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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"

21089 results found.

  1. GRB 080229: REM NIR observations
  2. GRB080229: Possible optical afterglow
  3. GRB 080229: Faulkes Telescope South optical limit
  4. Early optical shallow decay in GRB 071112C
  5. GRB080207: optical observations
  6. GRB080205: optical observations
  7. GRB080211: optical observations
  8. GRB 071010B : Early optical brightening detected by TAOS
  9. Swift-XRT improved positions, and new redshift limits.
  10. ESO optical and NIR observations of GRB 080218B
  11. GRB 080218B: Swift-XRT refined analysis
  12. Swift/UVOT observations of GRB080218B
  13. GRB 080212: Mount Abu NIR observations
  14. GRB 080218B: GROND upper limits
  15. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  16. GRB 080212: VLT optical rapid decay
  17. GRB 080212: REM refined analysis
  18. GRB 080212: Gemini-South optical observations
  19. GRB 080212: GROND detects afterglow
  20. GRB 080212: optical observations
  21. GRB 080207: VLT NIR early upper limits
  22. GRB 080207: optical observations.
  23. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  24. GRB 080210: Super-LOTIS observations
  25. GRB 080210: Swift-XRT Refined Analysis
  26. GRB 080210: GOND detection in all bands and redshift upper limit
  27. GRB080210 - SDSS Pre-Burst Observations
  28. GRB 080210: TAROT La Silla observatory optical detection
  29. GRB 080207: GROND upper limits
  30. GRB 080205: RTT150 optical observations
  31. GRB 080207: Super-LOTIS observations
  32. GRB080207: RTT150 Optical Observations
  33. GRB 080207: REM NIR observations
  34. GRB080207: Swift/UVOT refined analysis
  35. GRB 080207: TAROT Calern observatory optical observations
  36. GRB 080205 optical upper limit
  37. GRB 080205: MASTER optical observation
  38. INT+WFC R-band observations of GRB 080205
  39. GRB 080205: Swift XRT refined analysis
  40. GRB 080205: OA evolution from KAIT observations
  41. GRB 080205: Swift/UVOT observations
  42. GRB 080205: KAIT OA detection
  43. GRB 080130: further Swift XRT observations confirm fading source
  44. GRB 080129: Swift/UVOT Refined Upper Limits
  45. Swift/UVOT observations of GRB080130
  46. GRB 080130: REM NIR observations
  47. GRB 080129: Optical observations from OSN
  48. X-ray transient in NGC 2770: RTT150 optical observations
  49. GRB 080129: KAIT optical limits
  50. GRB 080129: TAROT La Silla observatory optical observations
  51. GRB 080129: Gemini-South photometry
  52. GRB 080129: GROND detection in all bands, and fading
  53. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  54. GRB 080129: Gemini-South Imaging Observations
  55. A new website of high-level data products for Swift GRBs
  56. GRB 080121: Swift/UVOT upper limits
  57. GRB 080123: Swift/UVOT refined analysis
  58. X-ray transient in NGC 2770: RTT150 optical observations
  59. GRB 080120: GROND confirmation of the optical afterglow
  60. UVOT detection of GRB080120
  61. GRB 080120: GROND detection
  62. XRF 080109 / SN 2008D: 1.4 GHz WSRT Radio Observations
  63. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  64. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  65. XRF 080109 / SN 2008D: WSRT Radio Detection
  66. Transient 080109/ SN 2008D, IR Spectrum
  67. XRF 080109 / SN 2008D: optical observations
  68. NGC 2770B has the same redshift as NGC 2770
  69. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  70. optical observations, XRT in NGC 2770
  71. XRF 080109/SN 2008D: PROMPT Optical Imaging
  72. Gemini-South observations of XRF 080109 / SN 2008D
  73. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  74. Discovery of Radio Emission from Transient in NGC 2770
  75. XRF 080109 in NGC2770: NIR observations at TNG
  76. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  77. XRF 080109 in NGC2770: Detectable Superluminal Motion
  78. XRF in NGC 2770: Search for X-ray periodicity
  79. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  80. Opticall follow-ups for the X-ray transient in NGC 2770
  81. X-ray transient in NGC 2770: Optical observations with Astrotel-Caucasus
  82. Swift UVOT Observations of the X-ray transient in NGC 2770
  83. Possible XRF in NGC 2770 - NOT observations of the optical counterpart
  84. Bright X-ray Transient (a XRF? ) in NGC 2770 - A SN optical counterpart?
  85. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  86. GRB 071227: optical afterglow
  87. GRB 071227: Magellan redshift confirmation
  88. GRB 071227: Magellan observations
  89. GRB071227: Swift/UVOT refined analysis
  90. GRB 071227: REM NIR and Optical observations
  91. GRB071020: optical observations
  92. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  93. GRB 071129: Swift detection of a burst
  94. Konus-Wind and Konus-A observations of GRB 071125
  95. GRB 071112C: Optical/NIR observations
  96. VLA radio detection of GRB 071122
  97. GRB071122: Swift/UVOT Observations
  98. GRB071104: NIR Afterglow Candidate at TNG
  99. GRB 071122: MASTER optical observation
  100. GRB 071122 Swift-XRT refined analysis

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