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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"

36316 results found.

  1. Confirmation of IPN error box for GRB020910
  2. IPN triangulation of GRB020910
  3. IPN GCN Circulars now to be issued without restriction
  4. Single IPN error box for GRB020904
  5. XRF 020903: optical observation at Kyoto
  6. GRB020322 : HST/STIS observations
  7. IPN triangulation of GRB020904
  8. IPN detection of a burst from SGR1900+14
  9. INTEGRAL GRBs added to GCN
  10. GRB020813: High-resolution optical spectroscopy
  11. GRB 020812: optical observation at Kyoto University
  12. Second epoch K band imaging of GRB 020819
  13. GRB020813, Baade 6.5m data now available
  14. GRB 020813 : HST observations
  15. Confirming no variability for GRB02081
  16. GRB020819 : Optical observations at KISO
  17. GRB 020812: early time optical observation at Ouda Station
  18. GRB020813: VRI Decay Slopes
  19. GRB 020819 : OT candidate - confirmation of non variability
  20. GRB 020819: Optical observations
  21. K band observation of GRB 020819
  22. GRB020819: optical observations
  23. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  24. IPN triangulation of GRB020819 (HETE 2275)
  25. GRB020813, UBVRI field calibration
  26. GRB 020813: addendum to GCN 1498
  27. GRB020813: optical observations at Bisei
  28. GRB020813: V-band decay slope
  29. Polarimetry of GRB020813: evidence for variability
  30. GRB020813 IRAM millimeter observations
  31. GRB020812: optical observations
  32. GRB 020812: optical observation at Bisei
  33. GRB020813: optical observations; possible host galaxy
  34. GRB 020813, radio detection
  35. GRB 020812 : optical afterglow candidate
  36. Millimeter observation of GRB 020813
  37. GRB020812: optical observations
  38. GRB 020813 : KISO multiband optical observations
  39. IPN error box for GRB020813
  40. IPN triangulation of GRB020813
  41. GRB020812: possible afterglow candidate
  42. Early Time Limits for GRB020813
  43. GRB020812: possible afterglow candidate
  44. GRB020813, astrometric position
  45. Spectropolarimetry of GRB 020813
  46. GRB 020813 Afterglow Observations; Possible break
  47. GRB 020813: Absorption redshift
  48. GRB 020813 multiband optical observations
  49. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  50. GRB 020812 optical observation
  51. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  52. GRB 020715, optical observations
  53. GRB 020714, optical observations
  54. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  55. HST Imaging of the Host of GRB 011121
  56. GRB020801, optical afterglow candidate
  57. Further refinement to IPN error box for GRB020531
  58. GRB020331: Late-time Optical Light Curve (re-submission)
  59. GRB020331: Late-time Optical Light Curve
  60. GRB 020405: HST observations reveal red bump
  61. IPN triangulation of GRB020714
  62. IPN triangulation of GRB020715 (=GRB150702)
  63. IPN triangulation of GRB020714
  64. IPN triangulation of GRB150702
  65. GRB 020410: Discovery of Probable OT by HST
  66. GRB 020124, HST observations of the fading afterglow
  67. IPN triangulation of GRB020708
  68. IPN triangulation of GRB020708
  69. IPN error box for GRB020706
  70. IPN triangulation of GRB020706
  71. GRB 020705: Optical observations
  72. GRB 020625, optical observations
  73. GRB 020625: Optical observations
  74. GRB 020531: optical photometry of Chandra sources
  75. GRB020625 (=H2081): A Long Burst Localized by HETE
  76. The Probable Host Galaxy of GRB/XRF 020427
  77. GRB/XRF 020427, detection of an underlying system with the VLT
  78. GRB 020531, INT+WFC deep optical upper limits
  79. GRB020405: polarimetric observations
  80. GRB 020531, simultaneous optical observations
  81. GRB 020604, optical observations
  82. GRB 020531/Candidate Redshift
  83. GRB020531: Second epoch Chandra observations
  84. GRB020604, optical observations
  85. GRB020604, BVRcIc field photometry
  86. GRB020603, BVRcIc field observations
  87. GRB020531, BVRcIc field photometry
  88. GRB020531 Optical observations with TAROT
  89. GRB020531 Optical observations with TAROT
  90. GRB 020418, optical/near-IR observations
  91. GRB 020531, Radio Observations
  92. IPN triangulation of GRB020604
  93. GRB020531: Observations with the Chandra X-ray Observatory
  94. GRB 020603: Optical Observations
  95. GRB 020603, R-band observation
  96. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  97. GRB 020603: Optical observations
  98. IPN triangulation of GRB020603 (possible short/hard GRB)
  99. GRB 020531 optical observations with TAROT
  100. Refined IPN error box for GRB020531

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