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J/ApJ/575/354       Young stellar objects in the NGC 1333    (Getman+, 2002)

Chandra study of young stellar objects in the NGC 1333 star-forming cloud. Getman K.V., Feigelson E.D., Townsley L., Bally J., Lada C.J., Reipurth B. <Astrophys. J. 575, 354 (2002)> =2002ApJ...575..354G
ADC_Keywords: Clusters, open ; Stars, early-type ; X-ray sources ; Photometry, infrared Keywords: open clusters and associations: individual (NGC 1333) - stars: early-type - stars: pre-main-sequence - X-rays: stars Abstract: NGC 1333, a highly active star formation region within the Perseus molecular cloud complex, has been observed with the ACIS-I detector on board the Chandra X-Ray Observatory. In our image with a sensitivity limit of ∼1928erg/s, we detect 127 X-ray sources, most with subarcsecond positional accuracy. While 32 of these sources appear to be foreground stars and extragalactic background, 95 X-ray sources are Identified with known cluster members. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 110 109 ACIS NGC 1333 sources and stellar identifications notes.dat 79 50 Notes table2.dat 122 109 X-ray properties of NGC 1333 sources
See also: J/A+A/401/543 : XMM-Newton observations of NGC 1333 (Preibisch, 2003) J/A+AS/106/165 : Near-IR imaging photometry of NGC 1333 (Aspin+ 1994) J/AJ/111/1964 : JHK photometry of NGC 1333 (Lada+, 1996) J/AJ/127/1131 : NGC 1333 low-mass stars infrared photometry (Wilking+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [GFT2002] X-ray source number 5- 14 A10 --- --- [CXONGC1333] 15- 31 A17 --- CXONGC1333 X-ray source name (G1) 33- 34 I2 h RAh Hour of Xray source Right Ascension (J2000) 36- 37 I2 min RAm Minute of Xray source Right Ascension (J2000) 39- 43 F5.2 s RAs Second of Xray source Right Ascension (J2000) 45 A1 --- DE- Sign of the X-ray source Declination (J2000) 46- 47 I2 deg DEd Degree of X-ray source Declination (J2000) 49- 50 I2 arcmin DEm Arcminute of X-ray source Declination (J2000) 52- 55 F4.1 arcsec DEs Arcsecond of X-ray source Declination (J2000) 57- 59 F3.1 arcmin Theta Distance from the aimpoint of ACIS field 61- 62 I2 --- P97 ? Preibisch (1997A&A...324..690P) source number 64- 66 I3 --- HH ? Herbig & Jones (1983AJ.....88.1040H) optical counterpart number, HH NNA 68- 70 A3 --- [BR2001] [yes ] Visible in Bally & Reipurth (2001ApJ...546..299B) Hα/[S II] image 72- 74 F3.1 arcsec X-USNO ? Xray - USNO-A2.0 offset if listed in the USNO-A2.0 (Cat. I/252) 76- 79 F4.1 mag Imag ? The KPNO image I band magnitude 81 A1 --- f_Imag [Cy] Flag on Imag (2) 83- 85 I3 --- ASR ? Aspin et al. (1994, Cat. J/A+AS/106/165) NIR counterpart number 87- 89 I3 --- LAL ? Lada et al. (1996AJ....111.1964L) NIR counterpart number 91 A1 --- f_LAL [B] Blending flag on LAL (3) 93- 97 F5.2 mag Kmag ? The Lada et al. (1996AJ....111.1964L) K band magnitude (4) 99-102 F4.2 mag J-H ? The Lada et al. (1996AJ....111.1964L) (J-H) color index 104-107 F4.2 mag H-K ? The Lada et al. (1996AJ....111.1964L) (H-K) color index 109-110 I2 --- Notes ? Note code on other counterparts, in notes.dat file
Note (2): Flag on Imag as follows: y = star is saturated; C = confused region where X-ray position lost in the glare of a nearby source or reflection nebula. Note (3): 'B' denotes blended cases where ACIS resolved a close double that is unresolved in the infrared data. Note (4): Except for sources 9, 35 and 51, we use the photometry of Aspin (1994, Cat. J/A+AS/106/165).
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Note Code number of the note 3- 79 A77 --- Text Text of the note
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [GFT2002] X-ray source number 5- 14 A10 --- --- [CXONGC1333] 15- 31 A17 --- CXONGC1333 X-ray source name (G1) 33- 36 I4 ct Cxtr Extracted full band (0.5-8keV) counts from Rad 38- 39 I2 ct Bxtr Extracted full band (0.5-8keV) background counts 41- 44 F4.1 arcsec Rad Event extraction radius 46- 49 F4.2 --- Frac Fraction of source's events within Rad 51- 54 F4.1 ct/ks CR Average source count rate 56- 61 A6 --- VClass Variability class (2) 63 A1 --- l_logNH Limit flag on logNH 64- 67 F4.1 [cm-2] logNH ? Log of the model hydrogen column density 69- 72 F4.1 [cm-2] e_logNH ? Lower 1σ error on logNH 74- 78 F5.2 [cm-2] E_logNH ? Upper 1σ error on logNH 80 A1 --- l_kT Limit flag on kT 81- 84 F4.1 keV kT ? Model plasma energy 86- 88 F3.1 keV e_kT ? Lower 1σ error on kT 90- 93 F4.1 keV E_kT ? Upper 1σ error on kT 95 A1 --- l_logLs Limit flag on logLs 96- 99 F4.1 [10-7W] logLs ? Log of soft-band (0.5-2keV) luminosity (3) 101 A1 --- l_logLh Limit flag on logLh 102-105 F4.1 [10-7W] logLh ? Log of hard-band (2-8keV) luminosity (3) 107 A1 --- l_logLt Limit flag on logLt 108-111 F4.1 [10-7W] logLt ? Total band (0.5-8keV) luminosity (3) 113 A1 --- l_logLc Limit flag on logLc 114-117 F4.1 [10-7W] logLc ? Total band luminosity corrected for estimated interstellar absorption (3) 119-121 A3 --- Notes Details of non-standard spectral fit (4)
Note (2): Variability class as follows: Flare = flare Pos fl = possible flare Const = constant Note (3): Assuming a distance of 318pc and units of erg/s. Note (4): Details of non-standard spectral fit as follows: a = kT and logNH may be unreliable but are reported here to allow the reproduction of the spline-like fits to the event distribution for the calculation of broad-band luminosities logLt. b = Fitted plasma energies above ∼ 10 keV and column densities below ∼20.0cm-2 are not well-determined. c = Foreground stars: #5 (distance is less than 318c) and #33 (distance is 192pc, Preibisch (1997A&A...324..690P)). d = No spectral fit is done as a result of a small number of counts. Most of these sources have an approximate X-ray luminosity logLt~=1028erg/s.
Gloibal notes: Note (G1): Source name in IAU format CXONGC1333 JHHMMSS.s+DDMMSS.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 06-Feb-2003
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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