ASTROSAT CZTI

Data Quality Report

Orbit 20837

Creation date: 2024-06-27T18:20:09.177033
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/AS1A06_009T03_9000003072_20837cztM0_level2.evt modeM0/AS1A06_009T03_9000003072_20837cztM0_level2_quad_clean.evt
Size (bytes)882,950,400135,120,960
Size842.0 MB 128.9 MB
Events in quadrant A5,187,878851,461
Events in quadrant B5,529,880856,366
Events in quadrant C5,366,172833,940
Events in quadrant D9,911,293786,995

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0227413
B0235263
C0230013
D0371483

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11029490.444283%
B11029940.852298%
C110291010.915768%
D110293993.617735%

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 12454 11031 4 4 0.03% 0.04%
B 12454 11030 17 17 0.14% 0.15%
C 12454 11030 12 12 0.10% 0.11%
D 12454 11031 211 211 1.69% 1.91%

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 5 16 59140 216.41 1327 1299 267.3
A 2 79 28343 101.19 1327 1299 267.3
A 0 226 11564 38.41 1327 1299 267.3
B 7 220 146305 572.23 1323 1288 253.4
B 0 189 75974 294.71 1323 1288 253.4
B 3 64 49565 190.5 1323 1288 253.4
C 14 238 199172 663.3 1274 1284 298.3
C 9 54 187650 624.68 1274 1284 298.3
C 13 61 9173 26.44 1274 1284 298.3
D 1 20 4138452 13338.31 1273 1236 310.2
D 1 52 726571 2338.47 1273 1236 310.2
D 9 1 58136 183.44 1273 1236 310.2

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