J/MNRAS/446/274     A deep catalogue of classical Be stars   (Raddi+, 2015)
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A deep catalogue of classical Be stars in the direction of the Perseus Arm:
spectral types and interstellar reddenings.
    Raddi R., Drew J.E., Steeghs D., Wright N.J., Drake J.J., Barentsen G.,
    Fabregat J., Sale S.E.
   <Mon. Not. R. Astron. Soc. 446, 274 (2015)>
   =2015MNRAS.446..274R
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ADC_Keywords: Stars, Be ; Photometry, H-alpha ; Photometry, infrared ;
              Spectral types ; Reddening
Keywords: stars: early-type - stars: emission-line, Be - dust, extinction -
          ISM: structure

Abstract:
    We present a catalogue of 247 photometrically and spectroscopically
    confirmed fainter classical Be stars (13<r<16) in the direction of the
    Perseus Arm of the Milky Way (1{deg}<b<+4{deg}, 120{deg}<l<140{deg}).
    The catalogue consists of 181 IPHAS-selected new classical Be stars,
    in addition to 66 objects that we studied in our previous work more
    closely, and three stars identified as classical Be stars in earlier
    work. This study more than doubles the number known in the region.
    Photometry spanning 0.6-5um, spectral types, and interstellar
    reddenings are given for each object. The spectral types were
    determined from low-resolution spectra
    ({lambda}/{Delta}_{lambda}~800-2000), to a precision of 1-3 subtypes.
    The interstellar reddenings are derived from the (r-i) colour, using a
    method that corrects for circumstellar disc emission. The colour
    excesses obtained range from E(B-V)=0.3 up to 1.6 a distribution that
    modestly extends the range reported in the literature for Perseus-Arm
    open clusters. For around half the sample, the reddenings obtained are
    compatible with measures of the total sightline Galactic extinction.
    Many of these are likely to lie well beyond the Perseus Arm.

Description:
    The classical Be stars in the catalogue are found in the strip of the
    Galactic plane, contained within 120{deg}<=l<=140{deg} and
    -1{deg}<=b<=+4{deg}. Their spatial distribution is shown in Fig. 1,
    overplotted on the Schlegel et al. (1998ApJ...500..525S) extinction
    map of the area. As we reported in Paper I (Raddi et al.,
    2013MNRAS.430.2169R), the follow-up spectroscopy targeted H{alpha}
    emitters, identified in IPHAS mainly by Witham et al.
    (2008MNRAS.384.1277W, Cat. J/MNRAS/384/1277).

File Summary:
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 FileName   Lrecl  Records   Explanations
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ReadMe         80        .   This file
phot.dat      133      248   Positions and photometric data
                             (table A1 of the paper)
para.dat      108      247   Spectral types and interstellar reddenings
                             (table B1 of the paper)
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See also:
   II/321 : IPHAS DR2 Source Catalogue (Barentsen+, 2014)

Byte-by-byte Description of file: phot.dat
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   Bytes Format Units   Label     Explanations
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   1-  3  I3    ---     ID        [1/248] Object's sequential number
   5- 23  A19   ---     IPHAS     IPHAS designation (JHHMMSS.ss+DDMMSS.s) (1)
  25- 30  F6.2  deg     GLON      Galactic longitude
  32- 36  F5.2  deg     GLAT      Galactic latitude
  38- 42  F5.2  mag     rmag      IPHAS r magnitude (2)
  44- 47  F4.2  mag     r-i       IPHAS r-i colour index (2)
  49- 52  F4.2  mag     r-Ha      IPHAS r-Ha (2)
  54- 58  F5.2  mag     Jmag      2MASS J magnitude
  60- 63  F4.2  mag   e_Jmag      Error on Jmag
  65- 68  F4.2  mag     J-H       2MASS J-H colour index
  70- 73  F4.2  mag   e_J-H       Error on J-H
  75- 78  F4.2  mag     H-K       2MASS H-K colour index
  80- 83  F4.2  mag   e_H-K       Error on H-K
  85- 89  F5.2  mag     W1mag     ? WISE W1 magnitude
  91- 94  F4.2  mag   e_W1mag     ? Error on W1mag
  96-100  F5.2  mag     W1-W2     ? WISE W1-W2 colour index
 102-105  F4.2  mag   e_W1-W2     ? Error on W1-W2
 108-111  F4.2  mag     i-W1      ? i-W1 colour index
 113-116  F4.2  mag   e_i-W1      ? Error on i-W1
 118-121  F4.2  mag     J-W1      ? J-W1 colour index
 123-126  F4.2  mag   e_J-W1      ? Error on J-W1
     128  A1    ---     S1        [Y/N] has La Palma spectrum (3)
     130  A1    ---     S2        [Y/N] has FLWO-1.5m/FAST spectrum (3)
 132-133  A2    ---   f_ID        [* ] Photometry notes (4)
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Note (1): Sexagesimal, equatorial position-based source name in the form:
 JHHMMSS.ss+DDMMSS.s. The full naming convention for IPHAS sources has the form
  "IPHAS JHHMMSS.ss+DDMMSS.s", where "J" indicates the position is J2000.
  The "IPHAS" prefix is not listed explicitly in the designation column.
Note (2): Typical uncertainties in IPHAS magnitudes and colours are 0.02 and
  0.03mag, respectively.
Note (3): Spectra are available for download at http://www.iphas.org/
Note (4): Notes as follows:
   * = IPHAS photometry for these classical Be stars is not included in DR2,
       because the corresponding fields were D-graded in Barentsen et al.
       (2014MNRAS.444.3230B). Their photometry is to be considered accurate at
       the level of ~10 per cent.
  ** = This object is no more classified as a classical Be star but rather like
       a Herbig Be star, and then is not in para.dat file
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Byte-by-byte Description of file: para.dat
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   Bytes Format Units   Label     Explanations
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   1-  3  I3    ---     ID        [1/248] Object's sequential number
   5- 11  A7    ---     SpT1      Spectral type from La Palma spectra (5)
  13- 14  I2    ---     SN1       [21/81]? Signal-to-noise ratio measured
                                    at 450nm (5)
  16- 22  A7    ---     SpT2      Spectral type from FLWO-1.5m/FAST (6)
  24- 25  I2    ---     SN2       [7/82]? Signal-to-noise ratio measured
                                    at 450nm (6)
  27- 30  F4.2  mag     (r-i)c    Corrected IPHAS (r-i) colour index (7)
  32- 36  F5.2  mag     (r-i)o    Intrinsic (r-i) colour index (8)
  38- 41  F4.2  mag     E(r-i)    E(r-i) colour excess
  43- 46  F4.2  mag   e_E(r-i)    Error on E(r-i)
  48- 50  I3    0.1nm   W(Ha)     [-99/-3] Photometric H{alpha} equivalent width
                                           in Angstrom ({AA})
  52- 55  F4.2  mag     fD        [0/0.33] Disc contribution to the SED at 550nm
  57- 60  F4.2  mag     E(r-i)cs  E(r-i)^cs^: circumstellar colour excess
  62- 65  F4.2  mag     E(r-i)is  E(r-i)^is^: interstellar colour excess
  67- 70  F4.2  mag   e_E(r-i)is  Error on E(r-i)is
  72- 75  F4.2  mag     E(B-V)is  E(B-V)^is^: interstellar reddening
  77- 80  F4.2  mag   e_E(B-V)is  Error on E(B-V)is
  82- 85  F4.2  mag     E(B-V)is1 ? E(B-V)^is^: LS interstellar reddening (9)
  87- 90  F4.2  mag   e_E(B-V)is1 ? Error on E(B-V)is1
  92- 95  F4.2  mag     E(B-V)1   SFD98 sightline asymptotic reddening (10)
  97-101  F5.2  mag     E(B-V)2   RF09 sightline asymptotic reddening (11)
 103-106  F4.2  mag     E(B-V)3   S14 sightline asymptotic reddening (12)
     108  A1    ---   f_ID        [*] Note on photometry (13)
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Note (5): Spectral types and signal-to-noise ratio determined from la Palma
  spectra (Raddi et al., 2013MNRAS.430.2169R)
Note (6): Spectral types and signal-to-noise ratio determined from
  FLWO-1.5m/FAST spectra.
Note (7): (r-i) colour index corrected for H{alpha} emission.
Note (8): Intrinsic (r-i) colours adopted from Table 4 in Raddi et al.
  (2013MNRAS.430.2169R).
Note (9): E(B-V) measured via least-squares fitting method (Raddi et al.,
  2013MNRAS.430.2169R).
Note (10): Asymptotic interstellar reddening from Schlegel et al.
  (1998ApJ...500..525S) multiplied by 0.86, as suggested by Schlafly et al.
  (2010ApJ...725.1175S).
Note (11): Asymptotic interstellar reddening from Rowles & Froebrich
  (2009MNRAS.395.1640R).
Note (12): Asymptotic reddening measured via the 3D extinction maps by Sale
   et al. (2014MNRAS.443.2907S).
Note (13): * = These objects carry a larger photometric uncertainty, because
  their photometry does not meet the quality controls of DR2 (cf. file phot.dat
  and Barentsen et al., 2014MNRAS.444.3230B).
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Acknowledgements:
    Roberto Raddi, r.raddi(at) warwick.ac.uk (University of Warwick)

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(End)                                      Patricia Vannier [CDS]    20-Nov-2014