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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"

36204 results found.

  1. HST detection of the likely host galaxy of GRB 020124
  2. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  3. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  4. GRB020321 : Optical observations.
  5. GRB020427 BeppoSAX NFI Observation
  6. XRF 020427
  7. GRB020331: Third Epoch and Revised Second Epoch Optical
  8. The end of BSAX GRB activities
  9. GRB 020410, Radio Observations
  10. GRB 020418: Optical observations
  11. GRB 020124: Optical observations
  12. GRB 020418: Optical observations
  13. IPN triangulation of GRB020418
  14. GRB020405: VLT observations of the OT environment
  15. GRB020410: BeppoSAX NFI observations refined analysis
  16. GRB 020409: Optical Observations
  17. Mars Odyssey joins the IPN
  18. IPN triangulation of GRB020413
  19. GRB 020409, 2-nd epoch optical observations at Terskol.
  20. GRB 020409: Optical observations
  21. GRB 020409, No Optical Detection to R = 22
  22. GRB 020409: No Evidence for an Optical Afterglow
  23. GRB 020409, 2nd epoch optical observations
  24. GRB 020331 Kyoto observation on March 31
  25. GRB 020409
  26. GRB 020409 SARA Observations
  27. GRB "020411"
  28. GRB 020409, No Optical Detection to R = 20
  29. GRB020410: BeppoSAX NFI observation
  30. GRB 020409: Optical observations
  31. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  32. GRB 020410, optical observations
  33. BeppoSAX ALERT: possible GRB020411
  34. GRB 020409, optical observations
  35. GRB 020409: Optical Observations
  36. GRB020406(?), optical observations
  37. GRB020410, optical observations
  38. BeppoSAX ALERT: possible GRB020410
  39. X-ray afterglow of GRB020321
  40. BeppoSAX GRB : GRB020409
  41. GRB020405: VLT optical observations and V band decay slope
  42. GRB020331 optical observations with RIMOTS
  43. GRB020124 optical observations with RIBOTS/RIMOTS
  44. GRB 020321: Candidate X-ray Counterparts
  45. ASM GRB candidate 020406 refined error box
  46. GRB 020405: Moderate-resolution spectroscopy
  47. GRB020406(?), optical observations
  48. GRB020405: VLT optical observations
  49. Revised Photometry of the Optical Afterglow of GRB 020405
  50. GRB020405: OT observations
  51. GRB 020331: Candidate Optical Afterglow
  52. GRB 020405: Decay index
  53. Short RXTE/ASM transient 020406; may be a GRB
  54. GRB020405, Radio Observations
  55. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  56. GRB 020405, U-band observations
  57. GRB 020405: Optical afterglow candidate
  58. IPN localization of GRB020405
  59. GRB011212: Optical Observations
  60. GRB 020331: NIR Observations
  61. GRB 020331: NIR Observations
  62. GRB020331 NIR observation at KPNO (re-submission)
  63. GRB02033 NIR observation at KPNO
  64. GRB020331 field photometry
  65. GRB 020331 Optical Observations
  66. GRB 020331, NIR observations
  67. GRB 020331: Optical observations
  68. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  69. GRB 020321: Infrared observations
  70. GRB 020322: BeppoSAX observations of the X-ray afterglow
  71. SN 2002ap - peak brightness date (SN/GRB?)
  72. GRB 020322, Radio observations
  73. Near-Infrared Observations of GRB020322 at TIRGO
  74. GRB 020321, Radio Observations
  75. GRB 020322: Optical Observations
  76. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  77. GRB 020321: Optical observations
  78. GRB020317 BVRI field photometry
  79. GRB011211 revised BVRI field photometry
  80. GRB020305 BVRI field photometry
  81. GRB020322 BVRI field photometry
  82. GRB 020322 optical observations
  83. GRB 020322 optical observation
  84. GRB020317 : Near IR Observations from Mt Abu Observatory
  85. GRB 020322: Optical Sources and Improved Astrometry
  86. GRB020322, optical observations
  87. GRB 020322: Optical candidate
  88. GRB020322: BeppoSAX/NFI Observations
  89. Bepposax GRB020322 The second springtime BSAX GRB
  90. GRB 020321: Optical observations
  91. GRB 011121: Fourth Epoch of HST Imaging
  92. GRB020317: optical observations
  93. GRB020321 optical observations
  94. GRB020321: BeppoSAX/NFI Observations
  95. GRB020321: a faint BeppoSAX detection
  96. GRB 020317 : KISO Optical Observations
  97. BeppoSAX ALERT: GRB020321, the "Springtime Burst"
  98. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  99. GRB 020305: Optical Observations
  100. GRB020317, optical observations

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