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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"

21018 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. GRB 080310: Magellan redshift revision
  11. GRB080310: Super-LOTIS suggestion of brightening
  12. GRB 080310, SMARTS optical/IR afterglow observations
  13. GRB 080310: REM observations
  14. GRB 080310: Magellan redshift
  15. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  16. GRB 080307: Swift/UVOT Upper Limits
  17. GRB080307 - SDSS Pre-Burst Observations
  18. GRB 080307: TNT optical observation
  19. GRB080307: Optical upper limits
  20. GRB 080307: Gemini-N i-band observations - candidate afterglow
  21. GRB 080307, Preliminary Swift-BAT refined analysis
  22. GRB 080307: Optical observation with DMC/KANATA
  23. Swift UVOT observations of GRB080229B
  24. GRB 080303A: Faulkes Telescope South optical afterglow observations
  25. GRB 080303
  26. GRB 080229: I-band observations from OSN
  27. GRB 080229: VLT NIR observations
  28. GRB 080229: TNG NIR observations
  29. GRB 080229: Deep Gemini/GMOS optical observations
  30. GRB 080229: REM NIR observations
  31. GRB080229: Possible optical afterglow
  32. GRB 080229: Faulkes Telescope South optical limit
  33. Early optical shallow decay in GRB 071112C
  34. GRB080207: optical observations
  35. GRB080205: optical observations
  36. GRB080211: optical observations
  37. GRB 071010B : Early optical brightening detected by TAOS
  38. Swift-XRT improved positions, and new redshift limits.
  39. ESO optical and NIR observations of GRB 080218B
  40. GRB 080218B: Swift-XRT refined analysis
  41. Swift/UVOT observations of GRB080218B
  42. GRB 080212: Mount Abu NIR observations
  43. GRB 080218B: GROND upper limits
  44. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  45. GRB 080212: VLT optical rapid decay
  46. GRB 080212: REM refined analysis
  47. GRB 080212: Gemini-South optical observations
  48. GRB 080212: GROND detects afterglow
  49. GRB 080212: optical observations
  50. GRB 080207: VLT NIR early upper limits
  51. GRB 080207: optical observations.
  52. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  53. GRB 080210: Super-LOTIS observations
  54. GRB 080210: Swift-XRT Refined Analysis
  55. GRB 080210: GOND detection in all bands and redshift upper limit
  56. GRB080210 - SDSS Pre-Burst Observations
  57. GRB 080210: TAROT La Silla observatory optical detection
  58. GRB 080207: GROND upper limits
  59. GRB 080205: RTT150 optical observations
  60. GRB 080207: Super-LOTIS observations
  61. GRB080207: RTT150 Optical Observations
  62. GRB 080207: REM NIR observations
  63. GRB080207: Swift/UVOT refined analysis
  64. GRB 080207: TAROT Calern observatory optical observations
  65. GRB 080205 optical upper limit
  66. GRB 080205: MASTER optical observation
  67. INT+WFC R-band observations of GRB 080205
  68. GRB 080205: Swift XRT refined analysis
  69. GRB 080205: OA evolution from KAIT observations
  70. GRB 080205: Swift/UVOT observations
  71. GRB 080205: KAIT OA detection
  72. GRB 080130: further Swift XRT observations confirm fading source
  73. GRB 080129: Swift/UVOT Refined Upper Limits
  74. Swift/UVOT observations of GRB080130
  75. GRB 080130: REM NIR observations
  76. GRB 080129: Optical observations from OSN
  77. X-ray transient in NGC 2770: RTT150 optical observations
  78. GRB 080129: KAIT optical limits
  79. GRB 080129: TAROT La Silla observatory optical observations
  80. GRB 080129: Gemini-South photometry
  81. GRB 080129: GROND detection in all bands, and fading
  82. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  83. GRB 080129: Gemini-South Imaging Observations
  84. A new website of high-level data products for Swift GRBs
  85. GRB 080121: Swift/UVOT upper limits
  86. GRB 080123: Swift/UVOT refined analysis
  87. X-ray transient in NGC 2770: RTT150 optical observations
  88. GRB 080120: GROND confirmation of the optical afterglow
  89. UVOT detection of GRB080120
  90. GRB 080120: GROND detection
  91. XRF 080109 / SN 2008D: 1.4 GHz WSRT Radio Observations
  92. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  93. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  94. XRF 080109 / SN 2008D: WSRT Radio Detection
  95. Transient 080109/ SN 2008D, IR Spectrum
  96. XRF 080109 / SN 2008D: optical observations
  97. NGC 2770B has the same redshift as NGC 2770
  98. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  99. optical observations, XRT in NGC 2770
  100. XRF 080109/SN 2008D: PROMPT Optical Imaging

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