S241124w

Event ID: GW241124_024914 Trigger ID: S241124w cbc-workflow-er16-o4b

Current version: 327b059a recorded 2026-07-28 13:42 UTC v3

The cached copy of the current version is shown. Refresh

History

Version history

Showing cached copy.

Viewing version d8b2ae98 (historical) — not the current record

Selected version details

Changes from previous version e67d888b to selected version d8b2ae98

Change legend: Added exists only in the selected version; Removed exists only in the baseline; Changed has different values.

35 field changes.

Changed GraceDB › Events › 0 › CatalogVersion

Baseline

5

Selected

7
Changed GraceDB › Events › 1 › CatalogVersion

Baseline

5

Selected

7
Changed GraceDB › Events › 1 › FAR

Baseline

0.0000001818458520359014

Selected

0.000000191824290888812
Changed GraceDB › Events › 1 › UID

Baseline

G602686

Selected

G620545
Changed GraceDB › Events › 1 › XML

Baseline

https://gracedb.ligo.org/api/events/G602686/files/coinc.xml

Selected

https://gracedb.ligo.org/api/events/G620545/files/coinc.xml
Changed GraceDB › Events › 2 › CatalogVersion

Baseline

5

Selected

7
Added GraceDB › Events › 3 › CatalogNumber

Baseline

Missing

Selected

5
Added GraceDB › Events › 3 › CatalogVersion

Baseline

Missing

Selected

7
Changed GraceDB › Events › 3 › FAR

Baseline

0.0000001277238764202069

Selected

0.000000448839771
Changed GraceDB › Events › 3 › GPSTime

Baseline

1416451772.353149

Selected

1416451772.34259
Removed GraceDB › Events › 3 › H1SNR

Baseline

6.0223422

Selected

Missing
Removed GraceDB › Events › 3 › HasMassGap

Baseline

0.0

Selected

Missing
Removed GraceDB › Events › 3 › HasNS

Baseline

0.0

Selected

Missing
Removed GraceDB › Events › 3 › HasRemnant

Baseline

0.0

Selected

Missing
Changed GraceDB › Events › 3 › InOfflineCatalog

Baseline

False

Selected

True
Removed GraceDB › Events › 3 › L1SNR

Baseline

6.0770378

Selected

Missing
Removed GraceDB › Events › 3 › Mass1

Baseline

50.356156

Selected

Missing
Removed GraceDB › Events › 3 › Mass2

Baseline

48.294952

Selected

Missing
Changed GraceDB › Events › 3 › NetworkSNR

Baseline

8.979118225123939

Selected

8.473666266734842
Removed GraceDB › Events › 3 › Pastro

Baseline

0.9127522579079351

Selected

Missing
Removed GraceDB › Events › 3 › Pbbh

Baseline

0.9127522579079302

Selected

Missing
Removed GraceDB › Events › 3 › Pbns

Baseline

0.00000000000000006574247830493903

Selected

Missing
Changed GraceDB › Events › 3 › Pipeline

Baseline

gstlal

Selected

CWB
Removed GraceDB › Events › 3 › Pnsbh

Baseline

0.000000000000004721372304758144

Selected

Missing
Changed GraceDB › Events › 3 › SearchType

Baseline

low latency

Selected

offline
Removed GraceDB › Events › 3 › Skymap

Baseline

https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits

Selected

Missing
Removed GraceDB › Events › 3 › SourceClassification

Baseline

https://gracedb.ligo.org/api/events/G527390/files/gstlal.p_astro.json

Selected

Missing
Removed GraceDB › Events › 3 › Spin1z

Baseline

-0.10828125

Selected

Missing
Removed GraceDB › Events › 3 › Spin2z

Baseline

-0.10828125

Selected

Missing
Changed GraceDB › Events › 3 › State

Baseline

preferred

Selected

neighbor
Changed GraceDB › Events › 3 › UID

Baseline

G527390

Selected

G619947
Removed GraceDB › Events › 3 › V1SNR

Baseline

2.7249899

Selected

Missing
Removed GraceDB › Events › 3 › XML

Baseline

https://gracedb.ligo.org/api/events/G527390/files/coinc.xml

Selected

Missing
Added GraceDB › Events › 4

Baseline

Missing

Selected

{'FAR': 1.277238764202069e-07, 'UID': 'G527390', 'XML': 'https://gracedb.ligo.org/api/events/G527390/files/coinc.xml', 'Pbbh': 0.9127522579079302, 'Pbns': 6.574247830493903e-17, 'H1SNR': 6.0223422, 'HasNS': 0.0, 'L1SNR': 6.0770378, 'Mass1': 50.356156, 'Mass2': 48.294952, 'Notes': [], 'Pnsbh': 4.721372304758144e-15, 'State': 'preferred', 'V1SNR': 2.7249899, 'Pastro': 0.9127522579079351, 'Skymap': 'https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits', 'Spin1z': -0.10828125, 'Spin2z': -0.10828125, 'GPSTime': 1416451772.353149, 'Pipeline': 'gstlal', 'HasMassGap': 0.0, 'HasRemnant': 0.0, 'NetworkSNR': 8.979118225123939, 'SearchType': 'low latency', 'EarlyWarning': False, 'InOfflineCatalog': False, 'SourceClassification': 'https://gracedb.ligo.org/api/events/G527390/files/gstlal.p_astro.json'}
Changed GraceDB › LastUpdate

Baseline

2025-11-19 12:01:09.486208

Selected

2025-11-27 01:38:21.494835

View raw JSON diff

Technical inspection aid only. The semantic summary above remains authoritative.

Baseline e67d888b

{"Info": {"Notes": [], "Labels": [], "SchemaVersion": "v3"}, "Sname": "S241124w", "GraceDB": {"ADVOK": true, "Events": [{"FAR": 2.480211522129784e-08, "UID": "G604367", "XML": "https://gracedb.ligo.org/api/events/G604367/files/coinc.xml", "H1SNR": 5.5423479, "HasNS": 0.0, "L1SNR": 6.394455, "Mass1": 63.178619, "Mass2": 54.729485, "Notes": [], "State": "neighbor", "Skymap": "https://gracedb.ligo.org/api/events/G604367/files/bayestar.multiorder.fits", "Spin1z": 0.04377953, "Spin2z": 0.04377953, "GPSTime": 1416451772.34668, "Pipeline": "pycbc", "HasMassGap": 0.005275362318840579, "HasRemnant": 0.0, "NetworkSNR": 8.462072708181267, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 5, "InOfflineCatalog": true}, {"FAR": 1.818458520359014e-07, "UID": "G602686", "XML": "https://gracedb.ligo.org/api/events/G602686/files/coinc.xml", "H1SNR": 5.7374415, "HasNS": 0.0, "L1SNR": 5.6206784, "Mass1": 46.318119, "Mass2": 48.294952, "Notes": [], "State": "neighbor", "Spin1z": -0.44859374, "Spin2z": -0.44859374, "GPSTime": 1416451772.354486, "Pipeline": "gstlal", "HasMassGap": 0.005275362318840579, "HasRemnant": 0.0, "NetworkSNR": 8.461329449876917, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 5, "InOfflineCatalog": true}, {"FAR": 2.215639e-07, "UID": "G612371", "XML": "https://gracedb.ligo.org/api/events/G612371/files/coinc.xml", "Pbbh": 0.483859234, "Pbns": 0.0, "H1SNR": 5.708645, "HasNS": 0.0, "L1SNR": 6.05734, "Mass1": 77.458101, "Mass2": 28.510585, "Notes": [], "Pnsbh": 0.0, "State": "neighbor", "V1SNR": 2.438482, "Pastro": 0.48385923399999997, "Skymap": "https://gracedb.ligo.org/api/events/G612371/files/bayestar.multiorder.fits", "Spin1z": -0.181499, "Spin2z": -0.181499, "GPSTime": 1416451772.344068, "Pipeline": "MBTA", "HasMassGap": 0.015682288725766987, "HasRemnant": 0.0, "NetworkSNR": 8.673303, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 5, "InOfflineCatalog": true, "SourceClassification": "https://gracedb.ligo.org/api/events/G612371/files/mbta.p_astro.json"}, {"FAR": 1.277238764202069e-07, "UID": "G527390", "XML": "https://gracedb.ligo.org/api/events/G527390/files/coinc.xml", "Pbbh": 0.9127522579079302, "Pbns": 6.574247830493903e-17, "H1SNR": 6.0223422, "HasNS": 0.0, "L1SNR": 6.0770378, "Mass1": 50.356156, "Mass2": 48.294952, "Notes": [], "Pnsbh": 4.721372304758144e-15, "State": "preferred", "V1SNR": 2.7249899, "Pastro": 0.9127522579079351, "Skymap": "https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits", "Spin1z": -0.10828125, "Spin2z": -0.10828125, "GPSTime": 1416451772.353149, "Pipeline": "gstlal", "HasMassGap": 0.0, "HasRemnant": 0.0, "NetworkSNR": 8.979118225123939, "SearchType": "low latency", "EarlyWarning": false, "InOfflineCatalog": false, "SourceClassification": "https://gracedb.ligo.org/api/events/G527390/files/gstlal.p_astro.json"}], "LastUpdate": "2025-11-19 12:01:09.486208", "Instruments": "H1,L1,V1", "SupereventFAR": 1.818458520359014e-07}, "Lensing": {"SingletAnalyses": {}, "MultipletAnalyses": {}}, "Cosmology": {"Notes": [], "Counterparts": [], "PreferredLowLatencySkymap": "https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits", "CosmologyRunsUsingThisSuperevent": []}, "TestingGR": {"Notes": [], "BHMAnalyses": [], "FTIAnalyses": [], "MDRAnalyses": [], "POLAnalyses": [], "SIMAnalyses": [], "SMAAnalyses": [], "SSBAnalyses": [], "LOSAAnalyses": [], "IMRCTAnalyses": [], "TIGERAnalyses": [], "PCATGRAnalyses": [], "PYRINGAnalyses": [], "PSEOBRDAnalyses": [], "EchoesCWBAnalyses": [], "ResidualsAnalyses": [], "ModeledEchoesAnalyses": [], "UnmodeledEchoesAnalyses": [], "QNMRationalFilterAnalyses": []}, "Publications": {"Papers": []}, "ExtremeMatter": {"Analyses": []}, "CatalogTracking": {"Notes": [], "SearchResultStatuses": [{"UID": "pycbc", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}, {"UID": "gstlal", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}, {"UID": "MBTA", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}], "ParameterEstimationStatuses": []}, "ParameterEstimation": {"Notes": [], "Status": "unstarted", "Results": [], "Analysts": [], "Reviewers": [], "SafeSamplingRate": 4096.0, "SafeLowerMassRatio": 0.05}, "RatesAndPopulations": {"RnPRunsUsingThisSuperevent": []}, "DetectorCharacterization": {"Notes": [], "Status": "unstarted", "Analysts": [], "Reviewers": [], "DQRResults": [], "RecommendedDetectors": [], "ParticipatingDetectors": []}}

Selected d8b2ae98

{"Info": {"Notes": [], "Labels": [], "SchemaVersion": "v3"}, "Sname": "S241124w", "GraceDB": {"ADVOK": true, "Events": [{"FAR": 2.480211522129784e-08, "UID": "G604367", "XML": "https://gracedb.ligo.org/api/events/G604367/files/coinc.xml", "H1SNR": 5.5423479, "HasNS": 0.0, "L1SNR": 6.394455, "Mass1": 63.178619, "Mass2": 54.729485, "Notes": [], "State": "neighbor", "Skymap": "https://gracedb.ligo.org/api/events/G604367/files/bayestar.multiorder.fits", "Spin1z": 0.04377953, "Spin2z": 0.04377953, "GPSTime": 1416451772.34668, "Pipeline": "pycbc", "HasMassGap": 0.005275362318840579, "HasRemnant": 0.0, "NetworkSNR": 8.462072708181267, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 7, "InOfflineCatalog": true}, {"FAR": 1.91824290888812e-07, "UID": "G620545", "XML": "https://gracedb.ligo.org/api/events/G620545/files/coinc.xml", "H1SNR": 5.7374415, "HasNS": 0.0, "L1SNR": 5.6206784, "Mass1": 46.318119, "Mass2": 48.294952, "Notes": [], "State": "neighbor", "Spin1z": -0.44859374, "Spin2z": -0.44859374, "GPSTime": 1416451772.354486, "Pipeline": "gstlal", "HasMassGap": 0.005275362318840579, "HasRemnant": 0.0, "NetworkSNR": 8.461329449876917, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 7, "InOfflineCatalog": true}, {"FAR": 2.215639e-07, "UID": "G612371", "XML": "https://gracedb.ligo.org/api/events/G612371/files/coinc.xml", "Pbbh": 0.483859234, "Pbns": 0.0, "H1SNR": 5.708645, "HasNS": 0.0, "L1SNR": 6.05734, "Mass1": 77.458101, "Mass2": 28.510585, "Notes": [], "Pnsbh": 0.0, "State": "neighbor", "V1SNR": 2.438482, "Pastro": 0.48385923399999997, "Skymap": "https://gracedb.ligo.org/api/events/G612371/files/bayestar.multiorder.fits", "Spin1z": -0.181499, "Spin2z": -0.181499, "GPSTime": 1416451772.344068, "Pipeline": "MBTA", "HasMassGap": 0.015682288725766987, "HasRemnant": 0.0, "NetworkSNR": 8.673303, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 7, "InOfflineCatalog": true, "SourceClassification": "https://gracedb.ligo.org/api/events/G612371/files/mbta.p_astro.json"}, {"FAR": 4.48839771e-07, "UID": "G619947", "Notes": [], "State": "neighbor", "GPSTime": 1416451772.34259, "Pipeline": "CWB", "NetworkSNR": 8.473666266734842, "SearchType": "offline", "EarlyWarning": false, "CatalogNumber": "5", "CatalogVersion": 7, "InOfflineCatalog": true}, {"FAR": 1.277238764202069e-07, "UID": "G527390", "XML": "https://gracedb.ligo.org/api/events/G527390/files/coinc.xml", "Pbbh": 0.9127522579079302, "Pbns": 6.574247830493903e-17, "H1SNR": 6.0223422, "HasNS": 0.0, "L1SNR": 6.0770378, "Mass1": 50.356156, "Mass2": 48.294952, "Notes": [], "Pnsbh": 4.721372304758144e-15, "State": "preferred", "V1SNR": 2.7249899, "Pastro": 0.9127522579079351, "Skymap": "https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits", "Spin1z": -0.10828125, "Spin2z": -0.10828125, "GPSTime": 1416451772.353149, "Pipeline": "gstlal", "HasMassGap": 0.0, "HasRemnant": 0.0, "NetworkSNR": 8.979118225123939, "SearchType": "low latency", "EarlyWarning": false, "InOfflineCatalog": false, "SourceClassification": "https://gracedb.ligo.org/api/events/G527390/files/gstlal.p_astro.json"}], "LastUpdate": "2025-11-27 01:38:21.494835", "Instruments": "H1,L1,V1", "SupereventFAR": 1.818458520359014e-07}, "Lensing": {"SingletAnalyses": {}, "MultipletAnalyses": {}}, "Cosmology": {"Notes": [], "Counterparts": [], "PreferredLowLatencySkymap": "https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits", "CosmologyRunsUsingThisSuperevent": []}, "TestingGR": {"Notes": [], "BHMAnalyses": [], "FTIAnalyses": [], "MDRAnalyses": [], "POLAnalyses": [], "SIMAnalyses": [], "SMAAnalyses": [], "SSBAnalyses": [], "LOSAAnalyses": [], "IMRCTAnalyses": [], "TIGERAnalyses": [], "PCATGRAnalyses": [], "PYRINGAnalyses": [], "PSEOBRDAnalyses": [], "EchoesCWBAnalyses": [], "ResidualsAnalyses": [], "ModeledEchoesAnalyses": [], "UnmodeledEchoesAnalyses": [], "QNMRationalFilterAnalyses": []}, "Publications": {"Papers": []}, "ExtremeMatter": {"Analyses": []}, "CatalogTracking": {"Notes": [], "SearchResultStatuses": [{"UID": "pycbc", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}, {"UID": "gstlal", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}, {"UID": "MBTA", "Chunk": 0, "Notes": [], "Finalized": false, "ReviewStatus": "unstarted"}], "ParameterEstimationStatuses": []}, "ParameterEstimation": {"Notes": [], "Status": "unstarted", "Results": [], "Analysts": [], "Reviewers": [], "SafeSamplingRate": 4096.0, "SafeLowerMassRatio": 0.05}, "RatesAndPopulations": {"RnPRunsUsingThisSuperevent": []}, "DetectorCharacterization": {"Notes": [], "Status": "unstarted", "Analysts": [], "Reviewers": [], "DQRResults": [], "RecommendedDetectors": [], "ParticipatingDetectors": []}}

Metadata for selected version

Viewing historical metadata — not the current record

Summary

No summary highlights available.

Info

Notes: Empty list
Labels: Empty list
SchemaVersion: v3

GraceDB

ADVOK

✓ True

Events

Item 1

FAR: 2.480211522129784e-08
UID: G604367
XML: https://gracedb.ligo.org/api/events/G604367/files/coinc.xml
H1SNR: 5.5423479
HasNS: 0.0
L1SNR: 6.394455
Mass1: 63.178619
Mass2: 54.729485
Notes: Empty list
State: neighbor
Skymap: https://gracedb.ligo.org/api/events/G604367/files/bayestar.multiorder.fits
Spin1z: 0.04377953
Spin2z: 0.04377953
GPSTime: 1416451772.34668
Pipeline: pycbc
HasMassGap: 0.005275362318840579
HasRemnant: 0.0
NetworkSNR: 8.462072708181267
SearchType: offline
EarlyWarning: ✗ False
CatalogNumber: 5
CatalogVersion: 7
InOfflineCatalog: ✓ True

Item 2

FAR: 1.91824290888812e-07
UID: G620545
XML: https://gracedb.ligo.org/api/events/G620545/files/coinc.xml
H1SNR: 5.7374415
HasNS: 0.0
L1SNR: 5.6206784
Mass1: 46.318119
Mass2: 48.294952
Notes: Empty list
State: neighbor
Spin1z: -0.44859374
Spin2z: -0.44859374
GPSTime: 1416451772.354486
Pipeline: gstlal
HasMassGap: 0.005275362318840579
HasRemnant: 0.0
NetworkSNR: 8.461329449876917
SearchType: offline
EarlyWarning: ✗ False
CatalogNumber: 5
CatalogVersion: 7
InOfflineCatalog: ✓ True

Item 3

FAR: 2.215639e-07
UID: G612371
XML: https://gracedb.ligo.org/api/events/G612371/files/coinc.xml
Pbbh: 0.483859234
Pbns: 0.0
H1SNR: 5.708645
HasNS: 0.0
L1SNR: 6.05734
Mass1: 77.458101
Mass2: 28.510585
Notes: Empty list
Pnsbh: 0.0
State: neighbor
V1SNR: 2.438482
Pastro: 0.48385923399999997
Skymap: https://gracedb.ligo.org/api/events/G612371/files/bayestar.multiorder.fits
Spin1z: -0.181499
Spin2z: -0.181499
GPSTime: 1416451772.344068
Pipeline: MBTA
HasMassGap: 0.015682288725766987
HasRemnant: 0.0
NetworkSNR: 8.673303
SearchType: offline
EarlyWarning: ✗ False
CatalogNumber: 5
CatalogVersion: 7
InOfflineCatalog: ✓ True
SourceClassification: https://gracedb.ligo.org/api/events/G612371/files/mbta.p_astro.json

Item 4

FAR: 4.48839771e-07
UID: G619947
Notes: Empty list
State: neighbor
GPSTime: 1416451772.34259
Pipeline: CWB
NetworkSNR: 8.473666266734842
SearchType: offline
EarlyWarning: ✗ False
CatalogNumber: 5
CatalogVersion: 7
InOfflineCatalog: ✓ True

Item 5

FAR: 1.277238764202069e-07
UID: G527390
XML: https://gracedb.ligo.org/api/events/G527390/files/coinc.xml
Pbbh: 0.9127522579079302
Pbns: 6.574247830493903e-17
H1SNR: 6.0223422
HasNS: 0.0
L1SNR: 6.0770378
Mass1: 50.356156
Mass2: 48.294952
Notes: Empty list
Pnsbh: 4.721372304758144e-15
State: preferred
V1SNR: 2.7249899
Pastro: 0.9127522579079351
Skymap: https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits
Spin1z: -0.10828125
Spin2z: -0.10828125
GPSTime: 1416451772.353149
Pipeline: gstlal
HasMassGap: 0.0
HasRemnant: 0.0
NetworkSNR: 8.979118225123939
SearchType: low latency
EarlyWarning: ✗ False
InOfflineCatalog: ✗ False
SourceClassification: https://gracedb.ligo.org/api/events/G527390/files/gstlal.p_astro.json

LastUpdate

2025-11-27 01:38:21.494835

Instruments

H1,L1,V1

SupereventFAR

1.818458520359014e-07

Parameter estimation (PE)

Notes: Empty list
Status: unstarted
Results: Empty list
Analysts: Empty list
Reviewers: Empty list
SafeSamplingRate: 4096.0
SafeLowerMassRatio: 0.05

Lensing

Detector characterisation (Detchar)

Notes: Empty list
Status: unstarted
Analysts: Empty list
Reviewers: Empty list
DQRResults: Empty list
RecommendedDetectors: Empty list
ParticipatingDetectors: Empty list

Extreme matter

Cosmology

Notes: Empty list
Counterparts: Empty list
PreferredLowLatencySkymap: https://gracedb.ligo.org/api/events/G527390/files/bayestar.multiorder.fits
CosmologyRunsUsingThisSuperevent: Empty list

Catalogue tracking

Notes

Empty list

SearchResultStatuses

Item 1

UID: pycbc
Chunk: 0
Notes: Empty list
Finalized: ✗ False
ReviewStatus: unstarted

Item 2

UID: gstlal
Chunk: 0
Notes: Empty list
Finalized: ✗ False
ReviewStatus: unstarted

Item 3

UID: MBTA
Chunk: 0
Notes: Empty list
Finalized: ✗ False
ReviewStatus: unstarted

ParameterEstimationStatuses

Empty list

Publications

Additional metadata: Sname

Sname: S241124w

S241124w

History

Version history

Selected version details

Changes from previous version e67d888b to selected version d8b2ae98

Baseline e67d888b

Selected d8b2ae98

Metadata for selected version

Summary

Info

GraceDB

Parameter estimation (PE)

Lensing

Detector characterisation (Detchar)

Extreme matter

Cosmology

Catalogue tracking

Publications

Additional metadata: Sname

Additional metadata: TestingGR

Additional metadata: RatesAndPopulations

S241124w Copy superevent ID Show full identifier S241124w

History

Version history

Selected version details

Changes from previous version e67d888b to selected version d8b2ae98

Baseline e67d888b

Selected d8b2ae98

Metadata for selected version

Summary

Info

All remaining fields

GraceDB

All remaining fields

Parameter estimation (PE)

All remaining fields

Lensing

Detector characterisation (Detchar)

All remaining fields

Extreme matter

Cosmology

All remaining fields

Catalogue tracking

All remaining fields

Publications

Additional metadata: Sname

All remaining fields

Additional metadata: TestingGR

Additional metadata: RatesAndPopulations

S241124w