We present a catalog of 1439 young stellar objects (YSOs) spanning the 1.42deg^2^ field surveyed by the Chandra Carina Complex Project (CCCP), which includes the major ionizing clusters and the most active sites of ongoing star formation within the Great Nebula in Carina. Candidate YSOs were identified via infrared (IR) excess emission from dusty circumstellar disks and envelopes, using data from the Spitzer Space Telescope (the Vela-Carina survey) and the Two-Micron All Sky Survey. We model the 1-24um IR spectral energy distributions of the YSOs to constrain physical properties. Our Pan-Carina YSO Catalog (PCYC) is dominated by intermediate-mass (2M_{sun}_<m<~10M_{sun}_) objects with disks, including Herbig Ae/Be stars and their less evolved progenitors. The PCYC provides a valuable complementary data set to the CCCP X-ray source catalogs, identifying 1029 YSOs in Carina with no X-ray detection. We also catalog 410 YSOs with X-ray counterparts, including 62 candidate protostars. Extrapolating over the stellar initial mass function scaled to the PCYC population, we predict a total population of >2x10^4^ YSOs and a present-day star formation rate (SFR) of >0.008M_{sun}_/yr. The global SFR in the Carina Nebula, averaged over the past ~5Myr, has been approximately constant.
We carry out a multi-wavelength study of individual galaxies detected by the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) and identified at other wavelengths, using data spanning the radio to the ultraviolet (UV). We develop a Monte Carlo method to account for flux boosting, source blending, and correlations among bands, which we use to derive deboosted far-infrared (FIR) luminosities for our sample. We estimate total star-formation rates (SFRs) for BLAST counterparts with z<=0.9 by combining their FIR and UV luminosities. We assess that about 20% of the galaxies in our sample show indication of a type 1 active galactic nucleus, but their submillimeter emission is mainly due to star formation in the host galaxy. We compute stellar masses for a subset of 92 BLAST counterparts; these are relatively massive objects, with a median mass of ~10^11^M_{sun}_, which seem to link the 24um and Submillimetre Common-User Bolometer Array (SCUBA) populations, in terms of both stellar mass and star formation activity.
We provide AAVSO Photometric All-Sky Survey (APASS) photometry in the Landolt BV and Sloan g'r'i' bands for all 425743 stars included in the fourth RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as the error of the mean of data obtained and separately calibrated over a median of four distinct observing epochs and distributed between 2009 and 2013, is 0.013, 0.012, 0.012, 0.014, and 0.021mag for the B, V, g', r', and i' bands, respectively. The equally high external accuracy of APASS photometry has been verified on secondary Landolt and Sloan photometric standard stars not involved in the APASS calibration process and on a large body of literature data on field and cluster stars, confirming the absence of offsets and trends. Compared with the Carlsberg Meridian Catalog (CMC-15), APASS astrometry of RAVE stars is accurate to a median value of 0.098arcsec. Brightness distribution functions for the RAVE stars have been derived in all bands. APASS photometry of RAVE stars, augmented by 2MASS JHK infrared data, has been {chi}^2^ fitted to a densely populated synthetic photometric library designed to widely explore temperature, surface gravity, metallicity, and reddening. Resulting T_eff_ and E_B-V_, computed over a range of options, are provided and discussed, and will be kept updated in response to future APASS and RAVE data releases. In the process, we find that the reddening caused by a homogeneous slab of dust, extending for 140pc on either side of the Galactic plane and responsible for E_B-V_^poles^=0.036+/-0.002 at the Galactic poles, is a suitable approximation of the actual reddening encountered at Galactic latitudes|b|>=25{deg}.
During a search for RR Lyr variable stars candidate members of the Aquarius stream, which led to the discovery of 71 such objects, we also discovered an additional 180 variables which are presented in this paper. Of them, 141 were previously reported as variables and 39 are brand new. For all 180 objects, we provide: our epoch photometry, accurate positions, mean magnitude and amplitude of variation in Landolt B,V and Sloan g, r, i bands, cross-identification with WISE, 2MASS and GALEX surveys, accurate BVRCICgri photometric sequences and finding charts identifying the variable and the stars of the photometric sequence provided to support follow-up observations. We carried out a Fourier search on all 39 new variables and found periods for 11 of them.
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This data release includes the catalogue and image
observed by Apertif covering 26.5 square degree region in the Boötes
constellation at 1.4 GHz. The image is a mosaic of 187 Apertif images
from 8 different survey observations performed between April 2019 and
November 2021. It has an angular resolution of 27×11.5 arcseconds and
a median background noise of 40 μJy/beam. From this mosaic, 8994
sources were extracted and the catalogue is complete down to the 0.3
mJy level. This service queries the source catalogue of the Boötes
field.
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This data release includes the catalogue and image
observed by Apertif covering 26.5 square degree region in the Boötes
constellation at 1.4 GHz. The image is a mosaic of 187 Apertif images
from 8 different survey observations performed between April 2019 and
November 2021. It has an angular resolution of 27×11.5 arcseconds and
a median background noise of 40 μJy/beam. From this mosaic, 8994
sources were extracted and the catalogue is complete down to the 0.3
mJy level. This service queries the mosaic image of the Boötes field.
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This first data release includes observations in the
first year of survey operations, from 1 July 2019 through 30 June
2020. The data release includes all raw observational data for a total
of 221 observations of 160 independent target fields, covering
approximately one thousand square degrees of sky. A subset of
processed data products, meeting specified quality assessment criteria
as outlined in Adams et al. (2022), are also released. Images and
cubes are released on a per beam basis, and 3374 beams (of 7640
considered) are included in this data release. The processed data
products are only available for the upper 150 MHz of the band over the
range 1280–1430 MHz. The first 12.5 MHz of data are flagged due to
persistent RFI resulting in a nominal bandwidth of 137.5 MHz and
central frequency of 1361.25 MHz. The data products are not
primary-beam corrected, however the primary-beam images are provided
separately that may be used for mosaicking or for correction of
individual images. This service queries the continuum images from the
first data release of Apertif. Multi-frequency synthesis (mfs) Stokes
I images are produced over the full frequency range (1292.5– 1430 MHz)
and saved as fits files for each beam. The size of the continuum
images is 3.4 deg × 3.4 deg (3073 × 3073 pixels, with 4''/pixel). The
median noise in the continuum images is 41.4 uJy/beam and the median
angular resolution is 11.6''/sin(declination). A companion VO table
provides a continuum source catalog based on all continuum images
contained in this data release and is described in Kutkin et al.
(2022) (see
https://vo.astron.nl/apertif_dr1/q/apertif_dr1_catalogue/form).
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This first data release includes observations in the
first year of survey operations, from 1 July 2019 through 30 June
2020. The data release includes all raw observational data for a total
of 221 observations of 160 independent target fields, covering
approximately one thousand square degrees of sky. A subset of
processed data products, meeting specified quality assessment criteria
as outlined in Adams et al. (2022), are also released. Images and
cubes are released on a per beam basis, and 3374 beams (of 7640
considered) are included in this data release. The processed data
products are only available for the upper 150 MHz of the band over the
range 1280–1430 MHz. The first 12.5 MHz of data are flagged due to
persistent RFI resulting in a nominal bandwidth of 137.5 MHz and
central frequency of 1361.25 MHz. The data products are not
primary-beam corrected, however the primary-beam images are provided
separately that may be used for mosaicking or for correction of
individual images. This service queries the calibrated visibility
measurement sets. The calibrated visibility data, with
cross-calibration and self-calibration solutions applied, are
currently stored as an intermediate data product at full time and
spectral resolution. These are stored on tape with the raw data and
are not immediately available for download. The data release
documentation should be consulted for up-to-date information on how to
access the data.
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This first data release includes observations in the
first year of survey operations, from 1 July 2019 through 30 June
2020. The data release includes all raw observational data for a total
of 221 observations of 160 independent target fields, covering
approximately one thousand square degrees of sky. A subset of
processed data products, meeting specified quality assessment criteria
as outlined in Adams et al. (2022), are also released. Images and
cubes are released on a per beam basis, and 3374 beams (of 7640
considered) are included in this data release. The processed data
products are only available for the upper 150 MHz of the band over the
range 1280–1430 MHz. The first 12.5 MHz of data are flagged due to
persistent RFI resulting in a nominal bandwidth of 137.5 MHz and
central frequency of 1361.25 MHz. The data products are not
primary-beam corrected, however the primary-beam images are provided
separately that may be used for mosaicking or for correction of
individual images. The raw visibility data are provided as separate
collections for the survey fields, flux calibrator and polarization
calibrator observations. The tables can be joined to identify the
associated calibrators for a target observation. This service queries
the raw visibilities for the survey fields. These are stored on tape
and are not immediately available for download. The data release
documentation should be consulted for up-to-date information on how to
access the data.
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. This first data release includes observations in the
first year of survey operations, from 1 July 2019 through 30 June
2020. The data release includes all raw observational data for a total
of 221 observations of 160 independent target fields, covering
approximately one thousand square degrees of sky. A subset of
processed data products, meeting specified quality assessment criteria
as outlined in Adams et al. (2022), are also released. Images and
cubes are released on a per beam basis, and 3374 beams (of 7640
considered) are included in this data release. The processed data
products are only available for the upper 150 MHz of the band over the
range 1280–1430 MHz. The first 12.5 MHz of data are flagged due to
persistent RFI resulting in a nominal bandwidth of 137.5 MHz and
central frequency of 1361.25 MHz. The data products are not
primary-beam corrected, however the primary-beam images are provided
separately that may be used for mosaicking or for correction of
individual images. The raw visibility data are provided as separate
collections for the survey fields, flux calibrator and polarization
calibrator observations. The tables can be joined to identify the
associated calibrators for a target observation. This service queries
the raw visibilities for the flux calibrator. These are stored on tape
and are not immediately available for download. The data release
documentation should be consulted for up-to-date information on how to
access the data.
