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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"

32551 results found.

  1. The Probable Host Galaxy of GRB/XRF 020427
  2. GRB/XRF 020427, detection of an underlying system with the VLT
  3. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  4. AXP 1E2259+586: quasi-simultaneous optical observation
  5. AXP 1E2259+586 optical observations
  6. Fading Optical Source in the Field of GRB020531
  7. GRB 020531, INT+WFC deep optical upper limits
  8. GRB020405: polarimetric observations
  9. GRB 020531, simultaneous optical observations
  10. GRB 020604, optical observations
  11. GRB 020531/Candidate Redshift
  12. GRB020531: Detection of Candidate Host Galaxy
  13. GRB020531: Second epoch Chandra observations
  14. GRB020604, optical observations
  15. GRB020604, BVRcIc field photometry
  16. GRB020603, BVRcIc field observations
  17. GRB020531, BVRcIc field photometry
  18. GRB020531 Optical observations with TAROT
  19. GRB020531 Optical observations with TAROT
  20. GRB 020531, Radio Observations
  21. GRB020531 Optical Observations
  22. GRB 020603: Optical Observations
  23. GRB 020603, R-band observation
  24. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  25. GRB020531: Upper Limit for Detection of Two TAROT Sources
  26. GRB 020603: Optical observations
  27. GRB 020531 optical observations with TAROT
  28. Refined IPN error box for GRB020531
  29. GRB020531, optical observations
  30. GRB020531: optical observations
  31. GRB020531(=H2042): Optical Observations
  32. IPN triangulation of the short, hard GRB020531 (=H2042)
  33. GRB020531(=H2042): Optical Observations
  34. GRB020531: Optical observations
  35. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  36. GRB 020525: Optical Observations
  37. GRB020525, optical observations
  38. IPN detection of possible bursts from SGR1806-20
  39. XRF 020427: Sudden Ionospheric Disturbance (SID)
  40. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  41. GRB/XRF 020427, Radio Observations
  42. HST detection of the likely host galaxy of GRB 020124
  43. GRB020405 field photometry at ESO
  44. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  45. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  46. GRB020321 : Optical observations.
  47. GRB020331: Third Epoch and Revised Second Epoch Optical
  48. GRB 020410, Radio Observations
  49. GRB 020418: Optical observations
  50. GRB 020124: Optical observations
  51. GRB 020418: Optical observations
  52. GRB020405: VLT observations of the OT environment
  53. GRB020410: BeppoSAX NFI observations refined analysis
  54. GRB 020409: Optical Observations
  55. Mars Odyssey joins the IPN
  56. GRB 020409, 2-nd epoch optical observations at Terskol.
  57. GRB020405: predicted break
  58. GRB 020409: Optical observations
  59. GRB 020409, No Optical Detection to R = 22
  60. GRB 020409: No Evidence for an Optical Afterglow
  61. GRB 020409, 2nd epoch optical observations
  62. GRB 020331 Kyoto observation on March 31
  63. GRB 020409, No Optical Detection to R = 20
  64. GRB 020409: Optical observations
  65. GRB 020410, optical observations
  66. GRB 020409, optical observations
  67. GRB 020409: Optical Observations
  68. GRB020406(?), optical observations
  69. X-ray afterglow of GRB020321
  70. GRB020331: Confirmation of Afterglow Candidate with Magellan
  71. GRB020405: VLT optical observations and V band decay slope
  72. GRB020331 optical observations with RIMOTS
  73. GRB020124 optical observations with RIBOTS/RIMOTS
  74. GRB 020321: Candidate X-ray Counterparts
  75. ASM GRB candidate 020406 refined error box
  76. GRB 020405: Moderate-resolution spectroscopy
  77. GRB020331: Optical Observations of Afterglow Candidate
  78. GRB020406(?), optical observations
  79. GRB020405: VLT optical observations
  80. Revised Photometry of the Optical Afterglow of GRB 020405
  81. GRB020405: OT observations
  82. GRB 020331: Candidate Optical Afterglow
  83. GRB 020405: Decay index
  84. GRB020405, Radio Observations
  85. GRB020405: VLT spectroscopy
  86. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  87. V band observations of GRB020405
  88. GRB 020405, U-band observations
  89. IPN localization of GRB020405
  90. GRB011212: Optical Observations
  91. GRB 020331: NIR Observations
  92. GRB 020331: NIR Observations
  93. GRB020331 field photometry
  94. GRB 020331, NIR observations
  95. GRB 020331: Optical observations
  96. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  97. GRB 020321: Infrared observations
  98. GRB 020322: BeppoSAX observations of the X-ray afterglow
  99. SN 2002ap - peak brightness date (SN/GRB?)
  100. GRB011211: HST Observations of Optical Afterglow and Host Galaxy

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