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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"

36076 results found.

  1. GRB020812: optical observations
  2. GRB 020813 : KISO multiband optical observations
  3. IPN error box for GRB020813
  4. IPN triangulation of GRB020813
  5. GRB020812: possible afterglow candidate
  6. Early Time Limits for GRB020813
  7. GRB020812: possible afterglow candidate
  8. GRB020813, astrometric position
  9. Spectropolarimetry of GRB 020813
  10. GRB 020813 Afterglow Observations; Possible break
  11. GRB 020813: Absorption redshift
  12. GRB 020813 multiband optical observations
  13. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  14. GRB 020812 optical observation
  15. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  16. GRB 020715, optical observations
  17. GRB 020714, optical observations
  18. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  19. HST Imaging of the Host of GRB 011121
  20. GRB020801, optical afterglow candidate
  21. Further refinement to IPN error box for GRB020531
  22. GRB020331: Late-time Optical Light Curve (re-submission)
  23. GRB020331: Late-time Optical Light Curve
  24. GRB 020405: HST observations reveal red bump
  25. IPN triangulation of GRB020714
  26. IPN triangulation of GRB020715 (=GRB150702)
  27. IPN triangulation of GRB020714
  28. IPN triangulation of GRB150702
  29. GRB 020410: Discovery of Probable OT by HST
  30. GRB 020124, HST observations of the fading afterglow
  31. IPN triangulation of GRB020708
  32. IPN triangulation of GRB020708
  33. IPN error box for GRB020706
  34. IPN triangulation of GRB020706
  35. GRB 020705: Optical observations
  36. GRB 020625, optical observations
  37. GRB 020625: Optical observations
  38. GRB 020531: optical photometry of Chandra sources
  39. GRB020625 (=H2081): A Long Burst Localized by HETE
  40. The Probable Host Galaxy of GRB/XRF 020427
  41. GRB/XRF 020427, detection of an underlying system with the VLT
  42. GRB 020531, INT+WFC deep optical upper limits
  43. GRB020405: polarimetric observations
  44. GRB 020531, simultaneous optical observations
  45. GRB 020604, optical observations
  46. GRB 020531/Candidate Redshift
  47. GRB020531: Second epoch Chandra observations
  48. GRB020604, optical observations
  49. GRB020604, BVRcIc field photometry
  50. GRB020603, BVRcIc field observations
  51. GRB020531, BVRcIc field photometry
  52. GRB020531 Optical observations with TAROT
  53. GRB020531 Optical observations with TAROT
  54. GRB 020418, optical/near-IR observations
  55. GRB 020531, Radio Observations
  56. IPN triangulation of GRB020604
  57. GRB020531: Observations with the Chandra X-ray Observatory
  58. GRB 020603: Optical Observations
  59. GRB 020603, R-band observation
  60. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  61. GRB 020603: Optical observations
  62. IPN triangulation of GRB020603 (possible short/hard GRB)
  63. GRB 020531 optical observations with TAROT
  64. Refined IPN error box for GRB020531
  65. GRB020531, optical observations
  66. GRB020531(=H2042): Optical Observations
  67. IPN triangulation of the short, hard GRB020531 (=H2042)
  68. GRB020531(=H2042): Optical Observations
  69. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  70. GRB 020525: Optical Observations
  71. GRB020525, optical observations
  72. IPN detection of possible bursts from SGR1806-20
  73. IPN triangulation of GRB020525
  74. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  75. IPN triangulation of a burst from SGR1806-20
  76. GRB/XRF 020427, Radio Observations
  77. HST detection of the likely host galaxy of GRB 020124
  78. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  79. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  80. GRB020321 : Optical observations.
  81. GRB020427 BeppoSAX NFI Observation
  82. XRF 020427
  83. GRB020331: Third Epoch and Revised Second Epoch Optical
  84. The end of BSAX GRB activities
  85. GRB 020410, Radio Observations
  86. GRB 020418: Optical observations
  87. GRB 020124: Optical observations
  88. GRB 020418: Optical observations
  89. IPN triangulation of GRB020418
  90. GRB020405: VLT observations of the OT environment
  91. GRB020410: BeppoSAX NFI observations refined analysis
  92. GRB 020409: Optical Observations
  93. Mars Odyssey joins the IPN
  94. IPN triangulation of GRB020413
  95. GRB 020409, 2-nd epoch optical observations at Terskol.
  96. GRB 020409: Optical observations
  97. GRB 020409, No Optical Detection to R = 22
  98. GRB 020409: No Evidence for an Optical Afterglow
  99. GRB 020409, 2nd epoch optical observations
  100. GRB 020331 Kyoto observation on March 31

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