ASTROSAT CZTI

Data Quality Report

Orbit 54908

Creation date: 2025-11-21T16:35:35.220547
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_014T01_9000006528_54908cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54908cztM0_level2_quad_clean.evt
Size (bytes)497,099,52094,337,280
Size474.1 MB 90.0 MB
Events in quadrant A3,437,645637,971
Events in quadrant B3,277,860681,583
Events in quadrant C6,544,460523,640
Events in quadrant D4,635,024559,147

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147822
B0145572
C02394511
D0183092

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6514891.366288%
B65142103.223826%
C6510114517.588326%
D65142924.482653%

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 7619 6515 15 15 0.20% 0.23%
B 7619 6515 119 119 1.56% 1.83%
C 7619 6513 858 858 11.26% 13.17%
D 7619 6515 237 237 3.11% 3.64%

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 14 506063 2870.86 712 694 176.0
A 0 8 89048 501.91 712 694 176.0
A 12 115 24041 132.63 712 694 176.0
B 5 185 364379 2433.97 696 669 149.4
B 10 247 85527 567.87 696 669 149.4
B 5 236 52270 345.32 696 669 149.4
C 4 5 2825159 16091.87 636 630 175.5
C 15 147 299735 1704.06 636 630 175.5
C 9 38 296171 1683.75 636 630 175.5
D 14 52 392685 2038.11 680 650 192.4
D 11 129 318862 1654.32 680 650 192.4
D 15 94 273310 1417.51 680 650 192.4

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