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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').

22288 results found.

  1. GRB 980326/Host Galaxy
  2. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  3. BeppoSAX NFI Observation of GRB980425
  4. GRB980329 R,I flux calibration and R,I,K upper limits
  5. GRB980425 Optical Follow-up
  6. GRB 980923 BATSE Observations
  7. SGR1900+14, BeppoSAX-GRBM observations
  8. GRB970508 optical observations
  9. GRB971214, association with a Galactic star?
  10. GRB980519, Optical Observations
  11. GRB980703 - BeppoSAX/GRBM detection
  12. GRB980703 optical photometry
  13. GRB 980703: BATSE Observations
  14. GRB980703 optical observations
  15. GRB980703: Radio transient
  16. GRB 980703: Spectrum of the proposed optical counterpart
  17. GRB980703 Transient Optical Follow-Up
  18. GRB980703: LOTIS observation at early times
  19. GRB980613 Optical Observations
  20. GRB980703 (I band observations)
  21. BeppoSAX NFI observations of GRB 980703
  22. GRB980519 observation report
  23. GRB980703 optical followup
  24. Radio observations of SGRs
  25. SGR1900+14 field optical observations
  26. GRB980613, optical observations
  27. GRB 980613: Optical transient and its host galaxy
  28. SGR1627-41, RXTE/ASM observations
  29. GRB 980613: Detection of the probable host galaxy
  30. Reduced error box of SGR 1627-41
  31. GRB 980613: BATSE Observations
  32. GRB 980613 Optical Observations
  33. GRB 980613 optical observations
  34. Discovery of a new SGR source, SGR1627-41
  35. GRB980613 Optical Observations
  36. GRB980613 observations from Palomar
  37. GRB 980613 optical/IR obs.
  38. GRB980613 Near Infra-Red Observations
  39. GRB971214 Secondary Standards
  40. GRB980519 Secondary Standards
  41. BATSE on-board GRB trigger change
  42. GRB 980519 Optical Observations
  43. GRB 980519
  44. GRB980519 optical observations
  45. GRB 980519 Optical Observations
  46. GRB980519 BATSE Observations
  47. GRB980519 Optical Observations
  48. GRB980519 Optical Observations
  49. GRB 980519 Optical Observations
  50. GRB980515, BeppoSAX IAUC to be submitted
  51. BSAX Observations of GRB980425 field
  52. IPN web site of GRBs
  53. GRB980425 BATSE observations
  54. SAX J0840.7+2248 Optical Observations
  55. GRB980425: optical obs.
  56. GRB980425: Radio Observations
  57. report on BSAX observations of GRB980425
  58. GRB 980329 ROSAT observation
  59. GRB980326 X-ray Observations
  60. GRB980326, optical observations
  61. GRB980326, optical observations
  62. GRB980329, Fading IR counterpart to radio source
  63. GRB980329 Keck K-band observations
  64. GRB980329 sub-millimeter observations
  65. GRB980329 optical observations
  66. GRB980329 near-IR observations
  67. GRB980329 near-IR observations
  68. GRB980326 optical observations
  69. GRB980329 optical observations
  70. GRB980329 VLA observations
  71. GRB980329 optical observations
  72. GRB980329 optical observations
  73. GRB980326 optical observations
  74. GRB980326 optical observations
  75. Untitled
  76. Untitled
  77. Untitled
  78. Untitled
  79. Untitled
  80. Untitled
  81. Untitled
  82. Untitled
  83. Untitled
  84. GRB 971214: Optical Observations
  85. Radio Observations of GRB 971214 at the VLA
  86. Untitled
  87. GRB 971024: KPNO Optical Observations
  88. GRB 970828: Palomar Observations

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