ASTROSAT CZTI

Data Quality Report

Orbit 51802

Creation date: 2025-04-26T16:11:49.641517
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_090T01_9000006464_51802cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51802cztM0_level2_quad_clean.evt
Size (bytes)741,381,12092,249,280
Size707.0 MB 88.0 MB
Events in quadrant A7,429,423603,695
Events in quadrant B5,732,027634,652
Events in quadrant C5,363,238606,670
Events in quadrant D8,397,975477,960

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268732
B0216182
C0208222
D0296752

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67455167.650111%
B674583812.424018%
C67452613.869533%
D6745157623.365456%

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 7574 6744 303 303 4.00% 4.49%
B 7574 6744 612 612 8.08% 9.07%
C 7574 6744 59 59 0.78% 0.87%
D 7574 6744 1489 1489 19.66% 22.08%

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 12 3 2173562 12107.0 731 712 179.5
A 4 175 683233 3802.97 731 712 179.5
A 3 14 550423 3062.96 731 712 179.5
B 10 128 2204582 14467.09 711 684 152.3
B 4 206 93918 612.02 711 684 152.3
B 1 223 86145 560.99 711 684 152.3
C 10 22 1651360 8249.6 729 719 200.1
C 13 3 175603 874.04 729 719 200.1
C 5 250 128952 640.89 729 719 200.1
D 11 129 4444526 24140.55 666 642 184.1
D 3 12 336696 1825.55 666 642 184.1
D 8 176 227870 1234.37 666 642 184.1

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