ASTROSAT CZTI

Data Quality Report

Orbit 57687

Creation date: 2026-05-27T16:12:35.231781
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_125T09_9000006578_57687cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57687cztM0_level2_quad_clean.evt
Size (bytes)639,956,16091,751,040
Size610.3 MB 87.5 MB
Events in quadrant A3,534,897653,166
Events in quadrant B6,218,177584,134
Events in quadrant C5,219,807600,200
Events in quadrant D8,182,825461,338

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151561
B0233471
C0203271
D0290021

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68721872.721187%
B6872139120.241560%
C68725568.090803%
D6872167324.345169%

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 7317 6873 1 1 0.01% 0.01%
B 7317 6873 731 731 9.99% 10.64%
C 7317 6873 367 367 5.02% 5.34%
D 7317 6873 1491 1491 20.38% 21.69%

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 3 14 473439 2553.97 754 733 185.1
A 3 245 66470 355.17 754 733 185.1
A 3 128 38251 202.7 754 733 185.1
B 5 185 3330180 24207.13 646 621 137.5
B 2 249 120120 868.8 646 621 137.5
B 10 247 64731 466.1 646 621 137.5
C 15 224 966953 4904.12 722 713 197.0
C 12 249 637798 3233.51 722 713 197.0
C 12 254 284811 1441.93 722 713 197.0
D 8 240 2962462 16178.21 651 620 183.1
D 8 160 1681200 9179.69 651 620 183.1
D 2 120 528900 2885.58 651 620 183.1

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