ASTROSAT CZTI

Data Quality Report

Orbit 54995

Creation date: 2025-11-27T14:32:37.133317
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_014T01_9000006528_54995cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54995cztM0_level2_quad_clean.evt
Size (bytes)736,761,60075,648,960
Size702.6 MB 72.1 MB
Events in quadrant A4,338,429564,791
Events in quadrant B3,256,276664,531
Events in quadrant C3,178,672592,354
Events in quadrant D16,008,78728,750

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172491
B0142561
C0140711
D0518263

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63015799.189018%
B63021602.538877%
C6302540.856871%
D6301604095.857800%

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 7451 6302 474 474 6.36% 7.52%
B 7452 6303 91 91 1.22% 1.44%
C 7452 6303 38 38 0.51% 0.60%
D 7450 6300 5799 5799 77.84% 92.05%

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 1341730 8514.92 638 622 157.5
A 3 14 262635 1663.56 638 622 157.5
A 0 8 118525 748.59 638 622 157.5
B 10 245 414040 2855.47 673 651 144.8
B 5 236 132427 910.24 673 651 144.8
B 12 111 17608 117.13 673 651 144.8
C 13 3 175126 952.33 663 657 183.2
C 6 223 103429 560.98 663 657 183.2
C 14 96 96738 524.45 663 657 183.2
D 15 94 14690916 228741.7 219 208 64.2
D 3 12 157200 2444.44 219 208 64.2
D 2 62 91101 1415.25 219 208 64.2

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