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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"

16203 results found.

  1. GRB020531, optical observation
  2. GRB020531(=H2042): Optical Observations
  3. GRB020531(=H2042): Optical Observations
  4. GRB020531: Optical observations
  5. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  6. GRB 020525: Optical Observations
  7. GRB020525, optical observations
  8. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  9. HST detection of the likely host galaxy of GRB 020124
  10. GRB020321 : Optical observations.
  11. GRB020331: Third Epoch and Revised Second Epoch Optical
  12. The end of BSAX GRB activities
  13. GRB 020418: Optical observations
  14. GRB 020124: Optical observations
  15. GRB 020418: Optical observations
  16. GRB 020409: Optical Observations
  17. GRB 020409, 2-nd epoch optical observations at Terskol.
  18. GRB 020409: Optical observations
  19. GRB 020409, No Optical Detection to R = 22
  20. GRB 020409: No Evidence for an Optical Afterglow
  21. GRB 020409, 2nd epoch optical observations
  22. GRB 020331 Kyoto observation on March 31
  23. GRB 020409, No Optical Detection to R = 20
  24. GRB 020409: Optical observations
  25. GRB 020410, optical observations
  26. GRB 020409, optical observations
  27. GRB 020409: Optical Observations
  28. GRB020406(?), optical observations
  29. GRB020410, optical observations
  30. X-ray afterglow of GRB020321
  31. GRB020331: Confirmation of Afterglow Candidate with Magellan
  32. GRB020405: VLT optical observations and V band decay slope
  33. GRB020331 optical observations with RIMOTS
  34. GRB020124 optical observations with RIBOTS/RIMOTS
  35. GRB020331: Optical Observations of Afterglow Candidate
  36. GRB020406(?), optical observations
  37. GRB020405: VLT optical observations
  38. Revised Photometry of the Optical Afterglow of GRB 020405
  39. GRB 020331: Candidate Optical Afterglow
  40. GRB 020405: Decay index
  41. GRB020405, Radio Observations
  42. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  43. GRB 020405, U-band observations
  44. GRB 020405: Optical afterglow candidate
  45. GRB011212: Optical Observations
  46. GRB 020331 Optical Observations
  47. GRB 020331: Optical observations
  48. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  49. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  50. GRB 020322, Radio observations
  51. Near-Infrared Observations of GRB020322 at TIRGO
  52. GRB 020322: Optical Observations
  53. GRB 020321: Optical observations
  54. GRB020317 BVRI field photometry
  55. GRB011211 revised BVRI field photometry
  56. GRB020305 BVRI field photometry
  57. GRB020322 BVRI field photometry
  58. GRB 020322 optical observations
  59. GRB020322: Candidate Optical Afterglow
  60. GRB 020322 optical observation
  61. GRB 020322: Optical Sources and Improved Astrometry
  62. GRB020322, optical observations
  63. GRB 020322: Optical candidate
  64. GRB020322: Optical Observations
  65. GRB 020321: Optical observations
  66. GRB 011121: Fourth Epoch of HST Imaging
  67. GRB020317: optical observations
  68. GRB020321 optical observations
  69. GRB 020317 : KISO Optical Observations
  70. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  71. GRB 020305: Optical Observations
  72. GRB020317, optical observations
  73. GRB 020317: Optical observations
  74. GRB020305: Properties of the Candidate Optical Afterglow
  75. GRB 011121: HST Observations reveal an intermediate-time multicolor
  76. GRB020305: Subaru Optical Observations
  77. GRB 020305: Optical observations
  78. XRF/GRB 011030: Detection of the Probable Host Galaxy
  79. GRB 020305: Candidate optical afterglow
  80. Type Ic SN2002bl (SN/GRB?) Radio Observations
  81. GRB020305, optical observations
  82. GRB020305: Optical Observations
  83. IPN triangulation of GRB020305 (HETE 1939)
  84. GRB020305 (=H1939): Localization of a GRB by HETE
  85. GRB 020305: Optical observations
  86. HST Imaging of the afterglow and host of GRB 011121
  87. GRB020124 BVRI field photometry
  88. GRB020127: Palomar and VLA Observations of Possible Counterparts
  89. SN2002ap (SN/GRB?) optical spectrographic observations
  90. GRB020127 Optical Observations
  91. Type Ib/c SN2002ap (SN/GRB?)
  92. Type Ib/c SN2002ap (SN/GRB?) Radio Observations
  93. GRB020124, optical observations
  94. GRB020127: Optical observations
  95. IPN triangulation of GRB020127 (=H1902)
  96. GRB020127 Optical Observations -- Erratum to GCN 1230
  97. GRB010921 Optical Observations
  98. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  99. GRB020124: Optical observations
  100. VLT observations of GRB 020124: The fading optical/near-infrared afterglow

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