ASTROSAT CZTI

Data Quality Report

Orbit 55650

Creation date: 2026-01-21T20:56:12.117044
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_55650cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55650cztM0_level2_quad_clean.evt
Size (bytes)477,043,20077,486,400
Size454.9 MB 73.9 MB
Events in quadrant A8,922,449318,319
Events in quadrant B2,460,672604,794
Events in quadrant C2,616,167526,663
Events in quadrant D3,200,967486,198

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0306091
B0120361
C0125272
D0139631

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5877271446.180024%
B5878701.190881%
C5877520.884805%
D58772173.692360%

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 6972 5878 2648 2648 37.98% 45.05%
B 6973 5879 6 6 0.09% 0.10%
C 6972 5878 29 29 0.42% 0.49%
D 6972 5878 149 149 2.14% 2.53%

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 6222271 51080.38 492 479 121.8
A 3 14 476503 3908.12 492 479 121.8
A 0 8 175622 1437.91 492 479 121.8
B 0 171 28758 221.35 598 578 127.3
B 5 248 23942 183.52 598 578 127.3
B 12 111 15311 115.73 598 578 127.3
C 6 223 155780 967.08 580 574 160.5
C 13 3 52370 322.74 580 574 160.5
C 9 38 43532 267.67 580 574 160.5
D 10 181 291705 1795.19 572 546 162.2
D 11 129 276077 1698.84 572 546 162.2
D 2 249 164179 1008.91 572 546 162.2

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