ASTROSAT CZTI

Data Quality Report

Orbit 52885

Creation date: 2025-07-16T12:33:48.514749
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/AS1C09_011T08_9000006482_52885cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52885cztM0_level2_quad_clean.evt
Size (bytes)613,045,44081,434,880
Size584.6 MB 77.7 MB
Events in quadrant A9,980,392389,147
Events in quadrant B3,348,228604,381
Events in quadrant C4,241,025528,224
Events in quadrant D4,648,918516,509

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0339231
B0142691
C0170201
D0180911

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6120222636.372549%
B61191522.484066%
C61203205.228758%
D61201943.169935%

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 7045 6120 2095 2095 29.74% 34.23%
B 7044 6119 86 86 1.22% 1.41%
C 7044 6120 271 271 3.85% 4.43%
D 7045 6121 201 201 2.85% 3.28%

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 9 191 6473547 46294.98 560 547 139.8
A 12 17 364432 2602.51 560 547 139.8
A 0 8 272901 1947.88 560 547 139.8
B 1 255 283390 2103.66 627 605 134.4
B 8 3 137244 1016.47 627 605 134.4
B 4 81 124407 920.97 627 605 134.4
C 7 80 1191135 7183.04 602 597 165.7
C 13 3 212443 1278.16 602 597 165.7
C 2 12 80656 483.03 602 597 165.7
D 3 224 489145 2798.3 608 580 174.6
D 2 37 430936 2464.91 608 580 174.6
D 8 176 420853 2407.15 608 580 174.6

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