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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.

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').
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"

18468 results found.

  1. GRB 981226 optical observations
  2. GRB 981220:Optical Observations
  3. GRB981226, BeppoSAX Christmas GRB
  4. GRB 981226 optical observations
  5. GRB 981220, radio observations
  6. GRB 981220
  7. GRB 980326/Host Galaxy
  8. BeppoSAX NFI Observation of GRB980425
  9. GRB980329 R,I flux calibration and R,I,K upper limits
  10. GRB980425 Optical Follow-up
  11. GRB970508 optical observations
  12. GRB980519, Optical Observations
  13. GRB980703 optical photometry
  14. GRB980703 optical observations
  15. GRB980703 Transient Optical Follow-Up
  16. GRB980703: LOTIS observation at early times
  17. BeppoSAX NFI observations of GRB 980703
  18. GRB 980703: ASM Position & Intensity
  19. GRB980703 optical followup
  20. Radio observations of SGRs
  21. SGR1900+14 field optical observations
  22. GRB 980613: Optical transient and its host galaxy
  23. GRB 980613: Detection of the probable host galaxy
  24. GRB 980613 Optical Observations
  25. GRB 980613 optical observations
  26. Discovery of a new SGR source, SGR1627-41
  27. GRB980613 Optical Observations
  28. GRB980613 observations from Palomar
  29. GRB980613 BeppoSAX-NFI follow up
  30. GRB980613 Near Infra-Red Observations
  31. GRB971214 Secondary Standards
  32. GRB980519 Secondary Standards
  33. GRB 980519 Optical Observations
  34. GRB 980519
  35. GRB980519 optical observations
  36. GRB 980519 Optical Observations
  37. GRB970519, optical follow-up at Schmidt Calern
  38. GRB980519 Optical Observations
  39. GRB 980519 Optical Observations
  40. GRB980515, BeppoSAX IAUC to be submitted
  41. BSAX Observations of GRB980425 field
  42. SAX J0840.7+2248 Optical Observations
  43. GRB980425: optical obs.
  44. GRB980425: Radio Observations
  45. report on BSAX observations of GRB980425
  46. GRB 980329 ROSAT observation
  47. GRB980326 X-ray Observations
  48. GRB980326, optical observations
  49. GRB980326, optical observations
  50. GRB980329 Keck K-band observations
  51. GRB980326 optical observations
  52. GRB980329 optical observations
  53. GRB980329 VLA observations
  54. GRB980329 optical observations
  55. GRB980326 optical observations
  56. Optical Observations of GRB 970508
  57. Near-IR follow-up on GRB 971227
  58. Optical Observations of the GRB 971227 field
  59. Optical Observations on GRB 971227
  60. GRB971227: Plaskett R-band observations
  61. GRB 971227: Optical clarifications
  62. GRB971227: Further CAHA R-band images
  63. GRB971227: LOTIS observations
  64. GRB971214: Optical Observations and Calibrations
  65. GRB 971214: Optical Observations
  66. Radio Observations of GRB 971214 at the VLA
  67. GRB 971024: KPNO Optical Observations
  68. GRB 970828: Palomar Observations

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