ASTROSAT CZTI

Data Quality Report

Orbit 56739

Creation date: 2026-03-24T21:45:26.441470
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_083T05_9000006560_56739cztM0_level2.fits modeM0/AS1A14_083T05_9000006560_56739cztM0_level2_quad_clean.evt
Size (bytes)497,652,48093,911,040
Size474.6 MB 89.6 MB
Events in quadrant A3,695,703615,189
Events in quadrant B4,546,513671,694
Events in quadrant C6,718,102531,855
Events in quadrant D2,959,613574,701

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156401
B0178751
C0245871
D0134401

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64533144.865954%
B64533224.989927%
C6453100815.620642%
D6454240.371862%

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 7607 6452 266 266 3.50% 4.12%
B 7607 6452 217 217 2.85% 3.36%
C 7607 6452 1026 1026 13.49% 15.90%
D 7608 6453 8 8 0.11% 0.12%

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 62 846498 4862.04 697 677 174.0
A 10 251 114882 656.49 697 677 174.0
A 4 3 11766 63.74 697 677 174.0
B 5 185 1355252 9224.48 691 667 146.8
B 4 206 171073 1160.43 691 667 146.8
B 8 128 79707 538.25 691 667 146.8
C 15 230 2990561 17012.68 637 629 175.7
C 6 223 526236 2990.7 637 629 175.7
C 13 3 228545 1296.84 637 629 175.7
D 2 236 52383 269.5 684 654 191.9
D 8 31 52163 268.35 684 654 191.9
D 5 173 50987 262.23 684 654 191.9

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