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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"

38138 results found.

  1. GRB 981220
  2. GRB 981220, radio observations
  3. GRB981226 Optical Observation
  4. GRB 981220, radio observations
  5. GRB 981220: BeppoSAX/GRBM results
  6. GRB981220 I-band Observations
  7. GRB 981220
  8. GRB 981220 Optical Observations
  9. GRB 981220, optical observations
  10. GRB 980326/Host Galaxy
  11. GRB981220 IPN error box
  12. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  13. GRB980329 R,I flux calibration and R,I,K upper limits
  14. GRB980425: X-ray revised positions
  15. GRB 980923 BATSE Observations
  16. GRB980703 Very Long Baseline Interferometry
  17. GRB970508 optical observations
  18. GRB971214, association with a Galactic star?
  19. Optical Observations of the Host Galaxy of GRB 980519
  20. GRB980519, Optical Observations
  21. GRB980703, Host galaxy multicolor photometry
  22. GRB980703 - BeppoSAX/GRBM detection
  23. GRB 980703 (NFI observations)
  24. GRB980703 optical photometry
  25. GRB 980703: BATSE Observations
  26. GRB980703: Radio transient
  27. GRB980703 H-band Observations
  28. GRB 980703: Spectrum of the proposed optical counterpart
  29. RXTE Observation of GRB 980706
  30. GRB980703: Spectrum of the proposed optical counterpart
  31. GRB980703 Transient Optical Follow-Up
  32. GRB980703: LOTIS observation at early times
  33. GRB980613 Optical Observations
  34. GRB 980703
  35. GRB 980703 H-band Observations
  36. GRB980703 (optical R observations)
  37. GRB980706
  38. GRB980703: radio source/optical transient
  39. BeppoSAX NFI observations of GRB 980703
  40. GRB 980703: ASM Position & Intensity
  41. GRB980703
  42. GRB980703 optical followup
  43. GRB 980613 Near-IR observations
  44. GRB980613, optical observations
  45. GRB 980613: Optical transient and its host galaxy
  46. GRB 980613: Detection of the probable host galaxy
  47. GRB 980613: BATSE Observations
  48. GRB 980613 Optical Observations
  49. GRB 980613 optical observations
  50. GRB980613 Optical Observations
  51. GRB980613 observations from Palomar
  52. GRB980613 BeppoSAX-NFI follow up
  53. GRB 980613 new optical/IR observations
  54. GRB 980613 optical/IR obs.
  55. GRB980613 Near Infra-Red Observations
  56. GRB980611
  57. GRB980613, BeppoSAX WFC positions
  58. GRB971214 Secondary Standards
  59. GRB980519 Secondary Standards
  60. BATSE on-board GRB trigger change
  61. GRB 980519 Optical Observations
  62. GRB980519 optical observations
  63. GRB 980519
  64. GRB980519 optical observations
  65. GRB 980519 Optical Observations
  66. GRB980519 BATSE Observations
  67. GRB970519, optical follow-up at Schmidt Calern
  68. GRB980519 optical observations
  69. GRB980519 Optical Observations
  70. GRB980519 Optical Observations
  71. GRB980519 IPN POSITION
  72. GRB980519 Optical Observations
  73. GRB 980519 Optical Observations
  74. GRB980519 optical observations
  75. GRB980515, BeppoSAX IAUC to be submitted
  76. BATSE on-board GRB trigger change
  77. BeppoSAX GRB ALERT: updated position of grb980515
  78. GRB 980425 Radio Light Curve
  79. GRB 980425 Brightness Temperature
  80. GRB980425 BATSE observations
  81. SAX J0840.7+2248 Optical Observations
  82. GRB 980425 optical observations
  83. GRB980425: optical obs.
  84. GRB980425: Radio Observations
  85. GRB 980425 optical observations
  86. GRB 980425 optical observations
  87. GRB 980329 ROSAT observation
  88. GRB980326 X-ray Observations
  89. GRB980326, optical observations
  90. GRB980326, optical observations
  91. GRB980329, Fading IR counterpart to radio source
  92. GRByymmdd, Announcement of automation
  93. GRB980326 IPN annulus
  94. GRB980329 sub-millimeter observations
  95. GRB980329 IPN annulus
  96. GRB980329 near-IR observations
  97. GRB980326 optical observations
  98. GRB980329 optical observations
  99. GRB980329 VLA observations
  100. GRB980329 near IR observations

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