ASTROSAT CZTI

Data Quality Report

Orbit 55882

Creation date: 2026-01-26T18:21:58.514598
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_030T02_9000006544_55882cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55882cztM0_level2_quad_clean.evt
Size (bytes)2,728,059,840481,259,520
Size2.5 GB 459.0 MB
Events in quadrant A29,544,1733,030,737
Events in quadrant B16,106,3423,513,703
Events in quadrant C28,770,7952,761,714
Events in quadrant D23,860,6582,860,912

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07100
B07100
C07100
D07100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0480
D0480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01123645
B0734705
C011144012
D0951795

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3498728228.065853%
B349873100.886043%
C34985488313.957410%
D3498613703.915852%

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 38887 34991 2502 2502 6.43% 7.15%
B 38887 34991 37 37 0.10% 0.11%
C 38886 34990 4017 4017 10.33% 11.48%
D 38886 34990 1189 1189 3.06% 3.40%

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 10838675 12558.58 3533 3446 862.8
A 15 32 2126942 2461.24 3533 3446 862.8
A 3 14 1282863 1482.91 3533 3446 862.8
B 0 199 525435 682.56 3609 3475 764.7
B 0 197 267488 345.25 3609 3475 764.7
B 2 249 250484 323.01 3609 3475 764.7
C 15 199 6765589 7518.28 3305 3281 899.4
C 12 254 5439252 6043.67 3305 3281 899.4
C 13 3 2642345 2934.09 3305 3281 899.4
D 11 129 3764485 3862.71 3473 3325 973.7
D 2 62 2598063 2664.79 3473 3325 973.7
D 3 12 721935 738.01 3473 3325 973.7

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