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ASIAGOSN99: Help

ASIAGOSN99 - Asiago Supernova Catalog (1999 Version)


Overview

Ten years after the publication of the previous release of this catalog, in 1999 the authors (R. Barbon et al.) presented a new edition of the Asiago Supernova Catalogue that had been updated to December 31, 1998 and that contained data for 1447 supernovae (SNe) and their parent galaxies. In addition to the list of the data for a large number of new SNe, they made an effort to search the literature for new information on past SNe as well. They also tried to update and homogenize the data for the parent galaxies. The authors intend this catalog to form a large and modern database for statistical studies of the SNe phenomenon.

This catalogue supersedes the previous (1989) version of the Asiago Supernova Catalog (CDS Catalog II/159).


Catalog Bibcode

1999A&AS..139..531B

References

The Asiago Supernova Catalogue - 10 years after Barbon R., Buondi V., Cappellaro E., and Turatto M. 1999, A&AS, 139, 531 (CDS Catalog II/227).

Provenance

This HEASARC version of the 1999 Asiago Supernova Catalogue was created in April 2000 based on CDS Catalog II/227.

Parameters

Mult_Sn_Flag
This flag is set to 'S' if there have been multiple SN discoveries in the same galaxy.

Name
The supernova designation in the standard form as recommended by the Dictionary of Nomenclature of Celestial Objects, consisting of the 'SN' prefix followed by the year it was discovered, and either the upper-case letters 'A' through 'Z' (for the first 26 SNe discovered in a given year) or the lower-case letters 'aa', 'ab', etc. (for the 27th, 28th, etc., SNe discovered in a given year). Notice that searches by name in the HEASARC database are presently translated to upper-case characters, so that letters should be specified in name searches in ASIAGOSN99.

Unconf_Flag
This flag is set to '?' if the SN has not been confirmed.

Galaxy
The parent galaxy identification. In case a galaxy has different identifications, the following naming priority was adopted: NGC, IC, MCG (M), UGC, ESO (E), PGC, Leda, and then others. Anonymous galaxies are listed with the letter A prefix followed by the co-ordinates. In a few cases, where the association with a definite parent galaxy was not possible, the field is labelled 'INTERGALACTIC'.

RA_Galaxy
The Right Ascension of the parent galaxy fixed in the J2000.0 equinox in which it was given in the original catalog, and specified to the nearest second of time.

RA_Galaxy_Flag
This flag is set to ':' when the RA of the galaxy is known to only 0.1 minutes of time.

Dec_Galaxy
The Declination of the parent galaxy fixed in the J2000.0 equinox in which it was given in the original catalog, and specified to the nearest arcsecond.

Pos_Flag
This flag indicates whether or not positional information for a supernova was provided in the original catalog as obtained from the CDS. For many, particularly the older, SNe, this parameter was not given there, so, in such cases, the HEASARC has set the values of the parameters ra and dec equal to those of the parameters ra_galaxy and dec_galaxy, respectively. In order for such cases to be readily identified, we have added this new parameter pos_flag to the HEASARC version of this catalog: it is set to the value 'G' for all cases where positional information for a supernova was NOT explicitly provided in the original catalog.

RA
The RA of the supernova in the specified equinox. Notice that the input table from which this parameter was obtained contained this parameter in J2000.0 equinox specified to the nearest 0.01 or 0.1 seconds of time. For many, particularly the older, SNe, this parameter was not given in the original catalog as obtained from the CDS. In such cases, the HEASARC has set the value of the parameter ra equal to that of the parameter ra_galaxy: in order for such case to be readily identified, we have added a new parameter in the HEASARC version of this catalog called pos_flag which is set to the value 'G' for all such cases.

Dec
The declination of the supernova in the specified equinox. Notice that the input table from which this parameter was obtained contained this parameter in J2000.0 equinox specified to the nearest 0.1 or 1 arcseconds. For many, particularly the older, SNe, this parameter was not given in the original catalog as obtained from the CDS. In such cases, the HEASARC has set the value of the parameter dec equal to that of the parameter dec_galaxy: in order for such case to be readily identified, we have added a new parameter in the HEASARC version of this catalog called pos_flag which is set to the value 'G' for all such cases.

LII
The galactic longitude of the supernova.

BII
The galactic latitude of the supernova.

Dec_Flag
This flag is set to ':' when the declination of the supernova is known to only 0.1 arcminutes.

Morph_Type
The parent galaxy morphological type.

T_Type
The parent galaxy morphological type code using the RC3 coding system.

Inclination
Only given for disk-like systems, this is the inclination of the polar axis with respect to the line of sight, in degrees. This parameter is set to 0 for face-on systems.

PA
The position angle of the major axis of the parent galaxy, measured counterclockwise from North, in degrees.

Radial_Velocity
The heliocentric radial velocity of the parent galaxy, measured in km/s, typically given for nearby galaxies with redshifts less than 0.1.

Radial_Velocity_Flag
A flag set to ':' if the radial velocity is uncertain.

Redshift
The redshift of the parent galaxy, typically given for distant galaxies with redshifts greater than or equal to 0.1.

Redshift_Flag
A flag set to ':' if the redshift is uncertain.

Bmag_Flag
A flag that, if set, indicates that the magnitude given by the parameter bmag is NOT the integrated B magnitude of the parent galaxy, but is either the photographic magnitude, if set to 'P', the R-band magnitude, if set to 'R', or the V-band magnitude, if set to 'V'.

Bmag
The integrated B magnitude of the parent galaxy, mostly from the RC3 or the LEDA database, except if the parameter bmag_flag (q.v.) is set, in which case it is the magnitude in a different bandpass.

Log_Diameter
The decimal logarithm of the apparent isophotal diameter of the supernova's parent galaxy, in units of 0.1 arcminutes.

RA_Offset
The offset of the supernova in the RA (E or W according to the value of the parameter ra_offset_dir) direction from the nucleus of the parent galaxy, in arcseconds.

RA_Offset_Dir
The direction of the offset of the supernova in the RA direction relative to the nucleus of the parent galaxy.

Dec_Offset
The offset of the supernova in Declination (N or S according to the value of the parameter dec_offset_dir) from the nucleus of the parent galaxy, in arcseconds.

Dec_Offset_Dir
The direction of the offset of the supernova in the Declination direction relative to the nucleus of the parent galaxy.

Pos_Comment
A comment on the position of the supernova relative to the center of the parent galaxy for cases in which detailed values of the ra_offset and dec_offset parameters are not available: 'CC' means the Sn was close to the galaxy center, while 'NC' means it was near the center.

Band_Maxmag
The photometric band in which the value of the SM maximum or discovery magnitude (maxmag) is given: B, I, K, R, V, or r. If blank, this means that the observation was not made in a standard photometric system, e.g., those reported in the original discovery announcement as photographic, blue plate, red plate, CCD without filter, and so on.

Maxmag
The supernova magnitude at maximum (or discovery) in the photometric band given in the parameter band_maxmag, if available; if the value of the parameter maxmag_flag is blank, this is the maximum magnitude, whereas if the value is 'D', this is the discovery magnitude.

Maxmag_Flag
This flag is set to ':' if the value of the parameter maxmag is considered to be uncertain.

Maxmag_Type
This flag is set to 'D', if the parameter maxmag contains the discovery magnitude rather than the maximum magnitude, and is set to 'R' for a supernova observed only in the radio.

SN_Type
The supernova type, mostly inferred from spectroscopy; in a number of cases, marked by '*', the SN type has been inferred from the light curve.

Max_Epoch
The date of the maximum or discovery (if flag_max_epoch='D') of the supernova. If no explicit year is given, then the year corresponding to the value of max_epoch is that given in the name of the supernova, e.g., the max_epoch for SN 1885A is 'Aug21', indicating that this SN reached its maximum on August 21 1885, whereas the max_epoch for SN 1982a is '16/08/79', indicating that it reached its maximum on August 16 1979 (in both cases flag_max_epoch = ' ', implying this is the maximum not discovery magnitude).

Flag_Max_Epoch
This flag is blank if the parameter max_epoch contains the date of the SN maximum, or 'D' if the parameter max_epoch contains the date of the SN discovery.

Discoverer
The name of the SN discoverer(s). For organized search teams, the standard acronyms are given, e.g., EROS, MACHO, etc.

Class
The browse classification as created by the HEASARC based on the value of the sn_type parameter.


Contact Person

Questions regarding the ASIAGOSN99 database table can be addressed to the HEASARC User Hotline.
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
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