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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"

37583 results found.

  1. IPN triangulation of GRB030505B (large error box)
  2. IPN triangulation of GRB030505A (annulus)
  3. GRB030329: RTT150 optical observations and upper limit for a host
  4. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  5. GRB030501, optical observation
  6. GRB030501C triangulation (annulus)
  7. GRB030329: RTT150 optical observations and upper limit for a host
  8. GRB 030429: Radio Observations
  9. GRB 030429: redshift from VLT spectroscopy
  10. GRB 030429: IR photometry with IRSF/SIRIUS
  11. GRB030501B triangulation (single error box)
  12. GRB 030329 Optical Observations
  13. GRB 030329, BVRI photometry
  14. GRB 030501: TAROT possible candidate counterpart
  15. IPN triangulation of GRB030501 (IBIS event; annulus)
  16. IPN triangulation of GRB030501B (annulus)
  17. GRB 030429: confirmation of afterglow candidate
  18. GRB030429, possible optical counterpart
  19. GRB030501 localized by INTEGRAL
  20. GRB030425: CrAO optical observation
  21. IPN triangulation of GRB030429 (annulus)
  22. IPN triangulation of GRB030428 (two large error boxes)
  23. GRB 030329 Oprical observations in Rozhen observatory
  24. GRB 030429: ROTSE-III observations
  25. GRB 030324: Radio Observations
  26. GRB030329 observed as a sudden ionospheric disturbance (SID)
  27. IPN triangulation of GRB030426 (annulus)
  28. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  29. IPN triangulation of GRB030425 (single error box)
  30. GRB 030329, the review of the sky area in plate archive (1950-1998)
  31. GRB 030329: Spectral Evolution of SN 2003dh
  32. Optical Observations of GRB 030418 with Magellan
  33. GRB 030329: optical spectropolarimetry at VLT
  34. IPN triangulation of GRB030422C (annulus)
  35. IPN triangulation of GRB030422B (annulus)
  36. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  37. GRB030329: optical polarization
  38. IPN triangulation of GRB030422 (two large error boxes)
  39. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  40. IPN triangulation of GRB030421 (annulus)
  41. MASTER:optical observations GRB030418
  42. MASTER:optical observations probable GRB030414
  43. GRB030329: 444 AAVSO Measurements
  44. IPN triangulation of GRB030419 (annulus)
  45. MASTER:optical observations GRB030416
  46. ROTSE-III prompt optical detections of GRB 030418
  47. GRB030418: Upper limits from recent and historical observations.
  48. GRB030418: Kiso near infrared observations
  49. GRB 030418: Optical afterglow
  50. GRB 030418: Finder for afterglow candidate
  51. GRB 030418: Optical afterglow candidate
  52. GRB 030329 OT position
  53. OT GRB 030329: early UBVRcIc spectral evolution
  54. GRB030329, UBVRI polarimetry, R-polarization
  55. GRB 030329: SARA Optical Observations
  56. OT GRB 030329: early spectrum
  57. GRB030329: VR Photometry at TNG
  58. GRB030324: Candidate Optical Afterglow (Erratum)
  59. GRB030324: Candidate Optical Afterglow
  60. IPN triangulation of GRB030414 (small error box)
  61. GRB 030413: Optical Observations
  62. GRB 030329 Rc observations
  63. IPN triangulation of GRB030413 (small error box)
  64. IPN triangulation of GRB030410 (annulus)
  65. Superluminal motion in GRB 030329 (Correction)
  66. Superluminal motion in GRB 030329
  67. GRB 030329 and SN 2003dh
  68. GRB030329, optical position
  69. GRB 030329 VLBA Observations
  70. IPN triangulation of GRB030406 (small error box)
  71. IPN triangulation of GRB050403 (small error box)
  72. IPN triangulation of GRB030403 (annulus)
  73. GRB 030329: BVRI photometry at Asiago
  74. GRB 030329, light curve flattens
  75. GRB 030329: VLT V-band photometry
  76. If the SN/GRB connection confirmed
  77. GRB 030329: Supernova Confirmed
  78. GRB030329: RTT150 optical observations
  79. GRB030329: Near Infrared Observations at Gunma
  80. GRB030329: HET spectroscopic monitoring
  81. Kiso observation of the GRB030329 at April 6
  82. GRB 030329, color evolution
  83. GRB030328, UBVRcIc field photometry
  84. GRB 030329 Optical observations
  85. GRB 030329, color evolution
  86. GRB 030329: possible color change
  87. GRB030329: RTT150 optical observations
  88. GRB 030329: Supernova Spectrum Emerging
  89. GRB030329: Kiso B and R band observations
  90. GRB030329: RTT150 optical observation
  91. GRB030329: More AAVSO VR obs
  92. GRB030328: R upper limit after 6 hours by MASTER
  93. GRB 030329: BV photographic observations
  94. GRB 030329: SARA Optical Observations
  95. GRB 030329: SARA Optical Observations
  96. GRB030329, fading resumes
  97. GRB 030329, BVRI photometry
  98. SDSS 0.5m PT observations of GRB030329 (correction)
  99. SDSS 0.5m PT observations of GRB030329
  100. GRB 030329, Optical observations

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