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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"

36315 results found.

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

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