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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"

45532 results found.

  1. GRB 020409: Optical Observations
  2. GRB020406(?), optical observations
  3. GRB020410, optical observations
  4. BeppoSAX ALERT: possible GRB020410
  5. X-ray afterglow of GRB020321
  6. GRB020331: Confirmation of Afterglow Candidate with Magellan
  7. GRB020405: VLT optical observations and V band decay slope
  8. GRB020331 optical observations with RIMOTS
  9. GRB020124 optical observations with RIBOTS/RIMOTS
  10. GRB 020321: Candidate X-ray Counterparts
  11. ASM GRB candidate 020406 refined error box
  12. GRB 020405: Moderate-resolution spectroscopy
  13. GRB020331: Optical Observations of Afterglow Candidate
  14. GRB020406(?), optical observations
  15. GRB020405: VLT optical observations
  16. Revised Photometry of the Optical Afterglow of GRB 020405
  17. GRB020405: OT observations
  18. GRB 020331: Candidate Optical Afterglow
  19. GRB 020405: Decay index
  20. Short RXTE/ASM transient 020406; may be a GRB
  21. GRB020405, Radio Observations
  22. GRB020405: VLT spectroscopy
  23. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  24. V band observations of GRB020405
  25. GRB 020405, U-band observations
  26. GRB 020405: Optical afterglow candidate
  27. IPN localization of GRB020405
  28. GRB011212: Optical Observations
  29. GRB 020331: NIR Observations
  30. GRB 020331: NIR Observations
  31. GRB020331 NIR observation at KPNO (re-submission)
  32. GRB02033 NIR observation at KPNO
  33. GRB020331 field photometry
  34. GRB 020331 Optical Observations
  35. GRB 020331, NIR observations
  36. GRB 020331: Optical observations
  37. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  38. GRB 020321: Infrared observations
  39. GRB 020322: BeppoSAX observations of the X-ray afterglow
  40. SN 2002ap - peak brightness date (SN/GRB?)
  41. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  42. GRB 020322, Radio observations
  43. Near-Infrared Observations of GRB020322 at TIRGO
  44. GRB 020321, Radio Observations
  45. GRB 020322: Optical Observations
  46. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  47. GRB 020321: Optical observations
  48. GRB020317 BVRI field photometry
  49. GRB011211 revised BVRI field photometry
  50. GRB020305 BVRI field photometry
  51. GRB020322 BVRI field photometry
  52. GRB 020322 optical observations
  53. GRB020322: Candidate Optical Afterglow
  54. GRB 020322 optical observation
  55. GRB020317 : Near IR Observations from Mt Abu Observatory
  56. GRB 020322: Optical Sources and Improved Astrometry
  57. GRB020322, optical observations
  58. GRB 020322: Optical candidate
  59. XMM-Newton observation of GRB020322
  60. GRB020322: Optical Observations
  61. GRB020322: BeppoSAX/NFI Observations
  62. GRB 020321: Optical observations
  63. GRB 011121: Fourth Epoch of HST Imaging
  64. GRB020317: optical observations
  65. GRB020321 optical observations
  66. GRB020321: BeppoSAX/NFI Observations
  67. GRB020321: a faint BeppoSAX detection
  68. GRB020305: NIR observations
  69. GRB 020317 : KISO Optical Observations
  70. BeppoSAX ALERT: GRB020321, the "Springtime Burst"
  71. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  72. GRB 020305: Optical Observations
  73. GRB020317, optical observations
  74. GRB 020317: Optical observations
  75. GRB 011121: Third HST Epoch
  76. GRB020305: Properties of the Candidate Optical Afterglow
  77. GRB 011121: HST Observations reveal an intermediate-time multicolor
  78. GRB011121, possible supernova association
  79. GRB011130 (XRF011130) Second Epoch Chandra Observations
  80. GRB020305: Subaru Optical Observations
  81. GRB 020305: Optical observations
  82. XRF/GRB 011030 Images
  83. XRF/GRB 011030: Detection of the Probable Host Galaxy
  84. GRB 020305: Candidate optical afterglow
  85. Type Ic SN2002bl (SN/GRB?) Radio Observations
  86. GRB020305, optical observations
  87. GRB020305: Optical Observations
  88. IPN triangulation of GRB020305 (HETE 1939)
  89. GRB020305 (=H1939): Localization of a GRB by HETE
  90. GRB 020305: Optical observations
  91. HST Imaging of the afterglow and host of GRB 011121
  92. GRB 010921: HST Observations
  93. IPN detection and localization of Cygnus X-1 flares
  94. GRB020127: Further VLA Observations of Possible Counterparts
  95. RXTE Observations of SGR 1900+14
  96. IPN detection of further SGR1900+14 activity
  97. SGR1900+14 activity
  98. IPN/HETE Detection of Bursts from SGR1900+14
  99. IPN Upper Limits to a GRB Associated With SN2002ap
  100. GRB020124 BVRI field photometry

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