ASTROSAT CZTI

Data Quality Report

Orbit 55052

Creation date: 2025-12-01T14:08:54.556273
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_025T01_9000006530_55052cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55052cztM0_level2_quad_clean.evt
Size (bytes)1,970,124,480277,997,760
Size1.8 GB 265.1 MB
Events in quadrant A16,544,8931,702,914
Events in quadrant B10,829,9532,178,201
Events in quadrant C10,420,7211,941,475
Events in quadrant D33,474,1661,117,581

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0685643427
B0507212639
C0495132683
D012604311944

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046022
B046323
C046121
D045820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21503367017.067386%
B215285152.392233%
C215622781.289305%
D21104864240.949583%

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 45022 21798 1882 1882 4.18% 8.63%
B 45022 21847 143 143 0.32% 0.65%
C 45022 21850 108 108 0.24% 0.49%
D 45022 21375 7023 7023 15.60% 32.86%

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 10 253 6614335 12970.16 2068 2019 509.8
A 0 8 1645040 3222.81 2068 2019 509.8
A 0 250 76635 146.36 2068 2019 509.8
B 4 81 745649 1494.92 2317 2227 497.3
B 5 185 612546 1227.27 2317 2227 497.3
B 0 182 93537 183.61 2317 2227 497.3
C 1 16 261495 415.6 2292 2274 623.7
C 12 252 247136 392.58 2292 2274 623.7
C 15 193 186159 294.82 2292 2274 623.7
D 11 129 16092392 31491.63 1799 1716 511.0
D 15 94 7137581 13965.85 1799 1716 511.0
D 6 239 640224 1249.65 1799 1716 511.0

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