ASTROSAT CZTI

Data Quality Report

Orbit 55795

Creation date: 2026-01-20T09:41:29.884958
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_55795cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55795cztM0_level2_quad_clean.evt
Size (bytes)629,380,800102,242,880
Size600.2 MB 97.5 MB
Events in quadrant A9,627,017479,574
Events in quadrant B5,610,898756,085
Events in quadrant C2,992,456729,939
Events in quadrant D4,554,623670,594

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0331851
B0215001
C0146561
D0185381

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6603256538.845979%
B660368410.358928%
C6602951.438958%
D66023345.059073%

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 7743 6601 1905 1905 24.60% 28.86%
B 7743 6604 550 550 7.10% 8.33%
C 7742 6603 54 54 0.70% 0.82%
D 7742 6603 325 325 4.20% 4.92%

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 15 32 6374243 41774.42 557 546 152.6
A 7 64 482333 3157.72 557 546 152.6
A 4 249 283400 1853.88 557 546 152.6
B 5 172 2641730 17089.75 686 668 154.5
B 7 252 84146 540.17 686 668 154.5
B 7 0 67316 431.27 686 668 154.5
C 13 3 199728 968.64 692 685 205.5
C 15 147 40199 192.29 692 685 205.5
C 15 200 33772 161.02 692 685 205.5
D 11 129 926696 4452.92 681 651 208.0
D 3 12 541887 2602.55 681 651 208.0
D 5 222 111719 534.07 681 651 208.0

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