ASTROSAT CZTI

Data Quality Report

Orbit 51849

Creation date: 2025-04-29T19:07:50.493123
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/AS1C09_011T05_9000006466_51849cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51849cztM0_level2_quad_clean.evt
Size (bytes)845,184,96092,568,960
Size806.0 MB 88.3 MB
Events in quadrant A4,885,311667,437
Events in quadrant B6,483,306700,452
Events in quadrant C4,935,015644,055
Events in quadrant D14,407,699273,732

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0195320
B0243890
C0198381
D0478790

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74272303.096809%
B74286128.239095%
C74272253.029487%
D7427444959.903056%

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 7427 7427 195 195 2.63% 2.63%
B 7428 7428 477 477 6.42% 6.42%
C 7427 7427 213 213 2.87% 2.87%
D 7427 7427 4194 4194 56.47% 56.47%

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 8 62 407797 2124.19 766 747 191.6
A 12 3 312768 1628.28 766 747 191.6
A 8 246 176574 917.55 766 747 191.6
B 10 44 966144 6097.24 739 714 158.3
B 5 185 742497 4684.78 739 714 158.3
B 5 32 583389 3679.93 739 714 158.3
C 14 80 495320 2436.35 739 733 203.0
C 0 193 324888 1596.8 739 733 203.0
C 13 3 247406 1215.12 739 733 203.0
D 11 129 8522645 60772.1 494 476 140.2
D 7 60 2080352 14831.72 494 476 140.2
D 0 18 575198 4098.38 494 476 140.2

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