ASTROSAT CZTI

Data Quality Report

Orbit 56868

Creation date: 2026-04-02T13:28:20.125430
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_083T03_9000006562_56868cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56868cztM0_level2_quad_clean.evt
Size (bytes)454,976,64096,840,000
Size433.9 MB 92.4 MB
Events in quadrant A3,018,321653,756
Events in quadrant B5,609,660633,429
Events in quadrant C3,633,350615,518
Events in quadrant D4,078,371578,827

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134872
B0210412
C0153112
D0165742

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6460400.619195%
B646164810.029407%
C64611502.321622%
D64611882.909766%

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 7570 6460 8 8 0.11% 0.12%
B 7571 6461 490 490 6.47% 7.58%
C 7571 6461 102 102 1.35% 1.58%
D 7571 6461 174 174 2.30% 2.69%

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 7 64 118436 671.18 713 698 175.4
A 3 62 52793 296.97 713 698 175.4
A 3 14 44695 250.81 713 698 175.4
B 5 185 2054498 14376.27 668 643 142.9
B 10 16 743312 5198.42 668 643 142.9
B 8 128 64073 443.99 668 643 142.9
C 13 3 483560 2550.44 691 685 189.3
C 1 16 264637 1394.13 691 685 189.3
C 14 96 54966 286.7 691 685 189.3
D 8 240 463887 2382.43 688 656 194.4
D 2 249 373753 1918.86 688 656 194.4
D 7 96 355692 1825.98 688 656 194.4

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