ASTROSAT CZTI

Data Quality Report

Orbit 55891

Creation date: 2026-01-26T21:59:17.568754
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_55891cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55891cztM0_level2_quad_clean.evt
Size (bytes)789,963,840179,501,760
Size753.4 MB 171.2 MB
Events in quadrant A12,042,5841,436,037
Events in quadrant B7,864,4921,637,526
Events in quadrant C8,337,5511,462,523
Events in quadrant D9,77594

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03420
B03420
C03420
D03420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0479646
B0362023
C0381153
D0480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1697211636.852463%
B169734572.692512%
C169734512.657161%
D2400.000000%

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 18167 16976 759 759 4.18% 4.47%
B 18168 16977 35 35 0.19% 0.21%
C 18168 16977 192 192 1.06% 1.13%
D 24 24 0 0 0.00% 0.00%

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 7 64 1696829 3898.68 1762 1715 434.8
A 3 14 1219155 2800.06 1762 1715 434.8
A 12 115 1064403 2444.13 1762 1715 434.8
B 0 199 295601 771.84 1764 1694 380.8
B 7 0 200536 522.19 1764 1694 380.8
B 0 153 178650 464.71 1764 1694 380.8
C 12 252 623361 1318.3 1737 1716 471.5
C 15 199 581886 1230.35 1737 1716 471.5
C 15 147 191430 402.32 1737 1716 471.5
D 5 173 233 175.98 2 2 1.3
D 5 113 202 152.36 2 2 1.3
D 7 129 182 137.12 2 2 1.3

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