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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"

19684 results found.

  1. GRB 990123: New Optical Observations, Decay Measure
  2. GRB 990123 Optical Follow-Up
  3. GRB 990123: Possible Gravitationally Lensed Burst?
  4. GRB990123, optical observation
  5. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  6. GRB 990123 r-band photometry
  7. GRB 990123 Optical Follow-up
  8. Optical Observations of GRB 981220
  9. GRB 981226: radio variable
  10. GRB 981226 Optical Observations
  11. GRB981226 BeppoSAX follow up
  12. GRB 981226
  13. GRB 981226 optical observations
  14. GRB 981220:Optical Observations
  15. GRB981226, BeppoSAX Christmas GRB
  16. GRB 981226 optical observations
  17. GRB 981220, radio observations
  18. GRB 981220
  19. GRB 980326/Host Galaxy
  20. BeppoSAX NFI Observation of GRB980425
  21. GRB980329 R,I flux calibration and R,I,K upper limits
  22. GRB980425 Optical Follow-up
  23. GRB970508 optical observations
  24. GRB980519, Optical Observations
  25. GRB 980703 (NFI observations)
  26. GRB980703 optical photometry
  27. GRB980703 optical observations
  28. GRB980703: Radio transient
  29. GRB980703 Transient Optical Follow-Up
  30. GRB980703: LOTIS observation at early times
  31. BeppoSAX NFI observations of GRB 980703
  32. GRB980703 optical followup
  33. SGR1627-41
  34. Radio observations of SGRs
  35. SGR1900+14 field optical observations
  36. GRB 980613 Near-IR observations
  37. GRB 980613: Optical transient and its host galaxy
  38. SGR1627-41, Refined IPN annulus location
  39. GRB 980613: Detection of the probable host galaxy
  40. SGR 1627-41
  41. GRB 980613 Optical Observations
  42. GRB 980613 optical observations
  43. Discovery of a new SGR source, SGR1627-41
  44. GRB980613 Optical Observations
  45. GRB980613 observations from Palomar
  46. GRB980613 Near Infra-Red Observations
  47. GRB971214 Secondary Standards
  48. GRB980519 Secondary Standards
  49. GRB 980519 Optical Observations
  50. GRB 980519
  51. GRB980519 optical observations
  52. GRB 980519 Optical Observations
  53. GRB980519 Optical Observations
  54. GRB 980519 Optical Observations
  55. GRB980515, BeppoSAX IAUC to be submitted
  56. BSAX Observations of GRB980425 field
  57. SAX J0840.7+2248 Optical Observations
  58. GRB980425: optical obs.
  59. GRB980425: Radio Observations
  60. report on BSAX observations of GRB980425
  61. GRB980326 X-ray Observations
  62. GRB980326, optical observations
  63. GRB980326, optical observations
  64. GRB980326 IPN annulus
  65. GRB980329 Keck K-band observations
  66. GRB980326 optical observations
  67. GRB980329 optical observations
  68. GRB980329 VLA observations
  69. GRB980329 optical observations
  70. GRB980326 optical observations
  71. Optical Observations of GRB 970508
  72. Near-IR follow-up on GRB 971227
  73. Optical Observations of the GRB 971227 field
  74. Optical Observations on GRB 971227
  75. GRB971227: Plaskett R-band observations
  76. GRB 971227: Optical clarifications
  77. GRB971227: Further CAHA R-band images
  78. GRB971227: LOTIS observations
  79. GRB 971227: CAHA R-band images
  80. GRB971214: Optical Observations and Calibrations
  81. GRB 971214: Optical Observations
  82. Radio Observations of GRB 971214 at the VLA
  83. GRB 971024: KPNO Optical Observations
  84. GRB 970828: Palomar Observations

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