ASTROSAT CZTI

Data Quality Report

Orbit 55477

Creation date: 2025-12-30T11:29:25.684428
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_099T01_9000006536_55477cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55477cztM0_level2_quad_clean.evt
Size (bytes)485,605,44091,330,560
Size463.1 MB 87.1 MB
Events in quadrant A3,320,739612,450
Events in quadrant B3,427,500643,212
Events in quadrant C4,383,042555,145
Events in quadrant D6,350,792511,341

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144691
B0148151
C0177827
D0232531

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63531442.266646%
B63532313.636077%
C63534116.469385%
D635366310.436014%

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 7308 6353 63 63 0.86% 0.99%
B 7308 6353 149 149 2.04% 2.35%
C 7309 6354 346 346 4.73% 5.45%
D 7307 6352 572 572 7.83% 9.01%

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 3 78 289139 1727.61 672 652 167.0
A 0 8 144377 860.7 672 652 167.0
A 12 115 59370 351.63 672 652 167.0
B 0 171 234023 1659.28 657 632 140.7
B 5 248 172893 1224.68 657 632 140.7
B 10 247 138079 977.17 657 632 140.7
C 13 3 1160062 6607.59 639 632 175.5
C 9 38 597569 3401.94 639 632 175.5
C 12 252 35031 196.04 639 632 175.5
D 11 129 2341020 12989.66 634 604 180.2
D 5 113 854621 4739.92 634 604 180.2
D 8 160 324529 1797.83 634 604 180.2

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