« Previous |
1 - 10 of 94
|
Next »
Number of results to display per page
Search Results
- ID:
- ivo://astron.nl/lotss_dr2/q/query_mosaics
- Title:
- LoTSS-DR2 mosaics
- Short Name:
- "Mosaics"
- Date:
- 28 Sep 2023 14:12:45
- Publisher:
- ASTRON
- Description:
- In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset. This service queries the Stokes I continuum mosaic images.
- ID:
- ivo://irsa.ipac/Spitzer/Images/SMC-Last
- Title:
- Spitzer's Last Look at the Small Magellanic Cloud
- Short Name:
- SMC-Last
- Date:
- 30 Aug 2023 22:46:07
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- SMC-Last (Program ID number 13096) built on the legacy of SAGE-SMC by adding two more epochs at 3.6 and 4.5 microns covering the entire 30 square degree footprint of the SAGE-SMC survey in late 2017 and early 2018. This program, when combined with the previous surveys, provides a minimum of four epochs at 3.6 and 4.5 microns creating a temporal baseline of over 9 yr covering the entire SMC and its surroundings. Up to nine epochs are available in the core of the SMC spanning a period of over 12 yr.
- ID:
- ivo://irsa.ipac/Spitzer/Images/GLIMPSE
- Title:
- Galactic Legacy Infrared Midplane Survey Extraordinaire
- Short Name:
- GLIMPSE
- Date:
- 24 Aug 2023 01:00:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIMPSE) program covered the Galactic plane with the Spitzer IRAC instrument. GLIMPSEI covered 220 sq. degrees at |l|=10d-65d and b=-1d - +1d. GLIMPSEII covered the Galactic Center, l=-10d - +10d. GLIMPSE3D added vertical extensions, typically to |b|<+3d. GLIMPSE360 covered the outer Galaxy (l=65d-265d) with IRAC 3.6 micron and 4.5 micron imaging. The Vela-Carina program covered l=255d-295d.
- ID:
- ivo://wfau.roe.ac.uk/uhs-siap
- Title:
- UHS SIAP Service
- Short Name:
- UHS SIAP
- Date:
- 14 Jul 2023 11:31:11
- Publisher:
- WFAU, Institute for Astronomy, University of Edinburgh
- Description:
- Simple image access to all images from DR2 of the UKIRT Hemisphere Survey.
- ID:
- ivo://irsa.ipac/Spitzer/Images/DeepDrill
- Title:
- Spitzer Survey of Deep Drilling Fields
- Short Name:
- DeepDrill
- Date:
- 23 May 2023 23:00:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will observe several Deep Drilling Fields (DDFs) to a greater depth and with a more rapid cadence than the main survey. The "DeepDrill" survey (Program ID 11086, P.I. Lacy) used the Spitzer Space Telescope Infrared Array Camera (IRAC) to observe three of the four currently defined DDFs in two bands, centered on 3.6 um and 4.5 um. These observations expand the area which was covered by an earlier set of observations in these three fields by the Spitzer Extragalactic Representative Volume Survey (SERVS). The combined DeepDrill and SERVS data cover the footprints of the LSST DDFs in the Extended Chandra Deep Field-South field (ECDFS), the ELAIS-S1 field (ES1), and the XMM-Large-Scale Structure Survey field (XMM-LSS).
- ID:
- ivo://irsa.ipac/Bolocam/Images/Bolocam_LH
- Title:
- Bolocam Lockman Hole Map
- Short Name:
- Bolocam_LH
- Date:
- 23 May 2023 20:55:52
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- A deep 1.1 mm survey using Bolocam of the Lockman Hole, producing a map and galaxy candidate list. This survey encompasses 324 square arcmin to an rms noise level (filtered for point sources) of 1.4 mJy/beam. This project is described by Laurent et al., ApJ, 2005.
- ID:
- ivo://irsa.ipac/Bolocam/Images/Bolocam_Planck_SZ
- Title:
- Bolocam Planck SZ Cluster
- Short Name:
- Bolocam_PlanckSZ
- Date:
- 23 May 2023 20:55:52
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Caltech Submillimeter Observatory data corresponding to 46 galaxy clusters which have been observed by Bolocam at 2.1mm.
- ID:
- ivo://irsa.ipac/Spitzer/Images/SRELICS
- Title:
- Spitzer Reionization Lensing Cluster Survey
- Short Name:
- SRELICS
- Date:
- 01 May 2023 20:00:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Spitzer Reionization Lensing Cluster Survey (SRELICS, PI: Bradac) is the Spitzer counterpart to the RELICS HST Treasury program (PI: Coe) to survey 41 massive galaxy clusters.
- ID:
- ivo://irsa.ipac/Spitzer/Images/ELFLock
- Title:
- Eureka LBNL Far-IR Lockman Hole (ELFLock) Maps
- Short Name:
- ELFLock
- Date:
- 26 Apr 2023 17:15:24
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Eureka Lawrence Berkeley National Laboratory (LBNL) Far-IR Lockman Hole (ELFLock) maps are intended to measure the Far-IR background radiation with 160-micron observations from the Multiband Imaging Photometer for Spitzer (MIPS). The download gives the largest contiguous low-cirrus 160 micron far-infrared map made with Spitzer data, covering 8.5 square degrees. It also differs from standard Spitzer-processed mosaic maps in that the background information is preserved, where it is normally removed by median filtering (for point-source studies). The map is composed of BCD data from S16 processing of data sets with these Spitzer Astronomical Observation Requests (AORs). Its flux units are MJy/Sr and the pixel size is 15.9", though flux = 0.0 for pixels without data.