Gravitational Wave Open Science Center

Defining the DATA flag

*Some of the links on this page are to wiki pages that require ligo.org credentials. If you need to gain access to the information there, please contact us at losc@ligo.org.

S5 Data set

We have made an effort to make available all S5 data that may be interpreted as a measure of gravitational wave strain. In most cases, the DATA flag was defined to be equivalent to times that pass CAT 1 vetoes from the CBC high mass search. This can be achieved with calls to the LIGO segment database with calls of the form:

/usr/bin/ligolw_segment_query -q -s 815155213 -e 875232014 -a
H1:Science,H1:Injection -b
H1:MISSING_RDS_C03_L2,H1:OUT_OF_LOCK,H1:AS_TRIGGER,H1:MISSING_RAW,H1:INVALID_DARMERR,H1:CORRUPTED_RDS_C03_LX,H1:PEM_INJECTION
-t https://metaserver.phy.syr.edu

/usr/bin/ligolw_segment_query -q -s 815155213 -e 875232014 -a
H2:Science,H1:Injection -b
H2:MISSING_RDS_C03_L2,H2:OUT_OF_LOCK,H2:AS_TRIGGER,H2:MISSING_RAW,H2:INVALID_DARMERR,H2:CORRUPTED_RDS_C03_LX,H2:PEM_INJECTION
-t https://metaserver.phy.syr.edu

/usr/bin/ligolw_segment_query -q -s 815155213 -e 875232014 -a
L1:Science,L1:Injection -b
L1:MISSING_RDS_C03_L2,L1:OUT_OF_LOCK,L1:AS_TRIGGER,L1:MISSING_RAW,L1:INVALID_DARMERR,L1:CORRUPTED_RDS_C03_LX,L1:PEM_INJECTION
-t https://metaserver.phy.syr.edu

In addition, diagnostic plots of the data set revealed 94 additional seconds of data which were of very poor quality, and so were removed from the data set. These bad times were identified with the criteria that including them caused the standard deviation of all h(t) strain data in the GWOSC file to exceed 10-15. These 94 seconds are listed in this text file.

S6 Data set

As with S5, we have made available all data that may be interpreted as a measure of gravitational wave strain, defined by the S6 DATA flag: times that pass CAT 1 vetoes from the CBC high mass search. Some features of this choice are documented *here. A procedure for constructing the S6 segment list is described on *this wiki page.

O1 Data Set

For O1, we have made available the data that pass all of the "ANALYSIS_READY", "CBC CAT 1", and "BURST CAT 1" criteria, labeled in GWOSC with the DATA flag. *This wiki page shows the scripts used to construct the O1 DATA flag.

O2 Data Set

For O2, we have made available the data that pass all of the "ANALYSIS_READY", "CBC CAT 1", and "BURST CAT 1" criteria, labeled in GWOSC with the DATA flag. *This wiki page shows the scripts used to construct the O2 DATA flag.

O3 Data Set

For O3, we have made available the data that pass all of the "ANALYSIS_READY", "CBC CAT 1", and "BURST CAT 1" criteria, labeled in GWOSC with the DATA flag. *This wiki page shows some details to explain how tha DATA flag was constructed.