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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"

36110 results found.

  1. IPN triangulation of the short, hard GRB020531 (=H2042)
  2. GRB020531(=H2042): Optical Observations
  3. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  4. GRB 020525: Optical Observations
  5. GRB020525, optical observations
  6. IPN detection of possible bursts from SGR1806-20
  7. IPN triangulation of GRB020525
  8. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  9. IPN triangulation of a burst from SGR1806-20
  10. GRB/XRF 020427, Radio Observations
  11. HST detection of the likely host galaxy of GRB 020124
  12. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  13. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  14. GRB020321 : Optical observations.
  15. GRB020427 BeppoSAX NFI Observation
  16. XRF 020427
  17. GRB020331: Third Epoch and Revised Second Epoch Optical
  18. The end of BSAX GRB activities
  19. GRB 020410, Radio Observations
  20. GRB 020418: Optical observations
  21. GRB 020124: Optical observations
  22. GRB 020418: Optical observations
  23. IPN triangulation of GRB020418
  24. GRB020405: VLT observations of the OT environment
  25. GRB020410: BeppoSAX NFI observations refined analysis
  26. GRB 020409: Optical Observations
  27. Mars Odyssey joins the IPN
  28. IPN triangulation of GRB020413
  29. GRB 020409, 2-nd epoch optical observations at Terskol.
  30. GRB 020409: Optical observations
  31. GRB 020409, No Optical Detection to R = 22
  32. GRB 020409: No Evidence for an Optical Afterglow
  33. GRB 020409, 2nd epoch optical observations
  34. GRB 020331 Kyoto observation on March 31
  35. GRB 020409
  36. GRB 020409 SARA Observations
  37. GRB "020411"
  38. GRB 020409, No Optical Detection to R = 20
  39. GRB020410: BeppoSAX NFI observation
  40. GRB 020409: Optical observations
  41. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  42. GRB 020410, optical observations
  43. BeppoSAX ALERT: possible GRB020411
  44. GRB 020409, optical observations
  45. GRB 020409: Optical Observations
  46. GRB020406(?), optical observations
  47. GRB020410, optical observations
  48. BeppoSAX ALERT: possible GRB020410
  49. X-ray afterglow of GRB020321
  50. BeppoSAX GRB : GRB020409
  51. GRB020405: VLT optical observations and V band decay slope
  52. GRB020331 optical observations with RIMOTS
  53. GRB020124 optical observations with RIBOTS/RIMOTS
  54. GRB 020321: Candidate X-ray Counterparts
  55. ASM GRB candidate 020406 refined error box
  56. GRB 020405: Moderate-resolution spectroscopy
  57. GRB020406(?), optical observations
  58. GRB020405: VLT optical observations
  59. Revised Photometry of the Optical Afterglow of GRB 020405
  60. GRB020405: OT observations
  61. GRB 020331: Candidate Optical Afterglow
  62. GRB 020405: Decay index
  63. Short RXTE/ASM transient 020406; may be a GRB
  64. GRB020405, Radio Observations
  65. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  66. GRB 020405, U-band observations
  67. GRB 020405: Optical afterglow candidate
  68. IPN localization of GRB020405
  69. GRB011212: Optical Observations
  70. GRB 020331: NIR Observations
  71. GRB 020331: NIR Observations
  72. GRB020331 NIR observation at KPNO (re-submission)
  73. GRB02033 NIR observation at KPNO
  74. GRB020331 field photometry
  75. GRB 020331 Optical Observations
  76. GRB 020331, NIR observations
  77. GRB 020331: Optical observations
  78. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  79. GRB 020321: Infrared observations
  80. GRB 020322: BeppoSAX observations of the X-ray afterglow
  81. SN 2002ap - peak brightness date (SN/GRB?)
  82. GRB 020322, Radio observations
  83. Near-Infrared Observations of GRB020322 at TIRGO
  84. GRB 020321, Radio Observations
  85. GRB 020322: Optical Observations
  86. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  87. GRB 020321: Optical observations
  88. GRB020317 BVRI field photometry
  89. GRB011211 revised BVRI field photometry
  90. GRB020305 BVRI field photometry
  91. GRB020322 BVRI field photometry
  92. GRB 020322 optical observations
  93. GRB 020322 optical observation
  94. GRB020317 : Near IR Observations from Mt Abu Observatory
  95. GRB 020322: Optical Sources and Improved Astrometry
  96. GRB020322, optical observations
  97. GRB 020322: Optical candidate
  98. GRB020322: BeppoSAX/NFI Observations
  99. Bepposax GRB020322 The second springtime BSAX GRB
  100. GRB 020321: Optical observations

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