ASTROSAT CZTI

Data Quality Report

Orbit 40874

Creation date: 2024-06-27T22:21:36.864936
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/AS1A12_097T01_9000005574_40874cztM0_level2.fits modeM0/AS1A12_097T01_9000005574_40874cztM0_level2_quad_clean.evt
Size (bytes)715,492,800174,271,680
Size682.3 MB 166.2 MB
Events in quadrant A6,061,2041,157,146
Events in quadrant B4,852,1381,207,496
Events in quadrant C5,163,5651,151,916
Events in quadrant D9,564,5581,006,362

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245994
B0221333
C0221833
D0359653

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10890440.404040%
B10890220.202020%
C10890130.119376%
D108906525.987144%

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 13664 10892 24 24 0.18% 0.22%
B 13664 10892 6 6 0.04% 0.06%
C 13664 10892 5 5 0.04% 0.05%
D 13664 10892 595 595 4.35% 5.46%

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 10 83 974196 3977.25 1196 1169 244.6
A 13 248 249246 1014.01 1196 1169 244.6
A 12 189 203160 825.64 1196 1169 244.6
B 0 229 59960 255.02 1192 1159 230.6
B 15 35 40079 168.79 1192 1159 230.6
B 12 111 29722 123.88 1192 1159 230.6
C 15 214 457357 1654.73 1173 1181 275.7
C 9 54 43387 153.1 1173 1181 275.7
C 0 10 30156 105.1 1173 1181 275.7
D 12 79 2694223 9588.5 1139 1107 280.9
D 13 249 869208 3090.76 1139 1107 280.9
D 1 47 631432 2244.19 1139 1107 280.9

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