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.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
26 results found.
- GRB 210708A: Swift/UVOT Upper Limits
- IceCube 201114A: Swift followup of Fermi J0703.5+0505
- IceCube-190221A: Swift-XRT Follow-up Observations
- GRB 180705A: OSN observations
- Trigger 809217: Swift trigger on RS CVn Star HD 8357
- IceCube-171106A: Swift Observations
- IceCube-170922A: Swift-XRT observations
- LIGO/Virgo G299232: Swift-XRT sources
- Global MASTER net follow up of IceCube-160731A
- Swift follow up of IceCube-160731A
- GRB 151122A: Swift/UVOT Observations
- GRB 151122A: Swift-XRT observations
- GRB 151107A: Further investigation of the source nature
- LIGO/Virgo G184098: Swift follow-up observations
- Swift observations of HD 305560
- Swift possible detection of the Be star HD 305560
- Swift-BAT trigger 582894 is HR 1099 (Flare star)
- GRB 120510A: Swift XRT and UVOT observations
- GRB 120212A: Swift/UVOT Detection
- GRB 100614A: Swift/UVOT Upper Limits
- GRB080506: Swift/UVOT observations
- GRB 051008 Tautenburg Supernova Search
- GRB051105B: Swift/XRT upper limit
- GRB 050713A: Swift/UVOT observation
- Possible GRB 040903 - further analysis
- GRB 021023: Curious K-band Source(s) Just Outside of IPN Localization