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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"

32571 results found.

  1. GRB020405: OT observations
  2. GRB 020331: Candidate Optical Afterglow
  3. GRB 020405: Decay index
  4. GRB020405, Radio Observations
  5. GRB020405: VLT spectroscopy
  6. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  7. V band observations of GRB020405
  8. GRB 020405, U-band observations
  9. IPN localization of GRB020405
  10. GRB011212: Optical Observations
  11. GRB 020331: NIR Observations
  12. GRB 020331: NIR Observations
  13. GRB020331 field photometry
  14. GRB 020331, NIR observations
  15. GRB 020331: Optical observations
  16. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  17. GRB 020321: Infrared observations
  18. GRB 020322: BeppoSAX observations of the X-ray afterglow
  19. SN 2002ap - peak brightness date (SN/GRB?)
  20. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  21. GRB 020322, Radio observations
  22. Near-Infrared Observations of GRB020322 at TIRGO
  23. GRB 020321, Radio Observations
  24. GRB 020322: Optical Observations
  25. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  26. GRB 020321: Optical observations
  27. GRB020317 BVRI field photometry
  28. GRB011211 revised BVRI field photometry
  29. GRB020305 BVRI field photometry
  30. GRB020322 BVRI field photometry
  31. GRB 020322 optical observations
  32. GRB020322: Candidate Optical Afterglow
  33. GRB 020322 optical observation
  34. GRB 020322: Optical Sources and Improved Astrometry
  35. GRB020322, optical observations
  36. GRB 020322: Optical candidate
  37. XMM-Newton observation of GRB020322
  38. GRB020322: Optical Observations
  39. GRB 020321: Optical observations
  40. GRB 011121: Fourth Epoch of HST Imaging
  41. GRB020317: optical observations
  42. GRB020321 optical observations
  43. GRB020305: NIR observations
  44. GRB 020317 : KISO Optical Observations
  45. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  46. GRB 020305: Optical Observations
  47. GRB020317, optical observations
  48. GRB 011121: Third HST Epoch
  49. GRB020305: Properties of the Candidate Optical Afterglow
  50. GRB 011121: HST Observations reveal an intermediate-time multicolor
  51. GRB011121, possible supernova association
  52. GRB011130 (XRF011130) Second Epoch Chandra Observations
  53. GRB020305: Subaru Optical Observations
  54. GRB 020305: Optical observations
  55. XRF/GRB 011030 Images
  56. XRF/GRB 011030: Detection of the Probable Host Galaxy
  57. GRB 020305: Candidate optical afterglow
  58. Type Ic SN2002bl (SN/GRB?) Radio Observations
  59. GRB020305 (=H1939): Localization of a GRB by HETE
  60. HST Imaging of the afterglow and host of GRB 011121
  61. GRB 010921: HST Observations
  62. GRB020127: Further VLA Observations of Possible Counterparts
  63. IPN detection of further SGR1900+14 activity
  64. SGR1900+14 activity
  65. GRB020124 BVRI field photometry
  66. GRB020127: Palomar and VLA Observations of Possible Counterparts
  67. GRB020127, WSRT radio observations
  68. GRB020127 Optical Observations
  69. SN2002ap (SN/GRB?) UBVRI Field Photometry
  70. GRB020127: Chandra Observations and Prospective Counterparts
  71. pre-SN2002ap (SN/GRB?) imaging of M74
  72. Type Ib/c SN2002ap (SN/GRB?)
  73. GRB020127: Optical observations
  74. GRB 020127, I-band observations starting 3.14-hr after the event
  75. IPN triangulation of GRB020127 (=H1902)
  76. GRB020127 Optical Observations -- Erratum to GCN 1230
  77. GRB010921 Optical Observations
  78. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  79. GRB020124: Optical observations
  80. VLT observations of GRB 020124: The fading optical/near-infrared afterglow
  81. GRB020124: Optical observations
  82. GRB 020124: Optical observations
  83. GRB 020124 Optical Observations
  84. IPN triangulation of GRB020124 (HETE 1896)
  85. GRB 020124: Optical afterglow
  86. GRB020124(=H1896): Localization of a Long GRB by HETE
  87. GRB optical counterpart candidate in GCN 1217 is M dwarf
  88. GRB011212, Optical Observations
  89. GRB011211: BeppoSAX/GRBM data
  90. Optical polarization observations for GRB011211
  91. Color indices of the afterglow of GRB011211
  92. GRB011212: Optical observations at Gunma
  93. GRB 011211, spectrum and optical photometry
  94. GRB 011130: Optical Observations of X-ray and Radio Sources
  95. GRB 011130, Radio/X-ray Comparison
  96. GRB011212: Optical observations
  97. GRB 011212: optical observation at Asiago
  98. GRB 011211: Evidence for an Optical Break
  99. GRB 011211: TNG Spectroscopic Observations
  100. optical follow-up of GRB(XRF) 011211

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