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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"

22198 results found.

  1. GRB020812: optical observations
  2. GRB020813: High-Resolution Optical Observations
  3. GRB 020812: optical observation at Bisei
  4. GRB020813: optical observations; possible host galaxy
  5. GRB 020813, radio detection
  6. GRB 020812 : optical afterglow candidate
  7. GRB020813, optical observations
  8. Millimeter observation of GRB 020813
  9. GRB020812: optical observations
  10. GRB 020813 : KISO multiband optical observations
  11. GRB020813, optical observations
  12. GRB 020813 Afterglow Observations; Possible break
  13. GRB 020813 multiband optical observations
  14. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  15. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  16. GRB 020715, optical observations
  17. GRB 020714, optical observations
  18. GRB020801: Candidate OT present in DSS
  19. HST Imaging of the Host of GRB 011121
  20. GRB020331: Late-time Optical Light Curve (re-submission)
  21. GRB020331: Late-time Optical Light Curve
  22. GRB 020405: HST observations reveal red bump
  23. GRB 020410: Discovery of Probable OT by HST
  24. GRB 020124, HST observations of the fading afterglow
  25. GRB 020705: Optical observations
  26. GRB 020625, optical observations
  27. GRB 020625: Optical observations
  28. GRB 020531: optical photometry of Chandra sources
  29. HETE #2081: Optical observations
  30. The Probable Host Galaxy of GRB/XRF 020427
  31. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  32. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  33. AXP 1E2259+586 optical observations
  34. Fading Optical Source in the Field of GRB020531
  35. GRB 020531, INT+WFC deep optical upper limits
  36. SGR-like Bursts from the AXP 1E 2259+586
  37. GRB020405: polarimetric observations
  38. GRB 020531, simultaneous optical observations
  39. GRB 020604, optical observations
  40. GRB 020531/Candidate Redshift
  41. GRB020531: Second epoch Chandra observations
  42. GRB020604, optical observations
  43. GRB020603, BVRcIc field observations
  44. GRB020531 Optical observations with TAROT
  45. GRB020531 Optical observations with TAROT
  46. GRB 020418, optical/near-IR observations
  47. GRB 020531, Radio Observations
  48. GRB020531 Optical Observations
  49. GRB020531: Observations with the Chandra X-ray Observatory
  50. GRB 020603: Optical Observations
  51. GRB020531: Upper Limit for Detection of Two TAROT Sources
  52. GRB 020603: Optical observations
  53. GRB 020531 optical observations with TAROT
  54. GRB020531, optical observations
  55. GRB020531: optical observations
  56. GRB020531(=H2042): Optical Observations
  57. GRB020531(=H2042): Optical Observations
  58. GRB020531: Optical observations
  59. GRB 020525: Optical Observations
  60. GRB020525, optical observations
  61. XRF 020427: Sudden Ionospheric Disturbance (SID)
  62. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  63. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  64. GRB/XRF 020427, Radio Observations
  65. HST detection of the likely host galaxy of GRB 020124
  66. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  67. GRB020321 : Optical observations.
  68. GRB020427 BeppoSAX NFI Observation
  69. XRF 020427
  70. GRB020331: Third Epoch and Revised Second Epoch Optical
  71. GRB 020410, Radio Observations
  72. GRB 020418: Optical observations
  73. GRB 020124: Optical observations
  74. GRB 020418: Optical observations
  75. GRB020405: VLT observations of the OT environment
  76. GRB020410: BeppoSAX NFI observations refined analysis
  77. GRB 020409: Optical Observations
  78. Mars Odyssey joins the IPN
  79. GRB 020409, 2-nd epoch optical observations at Terskol.
  80. GRB020405: predicted break
  81. GRB 020409: Optical observations
  82. GRB 020409, 2nd epoch optical observations
  83. GRB 020409
  84. GRB 020409 SARA Observations
  85. GRB "020411"
  86. GRB 020409: Optical observations
  87. GRB 020410, optical observations
  88. GRB 020409, optical observations
  89. GRB 020409: Optical Observations
  90. GRB020406(?), optical observations
  91. GRB020410, optical observations
  92. GRB020331: Confirmation of Afterglow Candidate with Magellan
  93. GRB020405: VLT optical observations and V band decay slope
  94. GRB020331 optical observations with RIMOTS
  95. GRB020124 optical observations with RIBOTS/RIMOTS
  96. GRB 020405: Moderate-resolution spectroscopy
  97. GRB020331: Optical Observations of Afterglow Candidate
  98. GRB020406(?), optical observations
  99. GRB020405: VLT optical observations
  100. GRB020405: OT observations

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