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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"

32690 results found.

  1. GRB020813: optical observations; possible host galaxy
  2. GRB 020813, radio detection
  3. GRB020813, optical observations
  4. Millimeter observation of GRB 020813
  5. GRB020812: optical observations
  6. GRB 020813 : KISO multiband optical observations
  7. GRB020813, optical observations
  8. IPN error box for GRB020813
  9. IPN triangulation of GRB020813
  10. GRB020812: possible afterglow candidate
  11. Early Time Limits for GRB020813
  12. GRB020813, astrometric position
  13. Spectropolarimetry of GRB 020813
  14. GRB 020813 Afterglow Observations; Possible break
  15. GRB 020813: Absorption redshift
  16. GRB020813: optical afterglow
  17. GRB020813: Fading of Candidate OT
  18. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  19. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  20. GRB 020715, optical observations
  21. GRB 020714, optical observations
  22. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  23. GRB020801: Candidate OT present in DSS
  24. Further refinement to IPN error box for GRB020531
  25. GRB020331: Late-time Optical Light Curve (re-submission)
  26. GRB020331: Late-time Optical Light Curve
  27. GRB 020405: HST observations reveal red bump
  28. IPN triangulation of GRB020714
  29. IPN triangulation of GRB020715 (=GRB150702)
  30. GRB 020410: Discovery of Probable OT by HST
  31. GRB 020124, HST observations of the fading afterglow
  32. IPN triangulation of GRB020708
  33. IPN triangulation of GRB020708
  34. IPN error box for GRB020706
  35. Correction to IPN error box for GRB020706
  36. IPN triangulation of GRB020706
  37. GRB 020625, optical observations
  38. GRB 020531: optical photometry of Chandra sources
  39. GRB020625 (=H2081): A Long Burst Localized by HETE
  40. The Probable Host Galaxy of GRB/XRF 020427
  41. GRB/XRF 020427, detection of an underlying system with the VLT
  42. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  43. AXP 1E2259+586: quasi-simultaneous optical observation
  44. AXP 1E2259+586 optical observations
  45. Fading Optical Source in the Field of GRB020531
  46. GRB 020531, INT+WFC deep optical upper limits
  47. GRB020405: polarimetric observations
  48. GRB 020531, simultaneous optical observations
  49. GRB 020604, optical observations
  50. GRB 020531/Candidate Redshift
  51. GRB020531: Detection of Candidate Host Galaxy
  52. GRB020531: Second epoch Chandra observations
  53. GRB020604, optical observations
  54. GRB020604, BVRcIc field photometry
  55. GRB020603, BVRcIc field observations
  56. GRB020531, BVRcIc field photometry
  57. GRB020531 Optical observations with TAROT
  58. GRB020531 Optical observations with TAROT
  59. GRB 020531, Radio Observations
  60. GRB020531 Optical Observations
  61. GRB 020603: Optical Observations
  62. GRB 020603, R-band observation
  63. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  64. GRB020531: Upper Limit for Detection of Two TAROT Sources
  65. GRB 020603: Optical observations
  66. GRB 020531 optical observations with TAROT
  67. Refined IPN error box for GRB020531
  68. GRB020531, optical observations
  69. GRB020531: optical observations
  70. GRB020531(=H2042): Optical Observations
  71. IPN triangulation of the short, hard GRB020531 (=H2042)
  72. GRB020531(=H2042): Optical Observations
  73. GRB020531: Optical observations
  74. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  75. GRB 020525: Optical Observations
  76. GRB020525, optical observations
  77. IPN detection of possible bursts from SGR1806-20
  78. XRF 020427: Sudden Ionospheric Disturbance (SID)
  79. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  80. GRB/XRF 020427, Radio Observations
  81. HST detection of the likely host galaxy of GRB 020124
  82. GRB020405 field photometry at ESO
  83. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  84. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  85. GRB020321 : Optical observations.
  86. GRB020331: Third Epoch and Revised Second Epoch Optical
  87. GRB 020410, Radio Observations
  88. GRB 020418: Optical observations
  89. GRB 020124: Optical observations
  90. GRB 020418: Optical observations
  91. GRB020405: VLT observations of the OT environment
  92. GRB020410: BeppoSAX NFI observations refined analysis
  93. GRB 020409: Optical Observations
  94. Mars Odyssey joins the IPN
  95. GRB 020409, 2-nd epoch optical observations at Terskol.
  96. GRB020405: predicted break
  97. GRB 020409: Optical observations
  98. GRB 020409, No Optical Detection to R = 22
  99. GRB 020409: No Evidence for an Optical Afterglow
  100. GRB 020409, 2nd epoch optical observations

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