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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"

45558 results found.

  1. GRB 030329, BVRI photometry
  2. GRB030429: Optical Observations
  3. GRB030501: TAROT candidate afterglow present in archival images
  4. GRB 030501: TAROT possible candidate counterpart
  5. IPN triangulation of GRB030501 (IBIS event; annulus)
  6. IPN triangulation of GRB030501B (annulus)
  7. GRB 030429: confirmation of afterglow candidate
  8. GRB030429, possible optical counterpart
  9. GRB030501 localized by INTEGRAL
  10. GRB030425: CrAO optical observation
  11. IPN triangulation of GRB030429 (annulus)
  12. IPN triangulation of GRB030428 (two large error boxes)
  13. GRB 030329 Oprical observations in Rozhen observatory
  14. GRB 030429: ROTSE-III observations
  15. GRB 030324: Radio Observations
  16. GRB030329 observed as a sudden ionospheric disturbance (SID)
  17. IPN triangulation of GRB030426 (annulus)
  18. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  19. IPN triangulation of GRB030425 (single error box)
  20. GRB030329, SPM optical observations
  21. GRB 030329, the review of the sky area in plate archive (1950-1998)
  22. GRB 030329: Spectral Evolution of SN 2003dh
  23. Optical Observations of GRB 030418 with Magellan
  24. GRB 030329: optical spectropolarimetry at VLT
  25. IPN triangulation of GRB030422C (annulus)
  26. IPN triangulation of GRB030422B (annulus)
  27. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  28. GRB030329: optical polarization
  29. IPN triangulation of GRB030422 (two large error boxes)
  30. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  31. GRB030329, optical observation
  32. IPN triangulation of GRB030421 (annulus)
  33. MASTER:optical observations GRB030418
  34. MASTER:optical observations probable GRB030414
  35. GRB030329: 444 AAVSO Measurements
  36. IPN triangulation of GRB030419 (annulus)
  37. MASTER:optical observations GRB030416
  38. ROTSE-III prompt optical detections of GRB 030418
  39. GRB030418: Upper limits from recent and historical observations.
  40. GRB030418: Kiso near infrared observations
  41. GRB 030418: Optical afterglow
  42. GRB 030418: Optical afterglow candidate
  43. GRB 030329 OT position
  44. GRB030329: Optical Observations
  45. OT GRB 030329: early UBVRcIc spectral evolution
  46. GRB030329, UBVRI polarimetry, R-polarization
  47. GRB 030329: SARA Optical Observations
  48. OT GRB 030329: early spectrum
  49. GRB030329: VR Photometry at TNG
  50. GRB030324: Candidate Optical Afterglow (Erratum)
  51. GRB030324: Candidate Optical Afterglow
  52. IPN triangulation of GRB030414 (small error box)
  53. GRB 030413: Optical Observations
  54. GRB 030329 Rc observations
  55. IPN triangulation of GRB030413 (small error box)
  56. IPN triangulation of GRB030410 (annulus)
  57. Superluminal motion in GRB 030329 (Correction)
  58. Superluminal motion in GRB 030329
  59. GRB 030329 and SN 2003dh
  60. GRB030329, optical position
  61. GRB 030329 VLBA Observations
  62. CORRECTION TO IPN TRIANGULATION OF GRB050403
  63. IPN triangulation of GRB030406 (small error box)
  64. IPN triangulation of GRB050403 (small error box)
  65. IPN triangulation of GRB030403 (annulus)
  66. GRB 030329: BVRI photometry at Asiago
  67. GRB 030329, light curve flattens
  68. GRB 030329: VLT V-band photometry
  69. GRB 030329: Supernova Confirmed
  70. GRB030329: RTT150 optical observations
  71. GRB030329: Near Infrared Observations at Gunma
  72. GRB030329: HET spectroscopic monitoring
  73. Kiso observation of the GRB030329 at April 6
  74. GRB 030329, color evolution
  75. GRB030328, UBVRcIc field photometry
  76. GRB030329: Optical observcations
  77. GRB030329: BV photographic observations
  78. GRB 030329 Optical observations
  79. GRB 030329, color evolution
  80. GRB 030329: possible color change
  81. GRB030329: RTT150 optical observations
  82. GRB 030329: Supernova Spectrum Emerging
  83. GRB030329: Kiso B and R band observations
  84. GRB030329: RTT150 optical observation
  85. GRB030329: More AAVSO VR obs
  86. GRB030328: R upper limit after 6 hours by MASTER
  87. GRB 030329: BV photographic observations
  88. GRB 030329: SARA Optical Observations
  89. GRB 030329: SARA Optical Observations
  90. GRB030329, fading resumes
  91. GRB 030329, BVRI photometry
  92. GRB030329: Optical observations
  93. SDSS 0.5m PT observations of GRB030329 (correction)
  94. SDSS 0.5m PT observations of GRB030329
  95. GRB 030329, Optical observations
  96. GRB 030329, nearby galaxies
  97. GRB030329, cessation of fading
  98. GRB030329: final R-band light curve by MASTER
  99. GRB030329 - more 15 GHz radio data
  100. GRB030329 Radio 23/43/90 GHz observations at Nobeyama

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