GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
44 results found.
- LIGO/Virgo S230520ae: Global MASTER-Net observations report
- GRB 230510A: Swift detection of a burst
- GRB 220427A: Swift detection of a burst with an optical counterpart
- Swift trigger 1073821: detection of IGR J16418-4532
- Fermi GRB 200604A: Global MASTER-Net observations report
- Swift Trigger 863053 is not an astrophysical event
- Swift detects a flare from AX 1631.9-4752
- Swift Trigger 847216: misidentification of IGR J16385-2057
- Swift trigger 773082 is probably not astrophysical
- Swift Trigger 727422 is not an astrophysical event.
- Swift 650221/IGR J00291+5934: Liverpool Telescope observations
- IGR J00291+5934, Swift-BAT refined analysis
- Swift Trigger 650221 / IGR J00291+5934: MASTER-IAC OT observations
- Trigger 650221: Swift detection of a IGR J00291+5934
- Swift IGR J00291+5934: MASTER Optical flare detection
- IGR J00291+5934: Swift-BAT refined analysis
- Trigger 650140: Swift detection of IGR J00291+5934
- Swift J0045.2+4151: analysis of XMM-Newton archival data
- Trigger 614903: Swift detection of IGR J17544-2619
- Swift Trigger 609694 is probably not an astrophysical source
- Swift detection of SFXT IGR J17544-2619
- Trigger 599041: Swift detection of SFXT IGR J16479-4514
- Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
- Swift detection of IGR J18245-2452
- Swift Trigger 530441 is a false trigger
- Swift-BAT trigger 529813 is due to noise while entering the SAA
- Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
- Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
- Swift detection of IGR J17062-6143
- Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
- Swift detection of 4U 1630-47
- Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
- Swift-BAT trigger 431582 likely is IGR J17464-2811
- Swift detection of outburst from the SFXT IGR J18410-0535
- Trigger 371210: Swift/BAT Triggered on IGR J17511-3057
- Trigger 324561: IGR J08408-4503 detected by Swift
- Refined analysis of Swift Trigger 316063, is IGR J08408-4503
- Trigger 316063: Swift detection of a transient
- IBAS Alert n. 5257 : not a GRB
- Swift-BAT trigger 306829 is IGR J16479-4514
- IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
- Swift detection of IGR J17497-2821 (trigger 230504)
- Swift Trigger #152652 is not a GRB
- 030331 NOT A GRB