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J/AJ/136/2136    HST/ACS Atlas of Great Orion Nebula proplyds     (Ricci+, 2008)
The Hubble Space Telescope/Advanced Camera for Surveys atlas of protoplanetary
disks in the Great Orion Nebula.
    Ricci L., Robberto M., Soderblom D.R.
   <Astron. J., 136, 2136-2151 (2008)>
   =2008AJ....136.2136R
ADC_Keywords: H II regions ; Nebulae ; Cross identifications ; Atlases

Keywords: ISM: individual (Orion Nebula) - ISM: jets and outflows -
          planetary systems: protoplanetary disks - reflection nebulae -
          stars: formation - stars: pre-main sequence

Abstract:
    We present the atlas of protoplanetary disks in the Orion Nebula based
    on the Wide Field Channel of the Advanced Camera for Surveys (ACS/WFC)
    images obtained for the Hubble Space Telescope (HST) Treasury Program
    on the Orion Nebula Cluster. The observations have been carried out in
    five photometric filters nearly equivalent to the standard B, V,
    Hα, I, and z passbands. Our master catalog lists 178 externally
    ionized protoplanetary disks (proplyds), 28 disks seen only in
    absorption against the bright nebular background (silhouette disks),
    eight disks seen only as dark lanes at the midplane of extended polar
    emission (bipolar nebulae or reflection nebulae), and five sources
    showing jet emission with no evidence of either external ionized gas
    emission or dark silhouette disks.

Description:
    The images have been extracted from the large dataset (520 images) of
    ACS/WFC observations executed between 2004 November and 2005 April.
    The ACS/WFC survey has covered an area of about 450arcmin2, centered
    about 4' southwest of the Trapezium cluster.

    In data subdirectory, every file name has the structure:
    object name+"_"+filter+".fits", where object name is the name of the
    object as reported in the paper and filter is the HST/ACS photometric
    filter of the image. These images are astrometrically correct, i.e.
    field distortion has been removed. The fits headers contain the
    correct astrometric information (WCS) and return absolutely calibrated
    coordinates.

    In these drizzled images the pixel values are in counts per second,
    and an estimate in magnitudes of the photometry of a source can be
    directly extracted by m=-2.5Log(F)+ZP, where m is the magnitude of the
    source in the passband of interest, F is the observed flux of the
    source in counts per second in that passband, and ZP is the passband
    zero-point magnitude in a certain photometric system. In the paper,
    Table 2 lists the zero-point magnitudes derived by the Photometric
    Calibration of the HST/ACS camera (Sirianni et al.,
    2005PASP..117.1049S) in the VEGAMAG, ABMAG and STMAG standard
    photometric systems for the filters used by our survey.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        95      219   Circumstellar disks from the HST/ACS
                              Treasury Program
list.dat          31     1335   List of images in "data" subdirectory
data/*             0     1335   Images of sources in 5 HST filters


See also:
         II/246   : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
   J/AJ/111/846   :  Orion HST survey (O'Dell+ 1996)
   J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Object identification (NNNN-NNNN) (G1)
      10  I1    h       RAh       Hour of Right Ascension (J2000)
  12- 13  I2    min     RAm       Minute of Right Ascension (J2000)
  15- 19  F5.2  s       RAs       Second of Right Ascension (J2000)
      21  A1    ---     DE-       Sign of the Declination (J2000)
      22  I1    deg     DEd       Degree of Declination (J2000)
  24- 25  I2    arcmin  DEm       Arcminute of Declination (J2000)
  27- 31  F5.2  arcsec  DEs       Arcsecond of Declination (J2000)
  33- 40  A8    ---     [OW94]    O'Dell catalogs identification (1)
  42- 49  A8    ---    [BOM2000]  Bally et al. (2000AJ....119.2919B)/Smith et
                                   al. (2005AJ....129..382S) identification
  51- 53  I3    ---     JW        ? ID in Jones & Walker (1988AJ.....95.1755J)
  55- 57  I3    ---     PSH       ? ID in Prosser et al. (1994ApJ...421..517P)
  59- 62  I4    ---     [AD95]    ? ID in Ali & DePoy (1995AJ....109..709A)
  64- 80  A17   ---     2MASS     ID in 2MASS (Cutri et al. 2003, Cat. II/246)
  82- 85  I4    ---     COUP      ? ID in COUP (Getman et al. 2005,
                                    Cat. J/ApJS/160/319)
  87- 88  A2    ---     Type      Source type (2)
  90- 95  A6    ---     Note      Additional note(s) (3)

Note (1): O'Dell & Wen 1994ApJ...436..194O, O'Dell & Wong 1996,
     Cat. J/AJ/111/846, and O'Dell 2001AJ....122.2662O.
Note (2): Source type as follows:
   i = ionized disk seen in emission
   d = dark disk seen only in silhouette
  rn = reflection nebulae with no external ionized gas emission
   j = jet emission with no evidence of neither ionized disk nor silhouette disk
Note (3): Additional notes as follows:
   J = jet
  RN = reflection nebula
  EO = disk seen nearly edge-on
  FO = disk seen nearly face-on
   B = binary system


Byte-by-byte Description of file: list.dat

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Object identification (NNNN-NNNN) (G1)
  11- 31  A21   ---     FileName  Name of the image in subdirectory data


Global notes:

Note (G1): Sources identified as <[RRS2008] NNNN-NNNN> in Simbad:
   * NNNN-NNN  : MSSs-MSS   (position: 5 3M SS.s -5 2M SS)
   * NNN-NNN   : SSs-MSS    (position: 5 35 SS.s -5 2M SS)
   * NNN-NNNN  : SSs-MMSS   (position: 5 35 SS.s -5 MM SS)
   * NNNN-NNNN : MSSs-MMSS  (position: 5 3M SS.s -5 MM SS)


History:
    From electronic version of the journal
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    20-May-2011