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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"

36212 results found.

  1. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  2. GRB 020525: Optical Observations
  3. GRB020525, optical observations
  4. IPN detection of possible bursts from SGR1806-20
  5. IPN triangulation of GRB020525
  6. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  7. IPN triangulation of a burst from SGR1806-20
  8. GRB/XRF 020427, Radio Observations
  9. HST detection of the likely host galaxy of GRB 020124
  10. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  11. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  12. GRB020321 : Optical observations.
  13. GRB020427 BeppoSAX NFI Observation
  14. XRF 020427
  15. GRB020331: Third Epoch and Revised Second Epoch Optical
  16. The end of BSAX GRB activities
  17. GRB 020410, Radio Observations
  18. GRB 020418: Optical observations
  19. GRB 020124: Optical observations
  20. GRB 020418: Optical observations
  21. IPN triangulation of GRB020418
  22. GRB020405: VLT observations of the OT environment
  23. GRB020410: BeppoSAX NFI observations refined analysis
  24. GRB 020409: Optical Observations
  25. Mars Odyssey joins the IPN
  26. IPN triangulation of GRB020413
  27. GRB 020409, 2-nd epoch optical observations at Terskol.
  28. GRB 020409: Optical observations
  29. GRB 020409, No Optical Detection to R = 22
  30. GRB 020409: No Evidence for an Optical Afterglow
  31. GRB 020409, 2nd epoch optical observations
  32. GRB 020331 Kyoto observation on March 31
  33. GRB 020409
  34. GRB 020409 SARA Observations
  35. GRB "020411"
  36. GRB 020409, No Optical Detection to R = 20
  37. GRB020410: BeppoSAX NFI observation
  38. GRB 020409: Optical observations
  39. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  40. GRB 020410, optical observations
  41. BeppoSAX ALERT: possible GRB020411
  42. GRB 020409, optical observations
  43. GRB 020409: Optical Observations
  44. GRB020406(?), optical observations
  45. GRB020410, optical observations
  46. BeppoSAX ALERT: possible GRB020410
  47. X-ray afterglow of GRB020321
  48. BeppoSAX GRB : GRB020409
  49. GRB020405: VLT optical observations and V band decay slope
  50. GRB020331 optical observations with RIMOTS
  51. GRB020124 optical observations with RIBOTS/RIMOTS
  52. GRB 020321: Candidate X-ray Counterparts
  53. ASM GRB candidate 020406 refined error box
  54. GRB 020405: Moderate-resolution spectroscopy
  55. GRB020406(?), optical observations
  56. GRB020405: VLT optical observations
  57. Revised Photometry of the Optical Afterglow of GRB 020405
  58. GRB020405: OT observations
  59. GRB 020331: Candidate Optical Afterglow
  60. GRB 020405: Decay index
  61. Short RXTE/ASM transient 020406; may be a GRB
  62. GRB020405, Radio Observations
  63. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  64. GRB 020405, U-band observations
  65. GRB 020405: Optical afterglow candidate
  66. IPN localization of GRB020405
  67. GRB011212: Optical Observations
  68. GRB 020331: NIR Observations
  69. GRB 020331: NIR Observations
  70. GRB020331 NIR observation at KPNO (re-submission)
  71. GRB02033 NIR observation at KPNO
  72. GRB020331 field photometry
  73. GRB 020331 Optical Observations
  74. GRB 020331, NIR observations
  75. GRB 020331: Optical observations
  76. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  77. GRB 020321: Infrared observations
  78. GRB 020322: BeppoSAX observations of the X-ray afterglow
  79. SN 2002ap - peak brightness date (SN/GRB?)
  80. GRB 020322, Radio observations
  81. Near-Infrared Observations of GRB020322 at TIRGO
  82. GRB 020321, Radio Observations
  83. GRB 020322: Optical Observations
  84. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  85. GRB 020321: Optical observations
  86. GRB020317 BVRI field photometry
  87. GRB011211 revised BVRI field photometry
  88. GRB020305 BVRI field photometry
  89. GRB020322 BVRI field photometry
  90. GRB 020322 optical observations
  91. GRB 020322 optical observation
  92. GRB020317 : Near IR Observations from Mt Abu Observatory
  93. GRB 020322: Optical Sources and Improved Astrometry
  94. GRB020322, optical observations
  95. GRB 020322: Optical candidate
  96. GRB020322: BeppoSAX/NFI Observations
  97. Bepposax GRB020322 The second springtime BSAX GRB
  98. GRB 020321: Optical observations
  99. GRB 011121: Fourth Epoch of HST Imaging
  100. GRB020317: optical observations

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