ASTROSAT CZTI

Data Quality Report

Orbit 55747

Creation date: 2026-01-17T10:37:03.136482
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_099T04_9000006540_55747cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55747cztM0_level2_quad_clean.evt
Size (bytes)676,722,24098,081,280
Size645.4 MB 93.5 MB
Events in quadrant A8,870,113528,293
Events in quadrant B3,216,018752,418
Events in quadrant C6,267,274617,188
Events in quadrant D6,167,227595,529

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310272
B0145502
C0233322
D0232314

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6832185827.195550%
B6832590.863583%
C683385512.512806%
D683277011.270492%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7797 6833 1467 1467 18.81% 21.47%
B 7797 6833 8 8 0.10% 0.12%
C 7798 6834 602 602 7.72% 8.81%
D 7797 6833 626 626 8.03% 9.16%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 32 5353101 32201.74 657 642 166.2
A 4 249 350451 2104.54 657 642 166.2
A 8 192 183773 1101.76 657 642 166.2
B 0 199 156221 974.66 739 714 159.6
B 7 0 61565 381.39 739 714 159.6
B 10 247 35074 215.36 739 714 159.6
C 15 199 1956229 10099.46 689 681 193.6
C 9 38 1215625 6274.6 689 681 193.6
C 15 147 111056 570.03 689 681 193.6
D 11 129 3223081 15750.58 708 675 204.6
D 5 38 52650 254.05 708 675 204.6
D 5 173 47846 230.56 708 675 204.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter