ASTROSAT CZTI

Data Quality Report

Orbit 55754

Creation date: 2026-01-18T01:25:55.902783
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_099T04_9000006540_55754cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55754cztM0_level2_quad_clean.evt
Size (bytes)839,784,96081,149,760
Size800.9 MB 77.4 MB
Events in quadrant A14,075,883240,588
Events in quadrant B3,552,440689,348
Events in quadrant C4,459,235609,058
Events in quadrant D8,464,808438,609

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0464961
B0154361
C0183851
D0300871

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6886458466.569852%
B68861231.786233%
C68873835.561202%
D6887184726.818644%

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 7431 6886 4267 4267 57.42% 61.97%
B 7431 6887 22 22 0.30% 0.32%
C 7432 6888 325 325 4.37% 4.72%
D 7432 6887 1765 1765 23.75% 25.63%

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 7021574 57085.91 492 480 123.0
A 12 115 4585277 37277.28 492 480 123.0
A 8 192 163259 1323.5 492 480 123.0
B 7 0 329723 2149.41 715 689 153.1
B 5 172 234209 1525.47 715 689 153.1
B 2 249 89678 581.32 715 689 153.1
C 15 199 945556 4981.9 689 682 189.7
C 9 38 312691 1645.08 689 682 189.7
C 1 16 151385 794.59 689 682 189.7
D 11 129 5923775 34426.61 600 572 172.1
D 3 12 80935 467.08 600 572 172.1
D 7 129 46869 269.09 600 572 172.1

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