ASTROSAT CZTI

Data Quality Report

Orbit 52442

Creation date: 2025-06-27T21:23:49.119083
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/AS1A13_037T01_9000006476_52442cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52442cztM0_level2_quad_clean.evt
Size (bytes)784,707,84083,747,520
Size748.4 MB 79.9 MB
Events in quadrant A3,276,189625,903
Events in quadrant B3,742,172671,283
Events in quadrant C9,667,517429,888
Events in quadrant D11,828,771328,878

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149871
B0159351
C0335081
D0399361

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68782273.300378%
B68792483.605175%
C6879227133.013519%
D6878312245.391102%

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 7308 6878 25 25 0.34% 0.36%
B 7309 6879 11 11 0.15% 0.16%
C 7309 6880 1940 1940 26.54% 28.20%
D 7308 6878 2917 2917 39.92% 42.41%

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 8 249 170562 942.42 730 712 180.2
A 5 240 72146 396.35 730 712 180.2
A 3 14 45450 248.23 730 712 180.2
B 10 254 431246 2763.13 718 692 155.8
B 0 213 83325 530.31 718 692 155.8
B 4 170 81620 519.37 718 692 155.8
C 15 224 4332988 26601.8 596 592 162.9
C 12 254 1167673 7166.12 596 592 162.9
C 15 248 562604 3450.87 596 592 162.9
D 12 17 3080415 19169.4 560 535 160.7
D 15 93 1814276 11288.86 560 535 160.7
D 12 2 1782437 11090.69 560 535 160.7

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