ASTROSAT CZTI

Data Quality Report

Orbit 55826

Creation date: 2026-01-22T11:52:12.147876
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_127T10_9000006542_55826cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55826cztM0_level2_quad_clean.evt
Size (bytes)444,006,72099,576,000
Size423.4 MB 95.0 MB
Events in quadrant A5,559,870611,295
Events in quadrant B3,150,786694,036
Events in quadrant C3,048,803637,053
Events in quadrant D4,129,607583,021

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213132
B0148432
C0148393
D0175812

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70265808.255053%
B70271782.533087%
C7026781.110162%
D70262834.027896%

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 9012 7030 399 399 4.43% 5.68%
B 9013 7030 5 5 0.06% 0.07%
C 9012 7030 17 17 0.19% 0.24%
D 9012 7029 143 143 1.59% 2.03%

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 0 8 875916 4797.12 737 717 182.4
A 12 115 583953 3196.82 737 717 182.4
A 4 249 487471 2667.99 737 717 182.4
B 0 213 109297 666.67 749 721 162.9
B 7 252 39329 237.06 749 721 162.9
B 12 111 19740 116.78 749 721 162.9
C 14 254 79821 388.12 741 735 203.8
C 6 223 22929 108.92 741 735 203.8
C 10 22 21890 103.82 741 735 203.8
D 11 129 615758 2989.04 726 696 205.8
D 7 96 339866 1648.28 726 696 205.8
D 2 62 65354 314.22 726 696 205.8

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