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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"

37578 results found.

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

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