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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"

26483 results found.

  1. GRB 980613: Optical transient and its host galaxy
  2. GRB 980613: Detection of the probable host galaxy
  3. GRB 980613: BATSE Observations
  4. SGR1627-41, BeppoSAX-GRBM detections
  5. SGR 1627-41
  6. GRB 980613 optical observations
  7. GRB980613 Optical Observations
  8. GRB980613 observations from Palomar
  9. GRB980613 BeppoSAX-NFI follow up
  10. GRB 980613 new optical/IR observations
  11. GRB 980613 optical/IR obs.
  12. GRB980611
  13. GRB980613, BeppoSAX WFC positions
  14. GRB971214 Secondary Standards
  15. SGR 1900+14
  16. GRB980519 Secondary Standards
  17. SGR1900+14
  18. GRB 980519 Optical Observations
  19. GRB980519 optical observations
  20. GRB980519 I-band observations
  21. GRB 980519
  22. GRB980519 optical observations
  23. GRB980519 BATSE Observations
  24. GRB970519, optical follow-up at Schmidt Calern
  25. GRB980519 optical observations
  26. GRB980519 Optical Observations
  27. GRB980519 Optical Observations
  28. GRB980519 IPN POSITION
  29. GRB980519 Optical Observations
  30. GRB 980519 Optical Observations
  31. GRB980519 optical observations
  32. GRB980515, BeppoSAX IAUC to be submitted
  33. GRB980519, BeppoSAX-WFC updated position
  34. GRB980519, BeppoSAX-WFC position
  35. BeppoSAX GRB ALERT: updated position of grb980515
  36. GRB 980425 Radio Light Curve
  37. GRB980425 BATSE observations
  38. GRB980425: optical obs.
  39. GRB980425: Radio Observations
  40. GRB 980425 optical observations
  41. report on BSAX observations of GRB980425
  42. GRB 980425 optical observations
  43. GRB980326, optical observations
  44. GRB980326, optical observations
  45. GRB980329, Fading IR counterpart to radio source
  46. GRB980326 IPN annulus
  47. GRB980329 Keck K-band observations
  48. GRB980329 sub-millimeter observations
  49. GRB980329 IPN annulus
  50. GRB980329 optical observations
  51. GRB980329 near-IR observations
  52. GRB980329 near-IR observations
  53. GRB980329 infrared observations
  54. GRB980329 optical observations
  55. GRB980326 optical observations
  56. GRB980329 optical observations
  57. GRB980329 optical observations
  58. GRB980329 optical observations
  59. GRB980326 optical observations
  60. GRB970508 SAO RAS optical observations
  61. Optical Observations of GRB 970508
  62. GRB 971214: Redshift from Keck Observations
  63. Near-IR follow-up on GRB 971227
  64. GRB971214: Keck R & I-band Observations
  65. GRB 971227: Optical Observations
  66. Optical Observations of the GRB 971227 field
  67. Optical Observations on GRB 971227
  68. GRB971227: Plaskett R-band observations
  69. GRB 971227: Optical clarifications
  70. GRB971227: Further CAHA R-band images
  71. GRB971227: LOTIS observations
  72. GRB 971227: CAHA R-band images
  73. GRB971214: Optical Observations and Calibrations
  74. GRB 971214: Apache Point Observatory Optical Observations
  75. GRB 971214: KPNO Optical Observations
  76. Optical Observations of GRB 971214 at Keck
  77. GRB 971214: Optical Observations
  78. Radio Observations of GRB 971214 at the VLA
  79. GRB 971024: Refined analysis by USNOFS Observations
  80. GRB 970925: BATSE Localization
  81. IRAS 18119-1342 and the possible new SGR
  82. RXTE Observations of SGR 1814-13
  83. GRB 970828: Palomar Observations

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