2003ApJ...598..458R

Query : 2003ApJ...598..458R

2003ApJ...598..458R - Astrophys. J., 598, 458-473 (2003/November-3)

A limit on the number of isolated neutron stars detected in the ROSAT bright source catalogue.

RUTLEDGE R.E., FOX D.W., BOGOSAVLJEVIC M. and MAHABAL A.

Abstract (from CDS):

The challenge in searching for non-radio-pulsing isolated neutron stars (INSs) is in excluding association with objects in the very large error boxes (∼13", 1 σ radius) typical of sources from the largest X-ray all-sky survey, the ROSAT All-Sky Survey Bright Source Catalogue (RASS BSC). We search for candidate INSs using statistical analysis of optical (USNO-A2), infrared (IRAS), and radio (NVSS) sources near the ROSAT X-ray localization and show that this selection would find 20% of the INSs in the RASS BSC. This selection finds 32 candidates at declinations δ>-39°, among which are two previously known INSs, 17 sources that we show are not INSs, and 13 the classification of which are as yet undetermined. These results require a limit of less than 67 INSs (90% confidence, full sky, assuming isotropy) in the RASS BSC. This limit modestly constrains a naive and optimistic model for cooling neutron stars in the Galaxy.

Abstract Copyright: ∼

Journal keyword(s): Stars: Neutron - X-Rays: Stars

Simbad objects: 43

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Number of rows : 43
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 RX J0201.7+0117 ** 02 01 46.77 +01 17 11.9     12.372   9.791 ~ 9 0
2 CXOU J020317.6-243837 X 02 03 17.6 -24 38 32           ~ 4 0
3 1RXS J024528.9+262039 * 02 45 28.9 +26 20 39           ~ 4 0
4 2MASS J02453008+2620233 * 02 45 30.1016598216 +26 20 22.999462944           ~ 4 0
5 USNO-A2.0 1125-00881152 * 02 45 30.19 +26 20 24.3           ~ 1 0
6 RX J0249.7-3825 EB* 02 49 45.9210066528 -38 25 36.838473384       11.453 9.859 K5III+K5III 10 0
7 V* EF Eri CV* 03 14 13.2526234800 -22 35 42.900077688   15.4 14.53 13.5   ~ 433 0
8 2E 756 ULX 03 18 22.00 -66 36 04.3   23.5 23.6     O9.5 240 3
9 RX J0326.3+1131A TT* 03 26 21.2583233856 +11 30 54.139731508   15.406 14.442 14.795   M2Ve 9 0
10 G 247-15 Er* 04 12 17.0151268793 +64 43 55.623443492   15.1   13.381   M4 36 0
11 RX J0420.0-5022 N* 04 20 02.2 -50 22 46     25.5     ~ 93 0
12 G 8-41 Er* 04 33 33.9630342177 +20 44 45.842102220   16.21 14.530 14.133 11.43 M5V 42 0
13 V* V1309 Ori CV* 05 15 41.4123253872 +01 04 40.481073984           M0.5 108 0
14 CD-35 2213 LM* 05 17 22.9075362984 -35 21 54.659549736   13.26 11.69 10.48 8.91 M4Ve 45 0
15 RX J0720.4-3125 N* 07 20 24.961 -31 25 50.21   26.1   27.0   ~ 303 0
16 G 253-6 Er* 07 55 53.9285264465 +83 23 04.942987417   14.2   12.7   M5.0V 68 0
17 RX J0806.4-4123 N* 08 06 23.0 -41 22 33           ~ 80 0
18 2MASX J09101004+4813419 Sy1 09 10 10.0134721248 +48 13 41.703668508   17.31 17.05     ~ 112 0
19 2MASS J09440253+5732092 Sy1 09 44 02.5114613040 +57 32 09.089095380   18.47 18.21     ~ 32 0
20 2WHSP J094432.2+573535 BLL 09 44 32.3360266464 +57 35 36.123040284   20.57 20.03 19.7   ~ 18 0
21 V* FH UMa CV* 10 47 09.88 +63 35 13.6   19.4       ~ 25 0
22 RX J1153.1+5456 X 11 53 09.8 +54 56 36           ~ 5 0
23 [ZEH2003] RX J1229.6+1816 1 BLL 12 29 41.2 +18 16 41           ~ 6 0
24 Wolf 424 ** 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 321 0
25 [VV2000c] J125015.0+192350 Sy1 12 50 14.9764765392 +19 23 50.461172592   19.82 19.52     ~ 12 0
26 Wolf 461 Er* 13 00 33.5221795982 +05 41 07.996620384   15.12   13.041   M4.5Ve 133 0
27 [B68b] 286 QSO 13 04 02.7422601528 +35 33 16.791233508   19.25       ~ 37 0
28 RX J1305.7+6412 * 13 05 47.2 +64 12 52           ~ 7 0
29 V* EV UMa CV* 13 07 53.8583243765 +53 51 30.498937628           ~ 66 0
30 RBS 1223 N* 13 08 48.7 +21 27 08   28.6 28.6     ~ 157 1
31 PM J13285-3654 LM* 13 28 32.9408349264 -36 54 23.364229824   15.42 13.926 13.644   M3.5 13 0
32 RX J1342.1+2822 CV* 13 42 09.75 +28 22 47.5           Ss 38 1
33 RX J1450.1+6559 CV* 14 50 11.23 +65 59 44.7           ~ 6 0
34 RX J1452.5+3235 X 14 52 35.0 +32 35 36           ~ 5 0
35 V* V489 Ser CV* 15 55 31.9965141790 -00 10 55.061446376       19.5   ~ 17 2
36 RBS 1556 N* 16 05 18.9 +32 49 07     26.8     ~ 101 1
37 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 438 0
38 EGGR 258 WD* 16 34 21.5518633862 +57 10 08.868180953       14.770   DQ8 121 0
39 2MASS J16390987+5656443 AGN 16 39 09.8978836944 +56 56 44.273743044   19.2       ~ 7 0
40 RX J1856.6-3754 Psr 18 56 35.11 -37 54 30.5     25.7     ~ 437 0
41 RBS 1774 N* 21 43 03.8 +06 54 20           ~ 78 0
42 L 863-30 Er* 23 15 43.7972584212 -12 21 49.124784499   14.298 12.795 12.531   M2 26 0
43 G 68-5 LM* 23 17 28.1434392636 +19 36 47.216769536   13.69   11.627   M2V 62 0

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