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Search Results
- ID:
- ivo://irsa.ipac/SSA
- Title:
- IRSA Simple Spectral Access (SSA) Protocol Service
- Short Name:
- IRSA SSA
- Date:
- 06 May 2021 17:44:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- This is IRSA's implementation of the IVOA Simple Spectral Access (SSA) protocol. Our SSA service allows a rich variety of searches against IRSA's varied holdings.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/XSC
- Title:
- 2MASS All-Sky Extended Source Catalog
- Short Name:
- 2MASS-XSC
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- 2MASS has uniformly scanned the entire sky in three near-infrared bands to detect and characterize point sources brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 1.
- ID:
- ivo://irsa.ipac/2MASS/Images/Allsky
- Title:
- 2MASS All-Sky Image Atlas
- Short Name:
- 2MASS_Allsky
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The 2MASS All-Sky Data Release contains Image and Catalog data covering 99.998% of the sky, derived from all northern and southern Survey observations. The All-Sky Release products include a Point Source Catalog (PSC), containing positions and photometry for 470,992,970 objects, an Extended Source Catalog (XSC), containing positions, photometry and basic shape information for 1,647,599 resolved sources, most of which are galaxies, and the Image Atlas, containing over 4,121,439 J, H and Ks FITS images covering the sky.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/PSC
- Title:
- 2MASS All-Sky Point Source Catalog
- Short Name:
- 2MASS-PSC
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- 2MASS has uniformly scanned the entire sky in three near-infrared bands to detect and characterize point sources brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 1.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/ScanInfo
- Title:
- 2MASS All-Sky Survey Scan Information Table
- Short Name:
- 2MASS Scan Info
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The 2MASS Scan Information Table provides basic data for each scan in the 2MASS All Sky Release. The table is organized according to the broad function and utility of the parameters: positional information, photometric information, source detection statistics, etc.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/CalXSWDB
- Title:
- 2MASS Calibration Extended Source Working Database
- Short Name:
- 2MASS Cal XSWDB
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Photometric calibration for 2MASS was performed using observations of calibration fields made at regular intervals during each night of survey operations. Measurements of standard stars in the fields were used to derive the photometric zero point offsets as a function of time during each night. Atmospheric extinction coefficients were derived from 2MASS observations made over long periods. 2MASS calibration fields, or tiles, are 1° long in declination and approximately 8.5' wide in right ascension. There are 35 regular survey calibration fields distributed at approximately two hour intervals in right ascension near declinations of approximately -30°, 0° and +30°. An additional five calibration fields were defined in and around the Large and Small Magellanic Clouds to support the deep observation (6x) campaign towards the end of survey operations. Over the course of the survey, the regular calibration fields were scanned between 562 and 3692 times in nominally photometric conditions. Equatorial fields were observed from both observatories, so were observed more frequently than those near ±30° which were observed with only one telescope. The special Magellanic Cloud calibration fields were observed 108 to 468 times between November 2000 and February 2001. Calibration scan Atlas Images, and Point and Extended Source Working Databases (Cal-PSWDB and Cal-XSWDB), analogous to those from the main survey, were produced from the calibration scan pipeline data reduction. The calibration Image Atlas and WDBs are the fundamental processing archives of the data from 73,230 calibration scans taken in photometric conditions during 2MASS survey operations. The Cal-WDBs contain positions, magnitudes and characteristics of 191,464,020 and 403,811 point and extended "source" extractions, respectively. The calibration Image Atlas contains 878,769 FITS images in the three survey bandpasses redundantly covering ~5 deg2 of sky. Unlike the main survey and 6x observations, "Catalogs" have not been derived from the Calibration WDBs.
- ID:
- ivo://irsa.ipac/2MASS/Images/Cal
- Title:
- 2MASS Calibration Image Atlas
- Short Name:
- 2MASS_Cal
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Photometric calibration for 2MASS was performed using observations of calibration fields made at regular intervals during each night of survey operations. Measurements of standard stars in the fields were used to derive the photometric zero point offsets as a function of time during each night. Atmospheric extinction coefficients were derived from 2MASS observations made over long periods. 2MASS calibration fields, or tiles, are 1° long in declination and approximately 8.5' wide in right ascension. There are 35 regular survey calibration fields distributed at approximately two hour intervals in right ascension near declinations of approximately -30°, 0° and +30°. An additional five calibration fields were defined in and around the Large and Small Magellanic Clouds to support the deep observation (6x) campaign towards the end of survey operations. Calibration scan Atlas Images, and Point and Extended Source Working Databases (Cal-PSWDB and Cal-XSWDB), analogous to those from the main survey, were produced from the calibration scan pipeline data reduction.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/CalMXSIT
- Title:
- 2MASS Calibration Merged Extended Source Information Table
- Short Name:
- 2MASS Cal MXSIT
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Photometric calibration for 2MASS was performed using observations of calibration fields made at regular intervals during each night of survey operations. Measurements of standard stars in the fields were used to derive the photometric zero point offsets as a function of time during each night. Atmospheric extinction coefficients were derived from 2MASS observations made over long periods. 2MASS calibration fields, or tiles, are 1° long in declination and approximately 8.5' wide in right ascension. There are 35 regular survey calibration fields distributed at approximately two hour intervals in right ascension near declinations of approximately -30°, 0° and +30°. An additional five calibration fields were defined in and around the Large and Small Magellanic Clouds to support the deep observation (6x) campaign towards the end of survey operations. Over the course of the survey, the regular calibration fields were scanned between 562 and 3692 times in nominally photometric conditions. Equatorial fields were observed from both observatories, so were observed more frequently than those near ±30° which were observed with only one telescope. The special Magellanic Cloud calibration fields were observed 108 to 468 times between November 2000 and February 2001. The following table contains brief descriptions of the entries in the Survey, 6x and Calibration Merged Point Source Information Tables. The merged source tables contain the mean positions magnitudes and uncertainties for sources detected multiple times in each of the 2MASS data sets. The merging was carried out using an autocorrelation of the respective databases to identify groups of extractions that are positionally associated with each other, all lying within a 1.5" radius circular region. A number of confirmation statistics are also provided in the tables that can be used to test for source motion and/or variability, and the general quality of the merge.
- ID:
- ivo://irsa.ipac/2MASS/Catalog/CalMPSIT
- Title:
- 2MASS Calibration Merged Point Source Information Table
- Short Name:
- 2MASS Cal MPSIT
- Date:
- 25 May 2021 00:17:54
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Photometric calibration for 2MASS was performed using observations of calibration fields made at regular intervals during each night of survey operations. Measurements of standard stars in the fields were used to derive the photometric zero point offsets as a function of time during each night. Atmospheric extinction coefficients were derived from 2MASS observations made over long periods. 2MASS calibration fields, or tiles, are 1° long in declination and approximately 8.5' wide in right ascension. There are 35 regular survey calibration fields distributed at approximately two hour intervals in right ascension near declinations of approximately -30°, 0° and +30°. An additional five calibration fields were defined in and around the Large and Small Magellanic Clouds to support the deep observation (6x) campaign towards the end of survey operations. Over the course of the survey, the regular calibration fields were scanned between 562 and 3692 times in nominally photometric conditions. Equatorial fields were observed from both observatories, so were observed more frequently than those near ±30° which were observed with only one telescope. The special Magellanic Cloud calibration fields were observed 108 to 468 times between November 2000 and February 2001. The following table contains brief descriptions of the entries in the Survey, 6x and Calibration Merged Point Source Information Tables. The merged source tables contain the mean positions magnitudes and uncertainties for sources detected multiple times in each of the 2MASS data sets. The merging was carried out using an autocorrelation of the respective databases to identify groups of extractions that are positionally associated with each other, all lying within a 1.5" radius circular region. A number of confirmation statistics are also provided in the tables that can be used to test for source motion and/or variability, and the general quality of the merge.
