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').
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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.
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subject:"Swift"body:"GRB"submitter:"Judith Racusin"865 results found.
- GRB060213: Swift XRT observations and possible afterglow candidate
- GRB060204a: Swift XRT Detection of an Afterglow Candidate
- Swift XRT Observation of GRB 060204C
- GRB060203: Swift XRT Team Refined Analysis
- An extraordinary long burst on December 3 from SGR1806-20
- Possible resuming of the SGR 1806-20 activity
- GRB050925: analysis of the XMM-Newton observation
- GRB/SGR 050925: XMM-Newton ToO observation
- GRB051103: MASTER: OT limit and host galaxy candidates
- IPN triangulation and Konus spectrum of the bright short/hard GRB051103
- SGR 1806-20: continued moderate activity seen with INTEGRAL
- GRB/SGR 050925: IR Observations
- GRB050925: Swift-BAT detection of a short burst
- Possible GRB 050922 detected by INTEGRAL
- GRB 050906: Swift-BAT refined analysis
- GRB 050906: Bright galaxy in BAT error box
- Ongoing activity of SGR 1806-20: an intermediate burst 050811
- Detection of an intermediate burst from SGR 1806-20 on August 8
- GRB 050716: Refined XRT analysis.
- H11603: An X-ray flare from V4641 Sgr, or a possible XRF
- Konus-Wind observation of an intermediate burst from SGR 1806-20
- GRB 050509B: Swift/XRT refined analysis
- Renewal of SGR 1806-20 activity
- GRB 050502 - A long GRB detected with INTEGRAL
- Ongoing activity of SGR 1806-20 after the giant flare
- SGR 1806-20: GMRT results at 240 MHz band.
- SGR 1806-20: low frequency GMRT results of 2005 Jan 16.
- SGR 1806-20: RXTE/PCA pulse frequency during flare
- SGR 1806-20: Further VLA Observations
- SGR 1806-20: Further low frequency GMRT results
- SGR 1806-20: Further VLA Observations
- SGR1806: Optical Transient Candidates in SOHO/LASCO Images
- Further VLA observations of SGR 1806-20
- SGR 1806-20 and extragalactic short-duration GRBs
- Further ATCA observations of SGR 1806-20
- Fourth Epoch VLA observations of SGR 1806-20
- SGR 1806-20: Low frequency GMRT results; submission to GCN circulars
- SGR 1806-20: Temporal and Spectral behavior of radio transient
- ATCA observations of SGR 1806-20
- SGR 1806-20, RHESSI observations of the 041227 giant flare
- Third epoch observations of SGR 1806-20 with VLA
- Second Epoch VLA observations of SGR 1806-20
- Second-epoch VLA observations of SGR 1806-20
- SGR1806: Detection of a Sudden Ionospheric Disturbance
- DETECTION OF POLARIZATION OF THE RADIO EMISSION FROM SGR 1806-20
- VLA observations of SGR 1806-20
- SGR1806 VLA Observations
- VLA observations of SGR 1806-20
- SGR1806-20: RXTE-PCA observation of the 041227 super-flare
- Detection of the SGR 1806-20 giant outburst back-scattered by the
- The giant outburst from SGR 1806-20
- Giant flare from SGR 1806-20 detected by INTEGRAL
- Very high activity of SGR 1806-20
- GRB041220: Swift-BAT burst
- Swift-BAT detection of the bright long burst GRB041219
- GRB 041219 - A long GRB detected by INTEGRAL
- Summary of the recent bursts from SGR 1806-20
- IBAS GRB Alert # 2034
- Bright bursts from SGR1806-20
- Konus-Wind observation of a series SGR 1806-20 bursts on 041005
- Bursts from SGR 1806-20: Preliminary INTEGRAL results
- Very strong outburst from SGR 1806-20 detected with INTEGRAL
- SGR 1806-20 still active
- An intense burst from SGR1806-20
- Very bright burst detected from SGR 1806-20
- XMM-Newton Images of GRB 040827
- Increase of SGR 1806-20 activity
- Bursting activity from SGR 1806-20 detected with IBAS
- Ongoing activity of SGR 1806-20
- XRF040701: Second-Epoch Chandra Observations
- XRF040701: First-Epoch Chandra Observations
- GRB040706:observation at University of Miyazaki
- SGR 1806-20: no IR variability of the proposed counterparts
- SGR 1806-20, potential NIR counterpart
- Activivty of SGR 1806-20
- IBAS GRB Alerts n.1785 to 1791
- GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
- Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
- IBAS GRB Alert 1694
- IBAS GRB alerts 1679, 1680, 1681
- IBAS results on a burst from SGR1806-20
- IBAS alert 1180 refers to a burst from SGR 1806-20
- Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
- SGR1806-20 bursts on 031008. Helicon detection and small error box.
- SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
- A burst from SGR 1806-20 detected with IBAS
- IPN triangulation of GRB030926 (short/hard; large error box)
- IBAS detection of bursts from SGR 1806-20
- Radio Observations of SGR1806-20
- INTEGRAL ToO OBSERVATIONS OF SGR1806-20: CALL FOR CORRELATED OBSERVATIONS
- Summary of recent IPN and HETE detections of SGR bursts
- Clarification of GCN 2354 on SGR1806-20
- IPN detection of continued activity from SGR1806-20
- 030813 SGR event (Konus-Wind observation)
- SGR 1808-20 (=H2802): A Possible new SGR
- SGR 1806-20, submm observations
- RXTE PCA Observations of SGR1806-20 Region
- GRBlog: Compilation of all GCN Circ. data
- IPN detection of renewed activity from SGR1806-20
- HETE detection of burst from SGR1806-20