS DEM 240 IN 251 LONG AND HELFAND. OPTICAL POSITION OF N158A FOUND IN THE 251 FOLLOWING: (MATHEWSON ET AL., AP.J.(LETT.), V242, L73, 1980). 252: OPTICAL POSITION OF SNR IN LMC (MATHEWSON ET AL., AP. J. 252 (LETT.), V242, L73, 1980). 253: EXTENDED X-RAY SOURCE NGC 5920 IS CD GALAXY IN CLUSTER MKW 3S 253 AND NGC 6051 = 4C 24.36 IS CD GALAXY IN CLUSTER AWM 4 (KRISS 253 ET AL., AP.J.(LETT.), V235, L61, 1980). 254: NGC 5171 IS BRIGHTEST MEMBER OF COMPACT CLUSTER MKW 11. 254 2A0335+096 IS LOCATED IN COMPACT CLUSTER ZW 0335.1+0956 254 (SCHWARTZ ET AL., AP.J.(LETT.), V238, L59, 1980). 255: OPTICAL POSITION OF SEYFERT 1 GALAXY AKN 120 (MUSHOTZKY AND 255 MARSHALL, AP.J.(LETT.), V239, L5, 1980). 256: X-RAY POSITION GIVEN (GIACCONI ET AL., AP.J.(LETT.), V234, L1, 256 1979). 257: OPTICAL POSITION GIVEN FOR QSO (KU ET AL., NATURE, 257 V288, 323, 1980). 258: X-RAY POSITION (REF., NOTE 130). NGC 918 IS IN ERROR BOX OF 258 H0220+184, NGC 3227 IS IN ERROR BOX OF H1019+203, AND 258 NGC 7172 IS IN ERROR BOX OF H2158-321. 259: H0349+17 = V471 TAU AND H1938+16 = UU SGE (VAN BUREN ET AL., 259 AP.J.(LETT.), V242, L105, 1980). 260: OPTICAL POSITION OF SEYFERT GALAXY (KRISS ET AL., AP.J., 260 V242, 492, 1980). 261: V645 CEN = DME FLARE STAR PROXIMA CENTAURI, FOR WHICH THE 261 OPTICAL POSITION IS GIVEN. OTHER SOURCES ARE X-RAY POSITIONS. 261 (HAISCH ET AL., AP.J.(LETT.), V242, L99, 1980). 262: OPTICAL POSITION OF GALAXY IN THE VIRGO CLUSTER (FORMAN ET 262 AL., AP.J.(LETT.), V234, L27, 1979). M86 IS EXTENDED X-RAY 262 SOURCE. 263: AYERS ET.AL., AP.J.(LETT.), V232, L117, 1979. 264: OPTICAL POSITION GIVEN (SEWARD ET.AL., AP.J.(LETT.), V234, 264 L5, 1979). ETA CARINA EXTENDED X-RAY SOURCE WHICH COINCIDES 264 WITH OPTICAL OUTER SHELL. 265: X-RAY SOURCE IN ORION NEBULA (KU & CHANAN, AP.J.(LETT.), 265 V234, L59, 1979). 266: SOFT X-RAY TRANSIENT (NOUSEK ET AL., AP.J., V242, 1107, 1980). 267: PRAVDO ET AL., AP.J., V234, 1, 1979. 268: T TAURI STAR (GAHM, AP.J.(LETT.), V242, L163, 1980). 269: OPTICAL POSITION OF ABELL CLUSTER (MCKEE ET AL., AP.J., V242, 269 843, 1980).