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J/ApJ/563/L49   IR counterpart of the X-ray pulsar 1E 2259+586 (Hulleman+, 2001)

A possible faint near-infrared counterpart to the anomalous X-ray pulsar 1E 2259+586. Hulleman F., Tennant A.F., van Kerkwijk M.H., Kulkarni S.R., Kouveliotou C., Patel S.K. <Astrophys. J. 563, L49 (2001)> =2001ApJ...563L..49H
ADC_Keywords: Pulsars ; X-ray sources ; Infrared sources ; Cross identifications Keywords: stars: neutron - X-rays: individual (1E 2259+586) - X-rays: stars Abstract: We present near-infrared and optical observations of the field of the anomalous X-ray pulsar 1E 2259+586 taken with the Keck telescope. We derive a sub-arcsecond Chandra position and tie it to our optical reference frame using other stars in the field. We find a very faint source, KS=21.7±0.2mag, with a position coincident with the Chandra position. We argue that this is the counterpart. In the J, I, and R bands, we derive (2σ) limits of 23.8, 25.6, and 26.4mag, respectively. As with 4U 0142+61, for which a counterpart has previously been found, our results are inconsistent with models in which the source is powered by accretion from a disk but may be consistent with the magnetar model. Objects: ------------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------------- 23 01 07.9 +58 52 46 1E 2259+58.6 = 2E 2259.0+5836 ------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 54 27 Positions and magnitudes of selected objects table2.dat 90 15 Chandra X-ray point sources on S3 and their (tentative) counterparts
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 A2 --- [HTV2001] Object designation 4- 5 I2 h RAh Right ascension (J2000.0) 7- 8 I2 min RAm Right ascension (J2000.0) 10- 15 F6.3 s RAs Right ascension (J2000.0) 17 A1 --- DE- Declination sign (J2000.0) 18- 19 I2 deg DEd Declination (J2000.0) 21- 22 I2 arcmin DEm Declination (J2000.0) 24- 28 F5.2 arcsec DEs Declination (J2000.0) 30- 35 F6.3 mag Jmag ? J magnitude 37- 41 F5.3 mag e_Jmag ? rms uncertainty on Jmag 43- 48 F6.3 mag Ksmag Ks magnitude 50- 54 F5.3 mag e_Ksmag rms uncertainty on Ksmag
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 A2 --- [HTV2001] Name of the X-ray source (XN) 4 A1 --- n_[HTV2001] [be] Individual notes (1) 6- 8 F3.1 arcsec Size Approximate image size of the X-ray source 10- 12 I3 --- Ct Number of counts detected of the X-ray source 14- 15 I2 h RAh X-ray source Right ascension (J2000.0) 17- 18 I2 min RAm X-ray source Right ascension (J2000.0) 20- 25 F6.3 s RAs X-ray source Right ascension (J2000.0) 27 A1 --- DE- X-ray source Declination sign (J2000.0) 28- 29 I2 deg DEd X-ray source Declination (J2000.0) 31- 32 I2 arcmin DEm X-ray source Declination (J2000.0) 34- 38 F5.2 arcsec DEs X-ray source Declination (J2000.0) 40- 43 F4.2 arcsec r.99 X-ray source 99% confidence error radius 45- 57 A13 --- Name Name of the possible counterpart 59 A1 --- n_Name [cd] Note on Name (1) 61- 62 I2 h RACh ? Counterpart right ascension (J2000.0) 64- 65 I2 min RACm ? Counterpart right ascension (J2000.0) 67- 72 F6.3 s RACs ? Counterpart right ascension (J2000.0) 74 A1 --- DEC- ? Counterpart declination sign (J2000.0) 75- 76 I2 deg DECd ? Counterpart declination (J2000.0) 78- 79 I2 arcmin DECm ? Counterpart declination (J2000.0) 81- 85 F5.2 arcsec DECs ? Counterpart declination (J2000.0) 87- 90 F4.2 arcsec rC.99 ? Counterpart 99% confidence error radius
Note (1): Notes as follows: b = X1 and X2 are RP1 and RP2 of Rho & Petre (1997ApJ...484..828R), respectively. c = USNO-A2.0 identifier. d = Epochs are 1953.830 for DSS1 and USNO-A2.0, 1989.668 for DSS2, and 2000.885 for P60. e = There is an extended source at this position on the edge of a plate taken with LRIS in 1997.
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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