J/ApJS/184/152 Deep optical photometry in M31 (Brown+, 2009)
Deep optical photometry of six fields in the Andromeda galaxy.
Brown T.M., Smith E., Ferguson H.C., Guhathakurta P., Kalirai J.S.,
Kimble R.A., Renzini A., Rich R.M., Sweigart A.V., Vandenberg D.A.
<Astrophys. J. Suppl. Ser., 184, 152-157 (2009)>
=2009ApJS..184..152B 2009ApJS..184..152B
ADC_Keywords: Photometry, HST ; Galaxies, nearby
Keywords: galaxies: evolution - galaxies: individual (M31)
galaxies: stellar content
Abstract:
Using the Advanced Camera for Surveys on the Hubble Space Telescope,
we have obtained deep optical images reaching well below the oldest
main-sequence turnoff in six fields of the Andromeda Galaxy. The
fields fall at four positions on the southeast minor axis, one
position in the giant stellar stream, and one position on the
northeast major axis. These data were obtained as part of three large
observing programs designed to probe the star formation history of the
stellar population in various structures of the galaxy. In this paper,
we present the images, catalogs, and artificial star tests for these
observing programs as a supplement to the analyses published
previously. These high-level science products are also archived at the
Multimission Archive at the Space Telescope Science Institute.
Description:
Images were obtained using the Wide Field Camera on the ACS, in the
F606W (broad V) and F814W (I) filters. The characteristics of the six
fields observed are summarized in Table 1.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 90 6 Characteristics of M31 Fields
table2.dat 68 189129 Catalog for halo11 field
table3.dat 68 99790 Catalog for stream field
table4.dat 68 150734 Catalog for disk field
table5.dat 68 12579 Catalog for halo21 field
table6.dat 68 4624 Catalog for halo35a field
table7.dat 68 3967 Catalog for halo35b field
--------------------------------------------------------------------------------
See also:
J/AJ/109/2480 : VI photometry of late-type stars in M31. I. (Brewer+ 1995)
J/AJ/122/1383 : DIRECT BVI photometry in M31 (Mochejska+, 2001)
J/AJ/127/2738 : ACS VI photometry of M31 halo RR Lyrea (Brown+, 2004)
J/A+A/473/429 : HST VI photometry of Bol 514 in M31 (Federici+, 2007)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Field Field name
9- 16 A8 --- Prog Program number
18- 19 I2 h RAh Hour of right ascension (J2000)
21- 22 I2 min RAm Minute of right ascension (J2000)
24- 27 F4.1 s RAs Second of right ascension (J2000)
29 A1 --- DE- Sign of declination (J2000)
30- 31 I2 deg DEd Degree of declination (J2000)
33- 34 I2 arcmin DEm Arcminute of declination (J2000)
36- 37 I2 arcsec DEs Arcsecond of declination (J2000)
39- 43 F5.1 ks tF606W The F606W filter exposure time
45- 49 F5.1 ks tF814W The F814W filter exposure time
51- 60 A10 "YYYY/MM/DD" Date1 Beginning date of observation
62- 71 A10 "YYYY/MM/DD" Date2 Ending date of observation
73- 82 A10 ---- table Corresponding table name (filename)
85- 90 I6 --- N Number of sources found in field
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[234567].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 pix Xpix The x-coordinate (1-indexed)
9- 15 F7.2 pix Ypix The y-coordinate (1-indexed)
17- 18 I2 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 27 F5.2 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000)
44- 48 F5.2 mag F606W The F606W filter magnitude
50- 54 F5.2 mag e_F606W Error in F606Wmag
58- 62 F5.2 mag F814W The F814W filter magnitude
64- 68 F5.2 mag e_F814W Error in F814Wmag
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Feb-2010