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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"

32711 results found.

  1. Confirming no variability for GRB02081
  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. HETE 2275: Optical observations
  10. GRB020813: optical and NIR observations
  11. GRB020813, UBVRI field calibration
  12. GRB 020813: addendum to GCN 1498
  13. GRB020813: optical observations at Bisei
  14. GRB020813: V-band decay slope
  15. GRB020812: NIR observations
  16. Polarimetry of GRB020813: evidence for variability
  17. GRB020813 IRAM millimeter observations
  18. GRB020813: High-Resolution Optical Observations
  19. GRB020813(=H2262): Revised Localization with HETE SXC
  20. GRB 020812: optical observation at Bisei
  21. GRB020813: Early Time Magnitude
  22. GRB020813: optical observations; possible host galaxy
  23. GRB 020813, radio detection
  24. GRB020813, optical observations
  25. Millimeter observation of GRB 020813
  26. GRB020812: optical observations
  27. GRB 020813 : KISO multiband optical observations
  28. GRB020813, optical observations
  29. IPN error box for GRB020813
  30. IPN triangulation of GRB020813
  31. GRB020812: possible afterglow candidate
  32. Early Time Limits for GRB020813
  33. GRB020813, astrometric position
  34. Spectropolarimetry of GRB 020813
  35. GRB 020813 Afterglow Observations; Possible break
  36. GRB 020813: Absorption redshift
  37. GRB020813: optical afterglow
  38. GRB020813: Fading of Candidate OT
  39. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  40. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  41. GRB 020715, optical observations
  42. GRB 020714, optical observations
  43. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  44. GRB020801: Candidate OT present in DSS
  45. Further refinement to IPN error box for GRB020531
  46. GRB020331: Late-time Optical Light Curve (re-submission)
  47. GRB020331: Late-time Optical Light Curve
  48. GRB 020405: HST observations reveal red bump
  49. IPN triangulation of GRB020714
  50. IPN triangulation of GRB020715 (=GRB150702)
  51. GRB 020410: Discovery of Probable OT by HST
  52. GRB 020124, HST observations of the fading afterglow
  53. IPN triangulation of GRB020708
  54. IPN triangulation of GRB020708
  55. IPN error box for GRB020706
  56. Correction to IPN error box for GRB020706
  57. IPN triangulation of GRB020706
  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. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  64. AXP 1E2259+586: quasi-simultaneous optical observation
  65. AXP 1E2259+586 optical observations
  66. Fading Optical Source in the Field of GRB020531
  67. GRB 020531, INT+WFC deep optical upper limits
  68. GRB020405: polarimetric observations
  69. GRB 020531, simultaneous optical observations
  70. GRB 020604, optical observations
  71. GRB 020531/Candidate Redshift
  72. GRB020531: Detection of Candidate Host Galaxy
  73. GRB020531: Second epoch Chandra observations
  74. GRB020604, optical observations
  75. GRB020604, BVRcIc field photometry
  76. GRB020603, BVRcIc field observations
  77. GRB020531, BVRcIc field photometry
  78. GRB020531 Optical observations with TAROT
  79. GRB020531 Optical observations with TAROT
  80. GRB 020531, Radio Observations
  81. GRB020531 Optical Observations
  82. GRB 020603: Optical Observations
  83. GRB 020603, R-band observation
  84. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  85. GRB020531: Upper Limit for Detection of Two TAROT Sources
  86. GRB 020603: Optical observations
  87. GRB 020531 optical observations with TAROT
  88. Refined IPN error box for GRB020531
  89. GRB020531, optical observations
  90. GRB020531: optical observations
  91. GRB020531(=H2042): Optical Observations
  92. IPN triangulation of the short, hard GRB020531 (=H2042)
  93. GRB020531(=H2042): Optical Observations
  94. GRB020531: Optical observations
  95. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  96. GRB 020525: Optical Observations
  97. GRB020525, optical observations
  98. IPN detection of possible bursts from SGR1806-20
  99. XRF 020427: Sudden Ionospheric Disturbance (SID)
  100. XRF020427: Chandra Identification of a Likely X-ray Counterpart

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