ASTROSAT CZTI

Data Quality Report

Orbit 56901

Creation date: 2026-04-04T19:45:20.560766
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_083T14_9000006564_56901cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56901cztM0_level2_quad_clean.evt
Size (bytes)446,719,68084,594,240
Size426.0 MB 80.7 MB
Events in quadrant A2,710,764573,586
Events in quadrant B3,352,221593,544
Events in quadrant C3,075,479552,423
Events in quadrant D6,922,522415,482

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127871
B0145081
C0137382
D0247361

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61011111.819374%
B61013044.982790%
C6100781.278689%
D6101142623.373218%

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 7016 6102 14 14 0.20% 0.23%
B 7016 6102 148 148 2.11% 2.43%
C 7015 6101 28 28 0.40% 0.46%
D 7016 6102 1264 1264 18.02% 20.71%

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 6 211 91268 569.23 639 620 159.2
A 3 14 32114 197.77 639 620 159.2
A 4 249 31039 191.02 639 620 159.2
B 10 16 381239 2925.41 609 585 130.1
B 5 172 254649 1952.54 609 585 130.1
B 10 247 75284 574.08 609 585 130.1
C 13 3 353750 2122.17 612 607 166.4
C 7 220 71917 428.53 612 607 166.4
C 1 16 48553 288.12 612 607 166.4
D 2 249 2655062 17274.85 549 525 153.7
D 2 31 786556 5115.23 549 525 153.7
D 3 12 393332 2556.26 549 525 153.7

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