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J/AJ/123/304 BV(RI)_C_JHK H{alpha} photometry in IC 5146 (Herbig+, 2002)
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The young cluster IC 5146.
Herbig G.H., Dahm S.E.
<Astron. J. 123, 304 (2002)>
=2002AJ....123..304H
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ADC_Keywords: Clusters, open ; Stars, emission ; Stars, pre-main sequence ;
Photometry, CCD ; Photometry, UBVRI ; Photometry, H-alpha ;
Photometry, infrared
Keywords: open clusters and associations: individual (IC 5146) -
stars: emission-line, Be - stars: formation - stars: pre-main-sequence
Abstract:
The B0V star BD+46 3474 lies near the front surface of a dense
molecular cloud and illuminates the emission/reflection nebula IC
5146. The HAeBe variable BD +46 3471 is embedded in the same cloud,
about 10' (3.5pc) away. CCD photometry in BV(RI)_C_ (to V=22) and in
JHK (to about K=16.5) has been obtained for the young clusters
surrounding each of these two bright stars. Some 100 emission-H{alpha}
stars brighter than R=20.5 have been found in the area, most of them
in IC 5146. (Among these are two that have spectra resembling a
high-excitation Herbig-Haro [HH] object plus a stellar continuum).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 380 Pre-main-sequence candidates in IC 5146
table2.dat 102 310 Pre-main-sequence candidates in the area of
BD+46 3471
table3.dat 30 64 Spectral classifications
table4.dat 76 21 Walker (1959ApJ...130...57W) variables
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Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [HD2002] Star identification number ([HD2002] Star NNN)
5 A1 --- f_[HD2002] [abf] Flag on [HD2002] (1)
7- 15 A9 --- OName Other identification numbers (G1)
17- 19 I3 --- IHa [104/186]? The IH{alpha} number
21- 22 I2 h RAh Hour of Right Ascension (J2000) (2)
24- 25 I2 min RAm Minute of Right Ascension (J2000) (2)
27- 31 F5.2 s RAs Second of Right Ascension (J2000) (2)
33 A1 --- DE- Sign of the Declination (J2000) (2)
34- 35 I2 deg DEd Degree of Declination (J2000) (2)
37- 38 I2 arcmin DEm Arcminute of Declination (J2000) (2)
40- 43 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
45- 49 F5.2 mag Vmag ? The V band magnitude
51- 54 F4.2 mag B-V ? The (B-V) color
56- 59 F4.2 mag V-R ? The (V-R) color
61- 64 F4.2 mag V-I ? The (V-I) color
66- 70 F5.2 mag Rmag ? The R_c_ band magnitude
72- 75 F4.2 mag R-I ? The (R_c_-I_c_) color
77- 81 F5.2 mag Jmag ? The Mauna Kea J band magnitude
83- 86 F4.2 mag J-H ? The (J-H) color
88- 91 F4.2 mag H-K ? The (H-K) color
93 A1 --- l_W(Ha) Limit flag on W(Ha) (3)
94- 98 F5.1 0.1nm W(Ha) ? The H{alpha} equivalent width in Angstroems
100-104 A5 --- f_W(Ha) Flag on W(Ha) (4)
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Note (1): Note:
a = Detected proper motion, most likely foreground star.
b = Variability suspected.
f = 218: Possible HH object, see ``d'' in Note (4); probably LkH{alpha}-246.
Note (2): Based on reference stars from the HST Guide Star and USNO-A catalogs.
Note (3): A "<" and a value of 5 in W(Ha) indicates no emission was present
on a detectable continuum.
Note (4): If the continuum was lost in the noise, if there was some
interference by nearby spectra, or if the star fell outside the grism
field, the column is left blank. Other flags are:
em = cases where only the emission line was detectable above the sky
noise, or where emission was detected but the continuum level was
confused by an overlapping spectrum.
abs = line seen in absorption.
: = uncertain measurement.
c = 169: W variable between about 60 and 110{AA}.
d = 182: Possible HH object; H{alpha} in emission as well as a line
near the position of [SII] 6716,6730{AA}; no continuum.
e = 197: W possibly variable between about 5 and 35{AA}.
g = 330: W possibly variable between about 25 and 60{AA}.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [HD2002] ? Star identification number
4- 5 A2 --- n_[HD2002] [ab ] Note on [HD2002] (1)
7- 10 A4 --- Walk Walker number (G1)
12- 15 A4 --- SpType Spectral type
17 A1 --- l_W(Ha) Limit flag on W(Ha)
18- 22 F5.1 0.1nm W(Ha) ? H{alpha} equivalent width
23 A1 --- u_W(Ha) Uncertainty flag on W(Ha)
25- 27 A3 --- n_W(Ha) [abs ] abs: line seen in absorption
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Note (1): the note has the following meaning:
a: Probably foreground: small A_V_
b: Probably foreground: significant proper motion.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Walk Walker variable number (Cl* IC 5146 W VNN)
3 A1 --- n_Walk [abc] Note on Walk (1)
5- 7 I3 --- [HD2002] ? Star identification number
9- 13 F5.2 mag Bmag ? B magnitude or upper value of B magnitude
range (2)
14 A1 --- --- [-]
15- 19 F5.2 mag Bmagl ? Lower value of B magnitude range
21- 25 F5.2 mag Vmag ? V magnitude or upper value of V magnitude
range (2)
26 A1 --- --- [-]
27- 31 F5.2 mag Vmagl ? Lower value of V magnitude range
33- 37 F5.2 mag Rmag ? R_c_ magnitude or upper value of R_c_
magnitude range (2)
38 A1 --- --- [-]
39- 43 F5.2 mag Rmagl ? Lower value of R_c_ magnitude range
45- 49 F5.2 mag Imag ? I_c_ magnitude or upper value of I_c_
magnitude range (2)
50 A1 --- --- [-]
51- 55 F5.2 mag Imagl ? Lower value of I_c_ magnitude range
57 A1 --- l_W(Ha) Limit flag on W(Ha)
58- 60 I3 0.1nm W(Ha) ? H{alpha} equivalent width
61 A1 --- u_W(Ha) Uncertainty flag on W(Ha)
63- 77 A15 --- Rem Remarks
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Note (1): Notes:
a: The star at the position marked for variable 2 on Walker's Fig. 2
has no detectable H{alpha} emission and lies below the main
sequence, so it is not included in Table 2. However,
525=IH{alpha} 176 is about 5" away, so we have assumed that it is
Walker's variable.
b: Lies below the main sequence, so is possibly a background star and
not in Table 1 (or 2) for that reason.
c: Outside the present photometric area.
Note (2): Single magnitudes from Table 1 or 2 are given for stars having
observations at only one epoch.
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Global notes:
Note (G1): Other names:
WNN = IC 5146 NN (Walker, 1959ApJ...130...57W)
LNNN = EM* LkHA NNN (Herbig, 1960ApJ...131..516H)
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History:
From electronic version of the journal
* 10-May-2002: two errors were corrected in table3:
Star 367 = W66 = IC 5146 66 (and not star 3)
Star 504 = L236 = LkHA 236 (and not star 514)
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-Mar-2002