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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"

35997 results found.

  1. GRB020819 : Optical observations at KISO
  2. GRB 020812: early time optical observation at Ouda Station
  3. GRB020813: VRI Decay Slopes
  4. GRB 020819 : OT candidate - confirmation of non variability
  5. GRB 020819: Optical observations
  6. K band observation of GRB 020819
  7. GRB020819: optical observations
  8. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  9. IPN triangulation of GRB020819 (HETE 2275)
  10. GRB020813, UBVRI field calibration
  11. GRB 020813: addendum to GCN 1498
  12. GRB020813: optical observations at Bisei
  13. GRB020813: V-band decay slope
  14. Polarimetry of GRB020813: evidence for variability
  15. GRB020813 IRAM millimeter observations
  16. GRB020812: optical observations
  17. GRB 020812: optical observation at Bisei
  18. GRB020813: optical observations; possible host galaxy
  19. GRB 020813, radio detection
  20. GRB 020812 : optical afterglow candidate
  21. Millimeter observation of GRB 020813
  22. GRB020812: optical observations
  23. GRB 020813 : KISO multiband optical observations
  24. IPN error box for GRB020813
  25. IPN triangulation of GRB020813
  26. GRB020812: possible afterglow candidate
  27. Early Time Limits for GRB020813
  28. GRB020812: possible afterglow candidate
  29. GRB020813, astrometric position
  30. Spectropolarimetry of GRB 020813
  31. GRB 020813 Afterglow Observations; Possible break
  32. GRB 020813: Absorption redshift
  33. GRB 020813 multiband optical observations
  34. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  35. GRB 020812 optical observation
  36. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  37. GRB 020715, optical observations
  38. GRB 020714, optical observations
  39. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  40. HST Imaging of the Host of GRB 011121
  41. GRB020801, optical afterglow candidate
  42. Further refinement to IPN error box for GRB020531
  43. GRB020331: Late-time Optical Light Curve (re-submission)
  44. GRB020331: Late-time Optical Light Curve
  45. GRB 020405: HST observations reveal red bump
  46. IPN triangulation of GRB020714
  47. IPN triangulation of GRB020715 (=GRB150702)
  48. IPN triangulation of GRB020714
  49. IPN triangulation of GRB150702
  50. GRB 020410: Discovery of Probable OT by HST
  51. GRB 020124, HST observations of the fading afterglow
  52. IPN triangulation of GRB020708
  53. IPN triangulation of GRB020708
  54. IPN error box for GRB020706
  55. IPN triangulation of GRB020706
  56. GRB 020705: Optical observations
  57. GRB 020625, optical observations
  58. GRB 020625: Optical observations
  59. GRB 020531: optical photometry of Chandra sources
  60. GRB020625 (=H2081): A Long Burst Localized by HETE
  61. The Probable Host Galaxy of GRB/XRF 020427
  62. GRB/XRF 020427, detection of an underlying system with the VLT
  63. GRB 020531, INT+WFC deep optical upper limits
  64. GRB020405: polarimetric observations
  65. GRB 020531, simultaneous optical observations
  66. GRB 020604, optical observations
  67. GRB 020531/Candidate Redshift
  68. GRB020531: Second epoch Chandra observations
  69. GRB020604, optical observations
  70. GRB020604, BVRcIc field photometry
  71. GRB020603, BVRcIc field observations
  72. GRB020531, BVRcIc field photometry
  73. GRB020531 Optical observations with TAROT
  74. GRB020531 Optical observations with TAROT
  75. GRB 020418, optical/near-IR observations
  76. GRB 020531, Radio Observations
  77. IPN triangulation of GRB020604
  78. GRB020531: Observations with the Chandra X-ray Observatory
  79. GRB 020603: Optical Observations
  80. GRB 020603, R-band observation
  81. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  82. GRB 020603: Optical observations
  83. IPN triangulation of GRB020603 (possible short/hard GRB)
  84. GRB 020531 optical observations with TAROT
  85. Refined IPN error box for GRB020531
  86. GRB020531, optical observations
  87. GRB020531(=H2042): Optical Observations
  88. IPN triangulation of the short, hard GRB020531 (=H2042)
  89. GRB020531(=H2042): Optical Observations
  90. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  91. GRB 020525: Optical Observations
  92. GRB020525, optical observations
  93. IPN detection of possible bursts from SGR1806-20
  94. IPN triangulation of GRB020525
  95. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  96. IPN triangulation of a burst from SGR1806-20
  97. GRB/XRF 020427, Radio Observations
  98. HST detection of the likely host galaxy of GRB 020124
  99. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  100. GRB(XRF) 020427: X-ray afterglow with BeppoSAX

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