J/ApJS/183/225    A catalog of coronal "EIT wave" transients   (Thompson+, 2009)

A catalog of coronal "EIT wave" transients. Thompson B.J., Myers D.C. <Astrophys. J. Suppl. Ser., 183, 225-243 (2009)> =2009ApJS..183..225T
ADC_Keywords: Sun ; Ultraviolet Keywords: Sun: corona - Sun: UV radiation - waves Abstract: Solar and Heliospheric Observatory (SOHO) Extreme ultraviolet Imaging Telescope (EIT) data have been visually searched for coronal "EIT wave" transients over the period beginning from 1997 March 24 and extending through 1998 June 24. The dates covered start at the beginning of regular high-cadence (more than 1 image every 20 minutes) observations, ending at the four-month interruption of SOHO observations in mid-1998. One hundred and seventy six events are included in this catalog. The observations range from "candidate" events, which were either weak or had insufficient data coverage, to events which were well defined and were clearly distinguishable in the data. Included in the catalog are times of the EIT images in which the events are observed, diagrams indicating the observed locations of the wave fronts and associated active regions, and the speeds of the wave fronts. The measured speeds of the wave fronts varied from less than 50 to over 700km/s with "typical" speeds of 200-400km/s. Description: The catalog consists of all of the observations in the EIT 195Å images, from January 1996 through June 1998, in which we were able to find evidence of EIT wave-like phenomena. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 62 461 Full EIT wave catalog notes.dat 76 16 Notes in table3
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1-176] Event running number 5- 14 A10 "YYYY/MM/DD" Date Date of the first image showing the wave front (1) 16 A1 --- --- [Q] 17 I1 --- Qual [0,5] Quality rating, best is 5 (2) 19 A1 --- n_Qual [S] S means sharp waves 21- 23 I3 --- NSloc Apparent heliographic souce location N/S (3) 25- 27 I3 --- EWloc Apparent heliographic source location E/W (3) 29- 36 A8 "h:m:s" t(pre) Pre-event image time 38- 45 A8 "h:m:s" t(ima) Image time in which the wave is observed 47- 49 I3 km/s Speed ? Plane-of-Sky speed 51- 53 I3 km/s SpeedP ? Projected speed 55 A1 --- f_SpeedP [o] means "off limb" (4) 57- 58 A2 --- Dir [NESW ] Direction of measurement (NESW) 60- 62 I3 --- Note ? Note on event, detailed in notes.dat
Note (1): In cases where the pre-event image listed in the catalog occurs prior to 00:00 UT and the first image occurs after 00:00 UT, the date of the pre-event image is 1 day before the listed date. Note (2): Quality rating described (See section 2.3) as follows: Q0 = Very low reliability; either a bright front with no clear evidence of propagation, an extremely faint disturbance, or unusual structure. We suspect that this category includes a number of weak waves as well as non-related phenomena. <10% confidence level. (37 events from 176). Q1 = Low reliability; either a faint bright front with structure which may resemble those in the class 5 events, or some evidence of a propagating brightening. 10-25% confidence level. (54 events) Q2 = Low reliability; faint to strong bright front or a brightening which is moving. 25-50% confidence level. (39 events) Q3 = Intermediate reliability; Either multiple images of a propagating brightening, or a clear observation of a bright front which is very similar in structure to the class 5 waves. 50-75% confidence level. (25 events). Q4 = High reliability; Multiple images of a propagating brightening, spatial correspondence from one image to the next, fairly high reliability. Confidence level >75%. (16 events). Q5 = Nearly definite reliability; Clear evidence of a propagating bright front in multiple images, extent of the wave is far from other activity such that the transient increase in emission is able to be distinguished from other evolving features. 100% confidence level. (5 events) Note (3): Typically, the location listed is the heliographic latitude and longitude of an associated flaring/erupting active region. In the cases where the active region was part of an extended complex, the source location was identified as the location within the complex. For the cases when the wave did not appear to originate at an active region, the source location listed is either an evolving solar feature or an apparently central origination point. A source longitude of 90 or -90 indicates that the apparent source of the wave was either at, above, or possibly behind the solar limb. Note (4): "off limb" = wave fronts were measured above the limb of the Sun, in which case the Plane-of-Sky speed is a more accurate representation of the wave speed.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Note Note number 5- 76 A72 --- Text Text of note
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 11-Feb-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line

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