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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"

16026 results found.

  1. GRB 111228A: possible detection of the SN with the TNG
  2. GRB 120312A: CrAO optical upper limit
  3. GRB 120311A: Optical follow-up
  4. GRB 120311B: Optical follow-up
  5. GRB 120311A: C88 optical limits
  6. GRB 120312A: Swift/UVOT Upper Limits
  7. GRB 120312A: MASTER-NET optical observations
  8. GRB 120312A: NOT observations
  9. GRB 120311A: VLT/X-shooter observations
  10. GRB 120311B: C88 optical limits
  11. GRB 120311B: Swift/UVOT Upper Limits
  12. GRB 120311B: MITSuME Okayama Optical upper limits
  13. GRB 120311A: Swift/UVOT Upper Limits
  14. GRB 120311A: CAHA 1.23m I-band early observations
  15. GRB 120311A: Liverpool Telescope optical candidate
  16. GRB 120308A : LOAO optical observation
  17. GRB 120308A: RTT150 optical observations
  18. GRB 120302A: RTT150 optical observations
  19. GRB 120308A: 1.23m CAHA I-band observations
  20. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  21. GRB 120308A: Swift/UVOT Detection
  22. GRB 120308A: IAC80 I-band observations
  23. GRB 120308A: confirmation of the optical afterglow
  24. GRB 120308A: Liverpool Telescope optical afterglow candidate
  25. GRB 120305A: D50 optical limits
  26. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  27. GRB 120305A: Swift/UVOT Upper Limits
  28. GRB 120305A - Liverpool Telescope Observations
  29. GRB 120305A: MASTER-NET early optical observations
  30. GRB 120302A: GROND detection of an afterglow candidate
  31. GRB 120227A: RAPTOR Limit During the Gamma-Ray Emitting Interval
  32. GRB 120224A: optical observation in Mondy observatory
  33. GRB 120224A: Swift/UVOT Upper Limits
  34. GRB 120224A: FTN optical observations
  35. GRB 1202019A: optical observation in Mondy observatory
  36. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  37. GRB 120219A: 1.23m CAHA optical observations
  38. GCN 12974 : Errata in the Subject
  39. GRB 120219A, optical observations
  40. GRB 120215A: MITSuME Akeno Optical upper limits
  41. GRB 120219A: Swift/UVOT Upper Limits
  42. GRB 120219A: MITSuME Okayama Optical upper limits
  43. GRB120219A: TNT optical afterglow candidates
  44. GRB 120219A: MASTER-NET prompt and early optical observations
  45. GRB 120215A: Swift/UVOT Upper Limits
  46. GRB 120215A: MITSuME Okayama Optical upper limits
  47. Skynet/PROMPT observations of GRB120215A
  48. GRB 120211A : LOAO optical observations
  49. GRB 120213A: Swift/UVOT Upper Limits
  50. GRB 120212A: GMG optical observation
  51. GRB 120212A: MITSuME Ishigakijima Optical Observation
  52. GRB 120213A: MASTER-NET early optical observations
  53. GRB 120212A: NOT optical observation
  54. GRB 120212A: Kanata/HOWPol optical observation
  55. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  56. GRB 120211A, optical observations
  57. GRB 120211A: Swift/UVOT Upper Limits
  58. GRB 120211A: MASTER early optical observations
  59. GRB 120211A - Faulkes Telescope South Observations
  60. GRB 120202A: MASTER early optical observations
  61. GRB 120202A: D50 optical limits
  62. GRB 120202A: GROND observations
  63. GRB 120202A: Swift/XRT and UVOT observations
  64. GRB 120202A: TAROT Calern observatory optical observations
  65. GRB 120129A: MASTER optical observations
  66. GRB 120127A / P48 Imaging
  67. GRB 120127A: MASTER optical observations
  68. GRB 120118B: optical upper limit
  69. GRB 120116A: optical upper limit
  70. GRB 120119A : LOAO Optical Observations
  71. GRB 120119A: EVLA observations
  72. GRB 120119A: GRT detection of early afterglow
  73. GRB 111225A: optical observations
  74. GRB 120119A: optical upper limit
  75. GRB 120121A: Swift/UVOT Upper Limits
  76. GRB 120121A: ISON-NM optical observations
  77. GRB 120119A: TAROT La Silla observatory optical observations
  78. GRB120119A: REM NIR observations
  79. GRB 120119A: optical observations
  80. GRB 120118B: RTT150 optical observations
  81. GRB 120119A: SMARTS optical/IR afterglow observations
  82. GRB 120119A: optical observations
  83. GRB 120118B : Lulin Optical limit
  84. GRB 120119A: MMT redshift confirmation
  85. GRB 120119A: Gemini-S redshift
  86. GRB 120119A: PROMPT optical observation of early afterglow
  87. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  88. GRB 120118B: Swift/UVOT Upper Limits
  89. GRB 120119A: PAIRITEL NIR Detection
  90. GRB 120119A: Swift detection of a burst with an optical counterpart
  91. GRB 120118B: NOT observations
  92. XRF 120118A: early optical limit by "Pi of the Sky"
  93. GRB 120118B: MASTER optical observations
  94. XRF 120118A: Optical candidate
  95. GRB 120116A: Swift/UVOT Upper Limits
  96. AXP 4U 1042+61: Mondy optical observations
  97. GRB 120116A: Mondy optical observations
  98. GRB 120116A: Gemini optical/IR candidate
  99. GRB 120116A: WHT optical observations
  100. GRB 120116A: Optical observations at Crni Vrh

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