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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"

16096 results found.

  1. GRB 120403B: Swift/UVOT Upper Limits
  2. GRB 120402A: optical upper limit
  3. GRB 120320A: optical upper limit in Mondy observatory
  4. GRB 120320A: early optical upper limit
  5. GRB 120403A: MASTER follow up observations
  6. GRB 120402A: MASTER follow up observations
  7. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  8. GRB 120326A: Cima Rest and Bassano Brescia
  9. GRB 120327A: SMARTS optical/IR afterglow observations
  10. GRB 120326A: HCT optical observations
  11. GRB 120326A: EVLA Observations
  12. GRB120327A - ATCA radio afterglow detection at 34GHz
  13. GRB 120324A: CrAO optical upper limit
  14. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  15. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  16. GRB 120326A: CARMA 3mm detection
  17. GRB 120326A: Bassano Bresciano Observatory optical observations
  18. GRB 120328A: MITSuME Ishigakijima Optical Upper Limits
  19. GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
  20. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  21. Trigger 518853: Swift detection of a probable Galactic transient
  22. GRB 120327A: Zadko optical observations
  23. GRB 120328A: Swift/UVOT Upper Limits
  24. GRB 120326A: Bassano Bresciano Observatory further optical observations
  25. GRB 120327A: MITSuME Ishigakijima Optical Observation
  26. GRB 120326A: MITSuME Ishigakijima Optical Observation
  27. GRB 120327A: NOT optical observations
  28. GRB 120328A: TAROT La Silla observatory optical observations
  29. GRB 120326A: Xinglong TNT further optical observation��correction for GCN Cir 13149)
  30. GRB 120326A: Xinglong TNT further optical observation
  31. GRB 120327A: GTC redshift confirmation
  32. GRB 120327A afterglow detection
  33. GRB 120326A: PAIRITEL NIR Observations
  34. GRB 120326A: Bassano Bresciano Observatory optical observations
  35. GRB 120326A: LOAO R-band Observations
  36. GRB 120326A : SMA submm observation
  37. GRB 120327A: X-shooter redshift
  38. GRB 120327A: Gemini-South redshift
  39. GRB 120327A: TAROT La Silla observatory optical decay
  40. GRB120326A: TNT optical observation
  41. GRB 120327A: IAC80 I-band observations
  42. GRB 120327A: REM NIR and optical observations
  43. GRB 120326A: Maisoncelles Observatory optical observations
  44. GRB 120327A: Liverpool Telescope Observations
  45. GRB 120327A: TAROT La Silla observatory optical detection
  46. GRB 120327A: Swift detection of a burst with an optical counterpart
  47. GRB 120326A: optical observation of GMG
  48. GRB 120326A : LOT optical observation
  49. GRB 120326A: T17 optical observations
  50. GRB 120326A: GTC redshift
  51. GRB 120323A: MASTER follow up observations
  52. GRB 120326A: Optical observations at Crni Vrh
  53. GRB120326A: IAC80 observations
  54. GRB 120326A: Liverpool Telescope observations
  55. Skynet/Dolomiti Observations of GRB120326A
  56. GRB 120326A: TAROT Calern observatory afterglow optical decay
  57. GRB 120326A: TAROT Calern observatory afterglow optical detection
  58. GRB 120326A: ROTSE-III Optical Limits
  59. GRB 120324A: CQUEAN rizY Observation
  60. GRB 120324A: Swift/UVOT Upper Limits
  61. GRB 120324A: TAROT La Silla observatory optical observations
  62. GRB 120324A: Liverpool Telescope optical candidate
  63. Simultaneous optical images of Swift pointing are available by GRT
  64. GRB 120320A: Zadko optical observations
  65. GRB 120229A: Magellan observations and limit on an optical afterglow
  66. GRB 120320A: Swift/UVOT Upper Limits
  67. GRB 120320A: MITSuME Okayama Optical upper limits
  68. GRB 120320A , optical observations
  69. GRB 120320A: BOOTES-4 optical upper limit
  70. GRB 120320A: MASTER optical observations
  71. GRB 111228A: possible detection of the SN with the TNG
  72. GRB 120312A: CrAO optical upper limit
  73. GRB 120311A: Optical follow-up
  74. GRB 120311B: Optical follow-up
  75. GRB 120311A: C88 optical limits
  76. GRB 120312A: Swift/UVOT Upper Limits
  77. GRB 120312A: MASTER-NET optical observations
  78. GRB 120312A: NOT observations
  79. GRB 120311A: VLT/X-shooter observations
  80. GRB 120311B: C88 optical limits
  81. GRB 120311B: Swift/UVOT Upper Limits
  82. GRB 120311B: MITSuME Okayama Optical upper limits
  83. GRB 120311A: Swift/UVOT Upper Limits
  84. GRB 120311A: CAHA 1.23m I-band early observations
  85. GRB 120311A: Liverpool Telescope optical candidate
  86. GRB 120308A : LOAO optical observation
  87. GRB 120308A: RTT150 optical observations
  88. GRB 120302A: RTT150 optical observations
  89. GRB 120308A: 1.23m CAHA I-band observations
  90. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  91. GRB 120308A: Swift/UVOT Detection
  92. GRB 120308A: IAC80 I-band observations
  93. GRB 120308A: confirmation of the optical afterglow
  94. GRB 120308A: Liverpool Telescope optical afterglow candidate
  95. GRB 120305A: D50 optical limits
  96. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  97. GRB 120305A: Swift/UVOT Upper Limits
  98. GRB 120305A - Liverpool Telescope Observations
  99. GRB 120305A: MASTER-NET early optical observations
  100. GRB 120302A: GROND detection of an afterglow candidate

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