J/ApJS/222/11 Hubble Tarantula Treasury Project (HTTP). III. (Sabbi+, 2016)
Hubble Tarantula Treasury Project.
III. Photometric catalog and resulting constraints on the progression of
star formation in the 30 Doradus region.
Sabbi E., Lennon D.J., Anderson J., Cignoni M., van der Marel R.P.,
Zaritsky D., De Marchi G., Panagia N., Gouliermis D.A., Grebel E.K.,
Gallagher III J.S., Smith L.J., Sana H., Aloisi A., Tosi M., Evans C.J.,
Arab H., Boyer M., de Mink S.E., Gordon K., Koekemoer A.M., Larsen S.S.,
Ryon J.E., Zeidler P.
<Astrophys. J. Suppl. Ser., 222, 11 (2016)>
=2016ApJS..222...11S 2016ApJS..222...11S (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, HST ; H II regions ; Stars, faint
Keywords: catalogs; galaxies: star clusters: individual: 30 Doradus;
Magellanic Clouds; stars: formation; stars: imaging;
stars: pre-main sequence
Abstract:
We present and describe the astro-photometric catalog of more than
800000 sources found in the Hubble Tarantula Treasury Project (HTTP).
HTTP is a Hubble Space Telescope Treasury program designed to image
the entire 30 Doradus region down to the sub-solar (∼0.5M☉) mass
regime using the Wide Field Camera 3 and the Advanced Camera for
Surveys. We observed 30 Doradus in the near-ultraviolet (F275W,
F336W), optical (F555W, F658N, F775W), and near-infrared (F110W,
F160W) wavelengths. The stellar photometry was measured using
point-spread function fitting across all bands simultaneously. The
relative astrometric accuracy of the catalog is 0.4mas. The
astro-photometric catalog, results from artificial star experiments,
and the mosaics for all the filters are available for download.
Color-magnitude diagrams are presented showing the spatial
distributions and ages of stars within 30 Dor as well as in the
surrounding fields. HTTP provides the first rich and statistically
significant sample of intermediate- and low-mass pre-main sequence
candidates and allows us to trace how star formation has been
developing through the region. The depth and high spatial resolution
of our analysis highlight the dual role of stellar feedback in
quenching and triggering star formation on the giant HII region scale.
Our results are consistent with stellar sub-clustering in a partially
filled gaseous nebula that is offset toward our side of the Large
Magellanic Cloud.
Description:
Hubble Tarantula Treasury Project (HTTP; HST 12939, PI Elena Sabbi +
HST 12499, PI Danny Lennon) was awarded 60 orbits of HST time in cycle
20 to survey the entire Tarantula Nebula (30 Doradus), using both the
UVIS and the IR channels of the Wide Field Camera 3 (WFC3), and, in
parallel, the Wide Field Channel (WFC) of the Advanced Camera for
Surveys (ACS). See log of the observations (from 2011 Oct 03 to 2013
Sep 17) in table 1.
When using data from HTTP, please cite the following papers:
Sabbi et al. 2013AJ....146...53S 2013AJ....146...53S, Sabbi et al. 2016, J/ApJS/222/11
(this paper), and include the following acknowledgment: "This work
is based on observations taken by the Hubble Tarantula Treasury
Project with the NASA/ESA HST, which is operated by the Association of
Universities for Research in Astronomy, Inc., under NASA contract
NAS5-26555."
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 212 Log of the observations
photcat.dat 291 822204 Photometric catalog
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/AJ/148/124 : Herschel key program Heritage (Seale+, 2014)
J/A+A/564/L7 : VLT-FLAMES Tarantula Survey: VFTS 822 (Kalari+, 2014)
J/A+A/558/A134 : VLT-FLAMES Tarantula Survey. 30 Dor stars (Doran+, 2013)
J/A+A/554/A33 : VMC Survey. VII. 30 Doradus reddening map (Tatton+, 2013)
J/A+A/530/A108 : VLT-FLAMES Tarantula Survey (Evans+, 2011)
J/ApJ/707/1347 : HST F160W photometry in RMC 136 (Andersen+, 2009)
J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)
J/AJ/128/1606 : Magellanic Clouds Photometric Survey: LMC (Zaritsky+, 2004)
J/ApJ/448/179 : HST photometry in R136 (Hunter+ 1995)
http://doi.org/10.17909/T9RP4V : Hubble Tarantula Treasury Project home page
http://www.stsci.edu/hst : HST STScI home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Set Data set
11 A1 --- f_Set [*] Quality flag on Set (1)
13- 14 I2 h RAh [5] Hour of right ascension (J2000)
16- 17 I2 min RAm [36/39] Minute of right ascension (J2000)
19- 24 F6.3 s RAs Second of right ascension (J2000)
26 A1 --- DE- [-] Sign of declination (J2000)
27- 28 I2 deg DEd [68/69] Degree of declination (J2000)
30- 31 I2 arcmin DEm Arcminute of declination (J2000)
33- 37 F5.2 arcsec DEs Arcsecond of declination (J2000)
39- 49 A11 "Y/M/D" Obs.date UT observation date
51- 58 A8 "h:m:s" Obs.time UT observation start time
60- 67 F8.3 s Exp [32/2639] Exposure time
69 I1 --- Np [1/4] Number of pointings
71- 79 A9 --- Inst Instrument (ACS/WFC, WFC3/IR or WFC3/UVIS)
81- 85 A5 --- Filt Filter (F110W, F160W, F275W, F336W, F555W,
F658N or F775W)
87- 95 F9.3 --- lambda0 [2706.9/15369.2] Central wavelength
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Note (1): Items marked with * have been discarded because they have been
degraded by the loss of the guide stars by the Fine Guidance Sensors.
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Byte-by-byte Description of file: photcat.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [SABBI] Catalog identifier
7- 26 A20 --- HTTP Identifier (HHMMSS.sss+DDMMSS.ss; J2000)
28- 33 F6.3 mag F275mag [9.7/37.1]?=99.999 HST WFC3/UVIS F275W
magnitude (1)
35- 46 F12.3 mag e_F275mag [0/32816762] F275mag uncertainty
48- 52 F5.3 --- q_F275mag [0/1] F275mag quality of the PSF fitting Qfit
54 I1 --- f_F275mag [0/7] Quality flag (best=1) on F275mag (2)
56- 61 F6.3 mag F336mag [10/37.9]?=99.999 HST WFC3/UVIS F336W
magnitude (1)
63- 74 F12.3 mag e_F336mag [0/27829599] F336mag uncertainty
76- 80 F5.3 --- q_F336mag [0/1] F336mag quality of the PSF fitting Qfit
82 I1 --- f_F336mag [0/7] Quality flag (best=1) on F336mag (2)
84- 89 F6.3 mag F555mag [10.2/39]?=99.999 HST ACS/WFC F555W
magnitude (1)
91-103 F13.3 mag e_F555mag [0/631655999] F555mag uncertainty
105-109 F5.3 --- q_F555mag [0/1] F555mag quality of the PSF fitting Qfit
111 I1 --- f_F555mag [0/7] Quality flag (best=1) on F555mag (2)
113-118 F6.3 mag F658mag [14.4/36.9]?=99.999 HST ACS/WFC F658N
magnitude (1)
120-131 F12.3 mag e_F658mag [0/52100899] F658mag uncertainty
133-137 F5.3 --- q_F658mag [0/1] F658mag quality of the PSF fitting Qfit
139 I1 --- f_F658mag [1/7] Quality flag (best=1) on F658mag (2)
141-146 F6.3 mag F775Amag [9.8/37.7]?=99.999 HST ACS/WFC F775W magnitude
148-159 F12.3 mag e_F775Amag [0/24433999] F775Amag uncertainty
161-165 F5.3 --- q_F775Amag [0/1] F775Amag quality of the PSF fitting Qfit
167 I1 --- f_F775Amag [0/7] Quality flag (best=1) on F775Amag (2)
169-174 F6.3 mag F775Umag [9.7/38.8]?=99.999 HST WFC3/UVIS F775U
magnitude (1)
176-186 F11.3 mag e_F775Umag [0/2869299] F775Umag uncertainty
188-192 F5.3 --- q_F775Umag [0/1] F775Umag quality of the PSF fitting Qfit
194 I1 --- f_F775Umag [0/7] Quality flag (best=1) on F775Umag (2)
196-201 F6.3 mag F110mag [13.1/33.5]?=99.999 HST WFC3/IR F110W
magnitude (1)
203-214 F12.3 mag e_F110mag [0/61292699] F110mag uncertainty
216-220 F5.3 --- q_F110mag [0/1] F110mag quality of the PSF fitting Qfit
222 I1 --- f_F110mag [1/7] Quality flag (best=1) on F110mag (2)
224-229 F6.3 mag F160mag [11.6/32.2]?=99.999 HST WFC3/IR F160W
magnitude (1)
231-242 F12.3 mag e_F160mag [0/32275499] F160mag uncertainty
244-248 F5.3 --- q_F160mag [0/1] F160mag quality of the PSF fitting Qfit
250 I1 --- f_F160mag [1/7] Quality flag (best=1) on F160mag (2)
252-260 F9.3 pix X [3470.7/31297] X coordinate (pixels)
262-270 F9.3 pix Y [3425.9/25737] Y coordinate (pixels)
272-280 F9.6 deg RAdeg [84/85.1] Right ascension (J2000)
282-291 F10.6 deg DEdeg [-69.3/-68.9] Declination (J2000)
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Note (1): Stars too faint to be detected in one filter (negative flux) or
that fall outside the filter field of view have been assigned a
magnitude of 99.999.
Note (2): We assigned to each source in each filter a quality flag ffilter
ranging from 1 to 7 as follows:
7 = Stars that cannot be detected in one filter because they are outside
the filter coverage
6 = Stars that are too faint to be measured
5 = Sources detected in just one exposure without photometric error. We
assigned to these stars the most probable error for their magnitude.
Poor quality of the PSF fitting (Qfit≤0.75)
4 = Objects with photometric errors larger than 0.25 and poor quality
of the PSF fitting
3 = Sources with photometric errors smaller than 0.25, but with a poor
fit of the PSF
2 = Sources detected in just one exposure without photometric error. We
assigned to these stars the most probable error for their magnitude.
But good quality of the PSF fitting (Qfit>0.75).
1 = Sources that have been well fitted by our PSF model and are likely
stars. Their luminosities have been measured in more than one
flt/flc image.
See section 4 for furter explanations.
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History:
From electronic version of the journal for table 1.
Photometric catalog downloaded at:
http://archive.stsci.edu/prepds/30dor/Preview/observations.html
(End) Emmanuelle Perret [CDS] 08-Feb-2016