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').
578 results found.
- 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
- HETE detection of burst from SGR1806-20
- GRB030329 observed as a sudden ionospheric disturbance (SID)
- IPN triangulation of GRB021219
- IPN detection of continued activity from SGR1806-20
- IPN detection of renewed activity from SGR1806-20
- IPN detection of continued SGR1900+14 activity
- IPN confirmation of the reactivation of SGR1900+14
- IPN detection of possible reactivation of SGR1900+14
- IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
- SGR1900+14 activity, November 2-4, 2002
- Detection of activity from SGR 1900+14 with the RXTE/PCA
- IPN detection of a burst from SGR1900+14
- Gemini IR Detection of AXP 1E 2259+586 Post-Burst
- SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
- AXP 1E2259+586: quasi-simultaneous optical observation
- AXP 1E2259+586 optical observations
- SGR-like Bursts from the AXP 1E 2259+586
- IPN detection of possible bursts from SGR1806-20
- XRF 020427: Sudden Ionospheric Disturbance (SID)
- Mars Odyssey joins the IPN
- IPN detection and localization of Cygnus X-1 flares
- RXTE Observations of SGR 1900+14
- SGR1900+14 activity
- IPN/HETE Detection of Bursts from SGR1900+14
- IPN detection of further activity from SGR1806-20
- Optical observation of SGR 1806-20 at the 6-m SAO telescope
- Probable SGR or Short Duration GRB Detected by HETE
- Dramatic Increase in the Rate of X-ray Bursts Reported by HETE
- Possible burst from SGR1806-20
- IPN detection of SGR1900+14
- X-ray precursors to the large flare from SGR 1900+14
- SGR 1900+14: No evidence of extended X-ray emission
- SGR 1900+14 : RXTE observations
- BeppoSAX/NFI Follow-up Observation of SGR 1900+14
- SGR1900+14
- SGR 1900+14: Correction to GCN 1049
- Millimeter observation of SGR 1900+14
- SGR 1900+14: Detection of extended X-ray emission
- Chandra Observations of SGR 1900+14
- SGR 1900+14, Chandra observations
- Chandra Observations of SGR 1900+14
- SGR1900+14, I-band observations
- SGR 1806-20 burst activity
- BATSE GRB trigger criteria
- X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
- GRB990308 not a new SGR
- GRB990308, Possible new SGR~0209+70
- SGR1900+14, BeppoSAX-GRBM observations
- SGR1627-41
- SGR1627-41, RXTE/ASM observations
- Reduced error box of SGR 1627-41
- SGR 1627-41
- Discovery of a new SGR source, SGR1627-41
- SGR 1900+14
- SGR1900+14
- SGR1900+14
- BATSE on-board GRB trigger change
- Untitled
- Possible new SGR from US Naval Observatory
- RXTE Observations of SGR 1814-13