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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"

21984 results found.

  1. GRB 080310: ROTSE-III Observations of Optical Counterpart
  2. GRB080310, optical observations with the LBT
  3. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  4. GRB 080310: early RAPTOR multicolor observations
  5. GRB080210: optical observations
  6. GRB 080310 - SDSS Pre-Burst Observations
  7. GRB 080310: RRM optical photometry with the VLT
  8. GRB 080310: VLT/UVES spectroscopy
  9. GRB080310, optical observations with LBT
  10. GRB080310: Super-LOTIS suggestion of brightening
  11. GRB 080310, SMARTS optical/IR afterglow observations
  12. GRB 080310: REM observations
  13. GRB 080310: Magellan redshift
  14. GRB 080307: Swift/UVOT Upper Limits
  15. GRB080307 - SDSS Pre-Burst Observations
  16. GRB 080307: TNT optical observation
  17. GRB080307: Optical upper limits
  18. GRB 080307: Gemini-N i-band observations - candidate afterglow
  19. GRB 080307, Preliminary Swift-BAT refined analysis
  20. GRB 080307: Optical observation with DMC/KANATA
  21. Swift UVOT observations of GRB080229B
  22. GRB 080303A: Faulkes Telescope South optical afterglow observations
  23. GRB 080303
  24. GRB 080229: I-band observations from OSN
  25. GRB 080229: VLT NIR observations
  26. GRB 080229: TNG NIR observations
  27. GRB 080229: Deep Gemini/GMOS optical observations
  28. GRB 080229: REM NIR observations
  29. GRB080229: Possible optical afterglow
  30. GRB 080229: Faulkes Telescope South optical limit
  31. Early optical shallow decay in GRB 071112C
  32. GRB080207: optical observations
  33. GRB080205: optical observations
  34. GRB080211: optical observations
  35. GRB 071010B : Early optical brightening detected by TAOS
  36. Swift-XRT improved positions, and new redshift limits.
  37. ESO optical and NIR observations of GRB 080218B
  38. GRB 080218B: Swift-XRT refined analysis
  39. Swift/UVOT observations of GRB080218B
  40. GRB 080212: Mount Abu NIR observations
  41. GRB 080218B: GROND upper limits
  42. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  43. GRB 080212: VLT optical rapid decay
  44. GRB 080212: REM refined analysis
  45. GRB 080212: Gemini-South optical observations
  46. GRB 080212: GROND detects afterglow
  47. GRB 080212: REM NIR afterglow?
  48. GRB 080212: optical observations
  49. GRB 080210: Keck photometry
  50. GRB 080212: DSS/2MASS Galaxy at XRT position
  51. GRB 080207: VLT NIR early upper limits
  52. GRB 080207: optical observations.
  53. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  54. GRB 080210: Super-LOTIS observations
  55. GRB 080210: Swift-XRT Refined Analysis
  56. GRB 080210: GOND detection in all bands and redshift upper limit
  57. GRB080210 - SDSS Pre-Burst Observations
  58. GRB 080210: TAROT La Silla observatory optical detection
  59. GRB 080207: GROND upper limits
  60. GRB 080207: Optical limits from Gemini-South
  61. GRB 080205: RTT150 optical observations
  62. GRB 080207: Super-LOTIS observations
  63. GRB080207: RTT150 Optical Observations
  64. GRB 080207: REM NIR observations
  65. GRB080207: Swift/UVOT refined analysis
  66. GRB 080207: TAROT Calern observatory optical observations
  67. GRB 080205 optical upper limit
  68. GRB 080205: MASTER optical observation
  69. INT+WFC R-band observations of GRB 080205
  70. GRB 080205: Swift XRT refined analysis
  71. GRB 080205: OA evolution from KAIT observations
  72. GRB 080205: Swift/UVOT observations
  73. GRB 080205: KAIT OA detection
  74. GRB 080130: further Swift XRT observations confirm fading source
  75. GRB 080129: Swift/UVOT Refined Upper Limits
  76. Swift/UVOT observations of GRB080130
  77. GRB 080130: REM NIR observations
  78. GRB 080129: Optical observations from OSN
  79. X-ray transient in NGC 2770: RTT150 optical observations
  80. GRB 080129: KAIT optical limits
  81. GRB 080129: TAROT La Silla observatory optical observations
  82. GRB 080129: Gemini-South photometry
  83. GRB 080129: GROND detection in all bands, and fading
  84. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  85. GRB 080129: Gemini-South Imaging Observations
  86. A new website of high-level data products for Swift GRBs
  87. GRB 080121: Swift/UVOT upper limits
  88. Transient 080109/SN 2008D: Spectroscopic Evolution and Re-Classification
  89. GRB 080123: Swift/UVOT refined analysis
  90. X-ray transient in NGC 2770: RTT150 optical observations
  91. GRB 080120: GROND confirmation of the optical afterglow
  92. UVOT detection of GRB080120
  93. GRB 080120: GROND detection
  94. XRF 080109 / SN 2008D: 1.4 GHz WSRT Radio Observations
  95. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  96. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  97. XRF 080109 / SN 2008D: WSRT Radio Detection
  98. Transient 080109/ SN 2008D, metallicity of the host galaxy
  99. Transient 080109/ SN 2008D, IR Spectrum
  100. XRF 080109 / SN 2008D: optical observations

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