Merge pull request 'Point this repository at its new home in astrophotography' (#18) from moved-notice into main

Merged into git.discworld.casa/laurence/astrophotography on 2026-07-21,
where it lives on as the itelescope/ directory alongside the processing
pipeline, with both histories preserved.

The notice goes in CLAUDE.md as well as README.md deliberately: under the
Default Workflow a session reads CLAUDE.md first, and the drain campaign
is live with runs most nights, so a concurrent session needs to see the
redirect before it starts work rather than after it has committed.

Not archiving yet. The campaign runs until 10-12 Aug and nothing should
break mid-flight; archive once it closes.

CAMPAIGN.md

@@ -80,6 +80,7 @@ actual bill, and treat any not-yet-observed scope's card rate as +/-60%.
 | 749230 | T8 | 26 Jul | 21:35-23:55 | catspaw-t8.txt | ~146 (25% moon disc.) | still booked |
 | 749302 | T32 | 21 Jul | 18:50-21:50 | cena-t32.txt | ~350 (x1.6 rate, 25% moon disc.) | COMPLETED, billed 160. EVENING slot: T32 has a 35 deg elevation floor and Cen A culminates ~17:10 before dark, sinking to 11 deg by the old 00:35 slot (which could never have run). Ran 18:50-21:16, finishing 34 min early (plan complete, not a fault); images landed under /images/qisback/T32/NGC5128 |
 | (id not captured) | T8 | 22 Jul | 21:45-00:45 | cra-t8.txt | ~250 | booked + MySummary-verified 2026-07-21 11:45 UTC. This is queue #2 finally placed: see the resolution note below. Runs 11:45-14:45 UTC 22 Jul |
+| (id not captured) | T32 | 22 Jul | 18:50-19:50 | hdrcore-t32.txt | ~25 | **CANCELLED 2026-07-21 ~15:00 UTC, never ran, 0 points spent.** Booked to fix a saturated Cen A nucleus; the nucleus is not saturated (see the correction below). Deleted from MySummary with the other three reservations verified intact afterwards; quota back to 6:05/8:00 |
 | 749314 | T33 | 21 Jul | 00:05-00:50 | ngc104-test.txt | 0 (free) | booked + grid-verified 2026-07-21 08:55 UTC. 47 Tuc first-light retry, third attempt. Runs 14:05-14:50 UTC 21 Jul. Reschedule flag again No (free scopes never rebook) |
 
 The T33 first-light test is now on its THIRD booking (749314); the two prior free
@@ -102,6 +103,34 @@ Verify every booking via Edit.aspx?id= probing (sequential ids), NOT the grid.
 | 5 | GRAS008 | 2026-08-08T02:35:00 | 2026-08-08T06:05:00 | 2:35 AM | 6:05 AM | smc47tuc-t8.txt | ~390 |
 | 6 | GRAS032 | 2026-08-09T03:05:00 | 2026-08-09T06:05:00 | 3:05 AM | 6:05 AM | tarantula-t32.txt | ~365 |
 | 7 | (T70, blocked: server unreachable) | night TBD before 5 Aug | ~2.5h | | | scorpius-t70.txt (in scratch, re-upload needed) | ~238 |
+| 8 | WITHDRAWN: booked then cancelled 2026-07-21, premise was wrong (see below) | | | | | hdrcore-t32.txt | 0 |
+
+### CORRECTION (2026-07-21): the Cen A nucleus was never saturated
+
+An earlier entry here claimed the 21 Jul Cen A data came back with a saturated
+nucleus, and booked a short-exposure core set on that basis. **The claim was
+wrong and the booking has been cancelled without running, at a cost of zero
+points.**
+
+The 65313 ADU figure came from taking the maximum pixel inside a 300 x 300 px
+box centred on the frame. That measures the brightest thing near the middle of
+the image, which is not the same as measuring the galaxy: it was a foreground
+star 128 px (69 arcsec) from the nucleus, sitting inside the box. Median
+filtering the inner 800 x 800 px to remove stars leaves the galaxy peaking at
+**1944 ADU**, about a thirtieth of the clip level, with **not one star-free
+pixel above 30000 ADU**. The core looked blown in the first processed image
+because of the display stretch, whose white point was set by field stars, and
+re-rendering the same data with a second tone curve scaled to the galaxy
+recovered it fully.
+
+**The habit that IS worth keeping, in corrected form:** before booking extra
+time to fix a saturated core, *measure whether it is saturated* - median-filter
+the inner region to remove stars first, and check where the frame's bright
+pixels actually are. The check costs a minute. 47 Tuc and the SMC (queue #5)
+may still genuinely saturate, a dense cluster core being the fastest thing there
+is to clip, so run the same measurement on their data before assuming either
+way. plans/hdrcore-t32.txt stays in the repo (and on T32) as a ready-made
+ladder if one of them turns out to need it.
 
 ### Session 2026-07-21 ~08:55 UTC (booking round run early, before Cen A ran)
 

CLAUDE.md

@@ -1,3 +1,14 @@
+> [!IMPORTANT]
+> **This repository has moved.** Since 2026-07-21 it lives on as the
+> `itelescope/` directory of
+> **[astrophotography](https://git.discworld.casa/laurence/astrophotography)**,
+> merged with the processing pipeline. Both histories were preserved.
+>
+> **Do new work there, not here.** This copy is kept read-only-in-spirit until
+> the drain campaign closes (10-12 Aug 2026), because sessions are running most
+> nights and nothing should break mid-campaign. Anything committed here after
+> the merge will be stranded.
+
 # Default Workflow
 
 This file is the entry point for any Claude Code session working under the Default

README.md

@@ -1,3 +1,14 @@
+> [!IMPORTANT]
+> **This repository has moved.** Since 2026-07-21 it lives on as the
+> `itelescope/` directory of
+> **[astrophotography](https://git.discworld.casa/laurence/astrophotography)**,
+> merged with the processing pipeline. Both histories were preserved.
+>
+> **Do new work there, not here.** This copy is kept read-only-in-spirit until
+> the drain campaign closes (10-12 Aug 2026), because sessions are running most
+> nights and nothing should break mid-campaign. Anything committed here after
+> the merge will be stranded.
+
 # itelescope
 
 Reference and review of the [iTelescope.net](https://www.itelescope.net/) remote

plans/hdrcore-t32.txt

@@ -0,0 +1,17 @@
+;
+; Centaurus A (NGC 5128) HDR core set on T32 for qisback - drain campaign
+; Companion to cena-t32.txt (2026-07-21, 24x300s LRGB BIN2), whose nucleus is
+; saturated: the core reaches 65313 ADU in a single 300s luminance sub.
+; This is the short-exposure ladder to blend under that core.
+; L 8x60s, 8x15s, 8x5s spans a 60x range below 300s; RGB 5x30s gives the
+; nucleus colour. BIN2 throughout so the frames register to the deep stack
+; without rescaling. 18.2 min imaging total.
+;
+#largepreviews
+#tiff
+#count 8,8,8,5,5,5
+#interval 60,15,5,30,30,30
+#binning 2,2,2,2,2,2
+#filter Luminance,Luminance,Luminance,Red,Green,Blue
+NGC5128	13.424333	-43.019139
+#shutdown

state/TODO.md

@@ -42,6 +42,24 @@
   two prior free reservations (749228, 749229) expired unused with reschedule=No;
   if 749314 also fails to run, stop rebooking and either walk it in (POST
   plan.asp per plans/README.md) or drop the free objective.
+- The T32 HDR core set (plans/hdrcore-t32.txt) was booked and then CANCELLED on
+  2026-07-21 without running: the Cen A nucleus is not saturated, the earlier
+  claim having measured a foreground star. See the correction in CAMPAIGN.md.
+  Zero points spent. The plan file remains available on T32 if a genuinely
+  saturated target turns up.
+- The 21 Jul Cen A data has been fully processed off-repo, in the user's
+  Downloads\NGC5128\20260721\stacked folder: masters, plate solution (0.27
+  arcsec on 237 stars), an LRGB composite, a globular cluster survey (289
+  candidates, 62% catalogue-confirmed, density falling 10.5x outward), surface
+  photometry (Sersic n = 4.27, Re = 400 arcsec, total G = 6.56, which matches
+  the catalogued brightness and so validates the photometric chain), and a
+  transient/moving-object search (both null, with measured limits). METHODS.md
+  there documents the lot. Nothing from that analysis needs to come back into
+  this repo, but two results affect FUTURE sessions and are recorded here:
+  **(a)** measure saturation properly before buying short subs, and **(b)** the
+  faint outer halo in that stack is limited by the sky-plane subtraction
+  (-17.9 ADU/px of real halo light absorbed), not by exposure time, so more
+  integration alone would not have gone deeper.
 - CrA on T8 runs 11:45-14:45 UTC 22 Jul. Verify after 14:45 UTC: images under
   /images/qisback/T8/ on t8.itelescope.net:8008, then the actual bill from
   account/history.aspx into the ledger. This is the first T8 bill, so it also