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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"

36310 results found.

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

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