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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"

37679 results found.

  1. GRB 020813, radio detection
  2. GRB 020812 : optical afterglow candidate
  3. Millimeter observation of GRB 020813
  4. GRB020812: optical observations
  5. GRB 020813 : KISO multiband optical observations
  6. IPN error box for GRB020813
  7. IPN triangulation of GRB020813
  8. GRB020812: possible afterglow candidate
  9. Early Time Limits for GRB020813
  10. GRB020812: possible afterglow candidate
  11. GRB020813, astrometric position
  12. Spectropolarimetry of GRB 020813
  13. GRB 020813 Afterglow Observations; Possible break
  14. GRB 020813: Absorption redshift
  15. GRB 020813 multiband optical observations
  16. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  17. GRB 020812 optical observation
  18. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  19. GRB 020715, optical observations
  20. GRB 020714, optical observations
  21. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  22. HST Imaging of the Host of GRB 011121
  23. GRB020801, optical afterglow candidate
  24. Further refinement to IPN error box for GRB020531
  25. GRB020331: Late-time Optical Light Curve (re-submission)
  26. GRB020331: Late-time Optical Light Curve
  27. GRB 020405: HST observations reveal red bump
  28. IPN triangulation of GRB020714
  29. IPN triangulation of GRB020715 (=GRB150702)
  30. IPN triangulation of GRB020714
  31. IPN triangulation of GRB150702
  32. GRB 020410: Discovery of Probable OT by HST
  33. GRB 020124, HST observations of the fading afterglow
  34. IPN triangulation of GRB020708
  35. IPN triangulation of GRB020708
  36. IPN error box for GRB020706
  37. IPN triangulation of GRB020706
  38. GRB 020705: Optical observations
  39. GRB 020625, optical observations
  40. GRB 020625: Optical observations
  41. GRB 020531: optical photometry of Chandra sources
  42. GRB020625 (=H2081): A Long Burst Localized by HETE
  43. The Probable Host Galaxy of GRB/XRF 020427
  44. GRB/XRF 020427, detection of an underlying system with the VLT
  45. GRB 020531, INT+WFC deep optical upper limits
  46. GRB020405: polarimetric observations
  47. GRB 020531, simultaneous optical observations
  48. GRB 020604, optical observations
  49. GRB 020531/Candidate Redshift
  50. GRB020531: Second epoch Chandra observations
  51. GRB020604, optical observations
  52. GRB020604, BVRcIc field photometry
  53. GRB020603, BVRcIc field observations
  54. GRB020531, BVRcIc field photometry
  55. GRB020531 Optical observations with TAROT
  56. GRB020531 Optical observations with TAROT
  57. GRB 020418, optical/near-IR observations
  58. GRB 020531, Radio Observations
  59. IPN triangulation of GRB020604
  60. GRB020531: Observations with the Chandra X-ray Observatory
  61. GRB 020603: Optical Observations
  62. GRB 020603, R-band observation
  63. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  64. GRB 020603: Optical observations
  65. IPN triangulation of GRB020603 (possible short/hard GRB)
  66. GRB 020531 optical observations with TAROT
  67. Refined IPN error box for GRB020531
  68. GRB020531, optical observations
  69. GRB020531(=H2042): Optical Observations
  70. IPN triangulation of the short, hard GRB020531 (=H2042)
  71. GRB020531(=H2042): Optical Observations
  72. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  73. GRB 020525: Optical Observations
  74. GRB020525, optical observations
  75. IPN detection of possible bursts from SGR1806-20
  76. IPN triangulation of GRB020525
  77. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  78. IPN triangulation of a burst from SGR1806-20
  79. GRB/XRF 020427, Radio Observations
  80. HST detection of the likely host galaxy of GRB 020124
  81. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  82. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  83. GRB020321 : Optical observations.
  84. GRB020427 BeppoSAX NFI Observation
  85. XRF 020427
  86. GRB020331: Third Epoch and Revised Second Epoch Optical
  87. The end of BSAX GRB activities
  88. GRB 020410, Radio Observations
  89. GRB 020418: Optical observations
  90. GRB 020124: Optical observations
  91. GRB 020418: Optical observations
  92. IPN triangulation of GRB020418
  93. GRB020405: VLT observations of the OT environment
  94. GRB020410: BeppoSAX NFI observations refined analysis
  95. GRB 020409: Optical Observations
  96. Mars Odyssey joins the IPN
  97. IPN triangulation of GRB020413
  98. GRB 020409, 2-nd epoch optical observations at Terskol.
  99. GRB 020409: Optical observations
  100. GRB 020409, No Optical Detection to R = 22

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