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').
18174 results found.
- GRB 050801, afterglow observations
- GRB 050730, corrected photometry and break?
- GRB 050801: ROTSE-III Early Afterglow Break
- GRB050801: Swift-BAT detection of a burst
- GRB050801: GCN XRT position is incorrect
- GRB 050801: ROTSE-III Detection of Possible Counterpart
- GRB 050730: XRT refined analysis
- GRB 050730: early TAROT optical observations
- Swift/UVOT photometry of GRB050730
- GRB050730: Refined BAT analysis of the Swift-BAT burst
- GRB 050730: Swift XRT afterglow observations
- GRB 050730 XMM-Newton observation
- GRB050730, afterglow observations
- GRB 050730: Redshift Measurement based on Magellan/MIKE Observations
- GRB050730: Liverpool Telescope optical observations
- GRB 050730, optical candidate
- GRB050730: Swift-BAT detection of a weak burst
- GRB 050713A: Swift XRT extended light curve
- GRB050726: Swift UVOT observations
- GRB 050724: Chandra Observations of the X-ray Afterglow
- GRB050713: analysis of the XMM-Newton observation
- Swift-BAT trigger 147918 is not a real GRB
- GRB 050727: RTT150 optical observations
- GRB050727: KAIT optical limit
- GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
- GRB 050726: early Swift XRT analysis results
- GRB050726: Swift-BAT detection of a weak burst
- GRB 050724: SWIFT XRT refined position
- GRB 050724: optical and near-IR observations
- GRB 050724: Swift/UVOT Upper Limit
- GRB 050724: early Swift XRT analysis results
- GRB050724: Refined analysis of the Swift-BAT possible short burst
- GRB050724: a short-burst detected by Swift
- Swift-BAT trigger 147325 is not due to a real GRB
- GRB050723: XRT distributed coordinates are not related to the burst
- GRB 050721A: Swift-BAT refined analysis
- GRB 050721A: Early Swift XRT analysis results
- Swift BAT Trigger 146986 is SWIFT J1753.5-0127
- GRB 050721a: Optical Observations
- GRB050721A: Swift-BAT detection of a weak burst
- GRB 050714a: Refined XRT analysis and afterglow confirmation
- Swift-BAT trigger 146731 is not a real GRB
- Swift-BAT detection of a possible GRB
- GRB050717
- Konus-Wind observation of GRB 050717
- Swift/UVOT Observations of GRB 050717
- GRB 050717: Swift-BAT refined analysis
- GRB 050717: Refined XRT analysis.
- GRB050712: optical limits
- GRB050717: Swift XRT position
- Swift detection of GRB 050717
- GRB 050716 - UKIRT identification of candidate afterglow
- Swift UVOT Observations of GRB 050716
- GRB 050716: Refined XRT analysis.
- GRB050716: Refined analysis of the Swift-BAT burst
- GRB050716, optical observation
- GRB050716: Faulkes North Telescope observation
- GRB050716: Correction to sign in XRT coordinate
- Swift/BAT detection of GRB 050716
- GRB050715: Refined analysis of the Swift-BAT burst
- GRB 050715: Swift-BAT detection
- Swift UVOT Observations of GRB 050714B
- Konus-Wind observation of GRB 050713A
- GRB 050714B: refined XRT analysis
- GRB050714B: Refined analysis of the Swift-BAT burst
- Swift detection of a long transient (GRB 050714B?)
- GRB 050714: Swift XRT afterglow position
- GRB 050713A: XRT refined analysis
- GRB 050713A: RAPTOR detection of early optical emission
- GRB050713B :Swift/UVOT observations
- GRB050713b: XRT refined analysis
- GRB 050713B: Swift-BAT Refined Analysis
- Swift-BAT Trigger 145729 is not a GRB
- GRB 050713A: Swift/UVOT observation
- GRB 050713A : Swift-BAT Refined Analysis
- GRB050712: Swift UVOT Observation of Afterglow Emission
- GRB 050713A XMM-Newton observation
- GRB050713B: Faulkes North Telescope observation
- RBO RI observations of GRB 050713A
- GRB 050713B
- GRB050713: Liverpool Telescope prompt observations
- GRB050709: Candidate X-ray Afterglow from Chandra
- GRB 050713, R-band observations at NOT
- GRB 050713: Swift detection of Bright Burst
- GRB 050713A: ROTSE-III Optical Limits
- GRB050712: XRT refined analysis
- GRB 050709: Swift UVOT and XRT observations
- GRB 050712: Swift-BAT Refined Analysis
- GRB050712: UVOT candidate optical counterpart
- GRB 050712: Swift XRT afterglow position
- GRB 050712: Swift detection of a weak burst
- GRB 050525a: ARC 3.5-meter Optical and NIR Observations
- GRB 050626: Swift XRT observations
- GRB 050701
- GRB 050701, optical observations
- GRB 050701: Refined XRT analysis
- Swift UVOT observations of GRB 050701
- GRB050701: Swift-BAT Refined analysis
- GRB 050701: Swift XRT afterglow position
- Swift trigger 143708 is really GRB 050701