Hinode & SDO Sigmoid Catalog

Hinode at MSFC

SDO at GSFC

XRT at SAO

AIA at SAO

This catalog contains various information on sigmoidal active regions that have been observed by Hinode and SDO. Click 'Display Key' for an explanation of each column. Images and additional information are available by clicking on the icons next to each entry.

Column Headers:

ID: A uniquely identifying number for a specific sigmoid.
NOAA #: The NOAA classification number given to Active Region associated with the sigmoid.
T-Best: The time in UT when the sigmoidal shape is most prominent in Hinode/XRT observations.
X & Y: The center location of the sigmoid in arcsec from disk center at T-Best.
Size: Measure of the sigmoid's long axis (arcsec).
Aspect Ratio: Ratio of the long axis to the average of the short axes.
FWHM: The full width at half maximum of the sigmoid's core at T-best (arcsec).
Leading Length: The length of the leading edge of the sigmoid's short axis (arcsec).
Trailing Length: The length of the trailing edge of the sigmoid's short axis (arcsec).
Orientation: The loop morphology. S = S-Shaped, I = Inverted S-Shaped and H = Horizontal.
Hemisphere: Which hemisphere the sigmoid is located in. N = North and S = South.
171Å Filament: The length of a 171 Å filament in arcsec during T-Best. If no filament was located the column contains a dash (-).
304Å Filament: The length of a 304 Å filament in arcsec during T-Best. If no filament was located the column contains a dash (-).
Ha Filament: Is there an Ha filament present during T-Best? Y = Yes, N = No, and ? = Undetermined
Sunspots: How many sunspots are located in this region at T-Best.
Net Flux: The total magnetic flux at the end of sigmoid's disk passage compared to the total magnetic flux at the start (Maxwells).
Max. Flux: The maximum total magetic flux under the sigmoid (Maxwells).
Flux Plot: A plot of the magnetic flux over time.
Flare: How many of each GOES class flares there were during the lifetime of the sigmoid.
CME: Not yet implemented in this version of the catalog.
Filament Eruption: Were any filament eruptions observed. Y = Yes and N = No, and M = Maybe.
Transient Coronal Hole: If there was a Transient Coronal Hole observed during the sigmoid's lifetime. Y = Yes and N = No, and M = Maybe.
Flare Ribbons: Were there Flare Ribbons observed after a flare? Y = Yes and N = No.
Post-Flare Loops: Were there Post-Flare Loops observed after a flare? Y = Yes and N = No.
Nearby Coronal Hole: Was a stable Coronal Hole observed next to the region. Y = Yes, N = No, and M = Maybe. Not implemented.

Additional Features:

Column sorting: Each column may be sorted on by clicking headers. Combination-sort by shift-clicking multiple column headers.
Drop down field: icons activate a drop-down field containing additional comments.

Clickable cutout images in either XRT or AIA 335 passbands as well as images taken from Solar Monitor.
Cutout movies can be downloaded through links under Movie header.

Search bar in upper-right can filter table based on keywords in the comments (e.g. enter "kink" to isolate events where evidence for kink instability was noticed).

	ID	NOAA #	T-Best (UT)	X (")	Y (")	Size (")	Aspect Ratio	FWHM (")	Leading Length (")	Trailing Length (")	Orientation	Hemisphere	171Å Filament (")	304Å Filament (")	Hα Filament	Sunspots	Net Flux (1E21 Mx)	Max. Flux (1E21 Mx)	Flux Plot	Flare	CME	FI ER	Transient CH	Flare Ribbons	Post-FL Loops	Nearby CH	Row Details

Please see the old sigmoid catalog paper, Savcheva et al. (2014), and the new sigmoid catalog paper, Bolan, Prchlik, and Savcheva (2019), for additional information and results from this catalog. Information on the code is available at GitHub and readthedocs.

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