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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"

45527 results found.

  1. IPN triangulation of GRB020706
  2. GRB 020705: Optical observations
  3. GRB 020625, optical observations
  4. GRB 020625: Optical observations
  5. GRB 020531: optical photometry of Chandra sources
  6. GRB020625 (=H2081): A Long Burst Localized by HETE
  7. HETE #2081: Optical observations
  8. The Probable Host Galaxy of GRB/XRF 020427
  9. GRB/XRF 020427, detection of an underlying system with the VLT
  10. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  11. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  12. AXP 1E2259+586: quasi-simultaneous optical observation
  13. AXP 1E2259+586 optical observations
  14. Fading Optical Source in the Field of GRB020531
  15. GRB 020531, INT+WFC deep optical upper limits
  16. SGR-like Bursts from the AXP 1E 2259+586
  17. GRB020405: polarimetric observations
  18. GRB 020531, simultaneous optical observations
  19. GRB 020604, optical observations
  20. GRB 020531/Candidate Redshift
  21. GRB020531: Detection of Candidate Host Galaxy
  22. GRB020531: Second epoch Chandra observations
  23. GRB020604, optical observations
  24. GRB020604, BVRcIc field photometry
  25. GRB020603, BVRcIc field observations
  26. GRB020531, BVRcIc field photometry
  27. GRB020531 Optical observations with TAROT
  28. GRB020531 Optical observations with TAROT
  29. GRB 020418, optical/near-IR observations
  30. GRB 020531, Radio Observations
  31. IPN triangulation of GRB020604
  32. GRB020531 Optical Observations
  33. GRB020531: Observations with the Chandra X-ray Observatory
  34. GRB 020603: Optical Observations
  35. GRB 020603, R-band observation
  36. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  37. GRB020531: Upper Limit for Detection of Two TAROT Sources
  38. GRB 020603: Optical observations
  39. IPN triangulation of GRB020603 (possible short/hard GRB)
  40. GRB 020531 optical observations with TAROT
  41. Refined IPN error box for GRB020531
  42. GRB020531, optical observations
  43. GRB020531: optical observations
  44. GRB020531, optical observation
  45. GRB020531(=H2042): Optical Observations
  46. IPN triangulation of the short, hard GRB020531 (=H2042)
  47. GRB020531(=H2042): Optical Observations
  48. GRB020531: Optical observations
  49. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  50. GRB 020525: Optical Observations
  51. GRB020525, optical observations
  52. IPN detection of possible bursts from SGR1806-20
  53. IPN triangulation of GRB020525
  54. XRF 020427: Sudden Ionospheric Disturbance (SID)
  55. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  56. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  57. IPN triangulation of a burst from SGR1806-20
  58. GRB/XRF 020427, Radio Observations
  59. HST detection of the likely host galaxy of GRB 020124
  60. GRB020405 field photometry at ESO
  61. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  62. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  63. GRB020321 : Optical observations.
  64. GRB020427 BeppoSAX NFI Observation
  65. XRF 020427
  66. GRB020331: Third Epoch and Revised Second Epoch Optical
  67. The end of BSAX GRB activities
  68. GRB 020410, Radio Observations
  69. GRB 020418: Optical observations
  70. GRB 020124: Optical observations
  71. GRB 020418: Optical observations
  72. IPN triangulation of GRB020418
  73. GRB020405: VLT observations of the OT environment
  74. GRB020410: BeppoSAX NFI observations refined analysis
  75. GRB 020409: Optical Observations
  76. Mars Odyssey joins the IPN
  77. IPN triangulation of GRB020413
  78. GRB 020409, 2-nd epoch optical observations at Terskol.
  79. GRB020405: predicted break
  80. GRB 020409: Optical observations
  81. GRB 020409, No Optical Detection to R = 22
  82. GRB020410: second BeppoSAX NFI observation
  83. GRB 020409: No Evidence for an Optical Afterglow
  84. GRB 020409, 2nd epoch optical observations
  85. GRB 020331 Kyoto observation on March 31
  86. GRB 020409
  87. GRB 020409 SARA Observations
  88. GRB "020411"
  89. GRB 020409, No Optical Detection to R = 20
  90. GRB020410: BeppoSAX NFI observation
  91. GRB 020409: Optical observations
  92. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  93. GRB 020410, optical observations
  94. BeppoSAX ALERT: possible GRB020411
  95. GRB 020409, optical observations
  96. GRB 020409: Optical Observations
  97. GRB020406(?), optical observations
  98. GRB020410, optical observations
  99. BeppoSAX ALERT: possible GRB020410
  100. X-ray afterglow of GRB020321

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