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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"

45520 results found.

  1. IPN triangulation of GRB020910
  2. IPN GCN Circulars now to be issued without restriction
  3. Single IPN error box for GRB020904
  4. XRF 020903: optical observation at Kyoto
  5. GRB020322 : HST/STIS observations
  6. XRF 020903: Optical observations
  7. IPN triangulation of GRB020904
  8. XRF 020903: Optical observations
  9. IPN detection of a burst from SGR1900+14
  10. XRF 020903, optical observations
  11. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  12. INTEGRAL GRBs added to GCN
  13. GRB020813: optical observation
  14. GRB020812: optical observation
  15. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  16. SGR1900+14 burst localized by HETE
  17. GRB020813: High-resolution optical spectroscopy
  18. GRB020819: optical observations at Bisei
  19. GRB020812: negative optical observations
  20. GRB 020812: optical observation at Kyoto University
  21. Second epoch K band imaging of GRB 020819
  22. GRB020813, Baade 6.5m data now available
  23. GRB 020813 : HST observations
  24. Confirming no variability for GRB02081
  25. GRB020819 : Optical observations at KISO
  26. GRB 020812: early time optical observation at Ouda Station
  27. GRB020813: VRI Decay Slopes
  28. GRB020813: Magellan BVRI Photometry
  29. GRB 020819 : OT candidate - confirmation of non variability
  30. GRB 020819: Optical observations
  31. K band observation of GRB 020819
  32. GRB020819: optical observations
  33. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  34. IPN triangulation of GRB020819 (HETE 2275)
  35. HETE 2275: Optical observations
  36. GRB020813: optical and NIR observations
  37. GRB020813: Fading X-ray Afterglow Observed with Chandra
  38. GRB020813, UBVRI field calibration
  39. GRB 020813: addendum to GCN 1498
  40. GRB020813: optical observations at Bisei
  41. GRB020813: V-band decay slope
  42. GRB020812: NIR observations
  43. Polarimetry of GRB020813: evidence for variability
  44. GRB020813 IRAM millimeter observations
  45. GRB020812: optical observations
  46. GRB020813: High-Resolution Optical Observations
  47. GRB020813(=H2262): Revised Localization with HETE SXC
  48. GRB 020812: optical observation at Bisei
  49. GRB020813: Early Time Magnitude
  50. GRB020813: optical observations; possible host galaxy
  51. GRB 020813, radio detection
  52. GRB 020812 : optical afterglow candidate
  53. GRB020813, optical observations
  54. Millimeter observation of GRB 020813
  55. GRB020812: optical observations
  56. GRB 020813 : KISO multiband optical observations
  57. GRB020813, optical observations
  58. IPN error box for GRB020813
  59. IPN triangulation of GRB020813
  60. GRB020812: possible afterglow candidate
  61. Early Time Limits for GRB020813
  62. GRB020812: possible afterglow candidate
  63. GRB020813, astrometric position
  64. Spectropolarimetry of GRB 020813
  65. GRB 020813 Afterglow Observations; Possible break
  66. GRB 020813: Absorption redshift
  67. GRB 020813 multiband optical observations
  68. GRB020813: optical afterglow
  69. GRB020813: Fading of Candidate OT
  70. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  71. GRB020813: Candidate Optical Afterglow
  72. GRB 020812 optical observation
  73. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  74. GRB 020715, optical observations
  75. GRB 020714, optical observations
  76. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  77. GRB020801: Candidate OT present in DSS
  78. HST Imaging of the Host of GRB 011121
  79. GRB020801, optical afterglow candidate
  80. Further refinement to IPN error box for GRB020531
  81. GRB020331: Late-time Optical Light Curve (re-submission)
  82. GRB020331: Late-time Optical Light Curve
  83. GRB 020405: HST observations reveal red bump
  84. IPN triangulation of GRB020714
  85. IPN triangulation of GRB020715 (=GRB150702)
  86. IPN triangulation of GRB020714
  87. IPN triangulation of GRB150702
  88. GRB 020410: Discovery of Probable OT by HST
  89. GRB 020124, HST observations of the fading afterglow
  90. IPN triangulation of GRB020708
  91. IPN triangulation of GRB020708
  92. IPN error box for GRB020706
  93. Correction to IPN error box for GRB020706
  94. IPN triangulation of GRB020706
  95. GRB 020705: Optical observations
  96. GRB 020625, optical observations
  97. GRB 020625: Optical observations
  98. GRB 020531: optical photometry of Chandra sources
  99. GRB020625 (=H2081): A Long Burst Localized by HETE
  100. HETE #2081: Optical observations

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