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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"

36195 results found.

  1. GRB020819: optical observations
  2. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  3. IPN triangulation of GRB020819 (HETE 2275)
  4. GRB020813, UBVRI field calibration
  5. GRB 020813: addendum to GCN 1498
  6. GRB020813: optical observations at Bisei
  7. GRB020813: V-band decay slope
  8. Polarimetry of GRB020813: evidence for variability
  9. GRB020813 IRAM millimeter observations
  10. GRB020812: optical observations
  11. GRB 020812: optical observation at Bisei
  12. GRB020813: optical observations; possible host galaxy
  13. GRB 020813, radio detection
  14. GRB 020812 : optical afterglow candidate
  15. Millimeter observation of GRB 020813
  16. GRB020812: optical observations
  17. GRB 020813 : KISO multiband optical observations
  18. IPN error box for GRB020813
  19. IPN triangulation of GRB020813
  20. GRB020812: possible afterglow candidate
  21. Early Time Limits for GRB020813
  22. GRB020812: possible afterglow candidate
  23. GRB020813, astrometric position
  24. Spectropolarimetry of GRB 020813
  25. GRB 020813 Afterglow Observations; Possible break
  26. GRB 020813: Absorption redshift
  27. GRB 020813 multiband optical observations
  28. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  29. GRB 020812 optical observation
  30. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  31. GRB 020715, optical observations
  32. GRB 020714, optical observations
  33. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  34. HST Imaging of the Host of GRB 011121
  35. GRB020801, optical afterglow candidate
  36. Further refinement to IPN error box for GRB020531
  37. GRB020331: Late-time Optical Light Curve (re-submission)
  38. GRB020331: Late-time Optical Light Curve
  39. GRB 020405: HST observations reveal red bump
  40. IPN triangulation of GRB020714
  41. IPN triangulation of GRB020715 (=GRB150702)
  42. IPN triangulation of GRB020714
  43. IPN triangulation of GRB150702
  44. GRB 020410: Discovery of Probable OT by HST
  45. GRB 020124, HST observations of the fading afterglow
  46. IPN triangulation of GRB020708
  47. IPN triangulation of GRB020708
  48. IPN error box for GRB020706
  49. IPN triangulation of GRB020706
  50. GRB 020705: Optical observations
  51. GRB 020625, optical observations
  52. GRB 020625: Optical observations
  53. GRB 020531: optical photometry of Chandra sources
  54. GRB020625 (=H2081): A Long Burst Localized by HETE
  55. The Probable Host Galaxy of GRB/XRF 020427
  56. GRB/XRF 020427, detection of an underlying system with the VLT
  57. GRB 020531, INT+WFC deep optical upper limits
  58. GRB020405: polarimetric observations
  59. GRB 020531, simultaneous optical observations
  60. GRB 020604, optical observations
  61. GRB 020531/Candidate Redshift
  62. GRB020531: Second epoch Chandra observations
  63. GRB020604, optical observations
  64. GRB020604, BVRcIc field photometry
  65. GRB020603, BVRcIc field observations
  66. GRB020531, BVRcIc field photometry
  67. GRB020531 Optical observations with TAROT
  68. GRB020531 Optical observations with TAROT
  69. GRB 020418, optical/near-IR observations
  70. GRB 020531, Radio Observations
  71. IPN triangulation of GRB020604
  72. GRB020531: Observations with the Chandra X-ray Observatory
  73. GRB 020603: Optical Observations
  74. GRB 020603, R-band observation
  75. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  76. GRB 020603: Optical observations
  77. IPN triangulation of GRB020603 (possible short/hard GRB)
  78. GRB 020531 optical observations with TAROT
  79. Refined IPN error box for GRB020531
  80. GRB020531, optical observations
  81. GRB020531(=H2042): Optical Observations
  82. IPN triangulation of the short, hard GRB020531 (=H2042)
  83. GRB020531(=H2042): Optical Observations
  84. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  85. GRB 020525: Optical Observations
  86. GRB020525, optical observations
  87. IPN detection of possible bursts from SGR1806-20
  88. IPN triangulation of GRB020525
  89. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  90. IPN triangulation of a burst from SGR1806-20
  91. GRB/XRF 020427, Radio Observations
  92. HST detection of the likely host galaxy of GRB 020124
  93. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  94. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  95. GRB020321 : Optical observations.
  96. GRB020427 BeppoSAX NFI Observation
  97. XRF 020427
  98. GRB020331: Third Epoch and Revised Second Epoch Optical
  99. The end of BSAX GRB activities
  100. GRB 020410, Radio Observations

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