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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

24666 results found.

  1. GRB020801, optical afterglow candidate
  2. GRB020331: Late-time Optical Light Curve (re-submission)
  3. GRB020331: Late-time Optical Light Curve
  4. IPN triangulation of GRB020714
  5. IPN triangulation of GRB020715 (=GRB150702)
  6. IPN triangulation of GRB020714
  7. IPN triangulation of GRB150702
  8. GRB 020410: Discovery of Probable OT by HST
  9. GRB 020124, HST observations of the fading afterglow
  10. IPN triangulation of GRB020708
  11. IPN triangulation of GRB020708
  12. Correction to IPN error box for GRB020706
  13. IPN triangulation of GRB020706
  14. GRB 020705: Optical observations
  15. GRB 020625, optical observations
  16. GRB 020625: Optical observations
  17. GRB 020531: optical photometry of Chandra sources
  18. GRB020625 (=H2081): A Long Burst Localized by HETE
  19. The Probable Host Galaxy of GRB/XRF 020427
  20. GRB/XRF 020427, detection of an underlying system with the VLT
  21. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  22. AXP 1E2259+586 optical observations
  23. Fading Optical Source in the Field of GRB020531
  24. GRB 020531, INT+WFC deep optical upper limits
  25. SGR-like Bursts from the AXP 1E 2259+586
  26. GRB020405: polarimetric observations
  27. GRB 020531, simultaneous optical observations
  28. GRB 020531/Candidate Redshift
  29. GRB020531: Detection of Candidate Host Galaxy
  30. GRB020531: Second epoch Chandra observations
  31. GRB020604, optical observations
  32. GRB020604, BVRcIc field photometry
  33. GRB020603, BVRcIc field observations
  34. GRB020531, BVRcIc field photometry
  35. GRB020531 Optical Observations
  36. GRB020531: Observations with the Chandra X-ray Observatory
  37. GRB020531, optical observations
  38. GRB020531: optical observations
  39. GRB020531(=H2042): Optical Observations
  40. GRB020531(=H2042): Optical Observations
  41. GRB020531: Optical observations
  42. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  43. GRB020525, optical observations
  44. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  45. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  46. HST detection of the likely host galaxy of GRB 020124
  47. GRB020405 field photometry at ESO
  48. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  49. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  50. GRB020321 : Optical observations.
  51. XRF 020427
  52. GRB 020124: Optical observations
  53. IPN triangulation of GRB020418
  54. GRB020405: VLT observations of the OT environment
  55. IPN triangulation of GRB020413
  56. GRB020405: predicted break
  57. GRB 020409: No Evidence for an Optical Afterglow
  58. GRB 020331 Kyoto observation on March 31
  59. GRB020410: BeppoSAX NFI observation
  60. X-ray afterglow of GRB020321
  61. GRB020331 optical observations with RIMOTS
  62. GRB020124 optical observations with RIBOTS/RIMOTS
  63. GRB 020321: Candidate X-ray Counterparts
  64. GRB020406(?), optical observations
  65. GRB 020405: Decay index
  66. Short RXTE/ASM transient 020406; may be a GRB
  67. GRB020405, Radio Observations
  68. GRB 020405, U-band observations
  69. GRB011212: Optical Observations
  70. GRB 020331: NIR Observations
  71. GRB020331 NIR observation at KPNO (re-submission)
  72. GRB02033 NIR observation at KPNO
  73. GRB020331 field photometry
  74. GRB 020331, NIR observations
  75. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  76. GRB 020322: BeppoSAX observations of the X-ray afterglow
  77. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  78. Near-Infrared Observations of GRB020322 at TIRGO
  79. GRB 020321, Radio Observations
  80. GRB 020322: Optical Observations
  81. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  82. GRB 020321: Optical observations
  83. GRB020317 BVRI field photometry
  84. GRB011211 revised BVRI field photometry
  85. GRB020305 BVRI field photometry
  86. GRB020322 BVRI field photometry
  87. GRB 020322: Optical Sources and Improved Astrometry
  88. GRB020317: optical observations
  89. GRB020321 optical observations
  90. GRB020321: a faint BeppoSAX detection
  91. GRB 020317 : KISO Optical Observations
  92. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  93. GRB 020305: Optical Observations
  94. GRB020317, optical observations
  95. GRB 020317: Optical observations
  96. GRB 011121: Third HST Epoch
  97. GRB020305: Properties of the Candidate Optical Afterglow
  98. GRB 011121: HST Observations reveal an intermediate-time multicolor
  99. GRB011130 (XRF011130) Second Epoch Chandra Observations
  100. GRB020305: Subaru Optical Observations

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