- 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.
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- 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/Images/Full
- Title:
- 2MASS Full Survey Image Atlas
- Short Name:
- 2MASS_Full
- 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/Images/Sixxfull
- Title:
- 2MASS Long Exposure (6x) Full Survey Image Atlas
- Short Name:
- 2MASS_Sixxfull
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- During the final months of 2MASS observatory operations, a campaign of targeted "long exposure" observations was carried out during times when no previously unscanned parts of the sky were available for the main survey. These observations used the same freeze-frame scanning technique employed for the survey, but with READ2-READ1 exposures six times longer than was used for normal survey observations (hence they are referred to as "6x" observations). The 2MASS 6x measurements were intended to probe ~1 magnitude deeper than the main survey in unconfused regions. Approximately 590 deg2 of sky distributed in 30 targeted regions were scanned at least once using the long exposures. Most of this area is concentrated in two large, comprehensive surveys of the Large and Small Magellanic Clouds, 383 deg2 and 127 deg2, respectively. Twenty-eight additional smaller fields were mapped in the 6x mode from both observatories, covering targets that include the Pleiades open cluster, galactic star formation complexes, M31, nearby galaxy clusters and the Lockman Hole.
- ID:
- ivo://irsa.ipac/2MASS/Images/Sixxcat
- Title:
- 2MASS Long Exposure (6x) Image Atlas
- Short Name:
- 2MASS_Sixxcat
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- During the final months of 2MASS observatory operations, a campaign of targeted "long exposure" observations was carried out during times when no previously unscanned parts of the sky were available for the main survey. These observations used the same freeze-frame scanning technique employed for the survey, but with READ2-READ1 exposures six times longer than was used for normal survey observations (hence they are referred to as "6x" observations). The 2MASS 6x measurements were intended to probe ~1 magnitude deeper than the main survey in unconfused regions. Approximately 590 deg2 of sky distributed in 30 targeted regions were scanned at least once using the long exposures. Most of this area is concentrated in two large, comprehensive surveys of the Large and Small Magellanic Clouds, 383 deg2 and 127 deg2, respectively. Twenty-eight additional smaller fields were mapped in the 6x mode from both observatories, covering targets that include the Pleiades open cluster, galactic star formation complexes, M31, nearby galaxy clusters and the Lockman Hole.
- ID:
- ivo://irsa.ipac/Herschel/Images/MESS
- Title:
- Mass-loss of Evolved StarS
- Short Name:
- MESS
- Date:
- 27 Oct 2022 19:00:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- Herschel data from the "Mass-loss of Evolved StarS" (MESS) Guaranteed-Time Key Program are available here. IRSA is serving the MESS PACS imaging of 108 evolved stars. This is Herschel program KPGT_mgroen01_1. The sample of AGB stars has been selected to cover all chemical types (M-, S-, C-stars), variability types (irregular, semi-regular, Miras) and periods, and mass-loss rates. Stars have been selected to have high IRAS fluxes and low background levels.
- ID:
- ivo://irsa.ipac/2MASS/Images/Sixdeg
- Title:
- 2MASS Six Degree Mosaics
- Short Name:
- 2MASS_Sixdeg
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Two Micron All Sky Survey (2MASS; Skrutskie et al. 2006, AJ 131, 1163) was a survey of the entire sky in three infrared wavebands: J (1.235 microns), H (1.662 microns), and KS (2.159 microns). The 2MASS All-Sky Data Release products include 4,121,439 Atlas Images (512 x 1024 pixels, 1 arcsec/pixel) in the three survey bands. For users wishing to visualize regions of the sky that are significantly larger than the Atlas Images, or that fall close to the edge of an Atlas Image, the NASA/IPAC Infrared Science Archive (IRSA) has created 6 x 6 degree 2MASS mosaics. The primary set consists of 1,734 mosaics with a 1 arcsecond pixel scale (the same pixel scale as the Atlas Images), resulting in individual files that are 1.9 Gb. Also available are 52 Mb mosaics that have been binned to a 6 arcsecond pixel scale.
- ID:
- ivo://irsa.ipac/MUSYC/Images
- Title:
- Multiwavelength Survey by Yale-Chile
- Short Name:
- MUSYC
- Date:
- 27 Oct 2022 19:00:00
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The Multiwavelength Survey by Yale-Chile (MUSYC) consists of deep optical medium-band and broadband optical and near-IR imaging of the ~30'x30' Extended Chandra Deep Field South. This field includes the GOODS-South field and the Hubble Ultra Deep Field, and covers the same area as the SIMPLE Spitzer Legacy program.
- ID:
- ivo://irsa.ipac/WISE/Images/postcryo
- Title:
- NEOWISE Post-Cryo Image Atlas
- Short Name:
- NEOWISE_Postcryo
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The 2013 NEOWISE Post-Cryo Data Release is comprised of data taken during the four month period following the complete exhaustion of cryogens in the Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010) payload. During this period, known as the NEOWISE Post-Cryo mission phase, data were collected by the 3.4 and 4.6 um detectors at sensitivities similar to those achieved during the full cryogenic phase. WISE scanned approximately 70% of the sky during the Post-Cryo phase, completing a survey of the inner Main Asteroid Belt and a second coverage of the inertial sky. WISE is a NASA Astrophysics Division Medium Class Explorer mission that conducted a sensitive mid-infrared imaging survey of the entire sky in 2010 and 2011. WISE mapped the sky with a 40 cm telescope and camera equipped with four 1kx1k array detectors that imaged the same 47'x47' field-of-view at 3.4, 4.6, 12, and 22 um (W1, W2, W3 and W4) simultaneously. The WISE telescope, optics and detectors were cooled by a two-stage solid hydrogen cryostat. WISE surveyed the sky 1.2 times between January 7 and August 6 2010, during its full cryogenic mission phase, when both inner and outer cryogen tanks held hydrogen ice and all detectors operated at full sensitivity. Data collected during this phase make up the March 2012 All-Sky Data Release, which is the best compendium of information about the static mid-infrared sky. WISE continued to survey an additional 30% of the sky between 6 August and 29 September 2010 UTC, the 3-Band Cryo phase, using the W1, W2 and W3 detectors after the hydrogen ice sublimated in the outer cryogen tank, but while the detectors were still cooled by cryogen in the inner tank. Data collected during this phase comprised the June 2012 supplemental 3-Band Cryo Data Release. The NEOWISE Post-Cryo mission phase began on 29 September 2010 UTC after the solid hydrogen in the inner cryogen tank was exhausted and the focal plane assemblies, optics and telescope gradually warmed to approximately 73.5 K. The W1 and W2 HgCdTe detectors remained fully operational during this time with sensitivities close to those observed in the cryogenic mission phases (Figures 1 and 2), although the number of high noise pixels increased as the detectors warmed. No useful data were collected by the W3 and W4 Si:As detectors that were above their operating temperatures and were saturated by thermal emission from payload. WISE surveyed approximately 70% of the sky in the Post-Cryo mission phase until 1 February 2011 UTC when data collection was halted.
- ID:
- ivo://irsa.ipac/WISE/Images/prelimpostcryo
- Title:
- NEOWISE Post-Cryo Preliminary Image Atlas
- Short Name:
- NEOWISEprelimpc
- Date:
- 01 Oct 2024
- Publisher:
- NASA/IPAC Infrared Science Archive
- Description:
- The NEOWISE Post-Cryo Preliminary Data Release contains 3.4 and 4.6 um (W1 and W2) Single-exposure image and extracted source data that were acquired by Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010) following the exhaustion of solid hydrogen in the satellite's payload inner and outer cryogen tanks. During this period, known as the NEOWISE Post-Cryo survey phase, the WISE optics and focal plane assemblies warmed to 73.5 K, and the W1 and W2 HgCdTe detectors continued to operate with sensitivities close to those achieved during the full cryogenic mission phase. No useful data were obtained by WISE's 12 and 22 um Si:As detectors because of the higher temperatures. WISE scanned approximately 70% of the sky during the Post-Cryo phase, completing a survey of the inner Main Asteroid Belt, and a second coverage epoch of the inertial sky.
