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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"

37680 results found.

  1. GRB020813: optical observations; possible host galaxy
  2. GRB 020813, radio detection
  3. GRB 020812 : optical afterglow candidate
  4. Millimeter observation of GRB 020813
  5. GRB020812: optical observations
  6. GRB 020813 : KISO multiband optical observations
  7. IPN error box for GRB020813
  8. IPN triangulation of GRB020813
  9. GRB020812: possible afterglow candidate
  10. Early Time Limits for GRB020813
  11. GRB020812: possible afterglow candidate
  12. GRB020813, astrometric position
  13. Spectropolarimetry of GRB 020813
  14. GRB 020813 Afterglow Observations; Possible break
  15. GRB 020813: Absorption redshift
  16. GRB 020813 multiband optical observations
  17. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  18. GRB 020812 optical observation
  19. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  20. GRB 020715, optical observations
  21. GRB 020714, optical observations
  22. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  23. HST Imaging of the Host of GRB 011121
  24. GRB020801, optical afterglow candidate
  25. Further refinement to IPN error box for GRB020531
  26. GRB020331: Late-time Optical Light Curve (re-submission)
  27. GRB020331: Late-time Optical Light Curve
  28. GRB 020405: HST observations reveal red bump
  29. IPN triangulation of GRB020714
  30. IPN triangulation of GRB020715 (=GRB150702)
  31. IPN triangulation of GRB020714
  32. IPN triangulation of GRB150702
  33. GRB 020410: Discovery of Probable OT by HST
  34. GRB 020124, HST observations of the fading afterglow
  35. IPN triangulation of GRB020708
  36. IPN triangulation of GRB020708
  37. IPN error box for GRB020706
  38. IPN triangulation of GRB020706
  39. GRB 020705: Optical observations
  40. GRB 020625, optical observations
  41. GRB 020625: Optical observations
  42. GRB 020531: optical photometry of Chandra sources
  43. GRB020625 (=H2081): A Long Burst Localized by HETE
  44. The Probable Host Galaxy of GRB/XRF 020427
  45. GRB/XRF 020427, detection of an underlying system with the VLT
  46. GRB 020531, INT+WFC deep optical upper limits
  47. GRB020405: polarimetric observations
  48. GRB 020531, simultaneous optical observations
  49. GRB 020604, optical observations
  50. GRB 020531/Candidate Redshift
  51. GRB020531: Second epoch Chandra observations
  52. GRB020604, optical observations
  53. GRB020604, BVRcIc field photometry
  54. GRB020603, BVRcIc field observations
  55. GRB020531, BVRcIc field photometry
  56. GRB020531 Optical observations with TAROT
  57. GRB020531 Optical observations with TAROT
  58. GRB 020418, optical/near-IR observations
  59. GRB 020531, Radio Observations
  60. IPN triangulation of GRB020604
  61. GRB020531: Observations with the Chandra X-ray Observatory
  62. GRB 020603: Optical Observations
  63. GRB 020603, R-band observation
  64. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  65. GRB 020603: Optical observations
  66. IPN triangulation of GRB020603 (possible short/hard GRB)
  67. GRB 020531 optical observations with TAROT
  68. Refined IPN error box for GRB020531
  69. GRB020531, optical observations
  70. GRB020531(=H2042): Optical Observations
  71. IPN triangulation of the short, hard GRB020531 (=H2042)
  72. GRB020531(=H2042): Optical Observations
  73. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  74. GRB 020525: Optical Observations
  75. GRB020525, optical observations
  76. IPN detection of possible bursts from SGR1806-20
  77. IPN triangulation of GRB020525
  78. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  79. IPN triangulation of a burst from SGR1806-20
  80. GRB/XRF 020427, Radio Observations
  81. HST detection of the likely host galaxy of GRB 020124
  82. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  83. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  84. GRB020321 : Optical observations.
  85. GRB020427 BeppoSAX NFI Observation
  86. XRF 020427
  87. GRB020331: Third Epoch and Revised Second Epoch Optical
  88. The end of BSAX GRB activities
  89. GRB 020410, Radio Observations
  90. GRB 020418: Optical observations
  91. GRB 020124: Optical observations
  92. GRB 020418: Optical observations
  93. IPN triangulation of GRB020418
  94. GRB020405: VLT observations of the OT environment
  95. GRB020410: BeppoSAX NFI observations refined analysis
  96. GRB 020409: Optical Observations
  97. Mars Odyssey joins the IPN
  98. IPN triangulation of GRB020413
  99. GRB 020409, 2-nd epoch optical observations at Terskol.
  100. GRB 020409: Optical observations

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