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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"

36309 results found.

  1. IPN detection of possible bursts from SGR1806-20
  2. IPN triangulation of GRB020525
  3. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  4. IPN triangulation of a burst from SGR1806-20
  5. GRB/XRF 020427, Radio Observations
  6. HST detection of the likely host galaxy of GRB 020124
  7. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  8. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  9. GRB020321 : Optical observations.
  10. GRB020427 BeppoSAX NFI Observation
  11. XRF 020427
  12. GRB020331: Third Epoch and Revised Second Epoch Optical
  13. The end of BSAX GRB activities
  14. GRB 020410, Radio Observations
  15. GRB 020418: Optical observations
  16. GRB 020124: Optical observations
  17. GRB 020418: Optical observations
  18. IPN triangulation of GRB020418
  19. GRB020405: VLT observations of the OT environment
  20. GRB020410: BeppoSAX NFI observations refined analysis
  21. GRB 020409: Optical Observations
  22. Mars Odyssey joins the IPN
  23. IPN triangulation of GRB020413
  24. GRB 020409, 2-nd epoch optical observations at Terskol.
  25. GRB 020409: Optical observations
  26. GRB 020409, No Optical Detection to R = 22
  27. GRB 020409: No Evidence for an Optical Afterglow
  28. GRB 020409, 2nd epoch optical observations
  29. GRB 020331 Kyoto observation on March 31
  30. GRB 020409
  31. GRB 020409 SARA Observations
  32. GRB "020411"
  33. GRB 020409, No Optical Detection to R = 20
  34. GRB020410: BeppoSAX NFI observation
  35. GRB 020409: Optical observations
  36. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  37. GRB 020410, optical observations
  38. BeppoSAX ALERT: possible GRB020411
  39. GRB 020409, optical observations
  40. GRB 020409: Optical Observations
  41. GRB020406(?), optical observations
  42. GRB020410, optical observations
  43. BeppoSAX ALERT: possible GRB020410
  44. X-ray afterglow of GRB020321
  45. BeppoSAX GRB : GRB020409
  46. GRB020405: VLT optical observations and V band decay slope
  47. GRB020331 optical observations with RIMOTS
  48. GRB020124 optical observations with RIBOTS/RIMOTS
  49. GRB 020321: Candidate X-ray Counterparts
  50. ASM GRB candidate 020406 refined error box
  51. GRB 020405: Moderate-resolution spectroscopy
  52. GRB020406(?), optical observations
  53. GRB020405: VLT optical observations
  54. Revised Photometry of the Optical Afterglow of GRB 020405
  55. GRB020405: OT observations
  56. GRB 020331: Candidate Optical Afterglow
  57. GRB 020405: Decay index
  58. Short RXTE/ASM transient 020406; may be a GRB
  59. GRB020405, Radio Observations
  60. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  61. GRB 020405, U-band observations
  62. GRB 020405: Optical afterglow candidate
  63. IPN localization of GRB020405
  64. GRB011212: Optical Observations
  65. GRB 020331: NIR Observations
  66. GRB 020331: NIR Observations
  67. GRB020331 NIR observation at KPNO (re-submission)
  68. GRB02033 NIR observation at KPNO
  69. GRB020331 field photometry
  70. GRB 020331 Optical Observations
  71. GRB 020331, NIR observations
  72. GRB 020331: Optical observations
  73. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  74. GRB 020321: Infrared observations
  75. GRB 020322: BeppoSAX observations of the X-ray afterglow
  76. SN 2002ap - peak brightness date (SN/GRB?)
  77. GRB 020322, Radio observations
  78. Near-Infrared Observations of GRB020322 at TIRGO
  79. GRB 020321, Radio Observations
  80. GRB 020322: Optical Observations
  81. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  82. GRB 020321: Optical observations
  83. GRB020317 BVRI field photometry
  84. GRB011211 revised BVRI field photometry
  85. GRB020305 BVRI field photometry
  86. GRB020322 BVRI field photometry
  87. GRB 020322 optical observations
  88. GRB 020322 optical observation
  89. GRB020317 : Near IR Observations from Mt Abu Observatory
  90. GRB 020322: Optical Sources and Improved Astrometry
  91. GRB020322, optical observations
  92. GRB 020322: Optical candidate
  93. GRB020322: BeppoSAX/NFI Observations
  94. Bepposax GRB020322 The second springtime BSAX GRB
  95. GRB 020321: Optical observations
  96. GRB 011121: Fourth Epoch of HST Imaging
  97. GRB020317: optical observations
  98. GRB020321 optical observations
  99. GRB020321: BeppoSAX/NFI Observations
  100. GRB020321: a faint BeppoSAX detection

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