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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"

32706 results found.

  1. GRB 981220, radio observations
  2. GRB 981220: BeppoSAX/GRBM results
  3. GRB981220 I-band Observations
  4. GRB 981220
  5. GRB 981220 Optical Observations
  6. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  7. BeppoSAX NFI Observation of GRB980425
  8. GRB980425 Optical Follow-up
  9. GRB980425: X-ray revised positions
  10. GRB980703 Very Long Baseline Interferometry
  11. GRB970508 optical observations
  12. Optical Observations of the Host Galaxy of GRB 980519
  13. GRB980519, Optical Observations
  14. GRB980703, Host galaxy multicolor photometry
  15. GRB 980703 (NFI observations)
  16. GRB980703 optical photometry
  17. GRB 980703: BATSE Observations
  18. GRB980703 optical observations
  19. GRB980703: Radio transient
  20. GRB980703 H-band Observations
  21. GRB 980703: Spectrum of the proposed optical counterpart
  22. RXTE Observation of GRB 980706
  23. GRB980703: Spectrum of the proposed optical counterpart
  24. GRB980703 Transient Optical Follow-Up
  25. GRB980703: LOTIS observation at early times
  26. GRB980613 Optical Observations
  27. GRB 980703
  28. GRB980703 (I band observations)
  29. GRB 980703 H-band Observations
  30. GRB980703: radio source/optical transient
  31. BeppoSAX NFI observations of GRB 980703
  32. GRB980519 observation report
  33. Radio observations of SGRs
  34. GRB 980613 Near-IR observations
  35. GRB980613, optical observations
  36. GRB 980613: Optical transient and its host galaxy
  37. SGR1627-41, RXTE/ASM observations
  38. SGR1627-41, Refined IPN annulus location
  39. GRB 980613: Detection of the probable host galaxy
  40. Reduced error box of SGR 1627-41
  41. SGR1627-41, BeppoSAX-GRBM detections
  42. GRB 980613 Optical Observations
  43. GRB 980613 optical observations
  44. GRB980613 Optical Observations
  45. GRB980613 observations from Palomar
  46. GRB 980613 new optical/IR observations
  47. GRB971214 Secondary Standards
  48. GRB980519 Secondary Standards
  49. SGR1900+14
  50. GRB 980519 Optical Observations
  51. GRB980519 optical observations
  52. GRB980519 I-band observations
  53. GRB 980519
  54. GRB980519 optical observations
  55. GRB 980519 Optical Observations
  56. GRB980519 BATSE Observations
  57. GRB970519, optical follow-up at Schmidt Calern
  58. GRB980519 optical observations
  59. GRB980519 Optical Observations
  60. GRB980519 Optical Observations
  61. GRB980519 IPN POSITION
  62. GRB980519 Optical Observations
  63. GRB 980519 Optical Observations
  64. GRB980519 optical observations
  65. GRB980515, BeppoSAX IAUC to be submitted
  66. GRB980519, BeppoSAX-WFC updated position
  67. GRB 980425 Radio Light Curve
  68. GRB 980425 Brightness Temperature
  69. BSAX Observations of GRB980425 field
  70. IPN web site of GRBs
  71. GRB980425 BATSE observations
  72. SAX J0840.7+2248 Optical Observations
  73. GRB 980425 optical observations
  74. GRB980425: optical obs.
  75. GRB980425: Radio Observations
  76. GRB 980425 optical observations
  77. GRB980326, optical observations
  78. GRB980326, optical observations
  79. GRB980329, Fading IR counterpart to radio source
  80. GRByymmdd, Announcement of automation
  81. GRB980326 IPN annulus
  82. GRB980329
  83. GRB980329 Keck K-band observations
  84. GRB980329 sub-millimeter observations
  85. GRB980329 IPN annulus
  86. GRB980329 optical observations
  87. GRB980329 near-IR observations
  88. GRB980329 optical observations
  89. GRB980326 optical observations
  90. GRB980326 optical observations
  91. GRB970508 SAO RAS optical observations
  92. GRB 971214: Redshift from Keck Observations
  93. Near-IR follow-up on GRB 971227
  94. GRB971214: Keck R & I-band Observations
  95. GRB 971227: Optical Observations
  96. Optical Observations of the GRB 971227 field
  97. GRB971227: Plaskett R-band observations
  98. GRB 971227: Optical clarifications
  99. GRB971227: LOTIS observations
  100. GRB971214: Optical Observations and Calibrations

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