GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"19666 results found.
- GRB 180706A: OSN detection
- GRB 180720C: Enhanced Swift-XRT position
- GCN 22984 was for GRB 180720B
- GRB 180720B: OSN detection, fading slower?
- GRB 180720B: Swift-XRT refined Analysis
- GRB 180720C: Swift detection of a burst or possible Galactic Transient
- GRB 180720B: Fermi GBM observation
- GRB 180720B : Fermi-LAT detection
- GRB 180715A: MASTER optical observation
- GRB 180720B: Kanata 1.5m optical/NIR observation
- GRB 180720B: LCO Haleakala possible bright optical candidate
- Correction: Swift trigger #848890 is GRB 180720B (not GRB 180720A)
- GRB 180720B: Swift detection of a burst
- GRB 180718A: MASTER optical observation
- GRB 180715A: Gemini imaging upper limits
- GRB 180715A: Swift/UVOT Upper Limits
- Swift detects a flare from AX 1631.9-4752
- GRB 180718A: Swift ToO observations
- GRB 180718B: Swift ToO observations
- GRB 180718B: Fermi-LAT detection
- GRB 180718A: Fermi GBM detection
- GRB 180718A short GRB detected by IPN and found in ground analysis of BAT data
- Swift Trigger 848621 is not an astrophysical event
- Trigger 848584: Swift detection of AX 1631.9-4752
- GRB 180715A: CALET Gamma-Ray Burst Monitor detection
- GRB 180715A: Swift-XRT observations
- GRB 180715A: Fermi GBM detection
- GRB 180715A: Swift-BAT refined analysis
- GRB 180715A: GOTO optical limits
- GRB 180715A: LCO Sutherland possible optical candidate
- GRB 180715A: Swift-XRT observations
- GRB 180715A: Swift detection of a short hard burst
- IceCube-171106A: MASTER optical observation
- GRB 180703A: optical afterglow confirmation
- Swift Trigger 847216: misidentification of IGR J16385-2057
- GRB 180709A: BOOTES-5/JGT optical observations
- GRB 180709A: Swift-BAT refined analysis
- GRB 180709A: Swift/UVOT Upper Limits
- GRB 180709A: Swift-XRT refined Analysis
- GRB 180709A: Optical limits
- GRB 180709A: Enhanced Swift-XRT position
- GRB 180703A: Swift-XRT afterglow detection
- GRB 180709A: Swift detection of a burst
- GRB 180705A: RTT150 optical upper limit
- Trigger 846740: Swift trigger near NGC5055
- IPN Triangulation of GRB 180703A
- GRB 180706A: Swift/UVOT Detection
- GRB 180706A: Swift-BAT refined analysis
- GRB 180705A: Swift-XRT refined Analysis
- GRB 180706A: Fermi GBM observation
- Konus-Wind observation of GRB 180704A
- GRB 180706A: Swift-XRT refined Analysis
- GRB 180706A: Enhanced Swift-XRT position
- GRB 180705A: TSHAO optical upper limit
- GRB 180705A: Swift/UVOT Upper Limits
- GRB 180705A: RATIR Optical Observations
- GRB 180706A: Swift detection of a burst with optical counterpart
- IPN Triangulation of GRB 180703B
- GRB 180705A: Swift-BAT refined analysis
- GRB 180705A: Enhanced Swift-XRT position
- GRB 180705A: MASTER optical observation
- GRB 180705A: Swift-XRT observations
- GRB 180705A: Swift detection of a burst
- GRB 180704A: AstroSat CZTI detection
- GRB 180703A: AstroSat CZTI detection
- GRB 180703A: Swift/UVOT Upper Limits
- GRB 180704A: Swift-XRT refined Analysis
- GRB 180704A: Swift-BAT refined analysis
- GRB 180704A: Swift/UVOT Upper Limits
- GRB 180703A: LCO Sutherland possible optical candidate
- GRB 180703A: Swift-XRT observations
- GRB 180704A: Enhanced Swift-XRT position
- GRB150101B: INTEGRAL prompt gamma-ray signal from a possible GRB170817A-analogue
- GRB 180704A: Swift-XRT observations
- GRB 180704A: MASTER optical observation
- GRB 180704A: Swift detection of a burst
- GRB 180703B: Fermi-LAT detection
- GRB 180703A: Fermi-LAT detection
- GRB 180703A: Tiled Swift observations
- GRB 180630A: Swift/UVOT Detection
- GRB 180630A: Swift-BAT refined analysis
- GRB 180630A: Swift-XRT refined Analysis
- GRB 180630A: Fermi GBM detection
- GRB 180630A: Enhanced Swift-XRT position
- GRB 180630A: Swift detection of a burst with an optical counterpart
- Konus-Wind observation of GRB 180626A
- IPN Triangulation of GRB 180626C (short)
- IPN Triangulation of GRB 180626B (short)
- GRB 180626A: Swift-BAT refined analysis
- GRB 180626A: KAIT Optical Upper Limit
- GRB 180626A: Swift-XRT refined Analysis
- GRB 180624A: LCO Haleakala observations
- GRB 180626A: Swift/UVOT Detection
- Konus-Wind observation of GRB 180623A
- GRB 180626A: LCO Haleakala observations
- GRB 180626A: ISON-MN optical observations
- GRB 180626A: Enhanced Swift-XRT position
- GRB 180626A: A long GRB detected by INTEGRAL
- GRB 180626A: Swift detection of a burst with an optical counterpart
- GRB 180624A: Swift-BAT refined analysis