- ID:
- ivo://CDS.VizieR/VIII/98
- Title:
- 180MHz Murchison Commissioning Survey (MWACS)
- Short Name:
- VIII/98
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Murchison Widefield Array Commissioning Survey (MWACS) is a ~6100deg^2^ 104-196MHz radio sky survey performed with the Murchison Widefield Array during instrument commissioning between 2012 September and 2012 December. The data were taken as meridian drift scans with two different 32-antenna sub-arrays that were available during the commissioning period. The data were combined in the visibility plane before being imaged, and then mosaicked. The survey covers approximately 20.5h<RA<8.5h, -58{deg}<Dec<-14{deg} over three frequency bands centred on 119, 150 and 180MHz. The survey has 3arcmin angular resolution and a typical noise level of 40mJy/beam, with reduced sensitivity near the field boundaries and bright sources. The catalogue consists of flux density and spectral index measurements for 14,110 sources, extracted from the mosaics, 1,247 of which are sub-components of complexes of sources.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/MNRAS/376/1251
- Title:
- 610MHz observations of Spitzer XFLS
- Short Name:
- J/MNRAS/376/1251
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Observations of the Spitzer extragalactic First Look Survey field taken at 610MHz with the Giant Metre-wave Radio Telescope are presented. Seven individual pointings were observed, covering a total area of 4 square degrees with a resolution of 5.8x4.7arcsec^2^, PA=60{deg}. The r.m.s. noise at the centre of the pointings is between 27 and 30uJy before correction for the GMRT primary beam. The techniques used for data reduction and production of a mosaicked image of the region are described, and the final mosaic, along with a catalogue of 3944 sources detected above ~5{sigma} are presented. The survey complements existing radio and infrared data available for this region. For further details of the surveys and data analysis procedures please refer to the published paper.
- ID:
- ivo://CDS.VizieR/J/A+A/376/861
- Title:
- 1420MHz radio continuum survey of the southern sky
- Short Name:
- J/A+A/376/861
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of an absolutely calibrated radio continuum survey of the South Celestial Hemisphere at a frequency of 1420MHz are presented. Contour maps show the area 0h<=RA<=24h for the declination range -90{deg} to -10{deg}. Contour steps (50mK T_B_; 3xrms noise) and angular resolution (HPBW 35.4') of the maps match the already existing Stockert telescope Northern Sky Survey at the same frequency (Reich 1982A&AS...48..219R ; Reich & Reich 1986A&AS...63..205R). We compare flux densities of compact and extended sources with published data from the Parkes 64-m telescope and find excellent agreement in general. The survey maps are sensitive enough to constrain synchrotron and thermal emission components which might influence studies of the cosmic microwave background.
- ID:
- ivo://CDS.VizieR/J/ApJS/155/89
- Title:
- 325MHz radio survey in M31
- Short Name:
- J/ApJS/155/89
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present here the results of a 325MHz radio survey of M31, conducted with the A configuration of the Very Large Array. The survey covered an area of 7.6{deg}^2^, and a total of 405 radio sources between <~6" and 170" in extent were mapped with a resolution of 6" and a 1{sigma} sensitivity of ~0.6mJy/beam. For each source, its morphological class, major axis {theta}_M_, minor axis {theta}_m_, position angle {theta}_PA_, peak flux I, integrated flux density S, spectral index {alpha}, and spectral curvature parameter {phi} were calculated.
- ID:
- ivo://CDS.VizieR/J/ApJS/159/242
- Title:
- 325MHz radio survey in M31. II.
- Short Name:
- J/ApJS/159/242
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have previously presented the results of a 325MHz radio survey of M31 (Cat. <J/ApJS/155/89>, conducted with the A configuration of the Very Large Array. In this survey, a total of 405 radio sources between <~6" and 170" in extent were mapped with a resolution of 6" and a sensitivity of ~0.6mJy/beam. Here we compare the resultant source list and image with other radio, IR, optical, and X-ray observations and catalogs of the region.
- ID:
- ivo://CDS.VizieR/J/ApJ/846/L19
- Title:
- 115-155MHz radio survey of Fermi sources
- Short Name:
- J/ApJ/846/L19
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using LOFAR, we have performed a very-low-frequency (115-155MHz) radio survey for millisecond pulsars (MSPs). The survey targeted 52 unidentified Fermi {gamma}-ray sources. Employing a combination of coherent and incoherent dedispersion, we have mitigated the dispersive effects of the interstellar medium while maintaining sensitivity to fast-spinning pulsars. Toward 3FGLJ1553.1+5437 we have found PSRJ1552+5437, the first MSP to be discovered (through its pulsations) at a radio frequency <200MHz. PSR J1552+5437 is an isolated MSP with a 2.43ms spin period and a dispersion measure of 22.9pc/cm^3^. The pulsar has a very steep radio spectral index ({alpha}-2.8+/-0.4). We obtain a phase-connected timing solution combining the 0.74yr of radio observations with {gamma}-ray photon arrival times covering 7.5yr of Fermi observations. We find that the radio and {gamma}-ray pulse profiles of PSR J1552+5437 appear to be nearly aligned. The very steep spectrum of PSR J1552+5437, along with other recent discoveries, hints at a population of radio MSPs that have been missed in surveys using higher observing frequencies. Detecting such steep spectrum sources is important for mapping the population of MSPs down to the shortest spin periods, understanding their emission in comparison to slow pulsars, and quantifying the prospects for future surveys with low-frequency radio telescopes like SKA-Low and its precursors.
- ID:
- ivo://CDS.VizieR/VIII/6
- Title:
- 1400-MHz Sky Survey, Maps Covering Dec -5 to +82
- Short Name:
- VIII/6
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The survey contains 144 maps that cover the declination zone -5 to +82 degrees from the National Radio Astronomy Observatory (NRAO) 1400-MHz survey. The observations were made during 1983 April 2-21, and in October 1983, with the rebuilt four-feed receiver on the NRAO 91-m transit telescope in Green Bank. Its resolution is 12.7x11.1 arcmin. These maps with a pixel size of 2x2arcmin contain 3000 sources per sr stronger than 0.15 Jy, which is six times the rms noise. They are available in the Flexible Image Transport System (FITS) standard (in the "maps" subdirectory) and can be studied with standard Astronomical Image Processing System (AIPS) display and analysis programs.
1118. 102.5MHz Survey
- ID:
- ivo://CDS.VizieR/J/AZh/77/21
- Title:
- 102.5MHz Survey
- Short Name:
- J/AZh/77/21
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of observations on the Large Phased Array of the Lebedev Physical Institute made as part of a survey of northern sky at 102.5 MHz are reported. Survey source lists for declination ranges 27.5-33.5 deg. and 67.5-70.5 deg. are given, together with their coordinates, flux densities and identifications with 4C objects. In total, there are 920 sources with flux densities S(102.5)>=3.0 Jy in the two zones, which cover over 0.73 steradians.
- ID:
- ivo://nasa.heasarc/skyview/pmn
- Title:
- 4850 MHz Survey - GB6/PMN
- Short Name:
- PMN
- Date:
- 25 Apr 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The 4850MHz data is a combination of data from three different surveys: Parkes-MIT-NRAO (PMN) Southern (-88&#176;; to -37&#176;; declination) and tropical surveys (-29&#176;; to -9&#176;; declination, and (86+87) Green Bank survey (0&#176;; to +75&#176;; declination). The data contains gaps between -27&#176;; to -39&#176;;, -9&#176;; to 0&#176;;, and +77&#176;; to +90&#176;; declination. The 4850MHz survey data were obtained by tape from J.J. Condon and are comprised of 576 images and are used by permission. Full information pertaining to these surveys are found in the references.<P> Provenance: NRAO, generated by J.J. Condon, J.J. Broderick and G.A. Seielstad, Douglas, K., and Gregory, P.C.. This is a service of NASA HEASARC.
- ID:
- ivo://CDS.VizieR/VIII/29A
- Title:
- 1400-MHz Survey of 1478 Abell Clusters of Galaxies
- Short Name:
- VIII/29A
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog contains observations of Abell clusters of galaxies which were obtained with the Green Bank 91-m telescope at 1400 MHz with an angular resolution of 10'x11' (RAxDEC). This catalog extends the sample of clusters originally published in Owen (1974AJ.....79..427O). The primary goals of this survey were to observe all Abell (1958ApJS....3..211A, Cat. VII/4) clusters with m10 (magnitude of the tenth brightest galaxy in the cluster) less than or equal to 17.0 and declinations north of -19 degrees, to observe all clusters with richness>=3 regardless of m10, and to obtain observations of a representative sample of the rest of the catalog (m10>=17.0; richness<=2). The abelclus.dat file contains ALL 957 detected sources (also beyond 0.5 corrected Abell radii). It contains 525 sources within 0.5 corrected Abell radii, while the published table1.dat file contains 487 entries corresponding to 485 distinct sources (in 442 clusters). The catalog entries contains the flux density at 1400 MHz, the Abell cluster number, richness class, distance class, m10, redshift estimate (z), corrected Abell cluster radius, right ascension (B1950), declination (B1950), deconvolved major and minor source axis lengths, position angle, and distance of the source from the cluster center.
