ASTROSAT CZTI

Data Quality Report

Orbit 16900

Creation date: 2024-06-27T17:29:15.550404
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/AS1A05_004T03_9000002508_16900cztM0_level2.evt modeM0/AS1A05_004T03_9000002508_16900cztM0_level2_quad_clean.evt
Size (bytes)1,629,843,840188,737,920
Size1.5 GB 180.0 MB
Events in quadrant A16,382,8871,094,040
Events in quadrant B9,239,5531,168,792
Events in quadrant C8,779,7471,127,595
Events in quadrant D13,721,8211,061,218

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0612884
B0397144
C0382274
D0531865

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18327261014.241283%
B183271660.905767%
C183271460.796639%
D1832613387.301102%

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 20463 18330 1738 1738 8.49% 9.48%
B 20463 18331 26 26 0.13% 0.14%
C 20463 18331 3 3 0.01% 0.02%
D 20462 18330 797 797 3.90% 4.35%

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 15 174 8361001 20596.99 2028 1982 405.8
A 12 189 205536 501.57 2028 1982 405.8
A 4 2 21353 47.73 2028 1982 405.8
B 15 35 486241 1191.72 2135 2080 406.3
B 4 216 118022 285.38 2135 2080 406.3
B 0 229 91083 219.07 2135 2080 406.3
C 3 233 415334 857.11 2056 2068 482.2
C 14 238 315561 650.18 2056 2068 482.2
C 0 207 17569 32.15 2056 2068 482.2
D 1 52 5646592 11508.28 2007 1944 490.5
D 12 235 178775 360.52 2007 1944 490.5
D 10 199 118031 236.68 2007 1944 490.5

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