ASTROSAT CZTI

Data Quality Report

Orbit 55601

Creation date: 2026-01-07T23:46:04.871367
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_021T06_9000006538_55601cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55601cztM0_level2_quad_clean.evt
Size (bytes)403,079,04095,328,000
Size384.4 MB 90.9 MB
Events in quadrant A3,614,230611,159
Events in quadrant B3,547,403653,941
Events in quadrant C3,116,080592,101
Events in quadrant D4,112,870554,711

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157891
B0158081
C0147231
D0172143

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68081311.924207%
B68081802.643948%
C6809821.204288%
D68081201.762632%

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 7638 6809 116 116 1.52% 1.70%
B 7638 6809 119 119 1.56% 1.75%
C 7639 6810 57 57 0.75% 0.84%
D 7638 6809 147 147 1.92% 2.16%

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 12 115 465469 2743.82 685 665 169.4
A 3 14 382541 2254.28 685 665 169.4
A 8 249 94535 554.13 685 665 169.4
B 5 236 693118 4789.62 676 650 144.6
B 5 185 60935 416.98 676 650 144.6
B 7 0 44776 305.21 676 650 144.6
C 15 178 179884 974.82 673 666 183.8
C 10 19 76840 414.34 673 666 183.8
C 15 200 59106 317.87 673 666 183.8
D 8 160 832142 4380.53 665 636 189.8
D 11 129 207625 1090.46 665 636 189.8
D 2 249 171802 901.73 665 636 189.8

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