The Chandra X-ray Observatory is the U.S. follow-on to the Einstein
Observatory and one of NASA"s Great Observatories.
Chandra was formerly known as AXAF, the Advanced X-ray
Astrophysics Facility, but renamed by NASA in December, 1998.
Originally three instruments and a high-resolution mirror carried in
one spacecraft, the project was reworked in 1992 and 1993. The Chandra
spacecraft carries a high resolution mirror, two imaging detectors,
and two sets of transmission gratings. Important Chandra features are:
an order of magnitude improvement in spatial resolution, good
sensitivity from 0.1 to 10 keV, and the capability for high spectral
resolution observations over most of this range.
The Chandra Source Catalog (CSC) includes information about X-ray
sources detected in observations obtained using the Chandra X-ray
Observatory. Release 1.1 of the catalog includes about 138,000 point
and compact sources with observed spatial extents less than ~30 arcsec
detected in a subset of ACIS and HRC-I imaging observations released
publicly prior to the end of 2009.
Observed source positions and multi-band count rates are reported, as
well as numerous derived spatial, photometric, spectral, and temporal
calibrated source properties that may be compared with data obtained
by other telescopes. Each record includes the best estimates of the
properties of a source based on data extracted from all observations
in which the source was detected.
The Chandra Source Catalog is extracted from the CXC"s Chandra Data
Archive (CDA). The CXC should be acknowledged as the source of Chandra data.
For detailed information on the Chandra Observatory and datasets see:
http://cxc.harvard.edu/ for general Chandra information;
http://cxc.harvard.edu/cda/ for the Chandra Data Archive;
http://cxc.harvard.edu/csc/ for Chandra Source Catalog information.
The Chandra X-ray Observatory is the U.S. follow-on to the Einstein
Observatory and one of NASA"s Great Observatories.
Chandra was formerly known as AXAF, the Advanced X-ray
Astrophysics Facility, but renamed by NASA in December, 1998.
Originally three instruments and a high-resolution mirror carried in
one spacecraft, the project was reworked in 1992 and 1993. The Chandra
spacecraft carries a high resolution mirror, two imaging detectors,
and two sets of transmission gratings. Important Chandra features are:
an order of magnitude improvement in spatial resolution, good
sensitivity from 0.1 to 10 keV, and the capability for high spectral
resolution observations over most of this range.
The Chandra Source Catalog (CSC) includes information about X-ray
sources detected in observations obtained using the Chandra X-ray
Observatory. Release 2.0 of the catalog includes 317,167 point,
compact, and extended sources detected in ACIS and HRC-I imaging
observations released publicly prior to the end of 2014.
Observed source positions and multi-band count rates are reported, as
well as numerous derived spatial, photometric, spectral, and temporal
calibrated source properties that may be compared with data obtained
by other telescopes. Each record includes the best estimates of the
properties of a source based on data extracted from all observations
in which the source was detected.
The Chandra Source Catalog is extracted from the CXC"s Chandra Data
Archive (CDA). The CXC should be acknowledged as the source of Chandra data.
For detailed information on the Chandra Observatory and datasets see:
http://cxc.harvard.edu/ for general Chandra information;
http://cxc.harvard.edu/cda/ for the Chandra Data Archive;
http://cxc.harvard.edu/csc/ for Chandra Source Catalog information.
The Chandra X-ray Observatory is the U.S. follow-on to the Einstein
Observatory. Chandra was formerly known as AXAF, the Advanced X-ray
Astrophysics Facility, but renamed by NASA in December, 1998.
Originally three instruments and a high-resolution mirror carried in
one spacecraft, the project was reworked in 1992 and 1993. The Chandra
spacecraft carries a high resolution mirror, two imaging detectors,
and two sets of transmission gratings. Important Chandra features are:
an order of magnitude improvement in spatial resolution, good
sensitivity from 0.1 to 10 keV, and the capability for high spectral
resolution observations over most of this range.
Main characteristics of Solar System planets. Data are included in
the table, which includes non-standard EPN-TAP parameters. Data are
retrieved from Archinal et al 2018 (IAU report 2015,
2018CeMDA.130...22A) [radii] and Cox et al 2000 (Allen's astrophysical
quantities, 2000asqu.book.....C) [masses, heliocentric distances, and
rotation periods].
Pic du Midi de Bigorre in the French Pyrenees is the place where coronagraphic images were first realized, by Bernard Lyot in the 1930s. Since then, the solar instruments at Pic du Midi regularly provide images of the solar disc, solar prominences and solar corona.
Data for numerical modeling of planetary atmospheres
Date:
12 Jun 2017 10:19:38
Publisher:
Instituto de Astrofisica de Andalucia-CSIC; INTA-CAB
Description:
Numerical modeling of composition and thermal balance of planetary
atmospheres requires a considerable amount of laboratory data. Among
them, the absorption cross sections in the UV range are needed both
for computing the heating in the atmosphere and the photodissociation
coefficients to initiate a rich disequilibrium chemistry. Prompted by
these needs in the community and by the sparse collection of data in
several other web pages (http://www.science-softcon.de/ or
http://satellite.mpic.de/spectral_atlas/index.html whose data depend
on some pre-processing before being ingested in these models), this
web page aims at providing the community with absorption cross
sections in the range 20 nm to 400 nm equally spaced every 0.2, 0.5
and 1.0 nm. Also, original data as appearing in the refereed journal
and the reference itself are downloadable.